VFS-2.0-RC1/core/src/main/java/org/apache/commons/vfs/cache/WeakRefFilesCache.java

/*
 * 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.apache.commons.vfs.cache;

import org.apache.commons.vfs.FileObject;

import java.lang.ref.Reference;
import java.lang.ref.ReferenceQueue;
import java.lang.ref.WeakReference;

/**
 * This implementation caches every file as long as it is strongly reachable by
 * the java vm. As soon as the object is no longer reachable it will be discarded.
 * In contrast to the SoftRefFilesCache this implementation might free resources faster
 * as it don't wait until a memory limitation.
 *
 * @author <a href="mailto:imario@apache.org">Mario Ivankovits</a>
 * @version $Revision$ $Date: 2005-09-30 09:02:41 +0200 (Fr, 30 Sep
 *          2005) $
 * @see java.lang.ref.WeakReference
 */
public class WeakRefFilesCache extends SoftRefFilesCache
{
    protected Reference createReference(FileObject file, ReferenceQueue refqueue)
    {
        return new WeakReference(file, refqueue);
    }
}