lib/server-core/src/main/java/org/apache/olingo/server/core/serializer/json/JsonDeltaSerializer.java [350:372]:
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  private void writeComplexCollection(final ServiceMetadata metadata, final EdmComplexType type,
      final Property property,
      final Set<List<String>> selectedPaths, final JsonGenerator json)
      throws IOException, SerializerException {
    json.writeStartArray();
    for (Object value : property.asCollection()) {
      switch (property.getValueType()) {
      case COLLECTION_COMPLEX:
        json.writeStartObject();
        if (isODataMetadataFull) {
          json.writeStringField(Constants.JSON_TYPE, "#" +
              type.getFullQualifiedName().getFullQualifiedNameAsString());
        }
        writeComplexValue(metadata, type, ((ComplexValue) value).getValue(), selectedPaths, json);
        json.writeEndObject();
        break;
      default:
        throw new SerializerException("Property type not yet supported!",
            SerializerException.MessageKeys.UNSUPPORTED_PROPERTY_TYPE, property.getName());
      }
    }
    json.writeEndArray();
  }
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lib/server-core/src/main/java/org/apache/olingo/server/core/serializer/json/JsonDeltaSerializerWithNavigations.java [386:408]:
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  private void writeComplexCollection(final ServiceMetadata metadata, final EdmComplexType type,
      final Property property,
      final Set<List<String>> selectedPaths, final JsonGenerator json)
      throws IOException, SerializerException {
    json.writeStartArray();
    for (Object value : property.asCollection()) {
      switch (property.getValueType()) {
      case COLLECTION_COMPLEX:
        json.writeStartObject();
        if (isODataMetadataFull) {
          json.writeStringField(Constants.JSON_TYPE, "#" +
              type.getFullQualifiedName().getFullQualifiedNameAsString());
        }
        writeComplexValue(metadata, type, ((ComplexValue) value).getValue(), selectedPaths, json);
        json.writeEndObject();
        break;
      default:
        throw new SerializerException("Property type not yet supported!",
            SerializerException.MessageKeys.UNSUPPORTED_PROPERTY_TYPE, property.getName());
      }
    }
    json.writeEndArray();
  }
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