/* | |
* 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.jsecurity.cache; | |
import java.util.*; | |
/** | |
* An implementation of the JSecurity {@link Cache} interface that uses a | |
* {@link Hashtable} to store cached objects. This implementation is only suitable for | |
* development/testing use. A more robust caching solution should be used for production | |
* systems such as the {@link org.jsecurity.cache.ehcache.EhCacheManager} | |
* | |
* @author Jeremy Haile | |
* @author Les Hazlewood | |
* @since 0.2 | |
*/ | |
@SuppressWarnings("unchecked") | |
public class HashtableCache implements Cache { | |
/** | |
* The underlying hashtable. | |
*/ | |
private final Map hashtable = new Hashtable(); | |
/** | |
* The name of this cache. | |
*/ | |
private final String name; | |
/** | |
* Creates a new cache with the given name. | |
* | |
* @param name the name of this cache. | |
*/ | |
public HashtableCache(String name) { | |
this.name = name; | |
} | |
public Object get(Object key) throws CacheException { | |
return hashtable.get(key); | |
} | |
public void put(Object key, Object value) throws CacheException { | |
hashtable.put(key, value); | |
} | |
public void remove(Object key) throws CacheException { | |
hashtable.remove(key); | |
} | |
public void clear() throws CacheException { | |
hashtable.clear(); | |
} | |
public int size() { | |
return hashtable.size(); | |
} | |
public Set keys() { | |
if (!hashtable.isEmpty()) { | |
return Collections.unmodifiableSet(hashtable.keySet()); | |
} else { | |
return Collections.EMPTY_SET; | |
} | |
} | |
public Set values() { | |
if (!hashtable.isEmpty()) { | |
Collection values = hashtable.values(); | |
if (values instanceof Set) { | |
return Collections.unmodifiableSet((Set) values); | |
} else { | |
return Collections.unmodifiableSet(new LinkedHashSet(values)); | |
} | |
} else { | |
return Collections.EMPTY_SET; | |
} | |
} | |
public String toString() { | |
return "HashtableCache [" + name + "]"; | |
} | |
} |