Module org.apache.jena.rdfpatch

Package org.apache.jena.rdfpatch.filelog.rotate

Class FileMgr

java.lang.Object

org.apache.jena.rdfpatch.filelog.rotate.FileMgr

public class FileMgr
extends Object

Constructor Summary

Constructors

Constructor	Description
FileMgr()

Method Summary

Modifier and Type	Method	Description
static Path	freshFilename(Path directory, String filename)
static Path	freshFilename(Path directory, String filename, int startingFrom, String sep, String format)	Find a unique file name, assumes that it will not take too many probes.
static Filename	fromPath(Path directory, String fn, Pattern pattern)	Create a Filename
static <X> List<Filename>	scan(Path directory, String namebase, Pattern pattern)	Find files matching a pattern.
static List<Filename>	scanForIncrement(Path directory, String filename)	Look for matching files of the "incremental" pattern: "filename.nnn".
static List<Filename>	scanIncludeBase(Path directory, String filename, Pattern pattern)	Find files matching a pattern and also include the base filename.
static void	shiftFiles(Path directory, String filename)	Shift files with a ".NNN" up by one, and move the base file to "filename.1".
static void	shiftFiles(Path directory, String filename, int increment, String format)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

FileMgr

public FileMgr()

Method Details

freshFilename

public static Path freshFilename(Path directory,
 String filename)

freshFilename

public static Path freshFilename(Path directory,
 String filename,
 int startingFrom,
 String sep,
 String format)

Find a unique file name, assumes that it will not take too many probes. Conceptually, ".0" is the base filename. This function does not create the file. Returns the full file name, directory included.

Parameters:

directory - Directory to look in

filename - Base file name, without index modifer

startingFrom - Begin probing at index

format - String format of the number as modifier e.g. "%03d"

scan

public static <X> List<Filename> scan(Path directory,
 String namebase,
 Pattern pattern)

Find files matching a pattern. The pattern has groups:

• 1 : the base filename.
• 2 : the separator
• 3 : the policy modifier.

Parameters:

directory - Path

namebase - base name of interest

pattern - Regex to extract the part of the filename for a Filename

Returns:

Unsorted List<Filename> of matches.

scanIncludeBase

public static List<Filename> scanIncludeBase(Path directory,
 String filename,
 Pattern pattern)

Find files matching a pattern and also include the base filename.

fromPath

public static Filename fromPath(Path directory,
 String fn,
 Pattern pattern)

Create a Filename

shiftFiles

public static void shiftFiles(Path directory,
 String filename)

Shift files with a ".NNN" up by one, and move the base file to "filename.1".

Parameters:

directory -

filename -

scanForIncrement

public static List<Filename> scanForIncrement(Path directory,
 String filename)

Look for matching files of the "incremental" pattern: "filename.nnn". This includes the filename itself, if it exists.

shiftFiles

public static void shiftFiles(Path directory,
 String filename,
 int increment,
 String format)

Parameters:

directory -

filename -

increment -

format -