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CIP4 JDF Library for JDF 1.x
/*
* The CIP4 Software License, Version 1.0
*
*
* Copyright (c) 2001-2022 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 RollingBackupFile extends File
{
private final int nBackup;
boolean wantExtension;
private final String start;
/**
* @param wantExtension the wantExtension to set
*/
public void setWantExtension(final boolean wantExtension)
{
this.wantExtension = wantExtension;
}
/**
* @param pathname the base filename
* @param nBackupp the number of backups to retain
*/
public RollingBackupFile(final String pathname, final int nBackupp)
{
super(pathname);
this.nBackup = nBackupp;
wantExtension = false;
start = UrlUtil.prefix(UrlUtil.urlToFileName(pathname));
}
/**
* @param file the base file
* @param nBackupp the number of backups to retain
*/
public RollingBackupFile(final File file, final int nBackupp)
{
this(file.getPath(), nBackupp);
}
/**
* @return the file to write, i.e. this
*/
public File getNewFile()
{
final String extension = FileUtil.getExtension(this);
return getNewFile(extension);
}
/**
*
* get a new file for a given extension
*
* @param extension
* @return
*/
public File getNewFile(final String extension)
{
return init(extension);
}
/**
* @param i the index of the file to read
* @return the file to read, with backup
*/
public File getOldFile(final int i)
{
if (i == 0)
return this;
if (i < 0 || i >= nBackup)
return null;
final File[] oldFiles = FileUtil.listFilesWithExpression(getParentFile(), UrlUtil.newExtension(getName(), null) + "." + i + ".*");
if (oldFiles == null || oldFiles.length == 0)
return null;
return oldFiles[0];
}
String getExtension(final File f)
{
final String name = f.getName();
if (name.startsWith(start))
{
String ext = name.substring(start.length() + 1);
final StringArray extA = StringArray.getVString(ext, ".");
if (!StringUtil.isEmpty(extA) && StringUtil.isInteger(extA.get(0)))
{
ext = StringUtil.removeToken(ext, 0, ".");
}
return StringUtil.getNonEmpty(ext);
}
return null;
}
/**
* remove all files, including main file
*/
public void clearAll()
{
final File[] oldFiles = FileUtil.listFilesWithExpression(getParentFile(), UrlUtil.newExtension(getName(), null) + "*");
if (oldFiles != null)
{
for (final File lastFile : oldFiles)
{
lastFile.delete();
}
}
}
/**
* the big simple rolling method
*/
private synchronized File init(final String extension)
{
String pathname = getPath();
pathname = UrlUtil.newExtension(pathname, extension);
final HashMap map = getNameMap();
if (!map.isEmpty())
{
for (int i = nBackup; i > 0; i--)
{
final File newFile = map.get(Integer.valueOf(i - 1));
if (newFile != null)
{
final File oldFile = map.get(Integer.valueOf(i));
if (oldFile != null && oldFile.exists())
{
oldFile.delete();
}
final File newFileRenamed = new File(getPathFor(newFile.getAbsolutePath(), i));
newFile.renameTo(newFileRenamed);
}
}
}
return new File(pathname);
}
/**
*
* @return
*/
private HashMap getNameMap()
{
final String myExt = FileUtil.getExtension(this);
String expression = UrlUtil.newExtension(getName(), null) + "*";
if (wantExtension && StringUtil.getNonEmpty(myExt) != null)
{
expression += "." + myExt;
}
final File[] oldFiles = FileUtil.listFilesWithExpression(getParentFile(), expression);
final HashMap map = new HashMap<>();
if (oldFiles != null)
{
for (final File file : oldFiles)
{
final String ext = getExtension(file);
if (ext != null)
{
final String name = file.getName();
final int nDot = StringUtil.numSubstrings(ext, ".");
final String delta = StringUtil.token(name, -2 - nDot, ".");
final int i = StringUtil.parseInt(delta, -1);
if (i >= 0)
{
map.put(Integer.valueOf(i), file);
}
else
{
map.put(Integer.valueOf(0), file);
}
}
}
}
return map;
}
/**
* @param pathname
* @param extension
* @param i
* @return
*/
private String getPathFor(final String pathname, final int i)
{
final String base = i == 0 ? "" : "." + i;
final String oldbase = i <= 1 ? "" : "." + (i - 1);
final String extension = getExtension(new File(pathname));
final String oldExtension = oldbase + ((extension == null) ? "" : "." + extension);
final String newExtension = base + ((extension == null) ? "" : "." + extension);
return StringUtil.replaceString(pathname, oldExtension, newExtension);
}
/**
*
*/
private static final long serialVersionUID = 1521423479897L;
}
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