/*
* The MIT License
*
* Copyright (c) 2012, Lubing Zhang.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package com.github.zhanglubing.designpattern.flyweight;
import java.util.HashMap;
import java.util.Map;
/**
* Flyweight.
*
* @author Lubing Zhang
*
*/
public class FlyweightFactory {
private static Map<Object, ConcreteFlyweight> pool = new HashMap<Object, ConcreteFlyweight>();
private FlyweightFactory() {
// Don't instance me.
}
public static ConcreteFlyweight getInstance(String key) {
ConcreteFlyweight flyweight = null;
if (pool.containsKey(key)) {
flyweight = pool.get(key);
} else {
System.out.println("create an instance.");
flyweight = new ConcreteFlyweight(key);
pool.put(key, flyweight);
}
return flyweight;
}
}