odata2-annotation-processor/annotation-processor-core/src/main/java/org/apache/olingo/odata2/annotation/processor/core/ListsProcessor.java [350:396]:
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  public ODataResponse createEntity(final PostUriInfo uriInfo, final InputStream content,
      final String requestContentType, final String contentType) throws ODataException {
    final EdmEntitySet entitySet = uriInfo.getTargetEntitySet();
    final EdmEntityType entityType = entitySet.getEntityType();

    Object data = dataSource.newDataObject(entitySet);
    ExpandSelectTreeNode expandSelectTree = null;

    if (entityType.hasStream()) {
      dataSource.createData(entitySet, data);
      dataSource.writeBinaryData(entitySet, data,
          new BinaryData(EntityProvider.readBinary(content), requestContentType));

    } else {
      final EntityProviderReadProperties properties = EntityProviderReadProperties.init()
          .mergeSemantic(false)
          .addTypeMappings(getStructuralTypeTypeMap(data, entityType))
          .build();
      final ODataEntry entryValues = parseEntry(entitySet, content, requestContentType, properties);

      setStructuralTypeValuesFromMap(data, entityType, entryValues.getProperties(), false);

      dataSource.createData(entitySet, data);

      createInlinedEntities(entitySet, data, entryValues);

      expandSelectTree = entryValues.getExpandSelectTree();
    }

    // Link back to the entity the target entity set is related to, if any.
    final List<NavigationSegment> navigationSegments = uriInfo.getNavigationSegments();
    if (!navigationSegments.isEmpty()) {
      final List<NavigationSegment> previousSegments = navigationSegments.subList(0, navigationSegments.size() - 1);
      final Object sourceData = retrieveData(
          uriInfo.getStartEntitySet(),
          uriInfo.getKeyPredicates(),
          uriInfo.getFunctionImport(),
          mapFunctionParameters(uriInfo.getFunctionImportParameters()),
          previousSegments);
      final EdmEntitySet previousEntitySet = previousSegments.isEmpty() ?
          uriInfo.getStartEntitySet() : previousSegments.get(previousSegments.size() - 1).getEntitySet();
      dataSource.writeRelation(previousEntitySet, sourceData, entitySet, getStructuralTypeValueMap(data, entityType));
    }

    return ODataResponse.fromResponse(writeEntry(uriInfo.getTargetEntitySet(), expandSelectTree, data, contentType))
        .eTag(constructETag(entitySet, data)).build();
  }
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odata2-lib/odata-ref/src/main/java/org/apache/olingo/odata2/ref/processor/ListsProcessor.java [356:402]:
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  public ODataResponse createEntity(final PostUriInfo uriInfo, final InputStream content,
      final String requestContentType, final String contentType) throws ODataException {
    final EdmEntitySet entitySet = uriInfo.getTargetEntitySet();
    final EdmEntityType entityType = entitySet.getEntityType();

    Object data = dataSource.newDataObject(entitySet);
    ExpandSelectTreeNode expandSelectTree = null;

    if (entityType.hasStream()) {
      dataSource.createData(entitySet, data);
      dataSource.writeBinaryData(entitySet, data,
          new BinaryData(EntityProvider.readBinary(content), requestContentType));

    } else {
      final EntityProviderReadProperties properties = EntityProviderReadProperties.init()
          .mergeSemantic(false)
          .addTypeMappings(getStructuralTypeTypeMap(data, entityType))
          .build();
      final ODataEntry entryValues = parseEntry(entitySet, content, requestContentType, properties);

      setStructuralTypeValuesFromMap(data, entityType, entryValues.getProperties(), false);

      dataSource.createData(entitySet, data);

      createInlinedEntities(entitySet, data, entryValues);

      expandSelectTree = entryValues.getExpandSelectTree();
    }

    // Link back to the entity the target entity set is related to, if any.
    final List<NavigationSegment> navigationSegments = uriInfo.getNavigationSegments();
    if (!navigationSegments.isEmpty()) {
      final List<NavigationSegment> previousSegments = navigationSegments.subList(0, navigationSegments.size() - 1);
      final Object sourceData = retrieveData(
          uriInfo.getStartEntitySet(),
          uriInfo.getKeyPredicates(),
          uriInfo.getFunctionImport(),
          mapFunctionParameters(uriInfo.getFunctionImportParameters()),
          previousSegments);
      final EdmEntitySet previousEntitySet = previousSegments.isEmpty() ?
          uriInfo.getStartEntitySet() : previousSegments.get(previousSegments.size() - 1).getEntitySet();
      dataSource.writeRelation(previousEntitySet, sourceData, entitySet, getStructuralTypeValueMap(data, entityType));
    }

    return ODataResponse.fromResponse(writeEntry(uriInfo.getTargetEntitySet(), expandSelectTree, data, contentType))
        .eTag(constructETag(entitySet, data)).build();
  }
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