gov.nih.nci.cagrid.common
Class JarUtilities

java.lang.Object
  gov.nih.nci.cagrid.common.JarUtilities

public class JarUtilities
extends java.lang.Object

JarUtilities Utilities to manipulate jar files

Version:

$Id$

Author:

David W. Ervin

Constructor Summary

JarUtilities()

Method Summary

static java.lang.StringBuffer	getFileContents(java.util.jar.JarFile jar, java.lang.String entryName) Gets the contents of a jar entry as a StringBuffer
static void	insertEntry(java.io.File jarFile, java.lang.String entryName, byte[] data) Inserts an entry in a Jar file.
static void	jarDirectory(java.io.File dir, java.io.File jarFile) Places the contents of a directory in a Jar file
static byte[]	removeJarEntry(java.util.jar.JarFile jar, java.lang.String entryName) Removes an entry from a jar file

Methods inherited from class java.lang.Object

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

Constructor Detail

JarUtilities

public JarUtilities()

Method Detail

getFileContents

public static java.lang.StringBuffer getFileContents(java.util.jar.JarFile jar,
                                                     java.lang.String entryName)
                                              throws java.io.IOException

Gets the contents of a jar entry as a StringBuffer

Parameters:

jar - The jar to extract from

entryName - The name of the entry to be extracted

Returns:

The contents of a jar entry, or null if no such entry exists

Throws:

java.io.IOException

removeJarEntry

public static byte[] removeJarEntry(java.util.jar.JarFile jar,
                                    java.lang.String entryName)
                             throws java.io.IOException

Removes an entry from a jar file

Parameters:

jar - The jar file

entryName - The name of the entry to remove

Returns:

The data of the jar with the entry removed

Throws:

java.io.IOException

jarDirectory

public static void jarDirectory(java.io.File dir,
                                java.io.File jarFile)
                         throws java.io.IOException

Places the contents of a directory in a Jar file

Parameters:

dir - The directory

jarFile - The jar file

Throws:

java.io.IOException

insertEntry

public static void insertEntry(java.io.File jarFile,
                               java.lang.String entryName,
                               byte[] data)
                        throws java.io.IOException

Inserts an entry in a Jar file. If an entry with the given name is found, it will be replaced with the new one.

Parameters:

jarFile - The jar file to be appended

entryName - The name of the new entry

data - The data to add to the zip

Throws:

java.io.IOException