com.portal.pfc.util.nestedjars

Class NestedJarClassLoader

java.lang.Object

java.lang.ClassLoader

java.security.SecureClassLoader

java.net.URLClassLoader

com.portal.pfc.util.nestedjars.NestedJarClassLoader

All Implemented Interfaces:

Closeable, AutoCloseable

public class NestedJarClassLoader
extends URLClassLoader

NestedJarClassLoader affords the ability to load classes and resources from jar files nested in other jar files.

Author:

Max Spivak

Method Summary

Modifier and Type	Method and Description
protected Class	findClass(String name)
URL	findResource(String name) The URL returned is of the form
static ClassLoader	getNestedJarClassLoader(ClassLoader extcl) Get a newly-created NestedJarClassLoader.
InputStream	getResourceAsStream(String name)
static boolean	isRunningUnderWebStart() Returns whether the application center is running in WebStart

Methods inherited from class java.net.URLClassLoader

addURL, close, definePackage, findResources, getPermissions, getURLs, newInstance, newInstance

Methods inherited from class java.security.SecureClassLoader

defineClass, defineClass

Methods inherited from class java.lang.ClassLoader

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

Methods inherited from class java.lang.Object

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

Method Detail

getNestedJarClassLoader

public static ClassLoader getNestedJarClassLoader(ClassLoader extcl)
                                           throws IOException

Get a newly-created NestedJarClassLoader.

Parameters:

extcl - Classloader to use as the parent classloader.

Throws:

IOException

isRunningUnderWebStart

public static boolean isRunningUnderWebStart()

Returns whether the application center is running in WebStart

Returns:

true if we're running in Web Start; otherwise false

findClass

protected Class findClass(String name)
                   throws ClassNotFoundException

Overrides:

findClass in class URLClassLoader

Throws:

ClassNotFoundException

findResource

public URL findResource(String name)

The URL returned is of the form

nestedjar://file:/C:/path/to/jarfile/pjfsamplesmain.jar!/pjfsamples.jar!/com/portal/app/testapp/images/SendMail16.gif

. NestedJarURLConnection knows how to handle these URLs.

Overrides:

findResource in class URLClassLoader

getResourceAsStream

public InputStream getResourceAsStream(String name)

Overrides:

getResourceAsStream in class URLClassLoader