AbstractModel.java

/**
 * Copyright (C) 2011 Brian Ferris <bdferris@onebusaway.org>
 *
 * 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.onebusaway.webapp.gwt.common.model;

import java.util.ArrayList;
import java.util.List;

public class AbstractModel<T> implements ModelEventSourceAndSink<T>{

  private List<ModelListener<T>> _listeners = new ArrayList<ModelListener<T>>();

  public void addModelListener(ModelListener<T> listener) {
    _listeners.add(listener);
  }

  public void removeModelListener(ModelListener<T> listener) {
    _listeners.remove(listener);
  }

  public void fireModelChange(T model) {
    for (ModelListener<T> listener : _listeners)
      listener.handleUpdate(model);
  }

}