/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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;
/**
* An object that emits events to registered listeners.
*
*
*/
public interface SourcesEvents<Listener> {
/**
* Adds a listener. If the listener is already registered on this object,
* this method has no effect.
*
* @param listener listener to add
*/
void addListener(Listener listener);
/**
* Removes a listener. If the listener is not already registered on this
* object, this method has no effect.
*
* @param listener listener to remove
*/
void removeListener(Listener listener);
}