|
/*
* 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;
}
}
|