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 Summary

Modifier and Type	Method and Description
void	add(ConfigurationNode key, Object value) Store data for object.
<T> T	get(ConfigurationNode key, Class<T> type) Get meta data for object
<T> T	remove(ConfigurationNode key, Class<T> type)

Method Detail

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