org.ow2.proactive.utils

Class ChildFirstClassLoader

java.lang.Object

java.lang.ClassLoader

java.security.SecureClassLoader

java.net.URLClassLoader

org.ow2.proactive.utils.ChildFirstClassLoader

All Implemented Interfaces:

Closeable, AutoCloseable

public class ChildFirstClassLoader
extends URLClassLoader

ChildFirstClassLoader provides a child-first delegation mechanims for class loading. That is, it first trys to load the class from the specified jars, then delegates to the parent class loader. This child-first class loader allows the different addons use their specific version of dependent library. Note, the class loader should be used both as the class loader and as the thread context class loader.

Since:

28/11/19

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
URL	getResource(String name)
Enumeration<URL>	getResources(String name)
protected Class<?>	loadClass(String name, boolean resolve)

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, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, 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

Constructor Detail

ChildFirstClassLoader

public ChildFirstClassLoader(URL[] urls,
                             ClassLoader parent)

Method Detail

loadClass

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

Overrides:

loadClass in class ClassLoader

Throws:

ClassNotFoundException

getResources

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

Overrides:

getResources in class ClassLoader

Throws:

IOException

getResource

public URL getResource(String name)

Overrides:

getResource in class ClassLoader