org.jgap.util

Class JarResources

java.lang.Object

org.jgap.util.JarResources

public final class JarResources
extends java.lang.Object

JarResources maps all resources included in a zip or jar file. Additionaly, it provides a method to extract one as a blob.

Since:

3.2

Field Summary

Fields

Modifier and Type	Field and Description
boolean	debugOn

Constructor Summary

Constructors

Constructor and Description
JarResources(java.lang.String jarFileName) creates a JarResources.

Method Summary

Modifier and Type	Method and Description
byte[]	getResource(java.lang.String name) Extracts a jar resource as a blob.
static void	main(java.lang.String[] args) Is a test driver.

Methods inherited from class java.lang.Object

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

Field Detail

debugOn

public boolean debugOn

Constructor Detail

JarResources

public JarResources(java.lang.String jarFileName)

creates a JarResources. It extracts all resources from a Jar into an internal hashtable, keyed by resource names.

Parameters:

jarFileName - a jar or zip file

Method Detail

getResource

public byte[] getResource(java.lang.String name)

Extracts a jar resource as a blob.

Parameters:

name - a resource name

Returns:

extracted blob

main

public static void main(java.lang.String[] args)
                 throws java.io.IOException

Is a test driver. Given a jar file and a resource name, it trys to extract the resource and then tells us whether it could or not. Example Let's say you have a JAR file which jarred up a bunch of gif image files. Now, by using JarResources, you could extract, create, and display those images on-the-fly.

     ...
     JarResources JR=new JarResources("GifBundle.jar");
     Image image=Toolkit.createImage(JR.getResource("logo.gif");
     Image logo=Toolkit.getDefaultToolkit().createImage(
                   JR.getResources("logo.gif")
                   );
     ...
 

Parameters:

args - arguments

Throws:

java.io.IOException