de.jstacs.io
Class FileManager

java.lang.Object
  de.jstacs.io.FileManager

public class FileManager
extends Object

This class is for handling Files. The most important methods of this class are for writing a StringBuffer to or reading it from a File. This is useful for all objects that implement Storable and should be saved in or loaded from a File.

Author:

Jens Keilwagen

See Also:

Storable, File

Method Summary

static void	copy(String from, String to) This method copies a File in a faster manner.
static void	copy(String from, String to, byte[] buffer) This method copies a File in a faster manner using a specified buffer.
static int	copyDiff(File source, File target, Date date, boolean recursive, FileFilter filter) This method copies all Files and directories, if selected, from a source File, i.e. directory, to a target File, i.e. directory, that have been modified after a predefined date.
static StringBuffer	readFile(File file) This method reads a StringBuffer from a given File.
static void	writeFile(File outputFile, StringBuffer buffer) This method saves a StringBuffer to a given File.

Methods inherited from class java.lang.Object

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

Method Detail

copyDiff

public static int copyDiff(File source,
                           File target,
                           Date date,
                           boolean recursive,
                           FileFilter filter)
                    throws IllegalArgumentException,
                           IOException

This method copies all Files and directories, if selected, from a source File, i.e. directory, to a target File, i.e. directory, that have been modified after a predefined date.

Parameters:

source - the source directory denoted as File

target - the target directory denoted as File

date - the Date

recursive - indicates if this method should be used recursively in the subdirectories

filter - a FileFilter for the Files that enables the user to copy only specific Files

Returns:

the number of copied Files

Throws:

IllegalArgumentException - if source and target are not directories

IOException - if something went wrong while copying the Files and directories

See Also:

File, Date, FileFilter

copy

public static void copy(String from,
                        String to)
                 throws IOException

This method copies a File in a faster manner.

Parameters:

from - the File name of the original file

to - the File name of the copied file

Throws:

IOException - if something went wrong

See Also:

copy(String, String, byte[])

copy

public static void copy(String from,
                        String to,
                        byte[] buffer)
                 throws IOException

This method copies a File in a faster manner using a specified buffer.

Parameters:

from - the File name of the original file

to - the File name of the copied file

buffer - an array for reading the content of the original File, the size of the array determines how many bytes are read at once

Throws:

IOException - if something went wrong

readFile

public static StringBuffer readFile(File file)
                             throws IOException

This method reads a StringBuffer from a given File.

Parameters:

file - the File to be read

Returns:

a StringBuffer with the content of the File

Throws:

IOException - if something went wrong with the File

See Also:

writeFile(File, StringBuffer)

writeFile

public static void writeFile(File outputFile,
                             StringBuffer buffer)
                      throws IOException

This method saves a StringBuffer to a given File.

Parameters:

outputFile - the File into which the output should be written

buffer - the buffer to be written in the File

Throws:

IOException - if something went wrong with the File

See Also:

readFile(File)