/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.ode.il.cache;

import java.util.Collection;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;

import org.apache.ode.bpel.iapi.Cache;

/**
 * Cache implemented by using ConcurrentHashMap.
 * 
 * @author jeffyu
 *
 */
public class HashMapCache<K, V> implements Cache<K, V> {
	
	private ConcurrentHashMap<K, V> map = new ConcurrentHashMap<K, V>();
	
	public V put(K key, V value) {
		return map.put(key, value);
	}

	public V get(K key) {
		return map.get(key);
	}

	public V remove(K key) {
		return map.remove(key);
	}
	
	public boolean containsKey(K key) {
		return map.containsKey(key);
	}
	
	public Set<K> keySet() {
		return map.keySet();
	}
	
	public Collection<V> values() {
		return map.values();
	}
	
}