Support TOSCA functions in Node Filters
[sdc.git] / catalog-be / src / main / java / org / openecomp / sdc / be / tosca / ToscaExportHandler.java
index a7eac1b..f3327d7 100644 (file)
@@ -7,9 +7,9 @@
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
- * 
+ *
  *      http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * limitations under the License.
  * ============LICENSE_END=========================================================
  */
-
 package org.openecomp.sdc.be.tosca;
 
-import java.beans.IntrospectionException;
+import static org.apache.commons.collections.CollectionUtils.isNotEmpty;
+import static org.apache.commons.collections.MapUtils.isNotEmpty;
+import static org.openecomp.sdc.be.components.utils.PropertiesUtils.resolvePropertyValueFromInput;
+import static org.openecomp.sdc.tosca.datatypes.ToscaFunctions.GET_ATTRIBUTE;
+import static org.openecomp.sdc.tosca.datatypes.ToscaFunctions.GET_INPUT;
+import static org.openecomp.sdc.tosca.datatypes.ToscaFunctions.GET_PROPERTY;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.common.primitives.Ints;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParser;
+import com.google.gson.stream.JsonReader;
+import fj.data.Either;
+import java.io.StringReader;
+import java.nio.file.Path;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collection;
+import java.util.Collections;
 import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.LinkedHashMap;
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Objects;
 import java.util.Optional;
 import java.util.Set;
 import java.util.function.Supplier;
 import java.util.stream.Collectors;
-
 import org.apache.commons.collections.CollectionUtils;
 import org.apache.commons.collections.MapUtils;
-import org.apache.commons.lang.StringUtils;
+import org.apache.commons.io.FilenameUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.commons.lang3.tuple.ImmutablePair;
 import org.apache.commons.lang3.tuple.ImmutableTriple;
 import org.apache.commons.lang3.tuple.Triple;
+import org.onap.sdc.tosca.services.YamlUtil;
+import org.openecomp.sdc.be.components.impl.exceptions.SdcResourceNotFoundException;
+import org.openecomp.sdc.be.config.Configuration;
 import org.openecomp.sdc.be.config.ConfigurationManager;
-import org.openecomp.sdc.be.dao.titan.TitanOperationStatus;
+import org.openecomp.sdc.be.dao.janusgraph.JanusGraphOperationStatus;
+import org.openecomp.sdc.be.data.model.ToscaImportByModel;
 import org.openecomp.sdc.be.datatypes.components.ResourceMetadataDataDefinition;
+import org.openecomp.sdc.be.datatypes.elements.AttributeDataDefinition;
+import org.openecomp.sdc.be.datatypes.elements.CINodeFilterDataDefinition;
+import org.openecomp.sdc.be.datatypes.elements.InterfaceDataDefinition;
+import org.openecomp.sdc.be.datatypes.elements.ListDataDefinition;
+import org.openecomp.sdc.be.datatypes.elements.PropertyDataDefinition;
+import org.openecomp.sdc.be.datatypes.elements.PropertyFilterConstraintDataDefinition;
+import org.openecomp.sdc.be.datatypes.elements.PropertyFilterDataDefinition;
+import org.openecomp.sdc.be.datatypes.elements.RequirementNodeFilterCapabilityDataDefinition;
+import org.openecomp.sdc.be.datatypes.elements.SubstitutionFilterDataDefinition;
+import org.openecomp.sdc.be.datatypes.elements.SubstitutionFilterPropertyDataDefinition;
+import org.openecomp.sdc.be.datatypes.elements.ToscaArtifactDataDefinition;
+import org.openecomp.sdc.be.datatypes.elements.ToscaFunction;
 import org.openecomp.sdc.be.datatypes.enums.ComponentTypeEnum;
+import org.openecomp.sdc.be.datatypes.enums.JsonPresentationFields;
+import org.openecomp.sdc.be.datatypes.enums.OriginTypeEnum;
+import org.openecomp.sdc.be.datatypes.enums.ResourceTypeEnum;
+import org.openecomp.sdc.be.exception.ToscaExportException;
 import org.openecomp.sdc.be.model.ArtifactDefinition;
+import org.openecomp.sdc.be.model.AttributeDefinition;
+import org.openecomp.sdc.be.model.CapabilityDefinition;
+import org.openecomp.sdc.be.model.CapabilityRequirementRelationship;
 import org.openecomp.sdc.be.model.Component;
 import org.openecomp.sdc.be.model.ComponentInstance;
+import org.openecomp.sdc.be.model.ComponentInstanceAttribute;
 import org.openecomp.sdc.be.model.ComponentInstanceInput;
+import org.openecomp.sdc.be.model.ComponentInstanceInterface;
 import org.openecomp.sdc.be.model.ComponentInstanceProperty;
+import org.openecomp.sdc.be.model.ComponentParametersView;
 import org.openecomp.sdc.be.model.DataTypeDefinition;
-import org.openecomp.sdc.be.model.GroupDefinition;
 import org.openecomp.sdc.be.model.GroupInstance;
-import org.openecomp.sdc.be.model.GroupProperty;
 import org.openecomp.sdc.be.model.InputDefinition;
+import org.openecomp.sdc.be.model.InterfaceDefinition;
 import org.openecomp.sdc.be.model.PropertyDefinition;
-import org.openecomp.sdc.be.model.RequirementAndRelationshipPair;
+import org.openecomp.sdc.be.model.RelationshipInfo;
 import org.openecomp.sdc.be.model.RequirementCapabilityRelDef;
 import org.openecomp.sdc.be.model.RequirementDefinition;
 import org.openecomp.sdc.be.model.Resource;
 import org.openecomp.sdc.be.model.Service;
 import org.openecomp.sdc.be.model.cache.ApplicationDataTypeCache;
 import org.openecomp.sdc.be.model.category.CategoryDefinition;
-import org.openecomp.sdc.be.model.jsontitan.operations.ToscaOperationFacade;
+import org.openecomp.sdc.be.model.jsonjanusgraph.operations.ToscaOperationFacade;
+import org.openecomp.sdc.be.model.jsonjanusgraph.utils.ModelConverter;
 import org.openecomp.sdc.be.model.operations.api.StorageOperationStatus;
-import org.openecomp.sdc.be.model.tosca.converters.ToscaValueBaseConverter;
-import org.openecomp.sdc.be.tosca.model.IToscaMetadata;
+import org.openecomp.sdc.be.model.operations.impl.InterfaceLifecycleOperation;
+import org.openecomp.sdc.be.model.operations.impl.ModelOperation;
+import org.openecomp.sdc.be.model.tosca.converters.ToscaMapValueConverter;
+import org.openecomp.sdc.be.tosca.PropertyConvertor.PropertyType;
+import org.openecomp.sdc.be.tosca.builder.ToscaRelationshipBuilder;
+import org.openecomp.sdc.be.tosca.exception.ToscaConversionException;
+import org.openecomp.sdc.be.tosca.model.CapabilityFilter;
+import org.openecomp.sdc.be.tosca.model.NodeFilter;
 import org.openecomp.sdc.be.tosca.model.SubstitutionMapping;
+import org.openecomp.sdc.be.tosca.model.ToscaAttribute;
 import org.openecomp.sdc.be.tosca.model.ToscaCapability;
+import org.openecomp.sdc.be.tosca.model.ToscaDataType;
 import org.openecomp.sdc.be.tosca.model.ToscaGroupTemplate;
-import org.openecomp.sdc.be.tosca.model.ToscaMetadata;
 import org.openecomp.sdc.be.tosca.model.ToscaNodeTemplate;
 import org.openecomp.sdc.be.tosca.model.ToscaNodeType;
+import org.openecomp.sdc.be.tosca.model.ToscaPolicyTemplate;
 import org.openecomp.sdc.be.tosca.model.ToscaProperty;
+import org.openecomp.sdc.be.tosca.model.ToscaPropertyAssignment;
+import org.openecomp.sdc.be.tosca.model.ToscaRelationshipTemplate;
+import org.openecomp.sdc.be.tosca.model.ToscaRequirement;
 import org.openecomp.sdc.be.tosca.model.ToscaTemplate;
+import org.openecomp.sdc.be.tosca.model.ToscaTemplateArtifact;
 import org.openecomp.sdc.be.tosca.model.ToscaTemplateRequirement;
 import org.openecomp.sdc.be.tosca.model.ToscaTopolgyTemplate;
-import org.openecomp.sdc.be.tosca.model.VfModuleToscaMetadata;
-import org.openecomp.sdc.common.api.Constants;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
+import org.openecomp.sdc.be.tosca.utils.ForwardingPathToscaUtil;
+import org.openecomp.sdc.be.tosca.utils.InputConverter;
+import org.openecomp.sdc.be.tosca.utils.OutputConverter;
+import org.openecomp.sdc.common.log.enums.EcompLoggerErrorCode;
+import org.openecomp.sdc.common.log.wrappers.Logger;
+import org.openecomp.sdc.tosca.datatypes.ToscaFunctions;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.yaml.snakeyaml.DumperOptions;
 import org.yaml.snakeyaml.DumperOptions.FlowStyle;
@@ -92,855 +153,1786 @@ import org.yaml.snakeyaml.nodes.Tag;
 import org.yaml.snakeyaml.representer.Represent;
 import org.yaml.snakeyaml.representer.Representer;
 
-import fj.data.Either;
-
 @org.springframework.stereotype.Component("tosca-export-handler")
 public class ToscaExportHandler {
 
-       @Autowired
-       private ApplicationDataTypeCache dataTypeCache;
-
-       @Autowired
-       private ToscaOperationFacade toscaOperationFacade;
-
-       private CapabiltyRequirementConvertor capabiltyRequirementConvertor = CapabiltyRequirementConvertor.getInstance();
-       private PropertyConvertor propertyConvertor = PropertyConvertor.getInstance();
-
-       
-       private static Logger log = LoggerFactory.getLogger(ToscaExportHandler.class.getName());
-
-       public static final String TOSCA_VERSION = "tosca_simple_yaml_1_0";
-       public static final String SERVICE_NODE_TYPE_PREFIX = "org.openecomp.service.";
-       public static final String IMPORTS_FILE_KEY = "file";
-       public static final String TOSCA_TEMPLATE_NAME = "-template.yml";
-       public static final String TOSCA_INTERFACE_NAME = "-interface.yml";
-       public static final String ASSET_TOSCA_TEMPLATE = "assettoscatemplate";
-       public static final String VF_MODULE_TYPE_KEY = "vf_module_type";
-       public static final String VF_MODULE_DESC_KEY = "vf_module_description";
-       public static final String VOLUME_GROUP_KEY = "volume_group";
-       public static final String VF_MODULE_TYPE_BASE = "Base";
-       public static final String VF_MODULE_TYPE_EXPANSION = "Expansion";
-       public static final List<Map<String, Map<String, String>>> DEFAULT_IMPORTS = ConfigurationManager.getConfigurationManager().getConfiguration().getDefaultImports();
-       
-       
-       
-       public Either<ToscaRepresentation, ToscaError> exportComponent(Component component) {
-
-               Either<ToscaTemplate, ToscaError> toscaTemplateRes = convertToToscaTemplate(component);
-               if (toscaTemplateRes.isRight()) {
-                       return Either.right(toscaTemplateRes.right().value());
-               }
-               
-               ToscaTemplate toscaTemplate = toscaTemplateRes.left().value();
-               ToscaRepresentation toscaRepresentation = this.createToscaRepresentation(toscaTemplate);
-               return Either.left(toscaRepresentation);
-       }
-
-       public Either<ToscaRepresentation, ToscaError> exportComponentInterface(Component component) {
-               if(null == DEFAULT_IMPORTS) {
-                       log.debug("convertToToscaTemplate - failed to get Default Imports section from configuration");
-                       return Either.right(ToscaError.GENERAL_ERROR);
-               }
-               
-               ToscaTemplate toscaTemplate = new ToscaTemplate(TOSCA_VERSION);
-               toscaTemplate.setImports(new ArrayList<>(DEFAULT_IMPORTS));
-               Map<String, ToscaNodeType> nodeTypes = new HashMap<>();
-               Either<ToscaTemplate, ToscaError> toscaTemplateRes = convertInterfaceNodeType(component, toscaTemplate, nodeTypes);
-               if (toscaTemplateRes.isRight()) {
-                       return Either.right(toscaTemplateRes.right().value());
-               }       
-               
-               toscaTemplate = toscaTemplateRes.left().value();
-               ToscaRepresentation toscaRepresentation = this.createToscaRepresentation(toscaTemplate);
-               return Either.left(toscaRepresentation);
-       }
-
-       public ToscaRepresentation createToscaRepresentation(ToscaTemplate toscaTemplate) {
-               CustomRepresenter representer = new CustomRepresenter();
-               DumperOptions options = new DumperOptions();
-               options.setAllowReadOnlyProperties(false);
-               options.setPrettyFlow(true);
-
-               options.setDefaultFlowStyle(FlowStyle.FLOW);
-               options.setCanonical(false);
-
-               representer.addClassTag(toscaTemplate.getClass(), Tag.MAP);
-
-               representer.setPropertyUtils(new UnsortedPropertyUtils());
-               Yaml yaml = new Yaml(representer, options);
-
-               String yamlAsString = yaml.dumpAsMap(toscaTemplate);
-
-               StringBuilder sb = new StringBuilder();
-               sb.append(ConfigurationManager.getConfigurationManager().getConfiguration().getHeatEnvArtifactHeader());
-               sb.append(yamlAsString);
-               sb.append(ConfigurationManager.getConfigurationManager().getConfiguration().getHeatEnvArtifactFooter());
-
-               ToscaRepresentation toscaRepresentation = new ToscaRepresentation();
-               toscaRepresentation.setMainYaml(sb.toString());
-               toscaRepresentation.setDependencies(toscaTemplate.getDependencies());
-               
-               return toscaRepresentation;
-       }
-       
-       public Either<ToscaTemplate, ToscaError> getDependencies(Component component) {
-               ToscaTemplate toscaTemplate = new ToscaTemplate(null);
-               Either<ImmutablePair<ToscaTemplate, Map<String, Component>>, ToscaError> fillImports = fillImports(component,
-                               toscaTemplate);
-               if (fillImports.isRight()) {
-                       return Either.right(fillImports.right().value());
-               }
-               return Either.left(fillImports.left().value().left);
-       }
-
-       private Either<ToscaTemplate, ToscaError> convertToToscaTemplate(Component component) {
-               if(null == DEFAULT_IMPORTS) {
-                       log.debug("convertToToscaTemplate - failed to get Default Imports section from configuration");
-                       return Either.right(ToscaError.GENERAL_ERROR);
-               }
-               
-               log.trace("start tosca export for {}", component.getUniqueId());
-               ToscaTemplate toscaTemplate = new ToscaTemplate(TOSCA_VERSION);
-
-               toscaTemplate.setMetadata(convertMetadata(component));
-               toscaTemplate.setImports(new ArrayList<>(DEFAULT_IMPORTS));
-               Map<String, ToscaNodeType> nodeTypes = new HashMap<>();
-               if (ToscaUtils.isAtomicType(component)) {
-                       log.trace("convert component as node type");
-                       return convertNodeType(component, toscaTemplate, nodeTypes);
-               } else {
-                       log.trace("convert component as topology template");
-                       return convertToscaTemplate(component, toscaTemplate);
-               }
-
-       }
-
-       private Either<ToscaTemplate, ToscaError> convertToscaTemplate(Component component, ToscaTemplate toscaNode) {
-
-               Either<ImmutablePair<ToscaTemplate, Map<String, Component>>, ToscaError> importsRes = fillImports(component,
-                               toscaNode);
-               if (importsRes.isRight()) {
-                       return Either.right(importsRes.right().value());
-               }
-               toscaNode = importsRes.left().value().left;
-
-               Map<String, Component> componentCache = importsRes.left().value().right;
-               Either<Map<String, DataTypeDefinition>, TitanOperationStatus> dataTypesEither = dataTypeCache.getAll();
-               if (dataTypesEither.isRight()) {
-                       log.debug("Failed to retrieve all data types {}", dataTypesEither.right().value());
-                       return Either.right(ToscaError.GENERAL_ERROR);
-               }
-               Map<String, DataTypeDefinition> dataTypes = dataTypesEither.left().value();
-
-               ToscaTopolgyTemplate topologyTemplate = new ToscaTopolgyTemplate();
-
-               Either<ToscaTopolgyTemplate, ToscaError> inputs = fillInputs(component, topologyTemplate, dataTypes);
-               if (inputs.isRight()) {
-                       return Either.right(inputs.right().value());
-               }
-               topologyTemplate = inputs.left().value();
-
-               List<ComponentInstance> componentInstances = component.getComponentInstances();
-               Map<String, List<ComponentInstanceProperty>> componentInstancesProperties = component
-                               .getComponentInstancesProperties();
-               List<GroupDefinition> groups = component.getGroups();
-               if (componentInstances != null && !componentInstances.isEmpty()) {
-
-                       Either<Map<String, ToscaNodeTemplate>, ToscaError> nodeTemplates = convertNodeTemplates(component,
-                                       componentInstances, componentInstancesProperties, componentCache, dataTypes, topologyTemplate);
-                       if (nodeTemplates.isRight()) {
-                               return Either.right(nodeTemplates.right().value());
-                       }
-                       log.debug("node templates converted");
-
-                       topologyTemplate.setNode_templates(nodeTemplates.left().value());
-               }
-               Map<String, ToscaGroupTemplate> groupsMap = null;
-               if (groups != null && !groups.isEmpty()) {
-                       groupsMap = new HashMap<String, ToscaGroupTemplate>();
-                       for (GroupDefinition group : groups) {
-                               ToscaGroupTemplate toscaGroup = convertGroup(group);
-                               groupsMap.put(group.getName(), toscaGroup);
-
-                       }
-                       log.debug("groups converted");
-                       topologyTemplate.addGroups(groupsMap);
-               }
-               SubstitutionMapping substitutionMapping = new SubstitutionMapping();
-               String toscaResourceName = null;
-               switch (component.getComponentType()) {
-               case RESOURCE:
-                       toscaResourceName = ((ResourceMetadataDataDefinition) component.getComponentMetadataDefinition()
-                                       .getMetadataDataDefinition()).getToscaResourceName();
-                       break;
-               case SERVICE:
-                       toscaResourceName = SERVICE_NODE_TYPE_PREFIX
-                                       + component.getComponentMetadataDefinition().getMetadataDataDefinition().getSystemName();
-                       break;
-               default:
-                       log.debug("Not supported component type {}", component.getComponentType());
-                       return Either.right(ToscaError.NOT_SUPPORTED_TOSCA_TYPE);
-               }
-               substitutionMapping.setNode_type(toscaResourceName);
-
-               Either<SubstitutionMapping, ToscaError> capabilities = convertCapabilities(component, substitutionMapping,
-                               dataTypes);
-               if (capabilities.isRight()) {
-                       return Either.right(capabilities.right().value());
-               }
-               substitutionMapping = capabilities.left().value();
-
-               Either<SubstitutionMapping, ToscaError> requirements = capabiltyRequirementConvertor.convertSubstitutionMappingRequirements(component, substitutionMapping);
-               if (requirements.isRight()) {
-                       return Either.right(requirements.right().value());
-               }
-               substitutionMapping = requirements.left().value();
-
-               topologyTemplate.setSubstitution_mappings(substitutionMapping);
-
-               toscaNode.setTopology_template(topologyTemplate);
-               return Either.left(toscaNode);
-       }
-
-       private Either<ToscaTopolgyTemplate, ToscaError> fillInputs(Component component,
-                       ToscaTopolgyTemplate topologyTemplate, Map<String, DataTypeDefinition> dataTypes) {
-               if (log.isDebugEnabled())
-                       log.debug("fillInputs for component {}", component.getUniqueId());
-               List<InputDefinition> inputDef = component.getInputs();
-               Map<String, ToscaProperty> inputs = new HashMap<>();
-
-               if (inputDef != null) {
-                       inputDef.forEach(i -> {
-                               ToscaProperty property = propertyConvertor.convertProperty(dataTypes, i, false);
-                               inputs.put(i.getName(), property);
-                       });
-                       if (!inputs.isEmpty()) {
-                               topologyTemplate.setInputs(inputs);
-                       }
-               }
-               return Either.left(topologyTemplate);
-       }
-
-       private ToscaMetadata convertMetadata(Component component) {
-               return convertMetadata(component, false, null);
-       }
-
-       private ToscaMetadata convertMetadata(Component component, boolean isInstance,
-                       ComponentInstance componentInstance) {
-               ToscaMetadata toscaMetadata = new ToscaMetadata();
-               toscaMetadata.setName(component.getComponentMetadataDefinition().getMetadataDataDefinition().getName());
-               toscaMetadata.setInvariantUUID(component.getInvariantUUID());
-               toscaMetadata.setUUID(component.getUUID());
-               toscaMetadata.setDescription(component.getDescription());
-
-               List<CategoryDefinition> categories = component.getCategories();
-               CategoryDefinition categoryDefinition = categories.get(0);
-               toscaMetadata.setCategory(categoryDefinition.getName());
-
-               if (isInstance) {
-                       toscaMetadata.setVersion(component.getVersion());
-                       toscaMetadata.setCustomizationUUID(componentInstance.getCustomizationUUID());
-               }
-               switch (component.getComponentType()) {
-               case RESOURCE:
-                       Resource resource = (Resource) component;
-                       toscaMetadata.setType(resource.getResourceType().name());
-                       toscaMetadata.setSubcategory(categoryDefinition.getSubcategories().get(0).getName());
-                       toscaMetadata.setResourceVendor(resource.getVendorName());
-                       toscaMetadata.setResourceVendorRelease(resource.getVendorRelease());
-                       
-                       break;
-               case SERVICE:
-                       toscaMetadata.setType(component.getComponentType().getValue());
-                       if (!isInstance) {
-                               // DE268546     
-                               toscaMetadata.setServiceEcompNaming(((Service)component).isEcompGeneratedNaming());
-                               toscaMetadata.setEcompGeneratedNaming(((Service)component).isEcompGeneratedNaming());
-                               toscaMetadata.setNamingPolicy(((Service)component).getNamingPolicy());                          
-                       }
-                       break;
-               default:
-                       log.debug("Not supported component type {}", component.getComponentType());
-               }
-               return toscaMetadata;
-       }
-
-       private Either<ImmutablePair<ToscaTemplate, Map<String, Component>>, ToscaError> fillImports(Component component,
-                       ToscaTemplate toscaTemplate) {
-               
-               if(null == DEFAULT_IMPORTS) {
-                       log.debug("convertToToscaTemplate - failed to get Default Imports section from configuration");
-                       return Either.right(ToscaError.GENERAL_ERROR);
-               }
-               
-               Map<String, Component> componentCache = new HashMap<>();
-
-               if (!ToscaUtils.isAtomicType(component)) {
-                       List<ComponentInstance> componentInstances = component.getComponentInstances();
-                       if (componentInstances != null && !componentInstances.isEmpty()) {
-                               
-                               List<Map<String, Map<String, String>>> additionalImports = 
-                                               toscaTemplate.getImports() == null ? new ArrayList<>(DEFAULT_IMPORTS) : new ArrayList<>(toscaTemplate.getImports());
-                               
-                               List<Triple<String, String, Component>> dependecies = new ArrayList<>();
-
-                               Map<String, ArtifactDefinition> toscaArtifacts = component.getToscaArtifacts();
-                               ArtifactDefinition artifactDefinition = toscaArtifacts.get(ToscaExportHandler.ASSET_TOSCA_TEMPLATE);
-                               
-                               Map<String, Map<String, String>> importsListMember = new HashMap<>();
-                               Map<String, String> interfaceFiles = new HashMap<>();
-                               interfaceFiles.put(IMPORTS_FILE_KEY, getInterfaceFilename(artifactDefinition.getArtifactName()));
-                               StringBuilder keyNameBuilder = new StringBuilder();
-                               keyNameBuilder.append(component.getComponentType().toString().toLowerCase());
-                               keyNameBuilder.append("-");
-                               keyNameBuilder.append(component.getName());
-                               keyNameBuilder.append("-interface");
-                               importsListMember.put(keyNameBuilder.toString(), interfaceFiles);
-                               additionalImports.add(importsListMember);
-                               
-                               componentInstances.forEach(ci -> {
-                                       createDependency(componentCache, additionalImports, dependecies, ci);
-                               });
-                               toscaTemplate.setDependencies(dependecies);
-                               toscaTemplate.setImports(additionalImports);
-                       }
-               } else {
-                       log.debug("currently imports supported for VF and service only");
-               }       
-               return Either.left(new ImmutablePair<ToscaTemplate, Map<String, Component>>(toscaTemplate, componentCache));
-       }
-
-       private void createDependency(Map<String, Component> componentCache, List<Map<String, Map<String, String>>> imports,
-                       List<Triple<String, String, Component>> dependecies, ComponentInstance ci) {
-               Map<String, String> files = new HashMap<>();
-               Map<String, Map<String, String>> importsListMember = new HashMap<>();
-               StringBuilder keyNameBuilder;
-
-               Component componentRI = componentCache.get(ci.getComponentUid());
-               if (componentRI == null) {
-                       // all resource must be only once!
-                       Either<Component, StorageOperationStatus> resource = toscaOperationFacade.getToscaFullElement(ci.getComponentUid());
-                       if (resource.isRight()) {
-                               log.debug("Failed to fetch resource with id {} for instance {}");
-                       }
-                       Component fetchedComponent = resource.left().value();
-                       componentCache.put(fetchedComponent.getUniqueId(), fetchedComponent);
-                       componentRI = fetchedComponent;
-
-                       Map<String, ArtifactDefinition> toscaArtifacts = componentRI.getToscaArtifacts();
-                       ArtifactDefinition artifactDefinition = toscaArtifacts.get(ASSET_TOSCA_TEMPLATE);
-                       if (artifactDefinition != null) {
-                               String artifactName = artifactDefinition.getArtifactName();
-                               files.put(IMPORTS_FILE_KEY, artifactName);
-                               keyNameBuilder = new StringBuilder();
-                               keyNameBuilder.append(fetchedComponent.getComponentType().toString().toLowerCase());
-                               keyNameBuilder.append("-");
-                               keyNameBuilder.append(ci.getComponentName());
-                               importsListMember.put(keyNameBuilder.toString(), files);
-                               imports.add(importsListMember);
-                               dependecies.add(new ImmutableTriple<String, String, Component>(artifactName,
-                                               artifactDefinition.getEsId(), fetchedComponent));
-                               
-                               if(!ToscaUtils.isAtomicType(componentRI)) {
-                                       importsListMember = new HashMap<>();
-                                       Map<String, String> interfaceFiles = new HashMap<>();
-                                       interfaceFiles.put(IMPORTS_FILE_KEY, getInterfaceFilename(artifactName));
-                                       keyNameBuilder.append("-interface");
-                                       importsListMember.put(keyNameBuilder.toString(), interfaceFiles);
-                                       imports.add(importsListMember);
-                               }
-                       }
-               }
-       }
-
-       public static String getInterfaceFilename(String artifactName) {
-               String interfaceFileName = artifactName.substring(0, artifactName.lastIndexOf('.')) + ToscaExportHandler.TOSCA_INTERFACE_NAME;
-               return interfaceFileName;
-       }
-
-       private Either<ToscaTemplate, ToscaError> convertNodeType(Component component, ToscaTemplate toscaNode,
-                       Map<String, ToscaNodeType> nodeTypes) {
-               log.debug("start convert node type for {}", component.getUniqueId());
-               ToscaNodeType toscaNodeType = createNodeType(component);
-
-               Either<Map<String, DataTypeDefinition>, TitanOperationStatus> dataTypesEither = dataTypeCache.getAll();
-               if (dataTypesEither.isRight()) {
-                       log.debug("Failed to fetch all data types :", dataTypesEither.right().value());
-                       return Either.right(ToscaError.GENERAL_ERROR);
-               }
-
-               Map<String, DataTypeDefinition> dataTypes = dataTypesEither.left().value();
-               Either<ToscaNodeType, ToscaError> properties = propertyConvertor.convertProperties(component, toscaNodeType,
-                               dataTypes);
-               if (properties.isRight()) {
-                       return Either.right(properties.right().value());
-               }
-               toscaNodeType = properties.left().value();
-               log.debug("Properties converted for {}", component.getUniqueId());
-
-               //Extracted to method for code reuse
-               return convertReqCapAndTypeName(component, toscaNode, nodeTypes, toscaNodeType, dataTypes);
-       }
-       
-       private Either<ToscaTemplate, ToscaError> convertInterfaceNodeType(Component component, ToscaTemplate toscaNode,
-                       Map<String, ToscaNodeType> nodeTypes) {
-               log.debug("start convert node type for {}", component.getUniqueId());
-               ToscaNodeType toscaNodeType = createNodeType(component);
-
-               Either<Map<String, DataTypeDefinition>, TitanOperationStatus> dataTypesEither = dataTypeCache.getAll();
-               if (dataTypesEither.isRight()) {
-                       log.debug("Failed to fetch all data types :", dataTypesEither.right().value());
-                       return Either.right(ToscaError.GENERAL_ERROR);
-               }
-
-               Map<String, DataTypeDefinition> dataTypes = dataTypesEither.left().value();
-               
-               List<InputDefinition> inputDef = component.getInputs();
-               Map<String, ToscaProperty> inputs = new HashMap<>();
-
-               if (inputDef != null) {
-                       inputDef.forEach(i -> {
-                               ToscaProperty property = propertyConvertor.convertProperty(dataTypes, i, false);
-                               inputs.put(i.getName(), property);
-                       });
-                       if (!inputs.isEmpty()) {
-                               toscaNodeType.setProperties(inputs);
-                       }
-               }
-
-               //Extracted to method for code reuse
-               return convertReqCapAndTypeName(component, toscaNode, nodeTypes, toscaNodeType, dataTypes);
-       }
-
-       private Either<ToscaTemplate, ToscaError> convertReqCapAndTypeName(Component component, ToscaTemplate toscaNode,
-                       Map<String, ToscaNodeType> nodeTypes, ToscaNodeType toscaNodeType,
-                       Map<String, DataTypeDefinition> dataTypes) {
-               Either<ToscaNodeType, ToscaError> capabilities = convertCapabilities(component, toscaNodeType, dataTypes);
-               if (capabilities.isRight()) {
-                       return Either.right(capabilities.right().value());
-               }
-               toscaNodeType = capabilities.left().value();
-               log.debug("Capabilities converted for {}", component.getUniqueId());
-
-               Either<ToscaNodeType, ToscaError> requirements = capabiltyRequirementConvertor.convertRequirements(component,
-                               toscaNodeType);
-               if (requirements.isRight()) {
-                       return Either.right(requirements.right().value());
-               }
-               toscaNodeType = requirements.left().value();
-               log.debug("Requirements converted for {}", component.getUniqueId());
-
-               
-               String toscaResourceName;
-               switch (component.getComponentType()) {
-               case RESOURCE:
-                       toscaResourceName = ((ResourceMetadataDataDefinition) component.getComponentMetadataDefinition()
-                                       .getMetadataDataDefinition()).getToscaResourceName();
-                       break;
-               case SERVICE:
-                       toscaResourceName = SERVICE_NODE_TYPE_PREFIX
-                                       + component.getComponentMetadataDefinition().getMetadataDataDefinition().getSystemName();
-                       break;
-               default:
-                       log.debug("Not supported component type {}", component.getComponentType());
-                       return Either.right(ToscaError.NOT_SUPPORTED_TOSCA_TYPE);
-               }
-
-               nodeTypes.put(toscaResourceName, toscaNodeType);
-               toscaNode.setNode_types(nodeTypes);
-               log.debug("finish convert node type for {}", component.getUniqueId());
-               return Either.left(toscaNode);
-       }
-
-       private Either<Map<String, ToscaNodeTemplate>, ToscaError> convertNodeTemplates(Component component,
-                       List<ComponentInstance> componentInstances,
-                       Map<String, List<ComponentInstanceProperty>> componentInstancesProperties,
-                       Map<String, Component> componentCache, Map<String, DataTypeDefinition> dataTypes,
-                       ToscaTopolgyTemplate topologyTemplate) {
-
-               Either<Map<String, ToscaNodeTemplate>, ToscaError> convertNodeTemplatesRes = null;
-               log.debug("start convert topology template for {} for type {}", component.getUniqueId(),
-                               component.getComponentType());
-               Map<String, ToscaNodeTemplate> nodeTemplates = new HashMap<>();
-               Map<String, List<ComponentInstanceInput>> componentInstancesInputs = component.getComponentInstancesInputs();
-
-               Map<String, ToscaGroupTemplate> groupsMap = null;
-               for (ComponentInstance componentInstance : componentInstances) {
-                       ToscaNodeTemplate nodeTemplate = new ToscaNodeTemplate();
-                       nodeTemplate.setType(componentInstance.getToscaComponentName());
-
-                       Either<ToscaNodeTemplate, ToscaError> requirements = convertComponentInstanceRequirements(component,
-                                       componentInstance, component.getComponentInstancesRelations(), nodeTemplate);
-                       if (requirements.isRight()) {
-                               convertNodeTemplatesRes = Either.right(requirements.right().value());
-                               break;
-                       }
-                       String instanceUniqueId = componentInstance.getUniqueId();
-                       log.debug("Component instance Requirements converted for instance {}", instanceUniqueId);
-
-                       nodeTemplate = requirements.left().value();
-
-                       Component componentOfInstance = componentCache.get(componentInstance.getComponentUid());
-                       nodeTemplate.setMetadata(convertMetadata(componentOfInstance, true, componentInstance));
-
-                       Either<ToscaNodeTemplate, ToscaError> capabilties = capabiltyRequirementConvertor
-                                       .convertComponentInstanceCapabilties(componentInstance, dataTypes, nodeTemplate);
-                       if (capabilties.isRight()) {
-                               convertNodeTemplatesRes = Either.right(requirements.right().value());
-                               break;
-                       }
-                       log.debug("Component instance Capabilties converted for instance {}", instanceUniqueId);
-
-                       nodeTemplate = capabilties.left().value();
-                       Map<String, Object> props = new HashMap<>();
-
-                       if (componentOfInstance.getComponentType() == ComponentTypeEnum.RESOURCE) {
-                               // Adds the properties of parent component to map
-                               addPropertiesOfParentComponent(dataTypes, componentInstance, componentOfInstance, props);
-                       }
-
-                       if (null != componentInstancesProperties && componentInstancesProperties.containsKey(instanceUniqueId)) {
-                               addPropertiesOfComponentInstance(componentInstancesProperties, dataTypes, componentInstance,
-                                               instanceUniqueId, props);
-                       }
-
-                       if (componentInstancesInputs != null && componentInstancesInputs.containsKey(instanceUniqueId)) {
-                               addComponentInstanceInputs(dataTypes, componentInstancesInputs, componentInstance, instanceUniqueId,
-                                               props);
-                       }
-                       if (props != null && !props.isEmpty()) {
-                               nodeTemplate.setProperties(props);
-                       }
-
-                       List<GroupInstance> groupInstances = componentInstance.getGroupInstances();
-                       if (groupInstances != null) {
-                               if (groupsMap == null) {
-                                       groupsMap = new HashMap<>();
-                               }
-                               for (GroupInstance groupInst : groupInstances) {
-                                       ToscaGroupTemplate toscaGroup = convertGroupInstance(groupInst);
-
-                                       groupsMap.put(groupInst.getName(), toscaGroup);
-                               }
-                       }
-
-                       nodeTemplates.put(componentInstance.getName(), nodeTemplate);
-               }
-               if (groupsMap != null) {
-                       log.debug("instance groups added");
-                       topologyTemplate.addGroups(groupsMap);
-               }
-
-               if (convertNodeTemplatesRes == null) {
-                       convertNodeTemplatesRes = Either.left(nodeTemplates);
-               }
-               log.debug("finish convert topology template for {} for type {}", component.getUniqueId(),
-                               component.getComponentType());
-               return convertNodeTemplatesRes;
-       }
-
-       private void addComponentInstanceInputs(Map<String, DataTypeDefinition> dataTypes,
-                       Map<String, List<ComponentInstanceInput>> componentInstancesInputs, ComponentInstance componentInstance,
-                       String instanceUniqueId, Map<String, Object> props) {
-
-               List<ComponentInstanceInput> instanceInputsList = componentInstancesInputs.get(instanceUniqueId);
-               if (instanceInputsList != null) {
-                       instanceInputsList.forEach(input -> {
-                               Supplier<String> supplier = () -> input.getValue();
-                               convertAndAddValue(dataTypes, componentInstance, props, input, supplier);
-                       });
-               }
-       }
-
-       private void addPropertiesOfComponentInstance(
-                       Map<String, List<ComponentInstanceProperty>> componentInstancesProperties,
-                       Map<String, DataTypeDefinition> dataTypes, ComponentInstance componentInstance, String instanceUniqueId,
-                       Map<String, Object> props) {
-
-               if (!MapUtils.isEmpty(componentInstancesProperties)) {
-                       componentInstancesProperties.get(instanceUniqueId).stream()
-                                       // Filters out properties with empty ValueUniqueUid
-                                       .filter(e -> e.getValue() != null && !e.getValue().isEmpty() )
-                                       // Collects filtered properties to List
-                                       .collect(Collectors.toList()).stream()
-                                       // Converts and adds each value to property map
-                                       .forEach(prop -> convertAndAddValue(dataTypes, componentInstance, props, prop,
-                                                       () -> prop.getValue()));
-               }
-       }
-
-       private void addPropertiesOfParentComponent(Map<String, DataTypeDefinition> dataTypes,
-                       ComponentInstance componentInstance, Component componentOfInstance, Map<String, Object> props) {
-
-               List<PropertyDefinition> componentProperties = ((Resource) componentOfInstance).getProperties();
-               if (!CollectionUtils.isEmpty(componentProperties)) {
-                       componentProperties.stream()
-                                       // Filters out properties with empty default values
-                                       .filter(prop -> !StringUtils.isEmpty(prop.getDefaultValue()))
-                                       // Collects filtered properties to List
-                                       .collect(Collectors.toList()).stream()
-                                       // Converts and adds each value to property map
-                                       .forEach(prop -> convertAndAddValue(dataTypes, componentInstance, props, prop,
-                                                       () -> prop.getDefaultValue()));
-               }
-       }
-
-       /**
-        * @param dataTypes
-        * @param componentInstance
-        * @param props
-        * @param prop
-        * @param supplier
-        */
-       private void convertAndAddValue(Map<String, DataTypeDefinition> dataTypes, ComponentInstance componentInstance,
-                       Map<String, Object> props, PropertyDefinition prop, Supplier<String> supplier) {
-               Object convertedValue = convertValue(dataTypes, componentInstance, prop, supplier);
-               if (!ToscaValueBaseConverter.isEmptyObjectValue(convertedValue)) {
-                       props.put(prop.getName(), convertedValue);
-               }
-       }
-
-       private <T extends PropertyDefinition> Object convertValue(Map<String, DataTypeDefinition> dataTypes,
-                       ComponentInstance componentInstance, T input, Supplier<String> supplier) {
-               log.debug("Convert property or input value {} for instance {}", input.getName(),
-                               componentInstance.getUniqueId());
-               String propertyType = input.getType();
-               String innerType = null;
-               if (input.getSchema() != null && input.getSchema().getProperty() != null) {
-                       innerType = input.getSchema().getProperty().getType();
-               }
-               return propertyConvertor.convertToToscaObject(propertyType, supplier.get(), innerType, dataTypes);
-       }
-
-       private ToscaGroupTemplate convertGroup(GroupDefinition group) {
-               ToscaGroupTemplate toscaGroup = new ToscaGroupTemplate();
-               Map<String, String> members = group.getMembers();
-               if (members != null)
-                       toscaGroup.setMembers(new ArrayList<String>(members.keySet()));
-
-               Supplier<String> supplGroupType = () -> group.getType();
-               Supplier<String> supplDescription = () -> group.getDescription();
-               Supplier<List<? extends GroupProperty>> supplProperties = () -> group.convertToGroupProperties();
-               Supplier<String> supplgroupName = () -> group.getName();
-               Supplier<String> supplInvariantUUID = () -> group.getInvariantUUID();
-               Supplier<String> supplGroupUUID = () -> group.getGroupUUID();
-               Supplier<String> supplVersion = () -> group.getVersion();
-
-               IToscaMetadata toscaMetadata = fillGroup(toscaGroup, supplProperties, supplDescription, supplgroupName,
-                               supplInvariantUUID, supplGroupUUID, supplVersion, supplGroupType);
-               toscaGroup.setMetadata(toscaMetadata);
-               return toscaGroup;
-       }
-
-       private ToscaGroupTemplate convertGroupInstance(GroupInstance groupInstance) {
-               ToscaGroupTemplate toscaGroup = new ToscaGroupTemplate();
-
-               Supplier<String> supplGroupType = () -> groupInstance.getType();
-               Supplier<String> supplDescription = () -> groupInstance.getDescription();
-               Supplier<List<? extends GroupProperty>> supplProperties = () -> groupInstance.convertToGroupInstancesProperties();
-               Supplier<String> supplgroupName = () -> groupInstance.getGroupName();
-               Supplier<String> supplInvariantUUID = () -> groupInstance.getInvariantUUID();
-               Supplier<String> supplGroupUUID = () -> groupInstance.getGroupUUID();
-               Supplier<String> supplVersion = () -> groupInstance.getVersion();
-
-               IToscaMetadata toscaMetadata = fillGroup(toscaGroup, supplProperties, supplDescription, supplgroupName,
-                               supplInvariantUUID, supplGroupUUID, supplVersion, supplGroupType);
-
-               toscaMetadata.setCustomizationUUID(groupInstance.getCustomizationUUID());
-               toscaGroup.setMetadata(toscaMetadata);
-               return toscaGroup;
-       }
-
-       private IToscaMetadata fillGroup(ToscaGroupTemplate toscaGroup, Supplier<List<? extends GroupProperty>> props,
-                       Supplier<String> description, Supplier<String> groupName, Supplier<String> invariantUUID,
-                       Supplier<String> groupUUID, Supplier<String> version, Supplier<String> groupType) {
-               boolean isVfModule = groupType.get().equals(Constants.DEFAULT_GROUP_VF_MODULE) ? true : false;
-               toscaGroup.setType(groupType.get());
-
-               IToscaMetadata toscaMetadata;
-               if (!isVfModule) {
-                       toscaMetadata = new ToscaMetadata();
-               } else {
-                       toscaMetadata = new VfModuleToscaMetadata();
-
-                       Map<String, Object> properties = fillGroupProperties(props.get());
-
-                       properties.put(VF_MODULE_DESC_KEY, description.get());
-                       toscaGroup.setProperties(properties);
-               }
-               toscaMetadata.setName(groupName.get());
-               toscaMetadata.setInvariantUUID(invariantUUID.get());
-               toscaMetadata.setUUID(groupUUID.get());
-               toscaMetadata.setVersion(version.get());
-               return toscaMetadata;
-       }
-
-       private Map<String, Object> fillGroupProperties(List<? extends GroupProperty> groupProps) {
-               Map<String, Object> properties = new HashMap<>();
-               if(groupProps != null){
-                       for (GroupProperty gp : groupProps) {
-                               if (gp.getName().equals(Constants.IS_BASE)) {
-                                       Boolean isBase = Boolean.parseBoolean(gp.getValue());
-                                       String type = isBase ? VF_MODULE_TYPE_BASE : VF_MODULE_TYPE_EXPANSION;
-                                       properties.put(VF_MODULE_TYPE_KEY, type);
-                               } else {
-                                       Object value = null;
-                                       String type = gp.getType();
-       
-                                       switch (type) {
-                                       case "integer":
-                                               if (gp.getValue() != null) {
-                                                       value = Integer.valueOf(gp.getValue());
-                                               }
-                                               break;
-                                       case "boolean":
-                                               if (gp.getValue() != null) {
-                                                       value = Boolean.valueOf(gp.getValue());
-                                               }
-                                               break;
-       
-                                       default:
-                                               value = gp.getValue();
-                                               break;
-                                       }
-                                       properties.put(gp.getName(), value);
-                               }
-                       }
-               }
-               return properties;
-       }
-
-       private ToscaNodeType createNodeType(Component component) {
-               ToscaNodeType toscaNodeType = new ToscaNodeType();
-               if (ToscaUtils.isAtomicType(component)){
-                       if (((Resource) component).getDerivedFrom() != null){
-                               toscaNodeType.setDerived_from(((Resource) component).getDerivedFrom().get(0));
-                       }
-                       toscaNodeType.setDescription(component.getDescription()); // or name??
-               } else {
-                       String derivedFrom = null != component.getDerivedFromGenericType()? component.getDerivedFromGenericType() : "tosca.nodes.Root"; 
-                       toscaNodeType.setDerived_from(derivedFrom);
-               }
-               return toscaNodeType;
-       }
-       
-       private Either<ToscaNodeTemplate, ToscaError> convertComponentInstanceRequirements(Component component,
-                       ComponentInstance componentInstance, List<RequirementCapabilityRelDef> relations,
-                       ToscaNodeTemplate nodeTypeTemplate) {
-
-               List<ComponentInstance> instancesList = component.getComponentInstances();
-               List<Map<String, ToscaTemplateRequirement>> toscaRequirements = new ArrayList<>();
-               Map<String, List<RequirementDefinition>> reqMap = componentInstance.getRequirements();
-
-               relations.stream().filter(p -> componentInstance.getUniqueId().equals(p.getFromNode())).forEach(req -> {
-                       ComponentInstance toComponentInstance = instancesList.stream()
-                                       .filter(i -> req.getToNode().equals(i.getUniqueId())).findFirst().orElse(null);
-                       if (toComponentInstance == null) {
-                               log.debug("Faild to create relation between node {} to node {}", componentInstance.getName(),
-                                               req.getToNode());
-                               return;
-
-                       }
-                       RequirementAndRelationshipPair reqAndRelationshopPair = req.getRelationships().get(0);
-                       ToscaTemplateRequirement toscaRequirement = new ToscaTemplateRequirement();
-                       toscaRequirement.setRelationship(reqAndRelationshopPair.getRelationship().getType());
-                       toscaRequirement.setNode(toComponentInstance.getName());
-                       Optional<RequirementDefinition> findAny = reqMap.values().stream().flatMap(e -> e.stream())
-                                       .filter(e -> e.getName().equals(reqAndRelationshopPair.getRequirement())).findAny();
-                       if (findAny.isPresent()) {
-                               RequirementDefinition regDefinition = findAny.get();
-                               toscaRequirement.setCapability(regDefinition.getCapability());
-                       } else {
-                               log.debug("Faild to find relation between node {} to node {}", componentInstance.getName(),
-                                               req.getToNode());
-                               return;
-                       }
-                       Map<String, ToscaTemplateRequirement> reqmap = new HashMap<String, ToscaTemplateRequirement>();
-                       reqmap.put(reqAndRelationshopPair.getRequirement(), toscaRequirement);
-                       toscaRequirements.add(reqmap);
-
-               });
-
-               if (!toscaRequirements.isEmpty()) {
-                       nodeTypeTemplate.setRequirements(toscaRequirements);
-               }
-               log.debug("Finish convert Requirements for node type");
-               return Either.left(nodeTypeTemplate);
-       }
-
-       private Either<SubstitutionMapping, ToscaError> convertCapabilities(Component component, SubstitutionMapping substitutionMapping, Map<String, DataTypeDefinition> dataTypes) {
-               Map<String, String[]> toscaCapabilities = capabiltyRequirementConvertor.convertSubstitutionMappingCapabilities(component, dataTypes);
-               
-               if (!toscaCapabilities.isEmpty()) {
-                       substitutionMapping.setCapabilities(toscaCapabilities);
-               }
-               log.debug("Finish convert Capabilities for node type");
-
-               return Either.left(substitutionMapping);
-       }
-
-       private Either<ToscaNodeType, ToscaError> convertCapabilities(Component component, ToscaNodeType nodeType,
-                       Map<String, DataTypeDefinition> dataTypes) {
-               Map<String, ToscaCapability> toscaCapabilities = capabiltyRequirementConvertor.convertCapabilities(component,
-                               dataTypes);
-               if (!toscaCapabilities.isEmpty()) {
-                       nodeType.setCapabilities(toscaCapabilities);
-               }
-               log.debug("Finish convert Capabilities for node type");
-
-               return Either.left(nodeType);
-       }
-
-       private static class CustomRepresenter extends Representer {
-               public CustomRepresenter() {
-                       super();
-                       // null representer is exceptional and it is stored as an instance
-                       // variable.
-                       this.nullRepresenter = new RepresentNull();
-
-               }
-
-               @Override
-               protected NodeTuple representJavaBeanProperty(Object javaBean, Property property, Object propertyValue,
-                               Tag customTag) {
-                       if (propertyValue == null) {
-                               return null;
-                       } else {
-                               // skip not relevant for Tosca property
-                               if (property.getName().equals("dependencies")) {
-                                       return null;
-                               }
-                               NodeTuple defaultNode = super.representJavaBeanProperty(javaBean, property, propertyValue, customTag);
-
-                               return property.getName().equals("_defaultp_")
-                                               ? new NodeTuple(representData("default"), defaultNode.getValueNode()) : defaultNode;
-                       }
-               }
-
-               @Override
-               protected MappingNode representJavaBean(Set<Property> properties, Object javaBean) {
-                       // remove the bean type from the output yaml (!! ...)
-                       if (!classTags.containsKey(javaBean.getClass()))
-                               addClassTag(javaBean.getClass(), Tag.MAP);
-
-                       return super.representJavaBean(properties, javaBean);
-               }
-
-               private class RepresentNull implements Represent {
-                       public Node representData(Object data) {
-                               // possible values are here http://yaml.org/type/null.html
-                               return representScalar(Tag.NULL, "");
-                       }
-               }
-       }
-
-       private static class UnsortedPropertyUtils extends PropertyUtils {
-               @Override
-               protected Set<Property> createPropertySet(Class<? extends Object> type, BeanAccess bAccess)
-                               throws IntrospectionException {
-                       Collection<Property> fields = getPropertiesMap(type, BeanAccess.FIELD).values();
-                       return new LinkedHashSet<Property>(fields);
-               }
-       }
+    public static final String ASSET_TOSCA_TEMPLATE = "assettoscatemplate";
+    private static final Logger log = Logger.getLogger(ToscaExportHandler.class);
+    private static final String INVARIANT_UUID = "invariantUUID";
+    private static final String TOSCA_VERSION = "tosca_simple_yaml_1_3";
+    private static final String SERVICE_NODE_TYPE_PREFIX = "org.openecomp.service.";
+    private static final String IMPORTS_FILE_KEY = "file";
+    private static final String TOSCA_INTERFACE_NAME = "-interface.yml";
+    private static final String FAILED_TO_GET_DEFAULT_IMPORTS_CONFIGURATION = "convertToToscaTemplate - failed to get Default Imports section from configuration";
+    private static final String NOT_SUPPORTED_COMPONENT_TYPE = "Not supported component type {}";
+    private static final String NATIVE_ROOT = "tosca.nodes.Root";
+    private static final List<String> EXCLUDED_CATEGORY_SPECIFIC_METADATA = List
+        .of("Service Function", "Service Role", "Naming Policy", "Service Type");
+    private static final YamlUtil yamlUtil = new YamlUtil();
+    private final ApplicationDataTypeCache applicationDataTypeCache;
+    private final ToscaOperationFacade toscaOperationFacade;
+    private final CapabilityRequirementConverter capabilityRequirementConverter;
+    private final PolicyExportParser policyExportParser;
+    private final GroupExportParser groupExportParser;
+    private final PropertyConvertor propertyConvertor;
+    private final AttributeConverter attributeConverter;
+    private final InputConverter inputConverter;
+    private final OutputConverter outputConverter;
+    private final InterfaceLifecycleOperation interfaceLifecycleOperation;
+    private final InterfacesOperationsConverter interfacesOperationsConverter;
+    private final ModelOperation modelOperation;
+
+    @Autowired
+    public ToscaExportHandler(final ApplicationDataTypeCache applicationDataTypeCache,
+                              final ToscaOperationFacade toscaOperationFacade,
+                              final CapabilityRequirementConverter capabilityRequirementConverter,
+                              final PolicyExportParser policyExportParser,
+                              final GroupExportParser groupExportParser,
+                              final PropertyConvertor propertyConvertor,
+                              final AttributeConverter attributeConverter,
+                              final InputConverter inputConverter,
+                              final OutputConverter outputConverter,
+                              final InterfaceLifecycleOperation interfaceLifecycleOperation,
+                              final InterfacesOperationsConverter interfacesOperationsConverter,
+                              final ModelOperation modelOperation) {
+        this.applicationDataTypeCache = applicationDataTypeCache;
+        this.toscaOperationFacade = toscaOperationFacade;
+        this.capabilityRequirementConverter = capabilityRequirementConverter;
+        this.policyExportParser = policyExportParser;
+        this.groupExportParser = groupExportParser;
+        this.propertyConvertor = propertyConvertor;
+        this.attributeConverter = attributeConverter;
+        this.inputConverter = inputConverter;
+        this.outputConverter = outputConverter;
+        this.interfaceLifecycleOperation = interfaceLifecycleOperation;
+        this.interfacesOperationsConverter = interfacesOperationsConverter;
+        this.modelOperation = modelOperation;
+    }
+
+    public static String getInterfaceFilename(String artifactName) {
+        return artifactName.substring(0, artifactName.lastIndexOf('.')) + TOSCA_INTERFACE_NAME;
+    }
+
+    private static void removeOperationImplementationForProxyNodeType(Map<String, InterfaceDefinition> proxyComponentInterfaces) {
+        if (MapUtils.isEmpty(proxyComponentInterfaces)) {
+            return;
+        }
+        proxyComponentInterfaces.values().stream().map(InterfaceDataDefinition::getOperations).filter(MapUtils::isNotEmpty)
+            .forEach(operations -> operations.values().forEach(operation -> operation.setImplementation(null)));
+    }
+
+    public Either<ToscaRepresentation, ToscaError> exportComponent(Component component) {
+        return convertToToscaTemplate(component).left().map(this::createToscaRepresentation);
+    }
+
+    public Either<ToscaRepresentation, ToscaError> exportComponentInterface(final Component component, final boolean isAssociatedComponent) {
+        final List<Map<String, Map<String, String>>> imports = new ArrayList<>(getDefaultToscaImports(component.getModel()));
+        if (CollectionUtils.isEmpty(imports)) {
+            log.debug(FAILED_TO_GET_DEFAULT_IMPORTS_CONFIGURATION);
+            return Either.right(ToscaError.GENERAL_ERROR);
+        }
+        List<Triple<String, String, Component>> dependencies = new ArrayList<>();
+        if (component.getDerivedFromGenericType() != null && !component.getDerivedFromGenericType()
+            .startsWith("org.openecomp.resource.abstract.nodes.")) {
+            final Either<Component, StorageOperationStatus> baseType = toscaOperationFacade
+                .getByToscaResourceNameAndVersion(component.getDerivedFromGenericType(), component.getDerivedFromGenericVersion(),
+                    component.getModel());
+            if (baseType.isLeft() && baseType.left().value() != null) {
+                addDependencies(imports, dependencies, baseType.left().value());
+            } else {
+                log.debug("Failed to fetch derived from type {}", component.getDerivedFromGenericType());
+            }
+        }
+
+        String toscaVersion = null;
+        if (component instanceof Resource) {
+            toscaVersion = ((Resource) component).getToscaVersion();
+        }
+        ToscaTemplate toscaTemplate = new ToscaTemplate(toscaVersion != null ? toscaVersion : TOSCA_VERSION);
+        toscaTemplate.setImports(imports);
+        final Map<String, ToscaNodeType> nodeTypes = new HashMap<>();
+        final Either<ToscaTemplate, ToscaError> toscaTemplateRes = convertInterfaceNodeType(new HashMap<>(), component, toscaTemplate, nodeTypes,
+            isAssociatedComponent);
+        if (toscaTemplateRes.isRight()) {
+            return Either.right(toscaTemplateRes.right().value());
+        }
+        toscaTemplate = toscaTemplateRes.left().value();
+        toscaTemplate.setDependencies(dependencies);
+        ToscaRepresentation toscaRepresentation = this.createToscaRepresentation(toscaTemplate);
+        return Either.left(toscaRepresentation);
+    }
+
+    private ToscaRepresentation createToscaRepresentation(ToscaTemplate toscaTemplate) {
+        CustomRepresenter representer = new CustomRepresenter();
+        DumperOptions options = new DumperOptions();
+        options.setAllowReadOnlyProperties(false);
+        options.setPrettyFlow(true);
+        options.setDefaultFlowStyle(FlowStyle.FLOW);
+        options.setCanonical(false);
+        representer.addClassTag(toscaTemplate.getClass(), Tag.MAP);
+        representer.setPropertyUtils(new UnsortedPropertyUtils());
+        Yaml yaml = new Yaml(representer, options);
+        String yamlAsString = yaml.dumpAsMap(toscaTemplate);
+        StringBuilder sb = new StringBuilder();
+        sb.append(getConfiguration().getHeatEnvArtifactHeader());
+        sb.append(yamlAsString);
+        sb.append(getConfiguration().getHeatEnvArtifactFooter());
+        return ToscaRepresentation.make(sb.toString().getBytes(), toscaTemplate);
+    }
+
+    public Either<ToscaTemplate, ToscaError> getDependencies(Component component) {
+        ToscaTemplate toscaTemplate = new ToscaTemplate(null);
+        Either<ImmutablePair<ToscaTemplate, Map<String, Component>>, ToscaError> fillImports = fillImports(component, toscaTemplate);
+        if (fillImports.isRight()) {
+            return Either.right(fillImports.right().value());
+        }
+        return Either.left(fillImports.left().value().left);
+    }
+
+    public Either<ToscaTemplate, ToscaError> convertToToscaTemplate(final Component component) {
+        final List<Map<String, Map<String, String>>> defaultToscaImportConfig = getDefaultToscaImports(component.getModel());
+        if (CollectionUtils.isEmpty(defaultToscaImportConfig)) {
+            log.debug(FAILED_TO_GET_DEFAULT_IMPORTS_CONFIGURATION);
+            return Either.right(ToscaError.GENERAL_ERROR);
+        }
+        log.trace("start tosca export for {}", component.getUniqueId());
+        String toscaVersion = null;
+        if (component instanceof Resource) {
+            toscaVersion = ((Resource) component).getToscaVersion();
+        }
+        final ToscaTemplate toscaTemplate = new ToscaTemplate(toscaVersion != null ? toscaVersion : TOSCA_VERSION);
+        toscaTemplate.setMetadata(convertMetadata(component));
+        toscaTemplate.setImports(new ArrayList<>(defaultToscaImportConfig));
+        final Map<String, ToscaNodeType> nodeTypes = new HashMap<>();
+        if (ModelConverter.isAtomicComponent(component)) {
+            log.trace("convert component as node type");
+            return convertNodeType(new HashMap<>(), component, toscaTemplate, nodeTypes);
+        } else {
+            log.trace("convert component as topology template");
+            return convertToscaTemplate(component, toscaTemplate);
+        }
+    }
+
+    private List<Map<String, Map<String, String>>> getDefaultToscaImports(final String modelId) {
+        if (modelId == null) {
+            return getDefaultToscaImportConfig();
+        }
+
+        final List<ToscaImportByModel> allModelImports = modelOperation.findAllModelImports(modelId, true);
+        final List<Map<String, Map<String, String>>> importList = new ArrayList<>();
+        final Set<Path> addedPathList = new HashSet<>();
+        for (final ToscaImportByModel toscaImportByModel : allModelImports) {
+            var importPath = Path.of(toscaImportByModel.getFullPath());
+            if (addedPathList.contains(importPath)) {
+                importPath = ToscaDefaultImportHelper.addModelAsFilePrefix(importPath, toscaImportByModel.getModelId());
+            }
+            final String fileName = FilenameUtils.getBaseName(importPath.toString());
+            importList.add(Map.of(fileName, Map.of("file", importPath.toString())));
+            addedPathList.add(importPath);
+        }
+        return importList;
+    }
+
+    private Either<ToscaTemplate, ToscaError> convertToscaTemplate(Component component, ToscaTemplate toscaNode) {
+        Either<ImmutablePair<ToscaTemplate, Map<String, Component>>, ToscaError> importsRes = fillImports(component, toscaNode);
+        if (importsRes.isRight()) {
+            return Either.right(importsRes.right().value());
+        }
+        toscaNode = importsRes.left().value().left;
+        Map<String, Component> componentCache = importsRes.left().value().right;
+        Either<Map<String, ToscaNodeType>, ToscaError> nodeTypesMapEither = createProxyNodeTypes(componentCache, component);
+        if (nodeTypesMapEither.isRight()) {
+            log.debug("Failed to fetch normative service proxy resource by tosca name, error {}", nodeTypesMapEither.right().value());
+            return Either.right(nodeTypesMapEither.right().value());
+        }
+        Map<String, ToscaNodeType> nodeTypesMap = nodeTypesMapEither.left().value();
+        if (nodeTypesMap != null && !nodeTypesMap.isEmpty()) {
+            toscaNode.setNode_types(nodeTypesMap);
+        }
+        createServiceSubstitutionNodeTypes(componentCache, component, toscaNode);
+        Either<Map<String, Object>, ToscaError> proxyInterfaceTypesEither = createProxyInterfaceTypes(component);
+        if (proxyInterfaceTypesEither.isRight()) {
+            log.debug("Failed to populate service proxy local interface types in tosca, error {}", nodeTypesMapEither.right().value());
+            return Either.right(proxyInterfaceTypesEither.right().value());
+        }
+        Map<String, Object> proxyInterfaceTypes = proxyInterfaceTypesEither.left().value();
+        if (MapUtils.isNotEmpty(proxyInterfaceTypes)) {
+            toscaNode.setInterface_types(proxyInterfaceTypes);
+        }
+        Either<Map<String, DataTypeDefinition>, JanusGraphOperationStatus> dataTypesEither = applicationDataTypeCache.getAll(component.getModel());
+        if (dataTypesEither.isRight()) {
+            log.debug("Failed to retrieve all data types {}", dataTypesEither.right().value());
+            return Either.right(ToscaError.GENERAL_ERROR);
+        }
+        Map<String, DataTypeDefinition> dataTypes = dataTypesEither.left().value();
+        ToscaTopolgyTemplate topologyTemplate = new ToscaTopolgyTemplate();
+        List<InputDefinition> inputDef = component.getInputs();
+        Map<String, ToscaProperty> inputs = inputConverter.convertInputs(inputDef, dataTypes);
+        if (!inputs.isEmpty()) {
+            topologyTemplate.setInputs(inputs);
+        }
+        final Map<String, ToscaProperty> outputs;
+        try {
+            outputs = outputConverter.convert(component.getOutputs(), dataTypes);
+        } catch (final ToscaConversionException e) {
+            log.error(EcompLoggerErrorCode.SCHEMA_ERROR, ToscaExportHandler.class.getName(),
+                "Could not parse component '{}' outputs. Component unique id '{}'.", component.getName(), component.getUniqueId(), e);
+            return Either.right(ToscaError.GENERAL_ERROR);
+        }
+        if (!outputs.isEmpty()) {
+            topologyTemplate.setOutputs(outputs);
+        }
+        if (CollectionUtils.isNotEmpty(component.getComponentInstances())) {
+            final Either<Map<String, ToscaNodeTemplate>, ToscaError> nodeTemplates =
+                convertNodeTemplates(component, componentCache, dataTypes, topologyTemplate);
+            if (nodeTemplates.isRight()) {
+                return Either.right(nodeTemplates.right().value());
+            }
+            log.debug("node templates converted");
+            topologyTemplate.setNode_templates(nodeTemplates.left().value());
+        }
+        final Map<String, ToscaRelationshipTemplate> relationshipTemplatesMap = new ToscaExportRelationshipTemplatesHandler()
+            .createFrom(topologyTemplate.getNode_templates());
+        if (!relationshipTemplatesMap.isEmpty()) {
+            topologyTemplate.setRelationshipTemplates(relationshipTemplatesMap);
+        }
+        addGroupsToTopologyTemplate(component, topologyTemplate);
+        try {
+            addPoliciesToTopologyTemplate(component, topologyTemplate);
+        } catch (SdcResourceNotFoundException e) {
+            log.debug("Fail to add policies to topology template:", e);
+            return Either.right(ToscaError.GENERAL_ERROR);
+        }
+        try {
+            createSubstitutionMapping(component, componentCache).ifPresent(topologyTemplate::setSubstitution_mappings);
+        } catch (final ToscaExportException e) {
+            log.error(EcompLoggerErrorCode.BUSINESS_PROCESS_ERROR, ToscaExportHandler.class.getName(), e.getMessage());
+            return Either.right(e.getToscaError());
+        }
+        if (!topologyTemplate.isEmpty()) {
+            toscaNode.setTopology_template(topologyTemplate);
+        }
+        return Either.left(toscaNode);
+    }
+
+    private Either<String, ToscaError> createComponentToscaName(final Component component) {
+        switch (component.getComponentType()) {
+            case RESOURCE:
+                final ResourceMetadataDataDefinition resourceMetadata =
+                    (ResourceMetadataDataDefinition) component.getComponentMetadataDefinition().getMetadataDataDefinition();
+                return Either.left(resourceMetadata.getToscaResourceName());
+            case SERVICE:
+                return Either.left(SERVICE_NODE_TYPE_PREFIX + component.getComponentMetadataDefinition().getMetadataDataDefinition().getSystemName());
+            default:
+                log.debug(NOT_SUPPORTED_COMPONENT_TYPE, component.getComponentType());
+                return Either.right(ToscaError.NOT_SUPPORTED_TOSCA_TYPE);
+        }
+    }
+
+    private Optional<SubstitutionMapping> createSubstitutionMapping(final Component component,
+                                                                    final Map<String, Component> componentCache) throws ToscaExportException {
+        if (component instanceof Service && !((Service) component).isSubstituteCandidate()) {
+            return Optional.empty();
+        }
+
+        final Either<String, ToscaError> toscaResourceNameEither = createComponentToscaName(component);
+        if (toscaResourceNameEither.isRight()) {
+            throw new ToscaExportException("Could not create component TOSCA name", toscaResourceNameEither.right().value());
+        }
+        final String toscaResourceName = toscaResourceNameEither.left().value();
+
+        final SubstitutionMapping substitutionMapping = new SubstitutionMapping();
+        substitutionMapping.setNode_type(toscaResourceName);
+        convertSubstitutionMappingFilter(component).ifPresent(substitutionMapping::setSubstitution_filter);
+
+        final Either<Map<String, String[]>, ToscaError> capabilitiesEither = convertSubstitutionMappingCapabilities(component, componentCache);
+        if (capabilitiesEither.isRight()) {
+            throw new ToscaExportException("Could not convert substitution mapping capabilities", capabilitiesEither.right().value());
+        }
+        final Map<String, String[]> capabilityMap = capabilitiesEither.left().value();
+        if (!capabilityMap.isEmpty()) {
+            substitutionMapping.setCapabilities(capabilityMap);
+        }
+
+        final Either<Map<String, String[]>, ToscaError> requirements =
+            capabilityRequirementConverter.convertSubstitutionMappingRequirements(component, componentCache);
+        if (requirements.isRight()) {
+            throw new ToscaExportException("Could not convert substitution mapping requirements", requirements.right().value());
+        }
+        final Map<String, String[]> requirementMap = requirements.left().value();
+        if (MapUtils.isNotEmpty(requirementMap)) {
+            substitutionMapping.setRequirements(requirementMap);
+        }
+
+        final Map<String, String[]> propertyMappingMap = buildSubstitutionMappingPropertyMapping(component);
+        if (MapUtils.isNotEmpty(propertyMappingMap)) {
+            substitutionMapping.setProperties(propertyMappingMap);
+        }
+
+        final Map<String, String[]> attributesMappingMap = buildSubstitutionMappingAttributesMapping(component);
+        if (MapUtils.isNotEmpty(attributesMappingMap)) {
+            substitutionMapping.setAttributes(attributesMappingMap);
+        }
+
+        return Optional.of(substitutionMapping);
+    }
+
+    private Optional<NodeFilter> convertSubstitutionMappingFilter(final Component component) {
+        if (component.getSubstitutionFilter() == null || (component.getSubstitutionFilter().getProperties()).getListToscaDataDefinition() == null) {
+            return Optional.empty();
+        }
+
+        return Optional.ofNullable(convertToSubstitutionFilterComponent(component.getSubstitutionFilter()));
+    }
+
+    private void addGroupsToTopologyTemplate(Component component, ToscaTopolgyTemplate topologyTemplate) {
+        Map<String, ToscaGroupTemplate> groups = groupExportParser.getGroups(component);
+        if (groups != null) {
+            topologyTemplate.addGroups(groups);
+        }
+    }
+
+    private void addPoliciesToTopologyTemplate(Component component, ToscaTopolgyTemplate topologyTemplate) throws SdcResourceNotFoundException {
+        Map<String, ToscaPolicyTemplate> policies = policyExportParser.getPolicies(component);
+        if (policies != null) {
+            topologyTemplate.addPolicies(policies);
+        }
+    }
+
+    private Map<String, String> convertMetadata(Component component) {
+        return convertMetadata(component, false, null);
+    }
+
+    private Map<String, String> convertMetadata(Component component, boolean isInstance, ComponentInstance componentInstance) {
+        Map<String, String> toscaMetadata = new LinkedHashMap<>();
+        toscaMetadata.put(convertMetadataKey(JsonPresentationFields.INVARIANT_UUID), component.getInvariantUUID());
+        toscaMetadata.put(JsonPresentationFields.UUID.getPresentation(), component.getUUID());
+        toscaMetadata
+            .put(JsonPresentationFields.NAME.getPresentation(), component.getComponentMetadataDefinition().getMetadataDataDefinition().getName());
+        toscaMetadata.put(JsonPresentationFields.DESCRIPTION.getPresentation(), component.getDescription());
+        List<CategoryDefinition> categories = component.getCategories();
+        CategoryDefinition categoryDefinition = categories.get(0);
+        toscaMetadata.put(JsonPresentationFields.MODEL.getPresentation(), component.getModel());
+        toscaMetadata.put(JsonPresentationFields.CATEGORY.getPresentation(), categoryDefinition.getName());
+        if (isInstance) {
+            toscaMetadata.put(JsonPresentationFields.VERSION.getPresentation(), component.getVersion());
+            toscaMetadata.put(JsonPresentationFields.CUSTOMIZATION_UUID.getPresentation(), componentInstance.getCustomizationUUID());
+            if (componentInstance.getSourceModelInvariant() != null && !componentInstance.getSourceModelInvariant().isEmpty()) {
+                toscaMetadata.put(JsonPresentationFields.VERSION.getPresentation(), componentInstance.getComponentVersion());
+                toscaMetadata.put(JsonPresentationFields.CI_SOURCE_MODEL_INVARIANT.getPresentation(), componentInstance.getSourceModelInvariant());
+                toscaMetadata.put(JsonPresentationFields.CI_SOURCE_MODEL_UUID.getPresentation(), componentInstance.getSourceModelUuid());
+                toscaMetadata.put(JsonPresentationFields.CI_SOURCE_MODEL_NAME.getPresentation(), componentInstance.getSourceModelName());
+                if (componentInstance.getOriginType() == OriginTypeEnum.ServiceProxy) {
+                    toscaMetadata.put(JsonPresentationFields.NAME.getPresentation(),
+                        componentInstance.getSourceModelName() + " " + OriginTypeEnum.ServiceProxy.getDisplayValue());
+                } else if (componentInstance.getOriginType() == OriginTypeEnum.ServiceSubstitution) {
+                    toscaMetadata.put(JsonPresentationFields.NAME.getPresentation(),
+                        componentInstance.getSourceModelName() + " " + OriginTypeEnum.ServiceSubstitution.getDisplayValue());
+                }
+                toscaMetadata.put(JsonPresentationFields.DESCRIPTION.getPresentation(), componentInstance.getDescription());
+            }
+        }
+        switch (component.getComponentType()) {
+            case RESOURCE:
+                Resource resource = (Resource) component;
+                if (isInstance && (componentInstance.getOriginType() == OriginTypeEnum.ServiceProxy
+                    || componentInstance.getOriginType() == OriginTypeEnum.ServiceSubstitution)) {
+                    toscaMetadata.put(JsonPresentationFields.TYPE.getPresentation(), componentInstance.getOriginType().getDisplayValue());
+                } else {
+                    toscaMetadata.put(JsonPresentationFields.TYPE.getPresentation(), resource.getResourceType().name());
+                }
+                toscaMetadata.put(JsonPresentationFields.SUB_CATEGORY.getPresentation(), categoryDefinition.getSubcategories().get(0).getName());
+                toscaMetadata.put(JsonPresentationFields.RESOURCE_VENDOR.getPresentation(), resource.getVendorName());
+                toscaMetadata.put(JsonPresentationFields.RESOURCE_VENDOR_RELEASE.getPresentation(), resource.getVendorRelease());
+                toscaMetadata.put(JsonPresentationFields.RESOURCE_VENDOR_MODEL_NUMBER.getPresentation(), resource.getResourceVendorModelNumber());
+                break;
+            case SERVICE:
+                Service service = (Service) component;
+                toscaMetadata.put(JsonPresentationFields.TYPE.getPresentation(), component.getComponentType().getValue());
+                toscaMetadata.put(JsonPresentationFields.SERVICE_TYPE.getPresentation(), service.getServiceType());
+                toscaMetadata.put(JsonPresentationFields.SERVICE_ROLE.getPresentation(), service.getServiceRole());
+                toscaMetadata.put(JsonPresentationFields.SERVICE_FUNCTION.getPresentation(), service.getServiceFunction());
+                toscaMetadata.put(JsonPresentationFields.ENVIRONMENT_CONTEXT.getPresentation(), service.getEnvironmentContext());
+                toscaMetadata.put(JsonPresentationFields.INSTANTIATION_TYPE.getPresentation(),
+                    service.getEnvironmentContext() == null ? StringUtils.EMPTY : service.getInstantiationType());
+                if (!isInstance) {
+                    // DE268546
+                    toscaMetadata.put(JsonPresentationFields.ECOMP_GENERATED_NAMING.getPresentation(), service.isEcompGeneratedNaming().toString());
+                    toscaMetadata.put(JsonPresentationFields.ECOMP_GENERATED_NAMING.getPresentation(), service.isEcompGeneratedNaming().toString());
+                    toscaMetadata.put(JsonPresentationFields.NAMING_POLICY.getPresentation(), service.getNamingPolicy());
+                }
+                break;
+            default:
+                log.debug(NOT_SUPPORTED_COMPONENT_TYPE, component.getComponentType());
+        }
+        for (final String key : component.getCategorySpecificMetadata().keySet()) {
+            if (!EXCLUDED_CATEGORY_SPECIFIC_METADATA.contains(key)) {
+                toscaMetadata.put(key, component.getCategorySpecificMetadata().get(key));
+            }
+        }
+        return toscaMetadata;
+    }
+
+    private String convertMetadataKey(JsonPresentationFields jsonPresentationField) {
+        if (JsonPresentationFields.INVARIANT_UUID.equals(jsonPresentationField)) {
+            return INVARIANT_UUID;
+        }
+        return jsonPresentationField.getPresentation();
+    }
+
+    private Either<ImmutablePair<ToscaTemplate, Map<String, Component>>, ToscaError> fillImports(Component component, ToscaTemplate toscaTemplate) {
+        final List<Map<String, Map<String, String>>> defaultToscaImportConfig = getDefaultToscaImports(component.getModel());
+        if (CollectionUtils.isEmpty(defaultToscaImportConfig)) {
+            log.debug(FAILED_TO_GET_DEFAULT_IMPORTS_CONFIGURATION);
+            return Either.right(ToscaError.GENERAL_ERROR);
+        }
+        Map<String, Component> componentCache = new HashMap<>();
+        if (!ModelConverter.isAtomicComponent(component)) {
+            final List<Map<String, Map<String, String>>> additionalImports =
+                toscaTemplate.getImports() == null ? new ArrayList<>(defaultToscaImportConfig) : new ArrayList<>(toscaTemplate.getImports());
+            List<Triple<String, String, Component>> dependencies = new ArrayList<>();
+            Map<String, ArtifactDefinition> toscaArtifacts = component.getToscaArtifacts();
+            final Map<String, Map<String, String>> substituteTypeImportEntry = generateComponentSubstituteTypeImport(component, toscaArtifacts);
+            if (!substituteTypeImportEntry.isEmpty()) {
+                additionalImports.add(substituteTypeImportEntry);
+            }
+            List<ComponentInstance> componentInstances = component.getComponentInstances();
+            if (componentInstances != null && !componentInstances.isEmpty()) {
+                componentInstances.forEach(ci -> createDependency(componentCache, additionalImports, dependencies, ci));
+            }
+            toscaTemplate.setDependencies(dependencies);
+            toscaTemplate.setImports(additionalImports);
+        } else {
+            log.debug("currently imports supported for VF and service only");
+        }
+        return Either.left(new ImmutablePair<>(toscaTemplate, componentCache));
+    }
+
+    private Map<String, Map<String, String>> generateComponentSubstituteTypeImport(final Component component,
+                                                                                   final Map<String, ArtifactDefinition> toscaArtifacts) {
+
+        if (component instanceof Service && !((Service) component).isSubstituteCandidate()) {
+            return Collections.emptyMap();
+        }
+        if (MapUtils.isEmpty(toscaArtifacts)) {
+            return Collections.emptyMap();
+        }
+        final ArtifactDefinition artifactDefinition = toscaArtifacts.get(ASSET_TOSCA_TEMPLATE);
+        if (artifactDefinition == null) {
+            return Collections.emptyMap();
+        }
+        final var importEntryName = component.getComponentType().toString().toLowerCase() + "-" + component.getName() + "-interface";
+        return Map.of(importEntryName,
+            Map.of(IMPORTS_FILE_KEY, getInterfaceFilename(artifactDefinition.getArtifactName()))
+        );
+    }
+
+    private List<Map<String, Map<String, String>>> getDefaultToscaImportConfig() {
+        return getConfiguration().getDefaultImports();
+    }
+
+    private void createDependency(final Map<String, Component> componentCache, final List<Map<String, Map<String, String>>> imports,
+                                  final List<Triple<String, String, Component>> dependencies, final ComponentInstance componentInstance) {
+        log.debug("createDependency componentCache {}", componentCache);
+        Component componentRI = componentCache.get(componentInstance.getComponentUid());
+        if (componentRI == null || componentInstance.getOriginType() == OriginTypeEnum.ServiceSubstitution) {
+            // all resource must be only once!
+            final Either<Component, StorageOperationStatus> resource = toscaOperationFacade.getToscaFullElement(componentInstance.getComponentUid());
+            if ((resource.isRight()) && (log.isDebugEnabled())) {
+                log.debug("Failed to fetch resource with id {} for instance {}", componentInstance.getComponentUid(),
+                    componentInstance.getUniqueId());
+                return;
+            }
+            final Component fetchedComponent = resource.left().value();
+            componentRI = setComponentCache(componentCache, componentInstance, fetchedComponent);
+            addDependencies(imports, dependencies, componentRI);
+        }
+    }
+
+    /**
+     * Sets a componentCache from the given component/resource.
+     */
+    private Component setComponentCache(final Map<String, Component> componentCache, final ComponentInstance componentInstance,
+                                        final Component fetchedComponent) {
+        componentCache.put(fetchedComponent.getUniqueId(), fetchedComponent);
+        if (componentInstance.getOriginType() == OriginTypeEnum.ServiceProxy
+            || componentInstance.getOriginType() == OriginTypeEnum.ServiceSubstitution) {
+            final Either<Component, StorageOperationStatus> sourceService = toscaOperationFacade
+                .getToscaFullElement(componentInstance.getSourceModelUid());
+            if (sourceService.isRight() && (log.isDebugEnabled())) {
+                log.debug("Failed to fetch source service with id {} for proxy {}", componentInstance.getSourceModelUid(),
+                    componentInstance.getUniqueId());
+            }
+            final Component fetchedSource = sourceService.left().value();
+            componentCache.put(fetchedSource.getUniqueId(), fetchedSource);
+            return fetchedSource;
+        }
+        return fetchedComponent;
+    }
+
+    /**
+     * Retrieves all derived_from nodes and stores it in a predictable order.
+     */
+    private void addDependencies(final List<Map<String, Map<String, String>>> imports, final List<Triple<String, String, Component>> dependencies,
+                                 final Component fetchedComponent) {
+        final Set<Component> componentsList = new LinkedHashSet<>();
+        if (fetchedComponent instanceof Resource) {
+            log.debug("fetchedComponent is a resource {}", fetchedComponent);
+            final Optional<Map<String, String>> derivedFromMapOfIdToName = getDerivedFromMapOfIdToName(fetchedComponent, componentsList);
+            if (derivedFromMapOfIdToName.isPresent() && !derivedFromMapOfIdToName.get().isEmpty()) {
+                derivedFromMapOfIdToName.get().entrySet().forEach(entry -> {
+                    log.debug("Started entry.getValue() : {}", entry.getValue());
+                    if (!NATIVE_ROOT.equals(entry.getValue())) {
+                        Either<Resource, StorageOperationStatus> resourcefetched = toscaOperationFacade.getToscaElement(entry.getKey());
+                        if (resourcefetched != null && resourcefetched.isLeft()) {
+                            componentsList.add(resourcefetched.left().value());
+                        }
+                    }
+                });
+                setImports(imports, dependencies, componentsList);
+            } else {
+                setImports(imports, dependencies, fetchedComponent);
+            }
+        }
+    }
+
+    /**
+     * Returns all derived_from nodes found.
+     */
+    private Optional<Map<String, String>> getDerivedFromMapOfIdToName(final Component fetchedComponent, final Set<Component> componentsList) {
+        final Resource parentResource = (Resource) fetchedComponent;
+        Map<String, String> derivedFromMapOfIdToName = new HashMap<>();
+        if (CollectionUtils.isNotEmpty(parentResource.getComponentInstances())) {
+            componentsList.add(fetchedComponent);
+            for (final ComponentInstance componentInstance : parentResource.getComponentInstances()) {
+                final Either<Resource, StorageOperationStatus> resourcefetched = toscaOperationFacade
+                    .getToscaElement(componentInstance.getComponentUid());
+                if (resourcefetched != null && resourcefetched.isLeft()) {
+                    final Map<String, String> derivedWithId = resourcefetched.left().value().getDerivedFromMapOfIdToName();
+                    if (MapUtils.isNotEmpty(derivedWithId)) {
+                        derivedFromMapOfIdToName.putAll(derivedWithId);
+                    }
+                }
+            }
+        } else {
+            derivedFromMapOfIdToName = parentResource.getDerivedFromMapOfIdToName();
+        }
+        log.debug("Started derivedFromMapOfIdToName: {}", derivedFromMapOfIdToName);
+        return Optional.ofNullable(derivedFromMapOfIdToName);
+    }
+
+    /**
+     * Creates a resource map and adds it to the import list.
+     */
+    private void setImports(final List<Map<String, Map<String, String>>> imports, final List<Triple<String, String, Component>> dependencies,
+                            final Set<Component> componentsList) {
+        componentsList.forEach(component -> setImports(imports, dependencies, component));
+    }
+
+    private void setImports(final List<Map<String, Map<String, String>>> imports, final List<Triple<String, String, Component>> dependencies,
+                            final Component component) {
+        final Map<String, ArtifactDefinition> toscaArtifacts = component.getToscaArtifacts();
+        final ArtifactDefinition artifactDefinition = toscaArtifacts.get(ASSET_TOSCA_TEMPLATE);
+        if (artifactDefinition != null) {
+            final Map<String, String> files = new HashMap<>();
+            final String artifactName = artifactDefinition.getArtifactName();
+            files.put(IMPORTS_FILE_KEY, artifactName);
+            final StringBuilder keyNameBuilder = new StringBuilder();
+            keyNameBuilder.append(component.getComponentType().toString().toLowerCase());
+            keyNameBuilder.append("-");
+            keyNameBuilder.append(component.getName());
+            addImports(imports, keyNameBuilder, files);
+            dependencies.add(new ImmutableTriple<>(artifactName, artifactDefinition.getEsId(), component));
+            if (!ModelConverter.isAtomicComponent(component)) {
+                final Map<String, String> interfaceFiles = new HashMap<>();
+                interfaceFiles.put(IMPORTS_FILE_KEY, getInterfaceFilename(artifactName));
+                keyNameBuilder.append("-interface");
+                addImports(imports, keyNameBuilder, interfaceFiles);
+            }
+        }
+    }
+
+    /**
+     * Adds the found resource to the import definition list.
+     */
+    private void addImports(final List<Map<String, Map<String, String>>> imports, final StringBuilder keyNameBuilder,
+                            final Map<String, String> files) {
+        final String mapKey = keyNameBuilder.toString();
+        if (imports.stream().allMatch(stringMapMap -> stringMapMap.get(mapKey) == null)) {
+            final Map<String, Map<String, String>> importsListMember = new HashMap<>();
+            importsListMember.put(keyNameBuilder.toString(), files);
+            imports.add(importsListMember);
+        }
+    }
+
+    private Either<ToscaTemplate, ToscaError> convertNodeType(Map<String, Component> componentsCache, Component component, ToscaTemplate toscaNode,
+                                                              Map<String, ToscaNodeType> nodeTypes) {
+        return convertInterfaceNodeType(componentsCache, component, toscaNode, nodeTypes, false);
+    }
+
+    public Either<ToscaTemplate, ToscaError> convertInterfaceNodeType(Map<String, Component> componentsCache, Component component,
+                                                                      ToscaTemplate toscaNode, Map<String, ToscaNodeType> nodeTypes,
+                                                                      boolean isAssociatedComponent) {
+        log.debug("start convert node type for {}", component.getUniqueId());
+        ToscaNodeType toscaNodeType = createNodeType(component);
+        Either<Map<String, InterfaceDefinition>, StorageOperationStatus> lifecycleTypeEither = interfaceLifecycleOperation
+            .getAllInterfaceLifecycleTypes(component.getModel());
+        if (lifecycleTypeEither.isRight() && !StorageOperationStatus.NOT_FOUND.equals(lifecycleTypeEither.right().value())) {
+            log.debug("Failed to fetch all interface types :", lifecycleTypeEither.right().value());
+            return Either.right(ToscaError.GENERAL_ERROR);
+        }
+        if (lifecycleTypeEither.isLeft()) {
+            List<String> allGlobalInterfaceTypes = lifecycleTypeEither.left().value().values().stream().map(InterfaceDataDefinition::getType)
+                .collect(Collectors.toList());
+            toscaNode.setInterface_types(interfacesOperationsConverter.addInterfaceTypeElement(component, allGlobalInterfaceTypes));
+        }
+        final var dataTypesEither = applicationDataTypeCache.getAll(component.getModel());
+        if (dataTypesEither.isRight()) {
+            log.debug("Failed to fetch all data types :", dataTypesEither.right().value());
+            return Either.right(ToscaError.GENERAL_ERROR);
+        }
+        Map<String, DataTypeDefinition> dataTypes = dataTypesEither.left().value();
+        List<InputDefinition> inputDef = component.getInputs();
+        interfacesOperationsConverter.addInterfaceDefinitionElement(component, toscaNodeType, dataTypes, isAssociatedComponent);
+        final var toscaAttributeMap = convertToToscaAttributes(component.getAttributes(), dataTypes);
+        if (!toscaAttributeMap.isEmpty()) {
+            toscaNodeType.setAttributes(toscaAttributeMap);
+        }
+        final var mergedProperties = convertInputsToProperties(dataTypes, inputDef, component.getUniqueId());
+        if (CollectionUtils.isNotEmpty(component.getProperties())) {
+            List<PropertyDefinition> properties = component.getProperties();
+            Map<String, ToscaProperty> convertedProperties = properties.stream()
+                .map(propertyDefinition -> resolvePropertyValueFromInput(propertyDefinition, component.getInputs()))
+                .collect(Collectors.toMap(PropertyDataDefinition::getName,
+                    property -> propertyConvertor.convertProperty(dataTypes, property, PropertyConvertor.PropertyType.PROPERTY)));
+            // merge component properties and inputs properties
+            convertedProperties.forEach((k, v) -> mergedProperties.putIfAbsent(k, v));
+        }
+        if (MapUtils.isNotEmpty(mergedProperties)) {
+            toscaNodeType.setProperties(mergedProperties);
+        }
+        /* convert private data_types */
+        List<DataTypeDefinition> privateDataTypes = component.getDataTypes();
+        if (CollectionUtils.isNotEmpty(privateDataTypes)) {
+            Map<String, ToscaDataType> toscaDataTypeMap = new HashMap<>();
+            for (DataTypeDefinition dataType : privateDataTypes) {
+                log.debug("Emitting private data type: component.name={} dataType.name={}",
+                    component.getNormalizedName(), dataType.getName());
+                ToscaDataType toscaDataType = new ToscaDataType();
+                toscaDataType.setDerived_from(dataType.getDerivedFromName());
+                toscaDataType.setDescription(dataType.getDescription());
+                toscaDataType.setVersion(dataType.getVersion());
+                if (CollectionUtils.isNotEmpty(dataType.getProperties())) {
+                    toscaDataType.setProperties(dataType.getProperties().stream()
+                        .collect(Collectors.toMap(
+                            PropertyDataDefinition::getName,
+                            s -> propertyConvertor.convertProperty(dataTypes, s, PropertyType.PROPERTY),
+                            (toscaPropertyTobeValidated, toscaProperty) -> validateToscaProperty(privateDataTypes, toscaPropertyTobeValidated,
+                                toscaProperty)
+                        )));
+                }
+                toscaDataTypeMap.put(dataType.getName(), toscaDataType);
+            }
+            toscaNode.setData_types(toscaDataTypeMap);
+        }
+
+        // Extracted to method for code reuse
+        return convertReqCapAndTypeName(componentsCache, component, toscaNode, nodeTypes, toscaNodeType, dataTypes);
+    }
+
+    private ToscaProperty validateToscaProperty(final List<DataTypeDefinition> privateDataTypes, final ToscaProperty toscaPropertyTobeValidated,
+                                                final ToscaProperty toscaProperty) {
+        final Optional<DataTypeDefinition> match = privateDataTypes.stream()
+            .filter(dataType -> dataType.getName().equals(toscaPropertyTobeValidated.getType())).findFirst();
+        return match.isPresent() ? toscaPropertyTobeValidated : toscaProperty;
+    }
+
+    private Map<String, ToscaAttribute> convertToToscaAttributes(final List<AttributeDefinition> attributeList,
+                                                                 final Map<String, DataTypeDefinition> dataTypes) {
+        if (CollectionUtils.isEmpty(attributeList)) {
+            return Collections.emptyMap();
+        }
+        final AttributeConverter converter = new AttributeConverter(dataTypes);
+        final Map<String, ToscaAttribute> toscaAttributeMap = new HashMap<>();
+        for (final AttributeDefinition attributeDefinition : attributeList) {
+            toscaAttributeMap.put(attributeDefinition.getName(), converter.convert(attributeDefinition));
+        }
+        return toscaAttributeMap;
+    }
+
+    private Either<ToscaTemplate, ToscaError> convertReqCapAndTypeName(Map<String, Component> componentsCache,
+                                                                       Component component, ToscaTemplate toscaNode,
+                                                                       Map<String, ToscaNodeType> nodeTypes,
+                                                                       ToscaNodeType toscaNodeType,
+                                                                       Map<String, DataTypeDefinition> dataTypes) {
+        Either<ToscaNodeType, ToscaError> capabilities = convertCapabilities(componentsCache, component, toscaNodeType,
+            dataTypes);
+        if (capabilities.isRight()) {
+            return Either.right(capabilities.right().value());
+        }
+        toscaNodeType = capabilities.left().value();
+        log.debug("Capabilities converted for {}", component.getUniqueId());
+
+        Either<ToscaNodeType, ToscaError> requirements = capabilityRequirementConverter
+            .convertRequirements(componentsCache, component, toscaNodeType);
+        if (requirements.isRight()) {
+            return Either.right(requirements.right().value());
+        }
+        toscaNodeType = requirements.left().value();
+        log.debug("Requirements converted for {}", component.getUniqueId());
+
+        String toscaResourceName;
+        switch (component.getComponentType()) {
+            case RESOURCE:
+                toscaResourceName = ((ResourceMetadataDataDefinition) component.getComponentMetadataDefinition()
+                    .getMetadataDataDefinition()).getToscaResourceName();
+                break;
+            case SERVICE:
+                toscaResourceName = SERVICE_NODE_TYPE_PREFIX
+                    + component.getComponentMetadataDefinition().getMetadataDataDefinition().getSystemName();
+                break;
+            default:
+                log.debug(NOT_SUPPORTED_COMPONENT_TYPE, component.getComponentType());
+                return Either.right(ToscaError.NOT_SUPPORTED_TOSCA_TYPE);
+        }
+
+        nodeTypes.put(toscaResourceName, toscaNodeType);
+        toscaNode.setNode_types(nodeTypes);
+        log.debug("finish convert node type for {}", component.getUniqueId());
+        return Either.left(toscaNode);
+    }
+
+    private Either<Map<String, ToscaNodeTemplate>, ToscaError> convertNodeTemplates(final Component component,
+                                                                                    final Map<String, Component> componentCache,
+                                                                                    final Map<String, DataTypeDefinition> dataTypes,
+                                                                                    final ToscaTopolgyTemplate topologyTemplate) {
+
+        final Map<String, List<ComponentInstanceProperty>> componentInstancesProperties = component.getComponentInstancesProperties();
+        final Map<String, List<ComponentInstanceAttribute>> componentInstancesAttributes = component.getComponentInstancesAttributes();
+        final Map<String, List<ComponentInstanceInput>> componentInstancesInputs = component.getComponentInstancesInputs();
+        final Map<String, List<ComponentInstanceInterface>> componentInstanceInterfaces = component.getComponentInstancesInterfaces();
+        final List<RequirementCapabilityRelDef> componentInstancesRelations = component.getComponentInstancesRelations();
+
+        Either<Map<String, ToscaNodeTemplate>, ToscaError> convertNodeTemplatesRes = null;
+        log.debug("start convert topology template for {} for type {}", component.getUniqueId(), component.getComponentType());
+        final Map<String, ToscaNodeTemplate> nodeTemplates = new HashMap<>();
+
+        Map<String, ToscaGroupTemplate> groupsMap = null;
+        for (final ComponentInstance componentInstance : component.getComponentInstances()) {
+            ToscaNodeTemplate nodeTemplate = new ToscaNodeTemplate();
+            if (MapUtils.isNotEmpty(componentInstance.getToscaArtifacts())) {
+                nodeTemplate.setArtifacts(convertToNodeTemplateArtifacts(componentInstance.getToscaArtifacts()));
+            }
+            if (componentInstance.getMinOccurrences() != null && componentInstance.getMaxOccurrences() != null) {
+                List<Object> occur = new ArrayList<>();
+                occur.add(parseToIntIfPossible(componentInstance.getMinOccurrences()));
+                occur.add(parseToIntIfPossible(componentInstance.getMaxOccurrences()));
+                nodeTemplate.setOccurrences(occur);
+            }
+            if (componentInstance.getInstanceCount() != null) {
+                ObjectMapper objectMapper = new ObjectMapper();
+                Object obj = convertToToscaObject(componentInstance.getInstanceCount());
+                if (obj != null) {
+                    Map<String, String> map = objectMapper.convertValue(obj, Map.class);
+                    nodeTemplate.setInstance_count(map);
+                }
+            }
+            nodeTemplate.setType(componentInstance.getToscaComponentName());
+            nodeTemplate.setDirectives(componentInstance.getDirectives());
+            NodeFilter nodeFilter = convertToNodeTemplateNodeFilterComponent(componentInstance.getNodeFilter());
+            if (nodeFilter != null && nodeFilter.hasData()) {
+                nodeTemplate.setNode_filter(nodeFilter);
+            }
+            final Either<Component, Boolean> originComponentRes = capabilityRequirementConverter
+                .getOriginComponent(componentCache, componentInstance);
+            if (originComponentRes.isRight()) {
+                convertNodeTemplatesRes = Either.right(ToscaError.NODE_TYPE_REQUIREMENT_ERROR);
+                break;
+            }
+            final Either<ToscaNodeTemplate, ToscaError> requirements = convertComponentInstanceRequirements(component, componentInstance,
+                componentInstancesRelations, nodeTemplate, originComponentRes.left().value(), componentCache);
+            if (requirements.isRight()) {
+                convertNodeTemplatesRes = Either.right(requirements.right().value());
+                break;
+            }
+            final String instanceUniqueId = componentInstance.getUniqueId();
+            log.debug("Component instance Requirements converted for instance {}", instanceUniqueId);
+
+            nodeTemplate = requirements.left().value();
+
+            final Component originalComponent = componentCache.get(componentInstance.getActualComponentUid());
+
+            if (componentInstance.getOriginType() == OriginTypeEnum.ServiceProxy) {
+                final Component componentOfProxy = componentCache.get(componentInstance.getComponentUid());
+                nodeTemplate.setMetadata(convertMetadata(componentOfProxy, true, componentInstance));
+            } else {
+                nodeTemplate.setMetadata(convertMetadata(originalComponent, true, componentInstance));
+            }
+
+            final Either<ToscaNodeTemplate, ToscaError> capabilities =
+                capabilityRequirementConverter.convertComponentInstanceCapabilities(componentInstance, dataTypes, nodeTemplate);
+            if (capabilities.isRight()) {
+                convertNodeTemplatesRes = Either.right(capabilities.right().value());
+                break;
+            }
+            log.debug("Component instance Capabilities converted for instance {}", instanceUniqueId);
+
+            nodeTemplate = capabilities.left().value();
+            final Map<String, Object> props = new HashMap<>();
+            final Map<String, Object> attribs = new HashMap<>();
+
+            if (originalComponent.getComponentType() == ComponentTypeEnum.RESOURCE) {
+                // Adds the properties of parent component to map
+                addPropertiesOfParentComponent(dataTypes, originalComponent, props);
+                addAttributesOfParentComponent(originalComponent, attribs);
+            }
+
+            if (null != componentInstancesProperties && componentInstancesProperties.containsKey(instanceUniqueId)) {
+                addPropertiesOfComponentInstance(componentInstancesProperties, dataTypes, instanceUniqueId, props);
+            }
+            if (null != componentInstancesAttributes && componentInstancesAttributes.containsKey(instanceUniqueId)) {
+                addAttributesOfComponentInstance(componentInstancesAttributes, instanceUniqueId, attribs);
+            }
+
+            if (componentInstancesInputs != null
+                && componentInstancesInputs.containsKey(instanceUniqueId)
+                && !isComponentOfTypeServiceProxy(componentInstance)) {
+                //For service proxy the inputs are already handled under instance properties above
+                addComponentInstanceInputs(dataTypes, componentInstancesInputs, instanceUniqueId, props);
+            }
+
+            //M3[00001] - NODE TEMPLATE INTERFACES  - START
+            handleInstanceInterfaces(componentInstanceInterfaces, componentInstance, dataTypes, nodeTemplate, instanceUniqueId, component);
+            //M3[00001] - NODE TEMPLATE INTERFACES  - END
+            if (MapUtils.isNotEmpty(props)) {
+                nodeTemplate.setProperties(props);
+            }
+            if (MapUtils.isNotEmpty(attribs)) {
+                nodeTemplate.setAttributes(attribs);
+            }
+
+            final List<GroupInstance> groupInstances = componentInstance.getGroupInstances();
+            if (CollectionUtils.isNotEmpty(groupInstances)) {
+                if (groupsMap == null) {
+                    groupsMap = new HashMap<>();
+                }
+                for (final GroupInstance groupInst : groupInstances) {
+                    if (CollectionUtils.isNotEmpty(groupInst.getArtifacts())) {
+                        groupsMap.put(groupInst.getName(), groupExportParser.getToscaGroupTemplate(groupInst, componentInstance.getInvariantName()));
+                    }
+                }
+            }
+
+            nodeTemplates.put(componentInstance.getName(), nodeTemplate);
+        }
+        if (groupsMap != null) {
+            log.debug("instance groups added");
+            topologyTemplate.addGroups(groupsMap);
+        }
+        if (component.getComponentType() == ComponentTypeEnum.SERVICE && isNotEmpty(
+            ((Service) component).getForwardingPaths())) {
+            log.debug("Starting converting paths for component {}, name {}", component.getUniqueId(), component.getName());
+            ForwardingPathToscaUtil
+                .addForwardingPaths((Service) component, nodeTemplates, capabilityRequirementConverter, componentCache, toscaOperationFacade);
+            log.debug("Finished converting paths for component {}, name {}", component.getUniqueId(), component.getName());
+        }
+        if (convertNodeTemplatesRes == null) {
+            convertNodeTemplatesRes = Either.left(nodeTemplates);
+        }
+        log.debug("finish convert topology template for {} for type {}", component.getUniqueId(), component.getComponentType());
+        return convertNodeTemplatesRes;
+    }
+
+    private Object convertToToscaObject(String value) {
+        try {
+            ToscaMapValueConverter mapConverterInst = ToscaMapValueConverter.getInstance();
+            StringReader reader = new StringReader(value);
+            JsonReader jsonReader = new JsonReader(reader);
+            jsonReader.setLenient(true);
+            JsonElement jsonElement = JsonParser.parseReader(jsonReader);
+            if (jsonElement.isJsonObject()) {
+                JsonObject jsonObj = jsonElement.getAsJsonObject();
+                if (jsonObj.entrySet().size() == 1 && jsonObj.has(ToscaFunctions.GET_INPUT.getFunctionName())) {
+                    return mapConverterInst.handleComplexJsonValue(jsonElement);
+                }
+            }
+            return null;
+        } catch (Exception e) {
+            log.debug("convertToToscaValue failed to parse json value :", e);
+            return null;
+        }
+    }
+
+    private Object parseToIntIfPossible(final String value) {
+        final Integer intValue = Ints.tryParse(value);
+        return intValue == null ? value : intValue;
+    }
+
+    private void handleInstanceInterfaces(
+        Map<String, List<ComponentInstanceInterface>> componentInstanceInterfaces,
+        ComponentInstance componentInstance, Map<String, DataTypeDefinition> dataTypes, ToscaNodeTemplate nodeTemplate,
+        String instanceUniqueId,
+        Component parentComponent) {
+
+        if (MapUtils.isEmpty(componentInstanceInterfaces)
+            || !componentInstanceInterfaces.containsKey(instanceUniqueId)) {
+            nodeTemplate.setInterfaces(null);
+            return;
+        }
+
+        final List<ComponentInstanceInterface> currServiceInterfaces =
+            componentInstanceInterfaces.get(instanceUniqueId);
+
+        final Map<String, InterfaceDefinition> tmpInterfaces = new HashMap<>();
+        currServiceInterfaces.forEach(instInterface -> tmpInterfaces.put(instInterface
+            .getUniqueId(), instInterface));
+
+        final Map<String, Object> interfaceMap = interfacesOperationsConverter
+            .getInterfacesMap(parentComponent, componentInstance, tmpInterfaces, dataTypes, isComponentOfTypeServiceProxy(componentInstance),
+                isComponentOfTypeServiceProxy(componentInstance));
+
+        interfacesOperationsConverter.removeInterfacesWithoutOperations(interfaceMap);
+        nodeTemplate.setInterfaces(MapUtils.isEmpty(interfaceMap) ? null : interfaceMap);
+    }
+
+    private boolean isComponentOfTypeServiceProxy(ComponentInstance componentInstance) {
+        return Objects.nonNull(componentInstance.getOriginType())
+            && componentInstance.getOriginType().getValue().equals("Service Proxy");
+    }
+
+    private void addComponentInstanceInputs(Map<String, DataTypeDefinition> dataTypes,
+                                            Map<String, List<ComponentInstanceInput>> componentInstancesInputs,
+                                            String instanceUniqueId, Map<String, Object> props) {
+
+        List<ComponentInstanceInput> instanceInputsList = componentInstancesInputs.get(instanceUniqueId);
+        if (instanceInputsList != null) {
+            instanceInputsList.forEach(input -> {
+                Supplier<String> supplier = () -> input.getValue() != null && !Objects.isNull(input.getValue()) ? input.getValue()
+                    : input.getDefaultValue();
+                propertyConvertor.convertAndAddValue(dataTypes, props, input, supplier);
+            });
+        }
+    }
+
+    private void addPropertiesOfComponentInstance(final Map<String, List<ComponentInstanceProperty>> componentInstancesProperties,
+                                                  final Map<String, DataTypeDefinition> dataTypes,
+                                                  final String instanceUniqueId,
+                                                  final Map<String, Object> props) {
+
+        if (isNotEmpty(componentInstancesProperties)) {
+            componentInstancesProperties.get(instanceUniqueId)
+                // Converts and adds each value to property map
+                .forEach(prop -> propertyConvertor.convertAndAddValue(dataTypes, props, prop, prop::getValue));
+        }
+    }
+
+    private void addAttributesOfComponentInstance(final Map<String, List<ComponentInstanceAttribute>> componentInstancesAttributes,
+                                                  final String instanceUniqueId,
+                                                  final Map<String, Object> attribs) {
+
+        if (isNotEmpty(componentInstancesAttributes) && componentInstancesAttributes.containsKey(instanceUniqueId)) {
+            componentInstancesAttributes.get(instanceUniqueId)
+                .forEach(attributeDefinition -> attributeConverter.convertAndAddValue(attribs, attributeDefinition));
+        }
+    }
+
+    private void addPropertiesOfParentComponent(Map<String, DataTypeDefinition> dataTypes,
+                                                Component componentOfInstance, Map<String, Object> props) {
+
+        List<PropertyDefinition> componentProperties = componentOfInstance.getProperties();
+        if (isNotEmpty(componentProperties)) {
+            componentProperties.stream()
+                // Filters out properties with empty default values
+                .filter(prop -> StringUtils.isNotEmpty(prop.getDefaultValue()))
+                // Converts and adds each value to property map
+                .forEach(prop -> propertyConvertor.convertAndAddValue(dataTypes, props, prop, prop::getDefaultValue));
+        }
+    }
+
+    private void addAttributesOfParentComponent(final Component componentOfInstance, final Map<String, Object> attribs) {
+
+        final List<AttributeDefinition> componentAttributes = componentOfInstance.getAttributes();
+        if (isNotEmpty(componentAttributes)) {
+            componentAttributes.stream()
+                // Filters out Attributes with empty default values
+                .filter(attrib -> StringUtils.isNotEmpty(attrib.getDefaultValue()))
+                // Converts and adds each value to attribute map
+                .forEach(attributeDefinition -> attributeConverter.convertAndAddValue(attribs, attributeDefinition));
+        }
+    }
+
+    private ToscaNodeType createNodeType(Component component) {
+        ToscaNodeType toscaNodeType = new ToscaNodeType();
+        if (ModelConverter.isAtomicComponent(component)) {
+            if (((Resource) component).getDerivedFrom() != null) {
+                toscaNodeType.setDerived_from(((Resource) component).getDerivedFrom().get(0));
+            }
+            toscaNodeType.setDescription(component.getDescription());
+        } else {
+            String derivedFrom = null != component.getDerivedFromGenericType() ? component.getDerivedFromGenericType()
+                : NATIVE_ROOT;
+            toscaNodeType.setDerived_from(derivedFrom);
+        }
+        return toscaNodeType;
+    }
+
+    private Either<Map<String, Object>, ToscaError> createProxyInterfaceTypes(Component container) {
+
+        Map<String, Object> proxyInterfaceTypes = new HashMap<>();
+        Either<Map<String, Object>, ToscaError> res = Either.left(proxyInterfaceTypes);
+        List<ComponentInstance> componentInstances = container.getComponentInstances();
+        if (CollectionUtils.isEmpty(componentInstances)) {
+            return res;
+        }
+        Map<String, ComponentInstance> serviceProxyInstanceList = new HashMap<>();
+        componentInstances.stream()
+            .filter(this::isComponentOfTypeServiceProxy)
+            .forEach(inst -> serviceProxyInstanceList.put(inst.getToscaComponentName(), inst));
+        if (MapUtils.isEmpty(serviceProxyInstanceList)) {
+            return res;
+        }
+        for (Entry<String, ComponentInstance> entryProxy : serviceProxyInstanceList.entrySet()) {
+            Component serviceComponent;
+            ComponentParametersView componentParametersView = new ComponentParametersView();
+            componentParametersView.disableAll();
+            componentParametersView.setIgnoreInterfaces(false);
+            Either<Component, StorageOperationStatus> service = toscaOperationFacade
+                .getToscaElement(entryProxy.getValue().getSourceModelUid(), componentParametersView);
+            if (service.isRight()) {
+                log.debug("Failed to fetch original service component with id {} for instance {}",
+                    entryProxy.getValue().getSourceModelUid(), entryProxy.getValue().getName());
+                return Either.right(ToscaError.GENERAL_ERROR);
+            } else {
+                serviceComponent = service.left().value();
+            }
+
+            Either<Map<String, InterfaceDefinition>, StorageOperationStatus> lifecycleTypeEither =
+                interfaceLifecycleOperation.getAllInterfaceLifecycleTypes(serviceComponent.getModel());
+            if (lifecycleTypeEither.isRight()) {
+                log.debug("Failed to retrieve global interface types :", lifecycleTypeEither.right().value());
+                return Either.right(ToscaError.GENERAL_ERROR);
+            }
+
+            List<String> allGlobalInterfaceTypes = lifecycleTypeEither.left().value().values().stream()
+                .map(InterfaceDataDefinition::getType)
+                .collect(Collectors.toList());
+            //Add interface types for local interfaces in the original service component for proxy
+            Map<String, Object> localInterfaceTypes = interfacesOperationsConverter.addInterfaceTypeElement(serviceComponent,
+                allGlobalInterfaceTypes);
+            if (MapUtils.isNotEmpty(localInterfaceTypes)) {
+                proxyInterfaceTypes.putAll(localInterfaceTypes);
+            }
+
+        }
+        return Either.left(proxyInterfaceTypes);
+    }
+
+    private Either<Map<String, ToscaNodeType>, ToscaError> createProxyNodeTypes(Map<String, Component> componentCache,
+                                                                                Component container) {
+
+        Map<String, ToscaNodeType> nodeTypesMap = new HashMap<>();
+        Either<Map<String, ToscaNodeType>, ToscaError> res = Either.left(nodeTypesMap);
+
+        List<ComponentInstance> componentInstances = container.getComponentInstances();
+
+        if (componentInstances == null || componentInstances.isEmpty()) {
+            return res;
+        }
+        Map<String, ComponentInstance> serviceProxyInstanceList = new HashMap<>();
+        List<ComponentInstance> proxyInst = componentInstances.stream()
+            .filter(p -> p.getOriginType().name().equals(OriginTypeEnum.ServiceProxy.name()))
+            .collect(Collectors.toList());
+        if (proxyInst != null && !proxyInst.isEmpty()) {
+            for (ComponentInstance inst : proxyInst) {
+                serviceProxyInstanceList.put(inst.getToscaComponentName(), inst);
+            }
+        }
+
+        if (serviceProxyInstanceList.isEmpty()) {
+            return res;
+        }
+        Either<Resource, StorageOperationStatus> serviceProxyOrigin = toscaOperationFacade
+            .getLatestByName("serviceProxy", null);
+        if (serviceProxyOrigin.isRight()) {
+            log.debug("Failed to fetch normative service proxy resource by tosca name, error {}",
+                serviceProxyOrigin.right().value());
+            return Either.right(ToscaError.NOT_SUPPORTED_TOSCA_TYPE);
+        }
+        Component origComponent = serviceProxyOrigin.left().value();
+
+        for (Entry<String, ComponentInstance> entryProxy : serviceProxyInstanceList.entrySet()) {
+            Component serviceComponent = null;
+            ComponentParametersView componentParametersView = new ComponentParametersView();
+            componentParametersView.disableAll();
+            componentParametersView.setIgnoreCategories(false);
+            componentParametersView.setIgnoreProperties(false);
+            componentParametersView.setIgnoreInputs(false);
+            componentParametersView.setIgnoreInterfaces(false);
+            componentParametersView.setIgnoreRequirements(false);
+            Either<Component, StorageOperationStatus> service = toscaOperationFacade
+                .getToscaElement(entryProxy.getValue().getSourceModelUid(), componentParametersView);
+            if (service.isRight()) {
+                log.debug("Failed to fetch resource with id {} for instance {}",
+                    entryProxy.getValue().getSourceModelUid(), entryProxy.getValue().getName());
+            } else {
+                serviceComponent = service.left().value();
+            }
+
+            ToscaNodeType toscaNodeType = createProxyNodeType(componentCache, origComponent, serviceComponent,
+                entryProxy.getValue());
+            nodeTypesMap.put(entryProxy.getKey(), toscaNodeType);
+        }
+
+        return Either.left(nodeTypesMap);
+    }
+
+    private void createServiceSubstitutionNodeTypes(final Map<String, Component> componentCache,
+                                                    final Component container, final ToscaTemplate toscaNode) {
+        final List<ComponentInstance> componentInstances = container.getComponentInstances();
+
+        if (CollectionUtils.isEmpty(componentInstances)) {
+            return;
+        }
+        final List<ComponentInstance> serviceSubstitutionInstanceList = componentInstances.stream()
+            .filter(p -> p.getOriginType().name().equals(OriginTypeEnum.ServiceSubstitution.name()))
+            .collect(Collectors.toList());
+        if (CollectionUtils.isNotEmpty(serviceSubstitutionInstanceList)) {
+            for (ComponentInstance inst : serviceSubstitutionInstanceList) {
+                final Map<String, ToscaNodeType> nodeTypes =
+                    toscaNode.getNode_types() == null ? new HashMap<>() : toscaNode.getNode_types();
+                convertInterfaceNodeType(new HashMap<>(), componentCache.get(inst.getSourceModelUid()), toscaNode,
+                    nodeTypes, true);
+            }
+        }
+    }
+
+    private ToscaNodeType createProxyNodeType(Map<String, Component> componentCache, Component origComponent,
+                                              Component proxyComponent, ComponentInstance componentInstance) {
+        ToscaNodeType toscaNodeType = new ToscaNodeType();
+        String derivedFrom = ((Resource) origComponent).getToscaResourceName();
+
+        toscaNodeType.setDerived_from(derivedFrom);
+        Either<Map<String, DataTypeDefinition>, JanusGraphOperationStatus> dataTypesEither = applicationDataTypeCache.getAll(
+            origComponent.getModel());
+        if (dataTypesEither.isRight()) {
+            log.debug("Failed to retrieve all data types {}", dataTypesEither.right().value());
+        }
+        Map<String, DataTypeDefinition> dataTypes = dataTypesEither.left().value();
+        Map<String, ToscaCapability> capabilities = this.capabilityRequirementConverter
+            .convertProxyCapabilities(componentCache, componentInstance, dataTypes);
+
+        if (MapUtils.isNotEmpty(capabilities)) {
+            toscaNodeType.setCapabilities(capabilities);
+        }
+        List<Map<String, ToscaRequirement>> proxyNodeTypeRequirements = this.capabilityRequirementConverter
+            .convertProxyRequirements(componentCache, componentInstance);
+        if (CollectionUtils.isNotEmpty(proxyNodeTypeRequirements)) {
+            toscaNodeType.setRequirements(proxyNodeTypeRequirements);
+        }
+        Optional<Map<String, ToscaProperty>> proxyProperties = getProxyNodeTypeProperties(proxyComponent, dataTypes);
+        proxyProperties.ifPresent(toscaNodeType::setProperties);
+
+        Map<String, Object> interfaceMap = new HashMap<>();
+        if (MapUtils.isEmpty(componentInstance.getInterfaces())) {
+            final Optional<Map<String, Object>> proxyInterfaces = getProxyNodeTypeInterfaces(proxyComponent, dataTypes);
+            if (proxyInterfaces.isPresent()) {
+                interfaceMap = proxyInterfaces.get();
+            }
+        } else {
+            interfaceMap = interfacesOperationsConverter
+                .getInterfacesMapFromComponentInstance(proxyComponent, componentInstance, dataTypes, false, false);
+
+        }
+        interfacesOperationsConverter.removeInterfacesWithoutOperations(interfaceMap);
+        toscaNodeType.setInterfaces(MapUtils.isEmpty(interfaceMap) ? null : interfaceMap);
+
+        return toscaNodeType;
+    }
+
+    private Either<ToscaNodeTemplate, ToscaError> convertComponentInstanceRequirements(Component component,
+                                                                                       ComponentInstance componentInstance,
+                                                                                       List<RequirementCapabilityRelDef> relations,
+                                                                                       ToscaNodeTemplate nodeTypeTemplate,
+                                                                                       Component originComponent,
+                                                                                       Map<String, Component> componentCache) {
+
+        final List<RequirementCapabilityRelDef> requirementDefinitionList = filterRequirements(componentInstance,
+            relations);
+        if (isNotEmpty(requirementDefinitionList)) {
+            try {
+                final List<Map<String, ToscaTemplateRequirement>> toscaRequirements = buildRequirements(component, componentInstance,
+                    requirementDefinitionList, originComponent, componentCache);
+                if (!toscaRequirements.isEmpty()) {
+                    nodeTypeTemplate.setRequirements(toscaRequirements);
+                }
+            } catch (final Exception e) {
+                log.debug("Failed to convert component instance requirements for the component instance {}. ",
+                    componentInstance.getName(), e);
+                return Either.right(ToscaError.NODE_TYPE_REQUIREMENT_ERROR);
+            }
+        }
+        log.debug("Finished to convert requirements for the node type {} ", componentInstance.getName());
+        return Either.left(nodeTypeTemplate);
+    }
+
+    private List<Map<String, ToscaTemplateRequirement>> buildRequirements(final Component component,
+                                                                          final ComponentInstance componentInstance,
+                                                                          final List<RequirementCapabilityRelDef> filteredRelations,
+                                                                          final Component originComponent,
+                                                                          final Map<String, Component> componentCache)
+        throws ToscaExportException {
+
+        final List<Map<String, ToscaTemplateRequirement>> toscaRequirements = new ArrayList<>();
+        for (RequirementCapabilityRelDef relationshipDefinition : filteredRelations) {
+            final Map<String, ToscaTemplateRequirement> toscaTemplateRequirementMap =
+                buildRequirement(componentInstance, originComponent, component.getComponentInstances(), relationshipDefinition, componentCache);
+            toscaRequirements.add(toscaTemplateRequirementMap);
+        }
+
+        return toscaRequirements;
+    }
+
+    private List<RequirementCapabilityRelDef> filterRequirements(ComponentInstance componentInstance,
+                                                                 List<RequirementCapabilityRelDef> relations) {
+        return relations.stream()
+            .filter(p -> componentInstance.getUniqueId().equals(p.getFromNode())).collect(Collectors.toList());
+    }
+
+    private Map<String, ToscaTemplateRequirement> buildRequirement(final ComponentInstance fromInstance,
+                                                                   final Component fromOriginComponent,
+                                                                   final List<ComponentInstance> instancesList,
+                                                                   final RequirementCapabilityRelDef relationshipDefinition,
+                                                                   final Map<String, Component> componentCache)
+        throws ToscaExportException {
+
+        final Map<String, List<RequirementDefinition>> reqMap = fromOriginComponent.getRequirements();
+        final CapabilityRequirementRelationship capabilityRequirementRelationship = relationshipDefinition
+            .getRelationships().get(0);
+        final RelationshipInfo relationshipInfo = capabilityRequirementRelationship.getRelation();
+
+        final ComponentInstance toInstance = instancesList.stream()
+            .filter(i -> relationshipDefinition.getToNode().equals(i.getUniqueId()))
+            .findFirst().orElse(null);
+        if (toInstance == null) {
+            final String errorMsg = String
+                .format("Failed to find a relation from the node %s to the node %s", fromInstance.getName(),
+                    relationshipDefinition.getToNode());
+            log.debug(errorMsg);
+            throw new ToscaExportException(errorMsg);
+        }
+        final Optional<RequirementDefinition> reqOpt =
+            findRequirement(fromOriginComponent, reqMap, relationshipInfo, fromInstance.getUniqueId());
+        if (reqOpt.isEmpty()) {
+            final String errorMsg = String
+                .format("Failed to find a requirement with uniqueId %s on a component with uniqueId %s",
+                    relationshipInfo.getRequirementUid(), fromOriginComponent.getUniqueId());
+            log.debug(errorMsg);
+            throw new ToscaExportException(errorMsg);
+        }
+        final ComponentParametersView filter = new ComponentParametersView(true);
+        filter.setIgnoreComponentInstances(false);
+        filter.setIgnoreCapabilities(false);
+        filter.setIgnoreGroups(false);
+        final Either<Component, StorageOperationStatus> getOriginRes =
+            toscaOperationFacade.getToscaElement(toInstance.getActualComponentUid(), filter);
+        if (getOriginRes.isRight()) {
+            final String errorMsg = String.format(
+                "Failed to build substituted name for the requirement %s. "
+                    + "Failed to get an origin component with uniqueId %s",
+                reqOpt.get().getName(), toInstance.getActualComponentUid());
+            log.debug(errorMsg);
+            throw new ToscaExportException(errorMsg);
+        }
+        final Component toOriginComponent = getOriginRes.left().value();
+        Optional<CapabilityDefinition> capOpt = toOriginComponent.getCapabilities().get(reqOpt.get().getCapability()).stream()
+            .filter(c -> isCapabilityBelongToRelation(relationshipInfo, c)).findFirst();
+        if (capOpt.isEmpty()) {
+            capOpt = findCapability(relationshipInfo, toOriginComponent, fromOriginComponent, reqOpt.get());
+            if (capOpt.isEmpty()) {
+                final String errorMsg = String
+                    .format("Failed to find a capability with name %s on a component with uniqueId %s",
+                        relationshipInfo.getCapability(), fromOriginComponent.getUniqueId());
+                log.debug(errorMsg);
+                throw new ToscaExportException(errorMsg);
+            }
+        }
+        return buildRequirement(fromOriginComponent, toOriginComponent, capOpt.get(), reqOpt.get(),
+            capabilityRequirementRelationship, toInstance, componentCache);
+    }
+
+    private boolean isCapabilityBelongToRelation(RelationshipInfo reqAndRelationshipPair,
+                                                 CapabilityDefinition capability) {
+        return capability.getName().equals(reqAndRelationshipPair.getCapability()) && (capability.getOwnerId() != null
+            && capability.getOwnerId().equals(reqAndRelationshipPair.getCapabilityOwnerId()));
+    }
+
+    private Optional<CapabilityDefinition> findCapability(RelationshipInfo reqAndRelationshipPair,
+                                                          Component toOriginComponent, Component fromOriginComponent,
+                                                          RequirementDefinition requirement) {
+        Optional<CapabilityDefinition> cap = toOriginComponent.getCapabilities().get(requirement.getCapability())
+            .stream().filter(c -> c.getType().equals(requirement.getCapability())).findFirst();
+        if (!cap.isPresent()) {
+            log.debug("Failed to find a capability with name {} on a component with uniqueId {}",
+                reqAndRelationshipPair.getCapability(), fromOriginComponent.getUniqueId());
+        }
+        return cap;
+    }
+
+    private Map<String, ToscaTemplateRequirement> buildRequirement(final Component fromOriginComponent,
+                                                                   final Component toOriginComponent,
+                                                                   final CapabilityDefinition capability,
+                                                                   final RequirementDefinition requirement,
+                                                                   final CapabilityRequirementRelationship capabilityRequirementRelationship,
+                                                                   final ComponentInstance toInstance,
+                                                                   final Map<String, Component> componentCache)
+        throws ToscaExportException {
+
+        List<String> reducedPath = capability.getPath();
+        if (capability.getOwnerId() != null) {
+            reducedPath = capabilityRequirementConverter
+                .getReducedPathByOwner(capability.getPath(), capability.getOwnerId());
+        }
+        final RelationshipInfo relationshipInfo = capabilityRequirementRelationship.getRelation();
+        final Either<String, Boolean> capabilityNameEither = capabilityRequirementConverter.buildSubstitutedName(componentCache,
+            toOriginComponent, reducedPath, relationshipInfo.getCapability(), capability.getPreviousName(), capability.getExternalName());
+        if (capabilityNameEither.isRight()) {
+            final String errorMsg = String.format(
+                "Failed to build a substituted capability name for the capability with name %s on a component with uniqueId %s",
+                capabilityRequirementRelationship.getCapability(), toOriginComponent.getUniqueId());
+            log.debug(
+                errorMsg);
+            throw new ToscaExportException(errorMsg);
+        }
+        final Either<String, Boolean> requirementNameEither = capabilityRequirementConverter
+            .buildSubstitutedName(componentCache, fromOriginComponent,
+                requirement.getPath(), relationshipInfo.getRequirement(), requirement.getPreviousName(), requirement.getExternalName());
+        if (requirementNameEither.isRight()) {
+            final String errorMsg = String.format("Failed to build a substituted requirement name for the requirement "
+                    + "with name %s on a component with uniqueId %s",
+                capabilityRequirementRelationship.getRequirement(), fromOriginComponent.getUniqueId());
+            log.debug(errorMsg);
+            throw new ToscaExportException(errorMsg);
+        }
+        final ToscaTemplateRequirement toscaRequirement = new ToscaTemplateRequirement();
+        final Map<String, ToscaTemplateRequirement> toscaReqMap = new HashMap<>();
+        toscaRequirement.setNode(toInstance.getName());
+        toscaRequirement.setCapability(capabilityNameEither.left().value());
+        if (isNotEmpty(capabilityRequirementRelationship.getOperations())) {
+            toscaRequirement.setRelationship(new ToscaRelationshipBuilder().from(capabilityRequirementRelationship));
+        }
+        toscaReqMap.put(requirementNameEither.left().value(), toscaRequirement);
+        return toscaReqMap;
+    }
+
+    private Optional<RequirementDefinition> findRequirement(Component fromOriginComponent,
+                                                            Map<String, List<RequirementDefinition>> reqMap,
+                                                            RelationshipInfo reqAndRelationshipPair,
+                                                            String fromInstanceId) {
+        for (List<RequirementDefinition> reqList : reqMap.values()) {
+            Optional<RequirementDefinition> reqOpt = reqList.stream().filter(
+                    r -> isRequirementBelongToRelation(fromOriginComponent, reqAndRelationshipPair, r, fromInstanceId))
+                .findFirst();
+            if (reqOpt.isPresent()) {
+                return reqOpt;
+            }
+        }
+        return Optional.empty();
+    }
+
+    /**
+     * Allows detecting the requirement belonging to the received relationship The detection logic is: A requirement belongs to a relationship IF
+     * 1.The name of the requirement equals to the "requirement" field of the relation; AND 2. In case of a non-atomic resource, OwnerId of the
+     * requirement equals to requirementOwnerId of the relation OR uniqueId of toInstance equals to capabilityOwnerId of the relation
+     */
+    private boolean isRequirementBelongToRelation(Component originComponent, RelationshipInfo reqAndRelationshipPair,
+                                                  RequirementDefinition requirement, String fromInstanceId) {
+        if (!StringUtils.equals(requirement.getName(), reqAndRelationshipPair.getRequirement())) {
+            log.debug("Failed to find a requirement with name {} and  reqAndRelationshipPair {}", requirement.getName(),
+                reqAndRelationshipPair.getRequirement());
+            return false;
+        }
+        return ModelConverter.isAtomicComponent(originComponent) || isRequirementBelongToOwner(reqAndRelationshipPair, requirement, fromInstanceId,
+            originComponent);
+    }
+
+    private boolean isRequirementBelongToOwner(RelationshipInfo reqAndRelationshipPair, RequirementDefinition requirement, String fromInstanceId,
+                                               Component originComponent) {
+        return StringUtils.equals(requirement.getOwnerId(), reqAndRelationshipPair.getRequirementOwnerId()) || (
+            isCvfc(originComponent) && StringUtils.equals(fromInstanceId, reqAndRelationshipPair.getRequirementOwnerId()) || StringUtils
+                .equals(requirement.getOwnerId(), originComponent.getUniqueId()));
+    }
+
+    private boolean isCvfc(Component component) {
+        return component.getComponentType() == ComponentTypeEnum.RESOURCE && ((Resource) component).getResourceType() == ResourceTypeEnum.CVFC;
+    }
+
+    private Either<Map<String, String[]>, ToscaError> convertSubstitutionMappingCapabilities(final Component component,
+                                                                                             final Map<String, Component> componentCache) {
+        Either<Map<String, String[]>, ToscaError> toscaCapabilitiesRes =
+            capabilityRequirementConverter.convertSubstitutionMappingCapabilities(componentCache, component);
+        if (toscaCapabilitiesRes.isRight()) {
+            log.debug("Failed convert capabilities for the component {}. ", component.getName());
+            return Either.right(toscaCapabilitiesRes.right().value());
+        }
+        if (isNotEmpty(toscaCapabilitiesRes.left().value())) {
+            log.debug("Finish convert capabilities for the component {}. ", component.getName());
+            return Either.left(toscaCapabilitiesRes.left().value());
+        }
+        log.debug("Finished to convert capabilities for the component {}. ", component.getName());
+
+        return Either.left(Collections.emptyMap());
+    }
+
+    private Either<ToscaNodeType, ToscaError> convertCapabilities(Map<String, Component> componentsCache, Component component, ToscaNodeType nodeType,
+                                                                  Map<String, DataTypeDefinition> dataTypes) {
+        Map<String, ToscaCapability> toscaCapabilities = capabilityRequirementConverter.convertCapabilities(componentsCache, component, dataTypes);
+        if (!toscaCapabilities.isEmpty()) {
+            nodeType.setCapabilities(toscaCapabilities);
+        }
+        log.debug("Finish convert Capabilities for node type");
+        return Either.left(nodeType);
+    }
+
+    private Map<String, ToscaTemplateArtifact> convertToNodeTemplateArtifacts(Map<String, ToscaArtifactDataDefinition> artifacts) {
+        if (artifacts == null) {
+            return null;
+        }
+        Map<String, ToscaTemplateArtifact> arts = new HashMap<>();
+        for (Map.Entry<String, ToscaArtifactDataDefinition> entry : artifacts.entrySet()) {
+            ToscaTemplateArtifact artifact = new ToscaTemplateArtifact();
+            artifact.setFile(entry.getValue().getFile());
+            artifact.setType(entry.getValue().getType());
+            artifact.setProperties(entry.getValue().getProperties());
+            arts.put(entry.getKey(), artifact);
+        }
+        return arts;
+    }
+
+    private NodeFilter convertToNodeTemplateNodeFilterComponent(CINodeFilterDataDefinition inNodeFilter) {
+        if (inNodeFilter == null) {
+            return null;
+        }
+        NodeFilter nodeFilter = new NodeFilter();
+        ListDataDefinition<RequirementNodeFilterCapabilityDataDefinition> origCapabilities = inNodeFilter.getCapabilities();
+        ListDataDefinition<PropertyFilterDataDefinition> origProperties = inNodeFilter.getProperties();
+        List<Map<String, CapabilityFilter>> capabilitiesCopy = new ArrayList<>();
+        copyNodeFilterCapabilitiesTemplate(origCapabilities, capabilitiesCopy);
+        if (CollectionUtils.isNotEmpty(capabilitiesCopy)) {
+            nodeFilter.setCapabilities(capabilitiesCopy);
+        }
+        final List<Map<String, List<Object>>> propertiesCopy = copyNodeFilterProperties(origProperties);
+        if (CollectionUtils.isNotEmpty(propertiesCopy)) {
+            nodeFilter.setProperties(propertiesCopy);
+        }
+        nodeFilter.setTosca_id(cloneToscaId(inNodeFilter.getTosca_id()));
+        nodeFilter = (NodeFilter) cloneObjectFromYml(nodeFilter, NodeFilter.class);
+        return nodeFilter;
+    }
+
+    private NodeFilter convertToSubstitutionFilterComponent(final SubstitutionFilterDataDefinition substitutionFilterDataDefinition) {
+        if (substitutionFilterDataDefinition == null) {
+            return null;
+        }
+        NodeFilter nodeFilter = new NodeFilter();
+        final List<Map<String, List<Object>>> propertiesCopy = copySubstitutionPropertiesFilter(substitutionFilterDataDefinition.getProperties());
+        if (!propertiesCopy.isEmpty()) {
+            nodeFilter.setProperties(propertiesCopy);
+        }
+        nodeFilter.setTosca_id(cloneToscaId(substitutionFilterDataDefinition.getTosca_id()));
+        return (NodeFilter) cloneObjectFromYml(nodeFilter, NodeFilter.class);
+    }
+
+    private Object cloneToscaId(Object toscaId) {
+        return Objects.isNull(toscaId) ? null : cloneObjectFromYml(toscaId, toscaId.getClass());
+    }
+
+    private Object cloneObjectFromYml(Object objToClone, Class classOfObj) {
+        String objectAsYml = yamlUtil.objectToYaml(objToClone);
+        return yamlUtil.yamlToObject(objectAsYml, classOfObj);
+    }
+
+    private void copyNodeFilterCapabilitiesTemplate(ListDataDefinition<RequirementNodeFilterCapabilityDataDefinition> origCapabilities,
+                                                    List<Map<String, CapabilityFilter>> capabilitiesCopy) {
+        if (origCapabilities == null || origCapabilities.getListToscaDataDefinition() == null || origCapabilities.getListToscaDataDefinition()
+            .isEmpty()) {
+            return;
+        }
+        for (RequirementNodeFilterCapabilityDataDefinition capability : origCapabilities.getListToscaDataDefinition()) {
+            Map<String, CapabilityFilter> capabilityFilterCopyMap = new HashMap<>();
+            final var capabilityFilter = new CapabilityFilter();
+            capabilityFilter.setProperties(copyNodeFilterProperties(capability.getProperties()));
+            capabilityFilterCopyMap.put(capability.getName(), capabilityFilter);
+            capabilitiesCopy.add(capabilityFilterCopyMap);
+        }
+    }
+
+    private List<Map<String, List<Object>>> copyNodeFilterProperties(final ListDataDefinition<PropertyFilterDataDefinition> origProperties) {
+        if (origProperties == null || origProperties.getListToscaDataDefinition() == null || origProperties.isEmpty()) {
+            return Collections.emptyList();
+        }
+        List<Map<String, List<Object>>> propertiesCopy = new ArrayList<>();
+        Map<String, List<Object>> propertyFilterDefinitionMap = new HashMap<>();
+        for (final PropertyFilterDataDefinition propertyFilter : origProperties.getListToscaDataDefinition()) {
+            final String propertyName = propertyFilter.getName();
+            for (final PropertyFilterConstraintDataDefinition filterConstraint : propertyFilter.getConstraints()) {
+                propertyFilterDefinitionMap.compute(propertyName, (propertyName1, constraints) -> {
+                    if (constraints == null) {
+                        constraints = new ArrayList<>();
+                    }
+                    constraints.add(buildNodeFilterValue(filterConstraint));
+                    return constraints;
+                });
+            }
+        }
+        propertyFilterDefinitionMap.entrySet().stream()
+            .map(entry -> Map.of(entry.getKey(), entry.getValue()))
+            .forEach(propertiesCopy::add);
+        return propertiesCopy;
+    }
+
+    private List<Map<String, List<Object>>> copySubstitutionPropertiesFilter(
+        final ListDataDefinition<SubstitutionFilterPropertyDataDefinition> origProperties) {
+
+        if (origProperties == null || origProperties.getListToscaDataDefinition() == null || origProperties.isEmpty()) {
+            return Collections.emptyList();
+        }
+        List<Map<String, List<Object>>> propertiesCopy = new ArrayList<>();
+        Map<String, List<Object>> propertyFilterDefinitionMap = new HashMap<>();
+        for (final SubstitutionFilterPropertyDataDefinition propertyFilter : origProperties.getListToscaDataDefinition()) {
+            final String propertyName = propertyFilter.getName();
+            for (final PropertyFilterConstraintDataDefinition filterConstraint : propertyFilter.getConstraints()) {
+                propertyFilterDefinitionMap.compute(propertyName, (propertyName1, constraints) -> {
+                    if (constraints == null) {
+                        constraints = new ArrayList<>();
+                    }
+                    constraints.add(buildNodeFilterValue(filterConstraint));
+                    return constraints;
+                });
+            }
+        }
+        propertyFilterDefinitionMap.entrySet().stream()
+            .map(entry -> Map.of(entry.getKey(), entry.getValue()))
+            .forEach(propertiesCopy::add);
+        return propertiesCopy;
+    }
+
+    private static Object buildNodeFilterValue(final PropertyFilterConstraintDataDefinition filterConstraint) {
+        if (filterConstraint.getValue() instanceof ToscaFunction) {
+            return Map.of(filterConstraint.getOperator().getType(), ((ToscaFunction) filterConstraint.getValue()).getJsonObjectValue());
+        } else {
+            return Map.of(filterConstraint.getOperator().getType(), filterConstraint.getValue());
+        }
+    }
+
+    private Map<String, String[]> buildSubstitutionMappingPropertyMapping(final Component component) {
+        if (component == null || CollectionUtils.isEmpty(component.getInputs())) {
+            return Collections.emptyMap();
+        }
+        return component.getInputs().stream().filter(InputDefinition::isMappedToComponentProperty).map(PropertyDataDefinition::getName)
+            .collect(Collectors.toMap(inputName -> inputName, inputName -> new String[]{inputName}, (inputName1, inputName2) -> inputName1));
+    }
+
+    private Map<String, String[]> buildSubstitutionMappingAttributesMapping(final Component component) {
+        if (component == null || CollectionUtils.isEmpty(component.getOutputs())) {
+            return Collections.emptyMap();
+        }
+        return component.getOutputs().stream().map(AttributeDataDefinition::getName)
+            .collect(Collectors.toMap(outputName -> outputName, outputName -> new String[]{outputName}, (outputName1, outputName2) -> outputName1));
+    }
+
+    private Optional<Map<String, ToscaProperty>> getProxyNodeTypeProperties(Component proxyComponent, Map<String, DataTypeDefinition> dataTypes) {
+        if (Objects.isNull(proxyComponent)) {
+            return Optional.empty();
+        }
+        final var proxyProperties = convertInputsToProperties(dataTypes, proxyComponent.getInputs(), proxyComponent.getUniqueId());
+        if (CollectionUtils.isNotEmpty(proxyComponent.getProperties())) {
+            proxyProperties.putAll(proxyComponent.getProperties().stream()
+                .map(propertyDefinition -> resolvePropertyValueFromInput(propertyDefinition, proxyComponent.getInputs())).collect(Collectors
+                    .toMap(PropertyDataDefinition::getName,
+                        property -> propertyConvertor.convertProperty(dataTypes, property, PropertyType.PROPERTY))));
+        }
+        return MapUtils.isNotEmpty(proxyProperties) ? Optional.of(proxyProperties) : Optional.empty();
+    }
+
+    private Map<String, ToscaProperty> convertInputsToProperties(Map<String, DataTypeDefinition> dataTypes, List<InputDefinition> componentInputs,
+                                                                 String componentUniqueId) {
+        if (CollectionUtils.isEmpty(componentInputs)) {
+            return new HashMap<>();
+        }
+        return componentInputs.stream().filter(input -> componentUniqueId.equals(input.getInstanceUniqueId()))
+            .collect(Collectors.toMap(InputDefinition::getName, i -> propertyConvertor.convertProperty(dataTypes, i, PropertyType.INPUT)));
+    }
+
+    private Optional<Map<String, Object>> getProxyNodeTypeInterfaces(Component proxyComponent, Map<String, DataTypeDefinition> dataTypes) {
+        if (Objects.isNull(proxyComponent) || MapUtils.isEmpty(proxyComponent.getInterfaces())) {
+            return Optional.empty();
+        }
+        Map<String, InterfaceDefinition> proxyComponentInterfaces = proxyComponent.getInterfaces();
+        //Unset artifact path for operation implementation for proxy node types as for operations with artifacts it is
+
+        // always available in the proxy node template
+        removeOperationImplementationForProxyNodeType(proxyComponentInterfaces);
+        return Optional
+            .ofNullable(interfacesOperationsConverter.getInterfacesMap(proxyComponent, null, proxyComponentInterfaces, dataTypes, false, false));
+    }
+
+    private Configuration getConfiguration() {
+        return ConfigurationManager.getConfigurationManager().getConfiguration();
+    }
+
+    private static class CustomRepresenter extends Representer {
+
+        CustomRepresenter() {
+            super();
+            this.representers.put(ToscaPropertyAssignment.class, new RepresentToscaPropertyAssignment());
+            this.representers.put(ToscaAttribute.class, new RepresentToscaAttribute());
+            // null representer is exceptional and it is stored as an instance
+
+            // variable.
+            this.nullRepresenter = new RepresentNull();
+        }
+
+        public boolean validateGetInputValue(final Object valueObj) {
+            if (!(valueObj instanceof List) && !(valueObj instanceof String)) {
+                return false;
+            }
+            if (valueObj instanceof List) {
+                return ((List) valueObj).size() > 1;
+            }
+            return true;
+        }
+
+        public boolean validateGetPropertyOrAttributeValue(final Object valueObj) {
+            if (valueObj instanceof List) {
+                return ((List) valueObj).size() > 1;
+            }
+            return false;
+        }
+
+        @Override
+        protected NodeTuple representJavaBeanProperty(Object javaBean, Property property, Object propertyValue, Tag customTag) {
+            if (propertyValue == null) {
+                return null;
+            }
+            // skip not relevant for Tosca property
+            if ("dependencies".equals(property.getName())) {
+                return null;
+            }
+            if (javaBean instanceof ToscaRelationshipTemplate && "name".equals(property.getName())) {
+                return null;
+            }
+            removeDefaultP(propertyValue);
+            NodeTuple defaultNode = super.representJavaBeanProperty(javaBean, property, propertyValue, customTag);
+            if (javaBean instanceof ToscaTopolgyTemplate && "relationshipTemplates".equals(property.getName())) {
+                return new NodeTuple(representData("relationship_templates"), defaultNode.getValueNode());
+            }
+            return "_defaultp_".equals(property.getName()) ? new NodeTuple(representData("default"), defaultNode.getValueNode()) : defaultNode;
+        }
+
+        private void removeDefaultP(final Object propertyValue) {
+            if (propertyValue instanceof Map) {
+                final Map mapPropertyValue = ((Map) propertyValue);
+                final Iterator<Entry> iter = mapPropertyValue.entrySet().iterator();
+                Object defaultValue = null;
+                while (iter.hasNext()) {
+                    final Map.Entry entry = iter.next();
+                    if ("_defaultp_".equals(entry.getKey())) {
+                        defaultValue = entry.getValue();
+                        iter.remove();
+                    } else if (entry.getValue() instanceof Map) {
+                        removeDefaultP(entry.getValue());
+                    }
+                }
+                if (defaultValue != null) {
+                    mapPropertyValue.putIfAbsent("default", defaultValue);
+                }
+            }
+        }
+
+        @Override
+        protected MappingNode representJavaBean(Set<Property> properties, Object javaBean) {
+            // remove the bean type from the output yaml (!! ...)
+            if (!classTags.containsKey(javaBean.getClass())) {
+                addClassTag(javaBean.getClass(), Tag.MAP);
+            }
+            return super.representJavaBean(properties, javaBean);
+        }
+
+        private class RepresentToscaAttribute implements Represent {
+
+            @Override
+            public Node representData(Object data) {
+                final ToscaAttribute toscaAttribute = (ToscaAttribute) data;
+                return represent(toscaAttribute.asToscaMap());
+            }
+        }
+
+        private class RepresentToscaPropertyAssignment implements Represent {
+
+            public Node representData(Object data) {
+                final ToscaPropertyAssignment toscaOperationAssignment = (ToscaPropertyAssignment) data;
+                if (toscaOperationAssignment.getValue() instanceof String) {
+                    final String stringValue = (String) toscaOperationAssignment.getValue();
+                    if (isPropertyOrAttributeFunction(stringValue)) {
+                        return representGetAttribute(stringValue);
+                    }
+                    return representScalar(Tag.STR, stringValue);
+                }
+                return represent(null);
+            }
+
+            public Node representGetAttribute(final String getAttributeFunction) {
+                return represent(new Yaml().load(getAttributeFunction));
+            }
+
+            public boolean isPropertyOrAttributeFunction(final String value) {
+                try {
+                    final Yaml yaml = new Yaml();
+                    final Object yamlObj = yaml.load(value);
+                    if (!(yamlObj instanceof Map)) {
+                        return false;
+                    }
+                    final Map<String, Object> getAttributeMap = (Map) yamlObj;
+                    if (getAttributeMap.size() != 1) {
+                        return false;
+                    }
+                    final List<String> functionList = Arrays
+                        .asList(GET_ATTRIBUTE.getFunctionName(), GET_INPUT.getFunctionName(), GET_PROPERTY.getFunctionName());
+                    final Optional<String> function = getAttributeMap.keySet().stream()
+                        .filter(key -> functionList.stream().anyMatch(function1 -> function1.equals(key))).findFirst();
+                    if (function.isEmpty()) {
+                        return false;
+                    }
+                    final String functionName = function.get();
+                    final Object getAttributeValueObj = getAttributeMap.get(functionName);
+                    if (GET_INPUT.getFunctionName().equals(functionName)) {
+                        return validateGetInputValue(getAttributeValueObj);
+                    } else {
+                        return validateGetPropertyOrAttributeValue(getAttributeValueObj);
+                    }
+                } catch (final Exception ignored) {
+                    return false;
+                }
+            }
+        }
+
+        private class RepresentNull implements Represent {
+
+            @Override
+            public Node representData(Object data) {
+                // possible values are here http://yaml.org/type/null.html
+                return representScalar(Tag.NULL, "");
+            }
+        }
+    }
+
+    private static class UnsortedPropertyUtils extends PropertyUtils {
+
+        @Override
+        protected Set<Property> createPropertySet(Class type, BeanAccess bAccess) {
+            Collection<Property> fields = getPropertiesMap(type, BeanAccess.FIELD).values();
+            return new LinkedHashSet<>(fields);
+        }
+    }
 
 }