org.cip4.jdflib.util.file
Class RollingFile

java.lang.Object
  java.io.File
      org.cip4.jdflib.util.file.RollingFile

All Implemented Interfaces:

Serializable, Comparable<File>

Direct Known Subclasses:

RollingDateFile

public class RollingFile
extends File

Author:

Dr. Rainer Prosi, Heidelberger Druckmaschinen AG class to generate rolling backup files using a simple .n naming algorithm. The oldest file dies when the maximum number is reached 08.12.2008

See Also:

Serialized Form

Field Summary

protected org.apache.commons.logging.Log

log

Fields inherited from class java.io.File

pathSeparator, pathSeparatorChar, separator, separatorChar

Constructor Summary

RollingFile(String pathname, String baseName)

Method Summary

protected void	calcPos()
protected String	getFileExpression()
File	getNewFile()
protected String	getNewFileName()
File[]	readAll() read all matching files from this
void	setDigits(int digits)

Methods inherited from class java.io.File

canExecute, canRead, canWrite, compareTo, createNewFile, createTempFile, createTempFile, delete, deleteOnExit, equals, exists, getAbsoluteFile, getAbsolutePath, getCanonicalFile, getCanonicalPath, getFreeSpace, getName, getParent, getParentFile, getPath, getTotalSpace, getUsableSpace, hashCode, isAbsolute, isDirectory, isFile, isHidden, lastModified, length, list, list, listFiles, listFiles, listFiles, listRoots, mkdir, mkdirs, renameTo, setExecutable, setExecutable, setLastModified, setReadable, setReadable, setReadOnly, setWritable, setWritable, toString, toURI, toURL

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

log

protected final org.apache.commons.logging.Log log

Constructor Detail

RollingFile

public RollingFile(String pathname,
                   String baseName)

Parameters:

pathname - the base filename

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,

Method Detail

calcPos

protected void calcPos()

readAll

public File[] readAll()

read all matching files from this

Returns:

array of all matching files

getFileExpression

protected String getFileExpression()

Returns:

getNewFile

public File getNewFile()

Returns:

the file to write, null if error occurred

getNewFileName

protected String getNewFileName()

Returns:

the file to write, i.e. this

setDigits

public void setDigits(int digits)

Parameters:

digits - the digits to set