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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.commons.vfs.cache;
18  
19  import org.apache.commons.vfs.FileObject;
20  
21  import java.lang.ref.Reference;
22  import java.lang.ref.ReferenceQueue;
23  import java.lang.ref.WeakReference;
24  
25  /***
26   * This implementation caches every file as long as it is strongly reachable by
27   * the java vm. As soon as the object is no longer reachable it will be discarded.
28   * In contrast to the SoftRefFilesCache this implementation might free resources faster
29   * as it don't wait until a memory limitation.
30   * 
31   * @author <a href="mailto:imario@apache.org">Mario Ivankovits</a>
32   * @version $Revision: 485638 $ $Date: 2005-09-30 09:02:41 +0200 (Fr, 30 Sep
33   *          2005) $
34   * @see java.lang.ref.WeakReference
35   */
36  public class WeakRefFilesCache extends SoftRefFilesCache
37  {
38  	protected Reference createReference(FileObject file, ReferenceQueue refqueue)
39  	{
40  		return new WeakReference(file, refqueue);
41  	}
42  }