| /******************************************************************************* |
| * Copyright (c) 2000, 2013 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.aspectj.org.eclipse.jdt.internal.core.util; |
| |
| import java.util.Enumeration; |
| |
| /** |
| * The <code>ICacheEnumeration</code> is used to iterate over both the keys |
| * and values in an LRUCache. The <code>getValue()</code> method returns the |
| * value of the last key to be retrieved using <code>nextElement()</code>. |
| * The <code>nextElement()</code> method must be called before the |
| * <code>getValue()</code> method. |
| * |
| * <p>The iteration can be made efficient by making use of the fact that values in |
| * the cache (instances of <code>LRUCacheEntry</code>), know their key. For this reason, |
| * Hashtable lookups don't have to be made at each step of the iteration. |
| * |
| * <p>Modifications to the cache must not be performed while using the |
| * enumeration. Doing so will lead to an illegal state. |
| * |
| * @see LRUCache |
| */ |
| @SuppressWarnings("rawtypes") |
| 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(); |
| } |