org.ijsberg.iglu.util.io
Class FileSupport

java.lang.Object
  org.ijsberg.iglu.util.io.FileSupport

public abstract class FileSupport
extends Object

Supports retrieval and deletion of particular files in a directory structure as well as other file system manipulation.

Constructor Summary

FileSupport()

Method Summary

static String	convertToUnixStylePath(String path) Converts backslashes into forward slashes.
static void	copyClassLoadableResourceToFileSystem(String pathToResource, String outputPath)
static void	copyFile(String filename, String newFilename, boolean overwriteExisting) Copies a file.
static void	copyToFileSystem(InputStream input, String outputPath) Input stream is closed after reading.
static Map	countOccurencesInTextFile(File file, String searchString)
static File	createFile(String filename) Creates a file.
static File	createTmpDir()
static File	createTmpDir(String prefix)
static void	deleteContentsInDirectoryTree(File root, String mask) Deletes from a directory all files and subdirectories targeted by a given mask.
static void	deleteContentsInDirectoryTree(String path, String mask) Deletes from a directory all files and subdirectories targeted by a given mask.
static void	deleteFile(File file) Deletes a file or a directory including its contents;
static void	emptyDirectory(File file) Deletes all files and subdirectories from a directory.
static void	emptyDirectory(String path) Deletes all files and subdirectories from a directory.
static byte[]	getBinaryFromClassloader(String path)
static byte[]	getBinaryFromClassPath(String fileName, String classPath)
static byte[]	getBinaryFromFS(File existingFile)
static byte[]	getBinaryFromFS(String fileName)
static byte[]	getBinaryFromJar(String fileName, String jarFileName) Tries to retrieve a file as ZipEntry from all jars mentioned in system property java.class.path
static File	getClassFileFromDirectoryInClassPath(String className) Tries to retrieve a class as File from all directories mentioned in system property java.class.path
static ZipEntry	getClassZipEntryFromJarInClassPath(String className) Tries to retrieve a class as ZipEntry from all jars mentioned in system property java.class.path
static ArrayList	getDirectoriesInDirectoryTree(String path) Retrieves all directories from a directory and its subdirectories.
static ArrayList	getDirectoriesInDirectoryTree(String path, String mask) Retrieves all directories from a directory and its subdirectories.
static File	getFileFromDirectoryInClassPath(String fileName, String classPath) Locates a file in the classpath.
static String	getFileNameFromPath(String path)
static ArrayList	getFilesInDirectoryTree(File directory) Retrieves all files from a directory and its subdirectories.
static ArrayList	getFilesInDirectoryTree(File file, String mask) Retrieves all files from a directory and its subdirectories matching the given mask.
static ArrayList	getFilesInDirectoryTree(String path) Retrieves all files from a directory and its subdirectories.
static ArrayList	getFilesInDirectoryTree(String path, String mask) Retrieves files for a given mask from a directory and its subdirectories.
static ArrayList	getFilesInDirectoryTree(String path, String mask, boolean returnDirs) Retrieves all files from a directory and its subdirectories.
static InputStream	getInputStreamFromClassLoader(String path)
static OutputStream	getOutputStreamToFileSystem(String path)
static ZipEntry	getZipEntryFromJar(String fileName, String jarFileName)
static void	main(String[] args) Commandline use of FileSupport only supports recursive investigation of directories.

Methods inherited from class java.lang.Object

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

Constructor Detail

FileSupport

public FileSupport()

Method Detail

getFilesInDirectoryTree

public static ArrayList getFilesInDirectoryTree(String path)

Retrieves all files from a directory and its subdirectories.

Parameters:

path - path to directory

Returns:

A list containing the found files

getFilesInDirectoryTree

public static ArrayList getFilesInDirectoryTree(File directory)

Retrieves all files from a directory and its subdirectories.

Parameters:

directory - directory

Returns:

a list containing the found files

getFilesInDirectoryTree

public static ArrayList getFilesInDirectoryTree(String path,
                                                String mask)

Retrieves files for a given mask from a directory and its subdirectories.

Parameters:

path - root of directory tree

mask - exact filename, or mask containing wildcards

Returns:

A list containing the found files

getFilesInDirectoryTree

public static ArrayList getFilesInDirectoryTree(File file,
                                                String mask)

Retrieves all files from a directory and its subdirectories matching the given mask.

Parameters:

file - directory

mask - mask to match

Returns:

a list containing the found files

getDirectoriesInDirectoryTree

public static ArrayList getDirectoriesInDirectoryTree(String path)

Retrieves all directories from a directory and its subdirectories.

Parameters:

path - path to directory

Returns:

A list containing the found directories

getDirectoriesInDirectoryTree

public static ArrayList getDirectoriesInDirectoryTree(String path,
                                                      String mask)

Retrieves all directories from a directory and its subdirectories.

Parameters:

path - path to directory

mask - file name to match

Returns:

A list containing the found directories

getFilesInDirectoryTree

public static ArrayList getFilesInDirectoryTree(String path,
                                                String mask,
                                                boolean returnDirs)

Retrieves all files from a directory and its subdirectories.

Parameters:

path - path to directory

mask - file name to match

returnDirs - indicates if directories must be returned as well

Returns:

a list containing the found files

getClassFileFromDirectoryInClassPath

public static File getClassFileFromDirectoryInClassPath(String className)

Tries to retrieve a class as File from all directories mentioned in system property java.class.path

Parameters:

className - class name as retrieved in myObject.getClass().getName()

Returns:

a File if the class file was found or null otherwise

getFileFromDirectoryInClassPath

public static File getFileFromDirectoryInClassPath(String fileName,
                                                   String classPath)

Locates a file in the classpath.

Parameters:

fileName -

classPath -

Returns:

the found file or null if the file can not be located

getBinaryFromFS

public static byte[] getBinaryFromFS(String fileName)
                              throws IOException

Parameters:

fileName -

Returns:

Throws:

IOException

getBinaryFromFS

public static byte[] getBinaryFromFS(File existingFile)
                              throws IOException

Returns:

Throws:

IOException

getClassZipEntryFromJarInClassPath

public static ZipEntry getClassZipEntryFromJarInClassPath(String className)
                                                   throws IOException

Tries to retrieve a class as ZipEntry from all jars mentioned in system property java.class.path

Parameters:

className - class name as retrieved in myObject.getClass().getName()

Returns:

a ZipEntry if the class file was found or null otherwise

Throws:

IOException

getBinaryFromJar

public static byte[] getBinaryFromJar(String fileName,
                                      String jarFileName)
                               throws IOException

Tries to retrieve a file as ZipEntry from all jars mentioned in system property java.class.path

Parameters:

fileName - class name as retrieved in myObject.getClass().getName()

Returns:

a ZipEntry if the class file was found or null otherwise

Throws:

IOException

getBinaryFromClassPath

public static byte[] getBinaryFromClassPath(String fileName,
                                            String classPath)
                                     throws IOException

Throws:

IOException

getBinaryFromClassloader

public static byte[] getBinaryFromClassloader(String path)
                                       throws IOException

Throws:

IOException

getInputStreamFromClassLoader

public static InputStream getInputStreamFromClassLoader(String path)
                                                 throws IOException

Throws:

IOException

getOutputStreamToFileSystem

public static OutputStream getOutputStreamToFileSystem(String path)
                                                throws IOException

Throws:

IOException

copyClassLoadableResourceToFileSystem

public static void copyClassLoadableResourceToFileSystem(String pathToResource,
                                                         String outputPath)
                                                  throws IOException

Throws:

IOException

copyToFileSystem

public static void copyToFileSystem(InputStream input,
                                    String outputPath)
                             throws IOException

Input stream is closed after reading.

Parameters:

input -

outputPath -

Throws:

IOException

getZipEntryFromJar

public static ZipEntry getZipEntryFromJar(String fileName,
                                          String jarFileName)
                                   throws IOException

Throws:

IOException

createFile

public static File createFile(String filename)
                       throws IOException

Creates a file. The file, and the directory structure is created physically, if it does not exist already.

Parameters:

filename -

Returns:

Throws:

IOException

emptyDirectory

public static void emptyDirectory(String path)

Deletes all files and subdirectories from a directory.

Parameters:

path -

emptyDirectory

public static void emptyDirectory(File file)

Deletes all files and subdirectories from a directory.

Parameters:

file -

deleteFile

public static void deleteFile(File file)

Deletes a file or a directory including its contents;

Parameters:

file -

copyFile

public static void copyFile(String filename,
                            String newFilename,
                            boolean overwriteExisting)
                     throws IOException

Copies a file.

Parameters:

filename -

newFilename -

overwriteExisting -

Throws:

IOException

deleteContentsInDirectoryTree

public static void deleteContentsInDirectoryTree(String path,
                                                 String mask)

Deletes from a directory all files and subdirectories targeted by a given mask. The method will recurse into subdirectories.

Parameters:

path -

mask -

deleteContentsInDirectoryTree

public static void deleteContentsInDirectoryTree(File root,
                                                 String mask)

Deletes from a directory all files and subdirectories targeted by a given mask. The method will recurse into subdirectories.

Parameters:

root -

mask -

countOccurencesInTextFile

public static Map countOccurencesInTextFile(File file,
                                            String searchString)
                                     throws IOException

Parameters:

file -

searchString -

Returns:

a map containing the number of occurrences of the search string in lines, if 1 or more, keyed and sorted by line number

Throws:

IOException - if the file could not be found or is a directory or locked

main

public static void main(String[] args)

Commandline use of FileSupport only supports recursive investigation of directories. Usage: java FileSupport - [] []

Parameters:

args -

convertToUnixStylePath

public static String convertToUnixStylePath(String path)

Converts backslashes into forward slashes.

Parameters:

path -

Returns:

getFileNameFromPath

public static String getFileNameFromPath(String path)

createTmpDir

public static File createTmpDir()
                         throws IOException

Throws:

IOException

createTmpDir

public static File createTmpDir(String prefix)
                         throws IOException

Throws:

IOException