org.apache.spark.util

Class ChildFirstURLClassLoader

Object

ClassLoader

java.security.SecureClassLoader

java.net.URLClassLoader

org.apache.spark.util.MutableURLClassLoader

org.apache.spark.util.ChildFirstURLClassLoader

All Implemented Interfaces:

java.io.Closeable, AutoCloseable

public class ChildFirstURLClassLoader
extends MutableURLClassLoader

A mutable class loader that gives preference to its own URLs over the parent class loader when loading classes and resources.

Constructor Summary

Constructors

Constructor and Description
ChildFirstURLClassLoader(java.net.URL[] urls, ClassLoader parent)
ChildFirstURLClassLoader(java.net.URL[] urls, ClassLoader parent, ClassLoader grandparent) Specify the grandparent if there is a need to load in the order of `grandparent -> urls (child) -> parent`.

Method Summary

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

Methods inherited from class org.apache.spark.util.MutableURLClassLoader

addURL

Methods inherited from class java.net.URLClassLoader

close, findResource, findResources, getResourceAsStream, getURLs, newInstance, newInstance

Methods inherited from class ClassLoader

clearAssertionStatus, getParent, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, loadClass, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus

Methods inherited from class Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ChildFirstURLClassLoader

public ChildFirstURLClassLoader(java.net.URL[] urls,
                                ClassLoader parent)

ChildFirstURLClassLoader

public ChildFirstURLClassLoader(java.net.URL[] urls,
                                ClassLoader parent,
                                ClassLoader grandparent)

Specify the grandparent if there is a need to load in the order of `grandparent -> urls (child) -> parent`.

Method Detail

loadClass

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

Overrides:

loadClass in class ClassLoader

Throws:

ClassNotFoundException

getResources

public java.util.Enumeration<java.net.URL> getResources(String name)
                                                 throws java.io.IOException

Overrides:

getResources in class ClassLoader

Throws:

java.io.IOException

getResource

public java.net.URL getResource(String name)

Overrides:

getResource in class ClassLoader