org.bounce
Class JarClassLoader

java.lang.Object
  java.lang.ClassLoader
      java.security.SecureClassLoader
          org.bounce.JarClassLoader

public class JarClassLoader
extends java.security.SecureClassLoader

A class loader for loading resources and classes out of a jar file. Overrides the findClass and the findResource methods.

Version:

$Revision: 1.5 $, $Date: 2008/01/28 21:28:37 $

Author:

Edwin Dankert

Constructor Summary

JarClassLoader(java.lang.ClassLoader parent, java.net.URL url)
Creates a new JarClassLoader that will allow the loading of classes stored in the jar file supplied.

JarClassLoader(java.net.URL url)
Creates a new JarClassLoader that will allow the loading of classes stored in the jar file supplied.

Method Summary

java.lang.Class	findClass(java.lang.String name) Checks the contents table for an occurence of the class.
java.net.URL	findResource(java.lang.String name) Checks the contents table for an occurence of the resource file.

Methods inherited from class java.security.SecureClassLoader

defineClass, defineClass, getPermissions

Methods inherited from class java.lang.ClassLoader

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findLibrary, findLoadedClass, findResources, findSystemClass, getPackage, getPackages, getParent, getResource, getResourceAsStream, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, loadClass, loadClass, resolveClass, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners

Methods inherited from class java.lang.Object

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

Constructor Detail

JarClassLoader

public JarClassLoader(java.net.URL url)
               throws java.io.IOException

Creates a new JarClassLoader that will allow the loading of classes stored in the jar file supplied. It uses the system class loader as the parent classloader.

Parameters:

url - the URL of the jar file

Throws:

java.io.IOException - an error happened while reading the contents of the jar file.

JarClassLoader

public JarClassLoader(java.lang.ClassLoader parent,
                      java.net.URL url)
               throws java.io.IOException

Creates a new JarClassLoader that will allow the loading of classes stored in the jar file supplied.

Parameters:

parent - the parent classloader.

url - the URL of the jar file

Throws:

java.io.IOException - an error happened while reading the contents of the jar file.

Method Detail

findClass

public java.lang.Class findClass(java.lang.String name)
                          throws java.lang.ClassNotFoundException

Checks the contents table for an occurence of the class.

Overrides:

findClass in class java.lang.ClassLoader

Parameters:

name - the name of the class.

Returns:

the class found for the name.

Throws:

java.lang.ClassNotFoundException - the jar file did not contain the class.

findResource

public java.net.URL findResource(java.lang.String name)

Checks the contents table for an occurence of the resource file.

Overrides:

findResource in class java.lang.ClassLoader

Parameters:

name - the name of the resource.

Returns:

The url of the resource or null if not found.