com.limegroup.gnutella.util
Class FileUtils

java.lang.Object
  com.limegroup.gnutella.util.FileUtils

public class FileUtils

extends java.lang.Object

This class provides static functions to load/store the files.

Constructor Summary

FileUtils()

Method Summary

static java.io.File	getCanonicalFile(java.io.File f) Same as f.getCanonicalFile() in JDK1.3.
static java.lang.String	getFileExtension(java.io.File f) Utility method that returns the file extension of the given file.
static java.io.File	getParentFile(java.io.File f) Same as f.getParentFile() in JDK1.3.
static java.io.File[]	listFiles(java.io.File f) Same as the f.listFiles() in JDK1.3.
static java.io.File[]	listFiles(java.io.File f, java.io.FilenameFilter filter) Same as f.listFiles(FileNameFilter) in JDK1.2
static java.util.Map	readMap(java.lang.String filename) Reads the map stored, in serialized object form, in the passed file and returns it.
static boolean	setWriteable(java.io.File f) Utility method to set a file as non read only.
static void	writeMap(java.lang.String filename, java.util.Map map) Writes the passed map to corresponding file

Methods inherited from class java.lang.Object

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

Constructor Detail

FileUtils

public FileUtils()

Method Detail

writeMap

public static void writeMap(java.lang.String filename,
                            java.util.Map map)
                     throws java.io.IOException,
                            java.lang.ClassNotFoundException

Writes the passed map to corresponding file

Parameters:

filename - The name of the file to which to write the passed map

map - The map to be stored

Throws:

java.io.IOException

java.lang.ClassNotFoundException

readMap

public static java.util.Map readMap(java.lang.String filename)
                             throws java.io.IOException,
                                    java.lang.ClassNotFoundException

Reads the map stored, in serialized object form, in the passed file and returns it. from the file where it is stored

Parameters:

filename - The file from where to read the Map

Returns:

The map that was read

Throws:

java.io.IOException

java.lang.ClassNotFoundException

listFiles

public static java.io.File[] listFiles(java.io.File f)

Same as the f.listFiles() in JDK1.3.

listFiles

public static java.io.File[] listFiles(java.io.File f,
                                       java.io.FilenameFilter filter)

Same as f.listFiles(FileNameFilter) in JDK1.2

getParentFile

public static java.io.File getParentFile(java.io.File f)

Same as f.getParentFile() in JDK1.3.

getCanonicalFile

public static java.io.File getCanonicalFile(java.io.File f)
                                     throws java.io.IOException

Same as f.getCanonicalFile() in JDK1.3.

Throws:

java.io.IOException

getFileExtension

public static java.lang.String getFileExtension(java.io.File f)

Utility method that returns the file extension of the given file.

Parameters:

f - the File instance that the extension should be extracted from

Returns:

the file extension string, or null if the extension could not be extracted

setWriteable

public static boolean setWriteable(java.io.File f)

Utility method to set a file as non read only. If the file is already writable, does nothing.

Parameters:

f - the File instance whose read only flag should be unset.