co.codewizards.cloudstore.core.oio

Class IoFileUtil

java.lang.Object

co.codewizards.cloudstore.core.oio.IoFileUtil

public class IoFileUtil
extends Object

Author:

Sebastian Schefczyk

Method Summary

Modifier and Type	Method and Description
static IoFile	castOrFail(File file)
protected static void	checkRenameDir(File fromDir, File toDir) Before starting a moveRecursively operation, which will make use of the File.renameTo method, it is useful to determine, whether this is possible or not.
static File	createTempDirectory(String prefix) Discussion for best solution: http://stackoverflow.com/questions/617414/create-a-temporary-directory-in-java
static File	createTempFile(String prefix, String suffix)
static File	createTempFile(String prefix, String suffix, File dir)
static File	getIoFile(File file)
static File[]	listRoots()
static void	moveRecursively(File fromDir, File toDir) Directories will be created/deleted, files renamed.
static File	newFileNameForRenameTo(File fromDir, File toDir, File current)

Methods inherited from class java.lang.Object

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

Method Detail

createTempDirectory

public static File createTempDirectory(String prefix)
                                throws IOException

Discussion for best solution: http://stackoverflow.com/questions/617414/create-a-temporary-directory-in-java

Throws:

IOException

createTempFile

public static File createTempFile(String prefix,
                                  String suffix)
                           throws IOException

Throws:

IOException

createTempFile

public static File createTempFile(String prefix,
                                  String suffix,
                                  File dir)
                           throws IOException

Throws:

IOException

getIoFile

public static File getIoFile(File file)

listRoots

public static File[] listRoots()

castOrFail

public static IoFile castOrFail(File file)

moveRecursively

public static void moveRecursively(File fromDir,
                                   File toDir)
                            throws IOException

Directories will be created/deleted, files renamed. There is no rollback, if something happens during operation.

Throws:

IOException - If a directory itself could not be renamed, created or deleted.

SecurityException - Not catched. If this happens, some files will be moved, some not, but no data loss should have happened.

newFileNameForRenameTo

public static File newFileNameForRenameTo(File fromDir,
                                          File toDir,
                                          File current)
                                   throws IOException

Parameters:

fromDir - The from-dir of a move operation.

toDir - The destination dir of a move operation.

current - The current file, to compute the new name for. Must be inside of fromDir

Returns:

On moving from /a/fromDir/ to /a/toDir/, and current file is /a/fromDir/b/c, it will return /a/toDir/b/c

Throws:

IOException

checkRenameDir

protected static void checkRenameDir(File fromDir,
                                     File toDir)
                              throws IOException

Before starting a moveRecursively operation, which will make use of the File.renameTo method, it is useful to determine, whether this is possible or not. The reason: On a recursive rename, you will first move the inner content, and as last the root-directory.

Throws:

IOException