com.izforge.izpack.util
Class FileUtil

java.lang.Object
  com.izforge.izpack.util.FileUtil

public class FileUtil
extends Object

Provides general global file utility methods

Author:

marc.eppelmann

Constructor Summary

FileUtil()

Method Summary

static File	convertUrlToFile(URL url)
static String	convertUrlToFilePath(URL url)
static File	getAbsoluteFile(String filename, String basedir) Gets an absolute file from a filename.
static List<String>	getFileContent(String fileName) Gets the content from a File as StringArray List.
static long	getFileDateTime(URL url) Gets file date and time.
static String[]	getFileNames(String dirPath, FilenameFilter fileNameFilter)
static File	getLockFile(String applicationName)
static String	getRelativeFileName(File file, File basedir) Gets a relative file from a filename against a base directory.

Methods inherited from class java.lang.Object

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

Constructor Detail

FileUtil

public FileUtil()

Method Detail

convertUrlToFile

public static File convertUrlToFile(URL url)

convertUrlToFilePath

public static String convertUrlToFilePath(URL url)

getLockFile

public static File getLockFile(String applicationName)

getFileContent

public static List<String> getFileContent(String fileName)
                                   throws IOException

Gets the content from a File as StringArray List.

Parameters:

fileName - A file to read from.

Returns:

List of individual line of the specified file. List may be empty but not null.

Throws:

IOException

getFileDateTime

public static long getFileDateTime(URL url)

Gets file date and time.

Parameters:

url - The URL of the file for which date and time will be returned.

Returns:

Returns long value which is the date and time of the file. If any error occurs returns -1 (=no file date and time available).

getFileNames

public static String[] getFileNames(String dirPath,
                                    FilenameFilter fileNameFilter)

getAbsoluteFile

public static File getAbsoluteFile(String filename,
                                   String basedir)

Gets an absolute file from a filename. In difference to File.isAbsolute() this method bases relative file names on a given base directory.

Parameters:

filename - The filename to build an absolute file from

basedir - The base directory for a relative filename

Returns:

The absolute file according to the described algorithm

getRelativeFileName

public static String getRelativeFileName(File file,
                                         File basedir)
                                  throws IOException

Gets a relative file from a filename against a base directory. Enclosed '.' and '..' characters are resolved for all parameters.

Parameters:

file - The filename to build a relative file from

basedir - The base directory for a relative filename

Returns:

The relative file name, or null, if one input parameter was null

Throws:

IOException - if the file paths cannot be canonicalized