instancecache.java

一个非常好的FRAMWRK!是一个外国组织做的!不!

/*
 * Copyright 2003-2005 the original author or authors.
 * 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 com.jdon.controller.cache;

import java.util.HashMap;
import java.util.Map;

import com.jdon.container.pico.Startable;
import com.jdon.util.Debug;

/**
 * simple instance cache
 * this class can be used cache some components.
 * @author <a href="mailto:[e-mail]">banq</a>
 *
 */
public class InstanceCache implements Startable{
    public final static String NAME = "InstanceCache";
    
    private Map pool = new HashMap();
         
    public void start(){
        
    }
    
    public void stop(){
        pool.clear();
    }

    /* (non-Javadoc)
     * @see com.jdon.controller.cache.Cache#get(java.lang.Object)
     */
    public Object get(Object key) {
        return pool.get(key);
    }

    /* (non-Javadoc)
     * @see com.jdon.controller.cache.Cache#put(java.lang.Object, java.lang.Object)
     */
    public void put(Object key, Object value) {
        pool.put(key, value);
    }

    /* (non-Javadoc)
     * @see com.jdon.controller.cache.Cache#remove(java.lang.Object)
     */
    public void remove(Object key) {
        pool.remove(key);
    }

    /* (non-Javadoc)
     * @see com.jdon.controller.cache.Cache#size()
     */
    public long size() {
        return pool.size();
    }

    /* (non-Javadoc)
     * @see com.jdon.controller.cache.Cache#clear()
     */
    public void clear() {
        pool.clear();
    }

    /* (non-Javadoc)
     * @see com.jdon.controller.cache.Cache#contain(java.lang.Object)
     */
    public boolean contain(Object key) {
        return pool.containsKey(key);
    }

}