Java tutorial
/* * Copyright (c) 2003 - 2007 OpenSubsystems s.r.o. Slovak Republic. All rights reserved. * * Project: OpenSubsystems * * $Id: MaximumFileFilter.java,v 1.4 2007/01/07 06:14:00 bastafidli Exp $ * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ import java.io.File; import java.io.FilenameFilter; import java.util.Date; /** * File filter implementation to retrieve at most predefined number of files * which are older than specified data * * @version $Id: MaximumFileFilter.java,v 1.4 2007/01/07 06:14:00 bastafidli Exp $ * @author Miro Halas * @code.reviewer Miro Halas * @code.reviewed 1.2 2004/12/18 06:18:25 bastafidli */ public class MaximumFileFilter implements FilenameFilter { // Attributes /////////////////////////////////////////////////////////////// /** * Current number of files in list */ protected int m_currentFileCount = 0; /** * Maximum number of files in output list */ protected int m_iMaximum = 0; /** * Last modification time of file have to be before this date, if it is null, * modification date is not checked */ protected Date m_dtOlderThan; // Constructors ///////////////////////////////////////////////////////////// /** * Constructor with maximum count of file in the output list. * * @param iMax - maximum number of files in output list. If it is 0 length of * @param dtOlderThen - file last modification time heve to by before this * date, if it is null modification time is not checked * output list is unlimited. */ public MaximumFileFilter(int iMax, Date dtOlderThen) { m_iMaximum = iMax; m_dtOlderThan = dtOlderThen; } /** * {@inheritDoc} */ public boolean accept(File dir, String name) { File currentFile = new File(dir, name); if (currentFile.isDirectory()) { return false; } if ((m_dtOlderThan != null) && (currentFile.lastModified() > m_dtOlderThan.getTime())) { return false; } if ((m_iMaximum == 0) || (m_currentFileCount <= m_iMaximum)) { m_currentFileCount++; } return m_currentFileCount <= m_iMaximum; } }