package edu.northwestern.at.utils.cache;
/* Please see the license information at the end of this file. */
/** A dummy cache that doesn't cache anything..
*/
public class DummyCache<K, V> implements Cache<K, V>
{
/** Clear all entries in the cache.
*/
public void clear()
{
}
/** True if cache contains a specified key.
*
* @param key The key to look up.
*
* @return true if the cache contains the key.
*/
public boolean containsKey( K key )
{
return false;
}
/** Retrieve a cached value.
*
* @param key The key of the entry to retrieve.
*
* @return The value of the cached entry specified by key;
* null if the cache does not contain the key.
*/
public V get( K key )
{
return null;
}
/** Add or replace a cached value.
*
* @param key The key of the entry to add.
* @param value The value of the entry to add.
*
* @return The value of any existing cached entry specified
* by the key; null if the cache does not contain
* the key.
*/
public V put( K key , V value )
{
return null;
}
/** Remove a specific entry from the cache.
*
* @param key The key of the entry to remove.
*
* @return The entry removed, or null if none.
*/
public V remove( K key )
{
return null;
}
/** Return current size of cache.
*
* @return Number of entries (keys) currently stored in cache.
*/
public int size()
{
return 0;
}
}
/*
Copyright (c) 2008, 2009 by Northwestern University.
All rights reserved.
Developed by:
Academic and Research Technologies
Northwestern University
http://www.it.northwestern.edu/about/departments/at/
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal with the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or
sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following
conditions:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimers.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following
disclaimers in the documentation and/or other materials provided
with the distribution.
* Neither the names of Academic and Research Technologies,
Northwestern University, nor the names of its contributors may be
used to endorse or promote products derived from this Software
without specific prior written permission.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE CONTRIBUTORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.
*/