org.apache.log4j.helpers

Class Loader

java.lang.Object

org.apache.log4j.helpers.Loader

public class Loader
extends Object

Load resources (or images) from various sources.

Author:

Ceki Gülcü

Constructor Summary

Constructors

Constructor and Description
Loader()

Method Summary

Modifier and Type	Method and Description
static URL	getResource(String resource) This method will search for resource in different places.
static URL	getResource(String resource, Class clazz) Deprecated. as of 1.2.
static boolean	isJava1() Are we running under JDK 1.x?
static Class	loadClass(String clazz) If running under JDK 1.2 load the specified class using the Thread contextClassLoader if that fails try Class.forname.

Methods inherited from class java.lang.Object

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

Constructor Detail

Loader

public Loader()

Method Detail

getResource

public static URL getResource(String resource,
                              Class clazz)

Deprecated. as of 1.2.

Get a resource by delegating to getResource(String).

Parameters:

resource - resource name

clazz - class, ignored.

Returns:

URL to resource or null.

getResource

public static URL getResource(String resource)

This method will search for resource in different places. The search order is as follows:

1. Search for resource using the thread context class loader under Java2. If that fails, search for resource using the class loader that loaded this class (Loader). Under JDK 1.1, only the the class loader that loaded this class (Loader) is used.

2. in pax-logging, Bundle.getResource(String) is then checked
3. Try one last time with ClassLoader.getSystemResource(resource), that is is using the system class loader in JDK 1.2 and virtual machine's built-in class loader in JDK 1.1.

isJava1

public static boolean isJava1()

Are we running under JDK 1.x?

loadClass

public static Class loadClass(String clazz)
                       throws ClassNotFoundException

If running under JDK 1.2 load the specified class using the Thread contextClassLoader if that fails try Class.forname. Under JDK 1.1 only Class.forName is used. In pax-logging, TCCL is always checked first, then Bundle.loadClass(String) eventually Class.forName(String) is called.

Throws:

ClassNotFoundException