/*******************************************************************************
* Copyright 2011-2013 Sergey Tarasevich
*
* 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 cn.link.imageloader.memory;
import java.util.Collection;
/**
* Interface for memory cache
*
* @author Sergey Tarasevich (nostra13[at]gmail[dot]com)
* @since 1.0.0
*/
public interface MemoryCacheAware<K, V> {
/**
* Puts value into cache by key
*
* @return <b>true</b> - if value was put into cache successfully, <b>false</b> - if value was <b>not</b> put into
* cache
*/
boolean put(K key, V value);
/**
* Returns value by key. If there is no value for key then null will be returned.
*/
V get(K key);
/**
* Removes item by key
*/
void remove(K key);
/**
* Returns all keys of cache
*/
Collection<K> keys();
/**
* Remove all items from cache
*/
void clear();
}