org.sadun.util
Class DynamicClassLoader

java.lang.Object
  java.lang.ClassLoader
      org.sadun.util.DynamicClassLoader

public class DynamicClassLoader

extends java.lang.ClassLoader

A classloader whose classpath can be set dynamically.

Version 1.2 adds resource support capability, but for the findResources() which is not implemented.

By default, the classLoader attempts to use the parent class loader, if any, to find a class. By setting the forceDynamicLoading property, the classLoader will always find classes by using the embedded DynamicClassFileFinder. $Revision$

Version:

1.3

Author:

cris

Constructor Summary

DynamicClassLoader()
Constructor for DynamicClassLoader.

DynamicClassLoader(java.lang.ClassLoader arg0)

DynamicClassLoader(java.lang.ClassLoader arg0, DynamicClassFileFinder cff, DynamicResourceFileFinder rff)
Constructor for DynamicClassLoader.

DynamicClassLoader(DynamicClassFileFinder cff, DynamicResourceFileFinder rff)
Constructor for DynamicClassLoader.

Method Summary

void	addClassPathEntry(java.lang.String entry) Add a class path entry
protected java.lang.Class	findClass(java.lang.String arg0)
protected java.lang.String	findLibrary(java.lang.String libname) Looks for a library in classpath and load it if found.
protected java.net.URL	findResource(java.lang.String name)
protected java.util.Enumeration	findResources(java.lang.String name)
DynamicClassFileFinder	getClassFileFinder()
java.lang.String	getClassPath() Returnt the current class path
java.io.InputStream	getResourceAsStream(java.lang.String name)
DynamicResourceFileFinder	getResourceFileFinder()
boolean	isForceDynamicLoading() Returns the forceDynamicLoading.
protected java.lang.Class	loadClass(java.lang.String name, boolean resolve)
static void	main(java.lang.String[] args)
void	setClassPath(java.lang.String classPath) Set the class path
void	setForceDynamicLoading(boolean forceDynamicLoading) Sets the forceDynamicLoading.

Methods inherited from class java.lang.ClassLoader

clearAssertionStatus, defineClass, defineClass, defineClass, definePackage, findLoadedClass, findSystemClass, getPackage, getPackages, getParent, getResource, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, loadClass, 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

DynamicClassLoader

public DynamicClassLoader(java.lang.ClassLoader arg0,
                          DynamicClassFileFinder cff,
                          DynamicResourceFileFinder rff)

Constructor for DynamicClassLoader.

Parameters:

arg0 -

DynamicClassLoader

public DynamicClassLoader(DynamicClassFileFinder cff,
                          DynamicResourceFileFinder rff)

Constructor for DynamicClassLoader.

DynamicClassLoader

public DynamicClassLoader(java.lang.ClassLoader arg0)

DynamicClassLoader

public DynamicClassLoader()

Constructor for DynamicClassLoader.

Method Detail

getClassFileFinder

public DynamicClassFileFinder getClassFileFinder()

getResourceFileFinder

public DynamicResourceFileFinder getResourceFileFinder()

addClassPathEntry

public void addClassPathEntry(java.lang.String entry)

Add a class path entry. * @param entry

setClassPath

public void setClassPath(java.lang.String classPath)

Set the class path. * @param classPath

getClassPath

public java.lang.String getClassPath()

Returnt the current class path

Returns:

the current class path

main

public static void main(java.lang.String[] args)

findClass

protected java.lang.Class findClass(java.lang.String arg0)
                             throws java.lang.ClassNotFoundException

Throws:

java.lang.ClassNotFoundException

See Also:

ClassLoader.findClass(java.lang.String)

findResource

protected java.net.URL findResource(java.lang.String name)

See Also:

ClassLoader.findResource(java.lang.String)

findResources

protected java.util.Enumeration findResources(java.lang.String name)
                                       throws java.io.IOException

Throws:

java.io.IOException

See Also:

ClassLoader.findResources(java.lang.String)

getResourceAsStream

public java.io.InputStream getResourceAsStream(java.lang.String name)

See Also:

ClassLoader.getResourceAsStream(java.lang.String)

isForceDynamicLoading

public boolean isForceDynamicLoading()

Returns the forceDynamicLoading.

Returns:

boolean

setForceDynamicLoading

public void setForceDynamicLoading(boolean forceDynamicLoading)

Sets the forceDynamicLoading.

Parameters:

forceDynamicLoading - The forceDynamicLoading to set

loadClass

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

Throws:

java.lang.ClassNotFoundException

See Also:

ClassLoader.loadClass(java.lang.String, boolean)

findLibrary

protected java.lang.String findLibrary(java.lang.String libname)

Looks for a library in classpath and load it if found.

See Also:

ClassLoader.findLibrary(java.lang.String)