calypso.util
Class URLClassLoader

java.lang.Object
  |
  +--java.lang.ClassLoader
        |
        +--calypso.util.URLClassLoader

public class URLClassLoader

extends java.lang.ClassLoader

A URL based class loader. This class knows how to load classes from a given base URL

Constructor Summary

URLClassLoader(java.net.URL aBaseURL, java.net.URL aArchiveURL)
Create a new URL based class loader.

Method Summary

protected void	finalize()
protected java.lang.Class	findClass(java.lang.String name) This method finds a class.
java.net.URL	getCodeBaseURL()
java.lang.Class	loadClass(java.lang.String name) Load a class from this class loader.
protected java.lang.Class	loadClass(java.lang.String name, boolean resolve) Load and resolve a class.

Methods inherited from class java.lang.ClassLoader

defineClass, defineClass, defineClass, definePackage, findLibrary, findLoadedClass, findResource, findResources, findSystemClass, getPackage, getPackages, getParent, getResource, getResourceAsStream, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, resolveClass, setSigners

Methods inherited from class java.lang.Object

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

Constructor Detail

URLClassLoader

public URLClassLoader(java.net.URL aBaseURL,
                      java.net.URL aArchiveURL)

Create a new URL based class loader. aBaseURL specifies the URL to load classes relative to. If aArchiveURL is not null then the archive will be searched first (if it fails then the load will be attempted from aBaseURL).

Method Detail

loadClass

public java.lang.Class loadClass(java.lang.String name)
                          throws java.lang.ClassNotFoundException

Load a class from this class loader. This method is used by applets that want to explicitly load a class.

Overrides:

loadClass in class java.lang.ClassLoader

loadClass

protected java.lang.Class loadClass(java.lang.String name,
                                    boolean resolve)
                             throws java.lang.ClassNotFoundException

Load and resolve a class. This method is called by the java runtime to get a class that another class needs (e.g. a superclass).

Overrides:

loadClass in class java.lang.ClassLoader

findClass

protected java.lang.Class findClass(java.lang.String name)
                             throws java.lang.ClassNotFoundException

This method finds a class. The returned class may be unresolved. This method has to be synchronized to avoid two threads loading the same class at the same time. Must be called with the actual class name.

Overrides:

findClass in class java.lang.ClassLoader

getCodeBaseURL

public java.net.URL getCodeBaseURL()

finalize

protected void finalize()

Overrides:

finalize in class java.lang.Object