/**
* Copyright 2010 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.wave;
import org.waveprotocol.wave.model.util.ReadableMap;
/**
* An observable map.
*
*/
public interface ObservableMap<K, V> extends ReadableMap<K, V>,
SourcesEvents<ObservableMap.Listener<? super K, ? super V>> {
/**
* Observer of map changes.
*/
interface Listener<K, V> {
/**
* Notifies this listener that a map entry has been added.
*/
void onEntryAdded(K key, V value);
/**
* Notifies this listener that a map entry has been removed.
*/
void onEntryRemoved(K key, V value);
}
}