Bug 147530 [DataBinding] Provide event objects for change listeners
Before data binding goes 1.0 it would be wise to provide EventObjects for the following listeners to ensure that the API doesn't preclude future expansion of the values supplied to listeners. Interfaces that would be affected: * IValueChangeListener * IValueChangingListener * IListChangeListener * ISetChangeListener * IMappingChangeListener
bundles/org.eclipse.core.databinding.observable/src/org/eclipse/core/databinding/observable/set/MappedSet.java
for (Iterator it = diff.getAddedKeys().iterator(); it.hasNext();) {
				Object key = it.next();
				Object newValue = diff.getNewValue(key);
				if (handleAddition(newValue)) {
					additions.add(newValue);
				}
			}
			fireSetChange(Diffs.createSetDiff(additions, removals));
		}
	};
	private IObservableSet input;
	/**
	 * @param input
	 * @param map
	 */
	public MappedSet(IObservableSet input, IObservableMap map) {
		super(input.getRealm(), Collections.EMPTY_SET, Object.class);
		setWrappedSet(valueCounts.keySet());
		this.wrappedMap = map;
		this.input = input;
		for (Iterator it = input.iterator(); it.hasNext();) {
			Object element = it.next();
			Object functionValue = wrappedMap.get(element);
			handleAddition(functionValue);
		}
		input.addSetChangeListener(domainListener);
		map.addMapChangeListener(mapChangeListener);
	}
	/**
	 * @param mapValue