odata2-lib/odata-client-core/src/main/java/org/apache/olingo/odata2/client/core/ep/deserializer/JsonEntryDeserializer.java [197:244]:
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        if (properties.containsKey(name)) {
          throw new EntityProviderException(EntityProviderException.DOUBLE_PROPERTY.addContent(name));
        }
        properties.put(name, propertyValue);
      } else {
        readNavigationProperty(name);
      }
    }
  }
  /**
   * 
   * @throws IOException
   * @throws EntityProviderException
   */
  private void readODataContext() throws IOException, EntityProviderException {
    String contextValue = reader.nextString();
    if (contextValue == null) {
      throw new EntityProviderException(EntityProviderException.MISSING_ATTRIBUTE.addContent(FormatJson.ODATA_CONTEXT)
          .addContent(FormatJson.RESULTS));
    }

    if (contextValue.startsWith(FormatJson.DELTA_CONTEXT_PREFIX)
        && contextValue.endsWith(FormatJson.DELTA_CONTEXT_POSTFIX)) {
      while (reader.hasNext()) {
        ensureDeletedEntryMetadataExists();
        String name = reader.nextName();
        String value = reader.nextString();
        if (FormatJson.ID.equals(name)) {
          resultDeletedEntry.setUri(value);
        } else if (FormatJson.DELTA_WHEN.equals(name)) {
          Date when = parseWhen(value);
          resultDeletedEntry.setWhen(when);
        }
      }
    }
  }

  /**
   * 
   * @param value
   * @return Date
   * @throws EntityProviderException
   */
  private Date parseWhen(final String value) throws EntityProviderException {
    try {
      return EdmDateTimeOffset.getInstance().valueOfString(value, EdmLiteralKind.JSON, null, Date.class);
    } catch (EdmSimpleTypeException e) {
      throw new EntityProviderException(EntityProviderException.INVALID_DELETED_ENTRY_METADATA
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odata2-lib/odata-core/src/main/java/org/apache/olingo/odata2/core/ep/consumer/JsonEntryConsumer.java [173:210]:
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        if (properties.containsKey(name)) {
          throw new EntityProviderException(EntityProviderException.DOUBLE_PROPERTY.addContent(name));
        }
        properties.put(name, propertyValue);
      } else {
        readNavigationProperty(name);
      }
    }
  }

  private void readODataContext() throws IOException, EntityProviderException {
    String contextValue = reader.nextString();
    if (contextValue == null) {
      throw new EntityProviderException(EntityProviderException.MISSING_ATTRIBUTE.addContent(FormatJson.ODATA_CONTEXT)
          .addContent(FormatJson.RESULTS));
    }

    if (contextValue.startsWith(FormatJson.DELTA_CONTEXT_PREFIX)
        && contextValue.endsWith(FormatJson.DELTA_CONTEXT_POSTFIX)) {
      while (reader.hasNext()) {
        ensureDeletedEntryMetadataExists();
        String name = reader.nextName();
        String value = reader.nextString();
        if (FormatJson.ID.equals(name)) {
          resultDeletedEntry.setUri(value);
        } else if (FormatJson.DELTA_WHEN.equals(name)) {
          Date when = parseWhen(value);
          resultDeletedEntry.setWhen(when);
        }
      }
    }
  }

  private Date parseWhen(final String value) throws EntityProviderException {
    try {
      return EdmDateTimeOffset.getInstance().valueOfString(value, EdmLiteralKind.JSON, null, Date.class);
    } catch (EdmSimpleTypeException e) {
      throw new EntityProviderException(EntityProviderException.INVALID_DELETED_ENTRY_METADATA
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