Package net.sourceforge.jnlp.util

Class MD5SumWatcher

java.lang.Object

net.sourceforge.jnlp.util.MD5SumWatcher

public class MD5SumWatcher
extends java.lang.Object

Constructor Summary

Constructors

Constructor	Description
MD5SumWatcher(java.io.File watchedFile)	Create a new MD5SumWatcher instance

Method Summary

Modifier and Type	Method	Description
byte[]	getSum()	Get the current MD5 sum of the watched file
boolean	update()	Detect if the file's MD5 has changed and track its new sum if so

Methods inherited from class java.lang.Object

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

Constructor Detail

MD5SumWatcher

public MD5SumWatcher(java.io.File watchedFile)

Create a new MD5SumWatcher instance

Parameters:

watchedFile - the file to watch

Method Detail

getSum

public byte[] getSum()
              throws java.io.FileNotFoundException,
                     java.io.IOException

Get the current MD5 sum of the watched file

Returns:

a byte array of the MD5 sum

Throws:

java.io.FileNotFoundException - if the watched file does not exist

java.io.IOException - if the file cannot be read

update

public boolean update()
               throws java.io.FileNotFoundException,
                      java.io.IOException

Detect if the file's MD5 has changed and track its new sum if so

Returns:

if the file's MD5 has changed since the last update

Throws:

java.io.FileNotFoundException - if the watched file does not exist

java.io.IOException - if the file cannot be read