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CIP4 JDF Library for JDF 1.x
/*
* The CIP4 Software License, Version 1.0
*
*
* Copyright (c) 2001-2024 The International Cooperation for the Integration of
* Processes in Prepress, Press and Postpress (CIP4). All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* The International Cooperation for the Integration of
* Processes in Prepress, Press and Postpress (www.cip4.org)"
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "CIP4" and "The International Cooperation for the Integration of
* Processes in Prepress, Press and Postpress" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact [email protected].
*
* 5. Products derived from this software may not be called "CIP4",
* nor may "CIP4" appear in their name, without prior written
* permission of the CIP4 organization
*
* Usage of this software in commercial products is subject to restrictions. For
* details please consult [email protected].
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE INTERNATIONAL COOPERATION FOR
* THE INTEGRATION OF PROCESSES IN PREPRESS, PRESS AND POSTPRESS OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the The International Cooperation for the Integration
* of Processes in Prepress, Press and Postpress and was
* originally based on software
* copyright (c) 1999-2001, Heidelberger Druckmaschinen AG
* copyright (c) 1999-2001, Agfa-Gevaert N.V.
*
* For more information on The International Cooperation for the
* Integration of Processes in Prepress, Press and Postpress , please see
* .n naming algorithm.
*
* The oldest file dies when the maximum number is reached
*
* 08.12.2008
*/
public class RollingFile extends File
{
private final AtomicInteger pos;
private final String base;
private final String ext;
private int digits;
/**
* @param pathname the base filename
* @param baseName the name of the base file,
* if a filename with double "." , e.g. xxx..txt is specified, the algorithm will generate names such as xxx.000001.txt,
* if a single "." e.g. xxx.txt is specified, the algorithm will generate names such as xxx000001.txt,
*/
public RollingFile(final String pathname, final String baseName)
{
super(pathname);
ext = UrlUtil.extension(baseName);
base = UrlUtil.prefix(baseName);
digits = 6;
pos = new AtomicInteger(calcPos());
mkdirs();
}
/**
* @return
*
*/
protected int calcPos()
{
final File[] list = readAll();
int p = 0;
if (list == null)
return p;
for (final File f : list)
{
String name = f.getName();
name = UrlUtil.newExtension(name, null);
if (base != null)
name = name.substring(base.length());
final int n = StringUtil.parseInt(name, -1);
if (n > p)
{
p = n;
}
}
return p;
}
/**
* read all matching files from this
*
* @return array of all matching files
*/
public File[] readAll()
{
final String expression = getFileExpression();
final File[] list = FileUtil.listFilesWithExpression(this, expression);
if (list != null)
Arrays.sort(list);
return list;
}
/**
* @return
*/
protected String getFileExpression()
{
String expression = "(.)*";
if (base != null)
expression = base + expression;
if (ext != null)
expression = expression + "." + ext;
return expression;
}
/**
* @return the file to write, null if error occurred
*/
public File getNewFile()
{
File file = FileUtil.getFileInDirectory(this, new File(getNewFileName()));
if (!file.exists())
{
try
{
file.createNewFile();
}
catch (final IOException x)
{
file = null;
}
}
return file;
}
/**
* @return the file to write, i.e. this
*/
protected String getNewFileName()
{
String exp = getFileExpression();
exp = StringUtil.replaceString(exp, "(.)*", "%0" + digits + "d");
exp = StringUtil.sprintf(exp, "" + pos.incrementAndGet());
return exp;
}
/**
*
*/
private static final long serialVersionUID = 1521423479897L;
/**
* @param digits the digits to set
*/
public void setDigits(final int digits)
{
this.digits = digits;
}
}
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