org.red5.classloading

Class ChildFirstClassLoader

java.lang.Object

java.lang.ClassLoader

java.security.SecureClassLoader

java.net.URLClassLoader

org.red5.classloading.ChildFirstClassLoader

All Implemented Interfaces:

Closeable, AutoCloseable

public final class ChildFirstClassLoader
extends URLClassLoader

An almost trivial no-fuss implementation of a class loader following the child-first delegation model. Based on code from Ceki Gulcu

Author:

Paul Gregoire (mondain@gmail.com)

Constructor Summary

Constructors

Constructor and Description
ChildFirstClassLoader(URL[] urls)
ChildFirstClassLoader(URL[] urls, ClassLoader parent)

Method Summary

Methods

Modifier and Type	Method and Description
URL	getResource(String name) Override the parent-first resource loading model established by java.lang.Classloader with child-first behavior.
Class<?>	loadClass(String name)
protected Class<?>	loadClass(String name, boolean resolve) We override the parent-first behavior established by java.lang.Classloader.

Methods inherited from class java.net.URLClassLoader

addURL, close, definePackage, findClass, findResource, findResources, getPermissions, getResourceAsStream, 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, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, registerAsParallelCapable, 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

ChildFirstClassLoader

public ChildFirstClassLoader(URL[] urls)

ChildFirstClassLoader

public ChildFirstClassLoader(URL[] urls,
                     ClassLoader parent)

Method Detail

loadClass

public Class<?> loadClass(String name)
                   throws ClassNotFoundException

Overrides:

loadClass in class ClassLoader

Throws:

ClassNotFoundException

loadClass

protected Class<?> loadClass(String name,
                 boolean resolve)
                      throws ClassNotFoundException

We override the parent-first behavior established by java.lang.Classloader.

The implementation is surprisingly straightforward.

Overrides:

loadClass in class ClassLoader

Parameters:

name - the name of the class to load, should not be null .

resolve - flag that indicates whether the class should be resolved.

Returns:

the loaded class, never null.

Throws:

ClassNotFoundException - if the class could not be loaded.

getResource

public URL getResource(String name)

Override the parent-first resource loading model established by java.lang.Classloader with child-first behavior.

Overrides:

getResource in class ClassLoader

Parameters:

name - the name of the resource to load, should not be null.

Returns:

a URL for the resource, or null if it could not be found.