Package org.apache.commons.jelly.util

Class ClassLoaderUtils

java.lang.Object

org.apache.commons.jelly.util.ClassLoaderUtils

public class ClassLoaderUtils
extends Object

A class to centralize the class loader management code.

Constructor Summary

Constructors

Constructor	Description
ClassLoaderUtils()

Method Summary

Modifier and Type	Method	Description
static ClassLoader	getClassLoader(Class clazz)	Get the loader for the given class.
static ClassLoader	getClassLoader(ClassLoader specifiedLoader, boolean useContextClassLoader, Class callingClass)	Return the class loader to be used for instantiating application objects when required.
static ClassLoader	getClassLoader(ClassLoader specifiedLoader, Class callingClass)	Return the class loader to be used for instantiating application objects when a context class loader is not specified.
static Class	loadClass(String className, Class callingClass)	Loads the given class using the current Thread's context class loader first otherwise use the class loader which loaded this class.
static Class	loadClass(String className, ClassLoader specifiedLoader, boolean useContextLoader, Class callingClass)	Loads the given class using: the specified classloader, the current Thread's context class loader first, if asked otherwise use the class loader which loaded this class.

Methods inherited from class java.lang.Object

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

Constructor Detail

ClassLoaderUtils

public ClassLoaderUtils()

Method Detail

getClassLoader

public static ClassLoader getClassLoader(ClassLoader specifiedLoader,
                                         boolean useContextClassLoader,
                                         Class callingClass)

Return the class loader to be used for instantiating application objects when required. This is determined based upon the following rules:

• The specified class loader, if any
• The thread context class loader, if it exists and useContextClassLoader is true
• The class loader used to load the calling class.
• The System class loader.

getClassLoader

public static ClassLoader getClassLoader(ClassLoader specifiedLoader,
                                         Class callingClass)

Return the class loader to be used for instantiating application objects when a context class loader is not specified. This is determined based upon the following rules:

• The specified class loader, if any
• The class loader used to load the calling class.
• The System class loader.

getClassLoader

public static ClassLoader getClassLoader(Class clazz)

Get the loader for the given class.

Parameters:

clazz - the class to retrieve the loader for

Returns:

the class loader that loaded the provided class

loadClass

public static Class loadClass(String className,
                              Class callingClass)
                       throws ClassNotFoundException

Loads the given class using the current Thread's context class loader first otherwise use the class loader which loaded this class.

Throws:

ClassNotFoundException

loadClass

public static Class loadClass(String className,
                              ClassLoader specifiedLoader,
                              boolean useContextLoader,
                              Class callingClass)
                       throws ClassNotFoundException

Loads the given class using:

1. the specified classloader,
2. the current Thread's context class loader first, if asked
3. otherwise use the class loader which loaded this class.

Throws:

ClassNotFoundException