/**
* Copyright 2009 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package org.waveprotocol.wave.model.adt;
import org.waveprotocol.wave.model.wave.SourcesEvents;
/**
* An extension of the element list that broadcasts events whenever the state of
* the list changes.
*
*/
public interface ObservableElementList<T, I> extends ElementList<T, I>,
SourcesEvents<ObservableElementList.Listener<T>> {
/**
* Defines the methods of the listener to element list events.
*/
public interface Listener<T> {
/**
* @param entry A new value that was added to this list.
*/
void onValueAdded(T entry);
/**
* @param entry An existing value that was removed from the list.
*/
void onValueRemoved(T entry);
}
}