/*******************************************************************************
* Copyright (c) 2000, 2003 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package net.sourceforge.phpdt.internal.core.util;
import java.util.Enumeration;
/**
* The ICacheEnumeration
is used to iterate over both the keys
* and values in an LRUCache. The getValue()
method returns the
* value of the last key to be retrieved using nextElement()
.
* The nextElement()
method must be called before the
* getValue()
method.
*
*
* The iteration can be made efficient by making use of the fact that values in
* the cache (instances of LRUCacheEntry
), know their key. For
* this reason, Hashtable lookups don't have to be made at each step of the
* iteration.
*
*
* Modifications to the cache must not be performed while using the enumeration. * Doing so will lead to an illegal state. * * @see LRUCache */ public interface ICacheEnumeration extends Enumeration { /** * Returns the value of the previously accessed key in the enumeration. Must * be called after a call to nextElement(). * * @return Value of current cache entry */ public Object getValue(); }