/*
* 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.memento;
import java.util.HashMap;
import java.util.Map;
/**
* Memento.
*
* @author Lubing Zhang
*
*/
public class Caretaker {
private Map<String, IMemento> mementos = new HashMap<String, IMemento>();
public IMemento getMemento(String key) {
return this.mementos.get(key);
}
public void setMemento(String key, IMemento memento) {
if (mementos.size() > 20) {
System.out.println("Has too many mementos.");
} else {
this.mementos.put(key, memento);
}
}
public void clear() {
this.mementos.clear();
}
public IMemento remove(String key) {
return this.mementos.remove(key);
}
}