de.axelwernicke.mypod.util
Class FileUtils

java.lang.Object
  de.axelwernicke.mypod.util.FileUtils

public class FileUtils

extends java.lang.Object

Class that provides some helpers related to file operations.

Author:

axel wernicke

Field Summary

static java.util.regex.Pattern

mp3FilePattern Pattern to recognize mp3 files

Method Summary

static long	bufferedCopy(java.io.File source, java.io.File destination, int streamBufferSize, int localBufferSize) Copies file using old io with custom buffered streams
static long	copy(java.io.File source, java.io.File destination) Copies file using nio transfer method.
static boolean	delete(java.io.File file) Deletes a file.
static int	deleteEmptyDirectories(java.util.Vector dirs) Deletes empty directories recursively.
static java.util.Vector	getAllDirectories(java.io.File dir) Gets all subdirectories recursively.
static java.util.Vector	getAllFiles(java.io.File dir, java.util.regex.Pattern filter) Gets all files below the given directory.
FileUtils	getInstance() This is a singleton class, so use getInstance to get in instance :)
static long	getSpaceLeft(java.lang.String path) Determines the space left on a disc The space is determined by executing a native command ( e.g. dir for windows, df for linux ) This is platform dependend, but ther's no solution provided by java :(
static long	getTotalFilesize(java.io.File dir, java.util.regex.Pattern pattern) Gets the total filesize recursively
static boolean	isWritable(java.io.File file, int maxWait) Checks if a file is writable.
static int	makeFileAvailable(java.io.File file) Checks if a file is accessable.
static int	makeFileRWAvailable(java.io.File file) Checks if a file is accessable and writable.
static boolean	move(java.io.File source, java.io.File destination) Moves a file.
static java.lang.String	validateDirectoryName(java.lang.String _filename) Validates a directory name by replacing invalid characters.
static java.lang.String	validateFileName(java.lang.String _filename) Validates a filename by replacing invalid characters.

Methods inherited from class java.lang.Object

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

Field Detail

mp3FilePattern

public static final java.util.regex.Pattern mp3FilePattern

Pattern to recognize mp3 files

Method Detail

getInstance

public FileUtils getInstance()

This is a singleton class, so use getInstance to get in instance :)

Returns:

FileUtils instance

isWritable

public static boolean isWritable(java.io.File file,
                                 int maxWait)

Checks if a file is writable. If its not yet it waits a defined time

Parameters:

file -

maxWait -

Returns:

copy

public static long copy(java.io.File source,
                        java.io.File destination)

Copies file using nio transfer method. Since we get somtimes exceptions, lets try it up to ten times.

Parameters:

source - file

destination - file

Returns:

number of bytes copied

bufferedCopy

public static long bufferedCopy(java.io.File source,
                                java.io.File destination,
                                int streamBufferSize,
                                int localBufferSize)

Copies file using old io with custom buffered streams

Parameters:

streamBufferSize - in bytes

localBufferSize - in bytes

source - file

destination - file

Returns:

number of bytes copied

move

public static boolean move(java.io.File source,
                           java.io.File destination)

Moves a file.
- check parameter
- check if there is something to do
- try to rename file instead physically moving
- if renaming failed, copy using nio transfer method
- if copy succeded, delete source, else delete destination

Parameters:

source - file

destination - file

Returns:

true, if moving succeded

delete

public static boolean delete(java.io.File file)

Deletes a file. If file can not deleted now, its scheduled to be deleted on myPod exit

Parameters:

file - to be deleted

Returns:

true, if file was successfully deleted or scheduled to be deleted on exit.

validateFileName

public static java.lang.String validateFileName(java.lang.String _filename)

Validates a filename by replacing invalid characters. Up to now the validation is for win32 (ntfs)

Parameters:

_filename - to validate

Returns:

validated filename

validateDirectoryName

public static java.lang.String validateDirectoryName(java.lang.String _filename)

Validates a directory name by replacing invalid characters. Up to now the validation is for win32 (ntfs)

Parameters:

_filename - to validate

Returns:

validated directory name

getAllDirectories

public static java.util.Vector getAllDirectories(java.io.File dir)

Gets all subdirectories recursively.

Parameters:

dir - base directory

Returns:

all directories below the base directory

getAllFiles

public static java.util.Vector getAllFiles(java.io.File dir,
                                           java.util.regex.Pattern filter)

Gets all files below the given directory.

Parameters:

filter - file filter that determines the files to find

dir - base directory

Returns:

all files below the base directory as File objects

getTotalFilesize

public static long getTotalFilesize(java.io.File dir,
                                    java.util.regex.Pattern pattern)

Gets the total filesize recursively

Parameters:

dir - to get file size for

pattern - to select files

Returns:

total filesize

getSpaceLeft

public static long getSpaceLeft(java.lang.String path)

Determines the space left on a disc The space is determined by executing a native command ( e.g. dir for windows, df for linux ) This is platform dependend, but ther's no solution provided by java :(

Parameters:

path - path to the disc to get free space for

Returns:

space left on the disc, -1 if determination failed

deleteEmptyDirectories

public static int deleteEmptyDirectories(java.util.Vector dirs)

Deletes empty directories recursively.

makeFileAvailable

public static int makeFileAvailable(java.io.File file)

Checks if a file is accessable.

Parameters:

file - to check

Returns:

GuiUtils.ABORT_OPTION if user aborted

makeFileRWAvailable

public static int makeFileRWAvailable(java.io.File file)

Checks if a file is accessable and writable.

Parameters:

file - to check

Returns:

GuiUtils.ABORT_OPTION if user aborted