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1   /********************************************************************************
2    *InternetCafe is a software solution that helps the management of Cybercafes 
3    * according with the ITALIAN DECREE LAW ON ANTI-TERROR MEASURES, 27 JULY 2005.
4    * Copyright (C) 2006  Guido Angelo Ingenito
5   
6    * This program is free software; you can redistribute it and/or
7    * modify it under the terms of the GNU General Public License
8    * as published by the Free Software Foundation; either version 2
9    * of the License, or (at your option) any later version.
10  
11   * This program is distributed in the hope that it will be useful,
12   * but WITHOUT ANY WARRANTY; without even the implied warranty of
13   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14   * GNU General Public License for more details.
15   * 
16   * You should have received a copy of the GNU General Public License
17   * along with this program; if not, write to the Free Software
18   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
19   *******************************************************************************/
20  
21  package base.jdbs;
22  
23  import java.io.File;
24  
25  import org.apache.log4j.Logger;
26  
27  import base.util.FileUtil;
28  
29  /***
30   * @author skunk
31   * 
32   */
33  public class FileDescriptor {
34  
35  	private static final transient Logger logger = Logger
36  			.getLogger(FileDescriptor.class.getName());
37  
38  	private long lastModified = -1;
39  
40  	private long size = -1;
41  
42  	private final File file;
43  
44  	public FileDescriptor(File file) {
45  		this.file = file;
46  		this.lastModified = file.lastModified();
47  	}
48  
49  	/***
50  	 * @return Returns the file.
51  	 */
52  	public File getFile() {
53  		return file;
54  	}
55  
56  	/***
57  	 * @return Returns the size.
58  	 */
59  	public long getSize() {
60  		if (size == -1 || file.lastModified() > lastModified) {
61  			this.size = FileUtil.fileSizeInKB(file);
62  			lastModified = file.lastModified();
63  		}
64  		return size;
65  	}
66  }