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/src/org/eclipse/core/internal/databinding/ValueBinding.java
if (targetToModelConverter == null) {
				throw new BindingException(
						"Missing target to model converter from " + target.getValueType() + " to " + model.getValueType()); 
			}
			targetValidator = bindSpec.getTargetValidator();
			if (targetValidator == null) {
				throw new BindingException("Missing validator"); 
			}
			targetPartialValidator = bindSpec.getPartialTargetValidator();
			if (targetPartialValidator == null) {
				throw new BindingException("Missing partial validator"); 
			}
			domainValidator = bindSpec.getDomainValidator();
			target.addValueChangeListener(targetChangeListener);
			if (target instanceof IVetoableValue) {
				((IVetoableValue) target)
						.addValueChangingListener(targetChangingListener);
			}
		}
		if (bindSpec.isUpdateTarget()) {
			updateTargetFromModel();
		}
	}
	public void dispose() {
		target.removeValueChangeListener(targetChangeListener);
		if (target instanceof IVetoableValue) {
			((IVetoableValue) target)
					.removeValueChangingListener(targetChangingListener);
		}
		model.removeValueChangeListener(modelChangeListener);