/* AbstractMapModel.java
{{IS_NOTE
Purpose:
Description:
History:
Thu Jul 10 13:06:36 2008, Created by henrichen
}}IS_NOTE
Copyright (C) 2008 Potix Corporation. All Rights Reserved.
{{IS_RIGHT
This program is distributed under GPL Version 2.0 in the hope that
it will be useful, but WITHOUT ANY WARRANTY.
}}IS_RIGHT
*/
package org.zkoss.gmaps;
import java.util.Collection;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import org.zkoss.gmaps.event.MapDataEvent;
import org.zkoss.gmaps.event.MapDataListener;
import org.zkoss.io.Serializables;
/**
* A skeletal implementation for {@link MapModel}.
* @author henrichen
* @since 2.0_9
*/
abstract public class AbstractMapModel implements MapModel, java.io.Serializable {
private static final long serialVersionUID = 200807101306L;
private transient List _listeners = new LinkedList();
/** Fires a {@link MapDataEvent} for all registered listener
* (thru {@link #addMapDataListener}.
*
* <p>Note: you can invoke this method only in an event listener.
* @param type the {@link MapDataEvent} type
* @param items the items to be processed
*/
protected void fireEvent(int type, Collection items) {
final MapDataEvent evt = new MapDataEvent(this, type, items);
for (Iterator it = _listeners.iterator(); it.hasNext();)
((MapDataListener)it.next()).onChange(evt);
}
//-- MapModel --//
public void addMapDataListener(MapDataListener listener) {
if (listener == null)
throw new NullPointerException();
_listeners.add(listener);
}
public void removeMapDataListener(MapDataListener listener) {
_listeners.remove(listener);
}
//Serializable//
private synchronized void writeObject(java.io.ObjectOutputStream s)
throws java.io.IOException {
s.defaultWriteObject();
Serializables.smartWrite(s, _listeners);
}
private synchronized void readObject(java.io.ObjectInputStream s)
throws java.io.IOException, ClassNotFoundException {
s.defaultReadObject();
_listeners = new LinkedList();
Serializables.smartRead(s, _listeners);
}
}