org.apache.cocoon.maven.deployer.servlet
Class ShieldedClassLoader

java.lang.Object
  java.lang.ClassLoader
      java.security.SecureClassLoader
          java.net.URLClassLoader
              org.apache.cocoon.maven.deployer.servlet.ShieldedClassLoader

public class ShieldedClassLoader
extends URLClassLoader

This class loader reverses the search order for classes. It checks this classloader before it checks its parent.

Version:

$Id: ShieldedClassLoader.html 1351235 2012-06-18 08:41:39Z ilgrosso $

Constructor Summary

ShieldedClassLoader(URL[] urls, ClassLoader parent)
Alternate constructor to define a parent and initial URLs.

ShieldedClassLoader(URL[] urls, ClassLoader parent, URLStreamHandlerFactory factory)
Alternate constructor to define a parent, initial URLs, and a default URLStreamHandlerFactory.

Method Summary

protected Class	getClass(String name)
URL	getResource(String name) Gets a resource from this ClassLoader.
Class	loadClass(String name, boolean resolve) Loads the class from this ClassLoader.
protected boolean	tryClassHere(String name)

Methods inherited from class java.net.URLClassLoader

addURL, definePackage, findClass, findResource, 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, getPackage, getPackages, getParent, getResourceAsStream, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, 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

ShieldedClassLoader

public ShieldedClassLoader(URL[] urls,
                           ClassLoader parent)

Alternate constructor to define a parent and initial URLs.

ShieldedClassLoader

public ShieldedClassLoader(URL[] urls,
                           ClassLoader parent,
                           URLStreamHandlerFactory factory)

Alternate constructor to define a parent, initial URLs, and a default URLStreamHandlerFactory.

Method Detail

tryClassHere

protected boolean tryClassHere(String name)

getClass

protected Class getClass(String name)
                  throws ClassNotFoundException

Throws:

ClassNotFoundException

loadClass

public final Class loadClass(String name,
                             boolean resolve)
                      throws ClassNotFoundException

Loads the class from this ClassLoader. If the class does not exist in this one, we check the parent. Please note that this is the exact opposite of the ClassLoader spec. We use it to work around inconsistent class loaders from third party vendors.

Overrides:

loadClass in class ClassLoader

Parameters:

name - the name of the class

resolve - if true then resolve the class

Returns:

the resulting Class object

Throws:

ClassNotFoundException - if the class could not be found

getResource

public final URL getResource(String name)

Gets a resource from this ClassLoader. If the resource does not exist in this one, we check the parent. Please note that this is the exact opposite of the ClassLoader spec. We use it to work around inconsistent class loaders from third party vendors.

Overrides:

getResource in class ClassLoader

Parameters:

name - of resource