/*
 * 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.vfs2.cache;

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

import org.apache.commons.vfs2.FileObject;

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.
See Also:
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.
 *
 * @see java.lang.ref.WeakReference
 */
public class WeakRefFilesCache extends SoftRefFilesCache {

    @Override
    protected Reference<FileObject> createReference(final FileObject file, final ReferenceQueue<FileObject> refqueue) {
        return new WeakReference<>(file, refqueue);
    }
}