001    /**
002     * Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
003     *
004     * The contents of this file are subject to the terms of the Liferay Enterprise
005     * Subscription License ("License"). You may not use this file except in
006     * compliance with the License. You can obtain a copy of the License by
007     * contacting Liferay, Inc. See the License for the specific language governing
008     * permissions and limitations under the License, including but not limited to
009     * distribution rights of the Software.
010     *
011     *
012     *
013     */
014    
015    package com.liferay.portal.util;
016    
017    import com.liferay.portal.kernel.concurrent.ConcurrentLFUCache;
018    
019    import java.io.File;
020    
021    /**
022     * @author Igor Spasic
023     */
024    public class LimitedFilesCache<T> {
025    
026            public LimitedFilesCache(int maxSize) {
027                    _fileRemovingLFUCache = new FileRemovingLFUCache<T>(maxSize);
028            }
029    
030            public File get(T key) {
031                    return _fileRemovingLFUCache.get(key);
032            }
033    
034            public void put(T key) {
035                    _fileRemovingLFUCache.put(key, null);
036            }
037    
038            public void put(T key, File file) {
039                    _fileRemovingLFUCache.put(key, file);
040            }
041    
042            private FileRemovingLFUCache<T> _fileRemovingLFUCache;
043    
044            private class FileRemovingLFUCache<K> extends ConcurrentLFUCache<K, File> {
045    
046                    public FileRemovingLFUCache(int maxSize) {
047                            super(maxSize);
048                    }
049    
050                    @Override
051                    protected void onRemove(K key, File cachedFile) {
052                            if (cachedFile != null) {
053                                    cachedFile.delete();
054                            }
055                            else {
056                                    File file = new File(key.toString());
057    
058                                    file.delete();
059                            }
060                    }
061    
062            }
063    
064    }