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CacheTest.java
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alfresco-community-repo/source/java/org/alfresco/repo/cache/NullCache.java

81 lines
2.3 KiB
Java

/*
* Copyright (C) 2005-2007 Alfresco Software Limited.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* As a special exception to the terms and conditions of version 2.0 of
* the GPL, you may redistribute this Program in connection with Free/Libre
* and Open Source Software ("FLOSS") applications as described in Alfresco's
* FLOSS exception. You should have recieved a copy of the text describing
* the FLOSS exception, and it is also available here:
* http://www.alfresco.com/legal/licensing"
*/
package org.alfresco.repo.cache;
import java.io.Serializable;
import java.util.Collection;
import java.util.Collections;
/**
* A cache that does nothing - always.
* <P/>
* There are conditions under which code that expects to be caching, should not be. Using this
* cache, it becomes possible to configure a valid cache in whilst still ensuring that the
* actual caching is not performed.
*
* @author Derek Hulley
*/
public class NullCache<K extends Serializable, V extends Object> implements SimpleCache<K, V>
{
public NullCache()
{
}
/** NO-OP */
public boolean contains(K key)
{
return false;
}
public Collection<K> getKeys()
{
return Collections.<K>emptyList();
}
/** NO-OP */
public V get(K key)
{
return null;
}
/** NO-OP */
public void put(K key, V value)
{
return;
}
/** NO-OP */
public void remove(K key)
{
return;
}
/** NO-OP */
public void clear()
{
return;
}
}