org.jasig.portal.car
Class CarClassLoader

java.lang.Object
  java.lang.ClassLoader
      java.security.SecureClassLoader
          org.jasig.portal.car.CarClassLoader

public class CarClassLoader
extends SecureClassLoader

Loads classes and resources from installed CARs via the CarResources class. If classes are visible via the parent class loader then they will be used in place of those in the CARs. This is a singleton so that we have a single unified class namespace for all car resources preventing linkage errors and class cast exceptions.

Version:

$Revision: 19776 $

Author:

Mark Boyd mark.boyd@engineer.com

Field Summary

static String

RCS_ID

Method Summary

Class	findClass(String name) Implement the overloading of findClass to return classes that are available from installed CAR files.
URL	findResource(String res) Returns a URL pointing to a car resource if a suitable resource is found in the loaded set of CAR files or null if one is not found.

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

Field Detail

RCS_ID

public static final String RCS_ID

See Also:

Constant Field Values

Method Detail

findClass

public Class findClass(String name)
                throws ClassNotFoundException

Implement the overloading of findClass to return classes that are available from installed CAR files. Class loading precedes with the parent classloader first which delegates to this class loader if the classes aren't found.

Overrides:

findClass in class ClassLoader

Throws:

ClassNotFoundException

findResource

public URL findResource(String res)

Returns a URL pointing to a car resource if a suitable resource is found in the loaded set of CAR files or null if one is not found.

Overrides:

findResource in class ClassLoader