/*
* $Id$
*
* License Agreement.
*
* Rich Faces - Natural Ajax for Java Server Faces (JSF)
*
* Copyright (C) 2007 Exadel, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.richfaces.cdk.model;
import java.util.TreeMap;
/**
* <p class="changed_added_4_0">
* </p>
*
* @author asmirnov@exadel.com
*
*/
public class ModelMap<K, E extends ModelElement<? super E>> extends TreeMap<K, E> {
public static <I, T extends ModelElement<? super T>> ModelMap<I, T> create() {
return new ModelMap<I, T>();
}
/**
* <p class="changed_added_4_0">
* </p>
*
* @param key
* @param value
* @return
* @see java.util.Map#put(java.lang.Object, java.lang.Object)
*/
public E put(K key, E value) {
E oldValue = get(key);
if (null != oldValue) {
oldValue.merge(value);
} else {
super.put(key, value);
}
return oldValue;
}
}