Package org.keycloak.utils

Class ProxyClassLoader

java.lang.Object

java.lang.ClassLoader

org.keycloak.utils.ProxyClassLoader

public class ProxyClassLoader
extends ClassLoader

Author:

Erik Mulder Classloader implementation to facilitate loading classes and resources from a collection of other classloaders. Effectively it forms a proxy to one or more other classloaders. The way it works: - Get list of classloaders, which will be used as "delegates" when loaded classes or resources. - Can be retrieved from provided classloaders or alternatively from the provided classes where the "delegate classloaders" will be determined from the classloaders of given classes - For each class or resource that is 'requested': - First try all provided classloaders and if we have a match, return that - If no match was found: proceed with 'normal' classloading in 'current classpath' scope In this particular context: only loadClass and getResource overrides are needed, since those are the methods that a classloading and resource loading process will need.

Constructor Summary

Constructors

Constructor	Description
ProxyClassLoader(ClassLoader... delegateClassLoaders)	Init classloader with the list of given delegates
ProxyClassLoader(Collection<Class<?>> classes)	Get all unique classloaders from the provided classes to be used as "Delegate classloaders"

Method Summary

Modifier and Type	Method	Description
URL	getResource(String name)
Enumeration<URL>	getResources(String name)
Class<?>	loadClass(String name)
String	toString()

Methods inherited from class java.lang.ClassLoader

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findClass, findClass, findLibrary, findLoadedClass, findResource, findResource, findResources, findSystemClass, getClassLoadingLock, getDefinedPackage, getDefinedPackages, getName, getPackage, getPackages, getParent, getPlatformClassLoader, getResourceAsStream, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, getUnnamedModule, isRegisteredAsParallelCapable, loadClass, registerAsParallelCapable, resolveClass, resources, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners

Methods inherited from class java.lang.Object

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

Constructor Details

ProxyClassLoader

public ProxyClassLoader(ClassLoader... delegateClassLoaders)

Init classloader with the list of given delegates

Parameters:

delegateClassLoaders -

ProxyClassLoader

public ProxyClassLoader(Collection<Class<?>> classes)

Get all unique classloaders from the provided classes to be used as "Delegate classloaders"

Parameters:

classes -

Method Details

loadClass

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

Overrides:

loadClass in class ClassLoader

Throws:

ClassNotFoundException

getResource

public URL getResource(String name)

Overrides:

getResource in class ClassLoader

getResources

public Enumeration<URL> getResources(String name)
                              throws IOException

Overrides:

getResources in class ClassLoader

Throws:

IOException

toString

public String toString()

Overrides:

toString in class Object