it.eng.test
Class JarResources

java.lang.Object
  extended byit.eng.test.JarResources

public final class JarResources
extends java.lang.Object

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


Field Summary
 boolean debugOn
           
 
Constructor Summary
JarResources(java.lang.String jarFileName)
          creates a JarResources.
 
Method Summary
 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.

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")
                   );
     ...
 

Throws:
java.io.IOException