openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-core/src/main/java/org/openecomp/core/impl/ToscaConverterUtil.java

   1 package org.openecomp.core.impl;
   2
   3 import org.apache.commons.collections4.CollectionUtils;
   4 import org.apache.commons.lang.StringUtils;
   5 import org.openecomp.core.converter.errors.CreateToscaObjectErrorBuilder;
   6 import org.openecomp.sdc.common.errors.CoreException;
   7 import org.openecomp.sdc.logging.api.Logger;
   8 import org.openecomp.sdc.logging.api.LoggerFactory;
   9
  10 import java.lang.reflect.Field;
  11 import java.util.HashSet;
  12 import java.util.Map;
  13 import java.util.Objects;
  14 import java.util.Optional;
  15 import java.util.Set;
  16 import java.util.stream.Collectors;
  17 import java.util.stream.Stream;
  18
  19 public class ToscaConverterUtil {
  20   private static final String SET = "set";
  21   private static final String DEFAULT = "default";
  22   private static final String DEFAULT_CAPITAL = "Default";
  23   private static Set<String> defaultValueKeys;
  24
  25   private static Logger LOGGER = LoggerFactory.getLogger(ToscaConverterUtil.class.getName());
  26
  27   static {
  28     defaultValueKeys =
  29         Stream.of(DEFAULT, DEFAULT_CAPITAL).collect(Collectors.toSet());
  30   }
  31
  32   public static <T> Optional<T> createObjectFromClass(String objectId,
  33                                                       Object objectCandidate,
  34                                                       Class<T> classToCreate) {
  35     try {
  36       return createObjectUsingSetters(objectCandidate, classToCreate);
  37     } catch (Exception ex) {
  38       throw new CoreException(
  39           new CreateToscaObjectErrorBuilder(classToCreate.getSimpleName(), objectId)
  40               .build(), ex);
  41     }
  42   }
  43
  44   private static <T> Optional<T> createObjectUsingSetters(Object objectCandidate,
  45                                                           Class<T> classToCreate) throws Exception {
  46     if (Objects.isNull(objectCandidate)
  47         || !(objectCandidate instanceof Map)) {
  48       return Optional.empty();
  49     }
  50
  51     Map<String, Object> objectAsMap = (Map<String, Object>) objectCandidate;
  52     Field[] classFields = classToCreate.getDeclaredFields();
  53     T result = classToCreate.newInstance();
  54
  55     for (Field field : classFields) {
  56       Object fieldValueToAssign = objectAsMap.get(field.getName());
  57       String methodName = SET + StringUtils.capitalize(field.getName());
  58
  59       if(shouldSetterMethodNeedsToGetInvoked(classToCreate, field, fieldValueToAssign, methodName)) {
  60         classToCreate.getMethod(methodName, field.getType()).invoke(result, fieldValueToAssign);
  61       }
  62     }
  63
  64     return Optional.of(result);
  65   }
  66   private static <T> boolean shouldSetterMethodNeedsToGetInvoked(Class<T> classToCreate,
  67                                                                  Field field,
  68                                                                  Object fieldValueToAssign,
  69                                                                  String methodName) {
  70
  71     try {
  72       return Objects.nonNull(fieldValueToAssign)
  73           && Objects.nonNull(classToCreate.getMethod(methodName, field.getType()));
  74     } catch (NoSuchMethodException e) {
  75       LOGGER.debug(String.format("Could not extract method '%s' from class '%s'. returning false " +
  76               "with filedType '%s'.", methodName, classToCreate, field.getType()), e);
  77       return false;
  78     }
  79   }
  80
  81   public static Optional<Object> getDefaultValue(Object entryValue,
  82                                        Object objectToAssignDefaultValue) {
  83     if (!(entryValue instanceof Map)
  84         || Objects.isNull(objectToAssignDefaultValue)) {
  85       return Optional.empty();
  86     }
  87
  88     return Optional.ofNullable(getDefaultParameterValue((Map<String, Object>) entryValue));
  89   }
  90
  91   private static Object getDefaultParameterValue(Map<String, Object> entryValue) {
  92     Object defaultValue = null;
  93     Set<String> keys = new HashSet<>(entryValue.keySet());
  94     keys.retainAll(defaultValueKeys);
  95
  96     if (CollectionUtils.isNotEmpty(keys)) {
  97       defaultValue = entryValue.get(keys.iterator().next());
  98     }
  99
 100     return defaultValue;
 101   }
 102 }