2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
6 * ================================================================================
7 * Copyright (C) 2017 Amdocs
8 * =============================================================================
9 * Licensed under the Apache License, Version 2.0 (the "License");
10 * you may not use this file except in compliance with the License.
11 * You may obtain a copy of the License at
13 * http://www.apache.org/licenses/LICENSE-2.0
15 * Unless required by applicable law or agreed to in writing, software
16 * distributed under the License is distributed on an "AS IS" BASIS,
17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18 * See the License for the specific language governing permissions and
19 * limitations under the License.
21 * ============LICENSE_END=========================================================
24 package org.onap.appc.yang.impl;
26 import com.att.eelf.configuration.EELFLogger;
27 import com.att.eelf.configuration.EELFManager;
28 import org.apache.commons.lang.StringUtils;
29 import org.apache.velocity.Template;
30 import org.apache.velocity.VelocityContext;
31 import org.apache.velocity.app.VelocityEngine;
32 import org.apache.velocity.exception.ParseErrorException;
33 import org.apache.velocity.exception.ResourceNotFoundException;
34 import org.apache.velocity.runtime.RuntimeConstants;
35 import org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader;
36 import org.opendaylight.yangtools.yang.parser.stmt.rfc6020.YangStatementSourceImpl;
37 import org.onap.appc.yang.YANGGenerator;
38 import org.onap.appc.yang.exception.YANGGenerationException;
39 import org.onap.appc.yang.objects.Leaf;
40 import org.onap.appc.yang.type.YangTypes;
41 import org.onap.sdc.tosca.datatypes.model.NodeType;
42 import org.onap.sdc.tosca.datatypes.model.PropertyDefinition;
43 import org.onap.sdc.tosca.datatypes.model.ServiceTemplate;
44 import org.onap.sdc.tosca.services.YamlUtil;
47 import java.util.HashMap;
48 import java.util.LinkedList;
49 import java.util.List;
52 @SuppressWarnings("CheckStyle")
53 public class YANGGeneratorImpl implements YANGGenerator {
55 private static final EELFLogger Log = EELFManager.getInstance().getLogger(YANGGeneratorImpl.class);
56 private static final String MODULE_TYPE = "moduleType";
57 private static final String LEAVES = "leaves";
61 * @see org.onap.appc.yang.YANGGenerator#generateYANG(java.lang.String, java.lang.String, java.io.OutputStream)
64 public void generateYANG(String uniqueID, String tosca, OutputStream stream)
65 throws YANGGenerationException {
66 Log.info("Entered into generateYANG.");
67 Log.debug("Received Tosca:\n" + tosca +"\n Received uniqueID: "+uniqueID);
69 validateInput(uniqueID, tosca, stream);
70 Map<String,Object> parsedToscaMap = parseTosca(tosca);
71 String moduleType =parsedToscaMap.get(MODULE_TYPE).toString();
72 List<Leaf> leaves = (List<Leaf>) parsedToscaMap.get(LEAVES);
73 VelocityEngine ve = new VelocityEngine();
74 ve.setProperty(RuntimeConstants.RESOURCE_LOADER, "classpath");
75 ve.setProperty("classpath.resource.loader.class", ClasspathResourceLoader.class.getName());
80 template = ve.getTemplate("templates/YangTemplate.vm");
81 } catch ( ResourceNotFoundException | ParseErrorException ex) {
82 Log.error("Error while retrieving YANG Template", ex);
83 throw new YANGGenerationException("Error while retrieving YANG Template",ex);
86 VelocityContext vc = new VelocityContext();
88 vc.put("moduleName", uniqueID);
89 vc.put(MODULE_TYPE, moduleType);
90 vc.put(LEAVES, leaves);
92 StringWriter sw = new StringWriter();
93 template.merge(vc,sw);
94 Log.debug("generated YANG \n "+sw.toString());
96 String yang = sw.toString();
98 stream.write(yang.getBytes());
100 } catch (IOException e) {
101 Log.error("Error while writing to outputstream", e);
102 throw new YANGGenerationException("Error writing to outputstream",e);
106 } catch (IOException e) {
107 Log.error("Error while closing outputstream", e);
110 Log.info("exiting generateYANG method.");
113 private void validateYang(String yang) throws YANGGenerationException {
115 try(InputStream inputYangStream = new ByteArrayInputStream(yang.getBytes())){
116 YangStatementSourceImpl statementSource = new YangStatementSourceImpl(inputYangStream);
117 if(statementSource.getYangAST()==null){
118 throw new YANGGenerationException("Syntax Error in Generated YANG = " + yang);
121 catch(IOException e){
122 Log.error("Error validating yang file "+ yang,e);
123 throw new YANGGenerationException("Invalid YANG generated",e);
127 private Map<String,Object> parseTosca(String tosca) throws YANGGenerationException {
128 Log.info("Entered into parseTosca.");
129 ServiceTemplate serviceTemplate = new YamlUtil().yamlToObject(tosca, ServiceTemplate.class);
130 Map<String, NodeType> nodeTypeMap = serviceTemplate.getNode_types();
131 String kind = nodeTypeMap.keySet().toArray(new String[0])[0];
132 NodeType nodeType = nodeTypeMap.get(kind);
133 Map<String,Object> returnMap= new HashMap<>();
134 Map<String, PropertyDefinition> propertyDefinitionFromTOSCA = nodeType.getProperties();
135 returnMap.put(MODULE_TYPE, kind);
136 List<Leaf> leaves = new LinkedList<>();
138 for(Map.Entry<String, PropertyDefinition> entry: propertyDefinitionFromTOSCA.entrySet()){
139 Leaf leaf = new Leaf();
140 leaf.setName(entry.getKey());
141 PropertyDefinition pd = entry.getValue();
142 Map<String,String> typeMap=YangTypes.getYangTypeMap();
143 if (typeMap.containsKey(pd.getType())) {
144 String paramType = typeMap.get(pd.getType());
145 leaf.setType(paramType);
146 leaf.setDescription(!StringUtils.isEmpty(pd.getDescription()) ? pd.getDescription() : "");
147 leaf.setMandatory((pd.getRequired() != null) ? Boolean.toString(pd.getRequired()) : Boolean.toString(false));
148 leaf.setDefaultValue((pd.get_default() != null) ? pd.get_default().toString(): "");
151 YANGGenerationException yangGenerationException = new YANGGenerationException(pd.getType() + " Type is not supported ", null);
152 Log.error(pd.getType() + " Type is not supported ", yangGenerationException);
153 throw yangGenerationException;
156 returnMap.put(LEAVES, leaves);
157 Log.info("exiting parseTosca method with return MAP "+returnMap);
161 private void validateInput(String uniqueID, String tosca, OutputStream stream) throws YANGGenerationException {
162 Log.info("Entered into validateInput.");
163 if(StringUtils.isEmpty(uniqueID)) {
164 throw new YANGGenerationException("uniqueID is mandatory, cannot be null or empty.",null);
166 if(StringUtils.isEmpty(tosca)) {
167 throw new YANGGenerationException("tosca is mandatory, cannot be null or empty.",null);
170 throw new YANGGenerationException("stream is mandatory, cannot be null.",null);
172 Log.info("exiting validateInput method.");