Package org.apache.cayenne.configuration.xml

Interface DataChannelMetaData

All Known Implementing Classes:
DefaultDataChannelMetaData, NoopDataChannelMetaData
public interface DataChannelMetaData

Storage for all kind of meta data that is not required for runtime.

Currently used by Modeler and cli tools (e.g. Maven, Ant and Gradle) to store project extra data.

Usage: 

      // attach custom information to data map
      metaData.add(dataMap, myObject);

      // read data
      MyObject obj = metaData.get(dataMap, MyObject.class);

Since:
4.1

  • Method Details

    • add

      void add(ConfigurationNode key, Object value)
      Store data for object.
      Parameters:
      key - object for which we want to store data
      value - data to store

    • get

      <T> T get(ConfigurationNode key, Class<T> type)
      Get meta data for object
      Type Parameters:
      T - meta data type
      Parameters:
      key - object for wich we want meta data
      type - meta data type class
      Returns:
      value or null if no data available

    • remove

      <T> T remove(ConfigurationNode key, Class<T> type)
      Type Parameters:
      T - meta data type
      Parameters:
      key - object for wich we want meta data
      type - meta data type class
      Returns:
      value or null if no can't remove
      Since:
      4.1