webfunds.utils
Class DirClassLoader

java.lang.Object
  |
  +--java.lang.ClassLoader
        |
        +--webfunds.utils.DirClassLoader

public class DirClassLoader

extends java.lang.ClassLoader

A Directory-based class loader for plugins and wallets.

Constructor Summary

DirClassLoader(java.lang.String[] systemClasses)           Loader to allow dynamic loading from systemClasses only.

DirClassLoader(java.lang.String dir, java.lang.String[] systemClasses)           Loader to allow dynamic loading from directory dir, and having access to all classes within systemClasses.

 

Method Summary
void	init(java.lang.String[] systemClasses)
java.lang.Class	loadClass(java.lang.String name, boolean resolve)           To load an actual class in dir (above), call loadClass with the dot-separated name of the class.
protected  byte[]	loadClassData(java.lang.String name)
protected  void	logmsg(java.lang.String s)
static void	main(java.lang.String[] args)

 

Methods inherited from class java.lang.ClassLoader

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

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

DirClassLoader

public DirClassLoader(java.lang.String dir,
                      java.lang.String[] systemClasses)
               throws java.io.FileNotFoundException

Loader to allow dynamic loading from directory dir, and having access to all classes within systemClasses. As used in WebFunds, the wallet directory containing the compiled classes (for example ../classes) is passed as dir. Then, the names of the WebFunds' other hierarchies is passed as systemClasses, so that the rest of WebFunds might be made available to the plugged-in wallet.

Parameters:

dir - the location of the classes that this Loader is plugging in.

systemClasses - a list of hierarchies that are system, not plugin. (Note that "java" is added by default)

DirClassLoader

public DirClassLoader(java.lang.String[] systemClasses)

Loader to allow dynamic loading from systemClasses only. Compatible with other constructors, but uses Classpath only, so non-3rd-party packages can be treated in the same way.

Parameters:

systemClasses - a list of hierarchies that are system, not plugin. (Note that "java" is added by default)

logmsg

protected void logmsg(java.lang.String s)

init

public void init(java.lang.String[] systemClasses)

loadClassData

protected byte[] loadClassData(java.lang.String name)
                        throws java.lang.ClassNotFoundException

loadClass

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

To load an actual class in dir (above), call loadClass with the dot-separated name of the class.

Overrides:

loadClass in class java.lang.ClassLoader

Parameters:

name - is the class name to be loaded (com.my.plugin)

main

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