org.ninjasoft.magiccodes.logic
Class PluginDiscoverer

java.lang.Object
  org.ninjasoft.magiccodes.logic.PluginDiscoverer

public class PluginDiscoverer

extends java.lang.Object

This class will (slightly inefficiently) look for all classes that implement a particular interface. It is useful for plugins. This is done by looking through the contents of all jar files in the classpath, as well as performing a recursive search for *.class files in the classpath directories. This particular class may not work in restrictive ClassLoader environments such as Applets or WebStart. (It may...but unlikely and untested.)

Author:

enigma

Nested Class Summary

class	PluginDiscoverer.classFilter File.listFiles filter that only matches class files
class	PluginDiscoverer.directoryFilter File.listFiles filter that only matches subdirectories

Constructor Summary

PluginDiscoverer()
Construct the object and parse apart the classpath into directories and jars.

Method Summary

java.lang.String[]	findMatchingPlugins(java.lang.Class c) Find all classes in the class path that implement the interface defined in the Class object parameter.
static void	main(java.lang.String[] argv) Simple main function for testing

Methods inherited from class java.lang.Object

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

Constructor Detail

PluginDiscoverer

public PluginDiscoverer()

Construct the object and parse apart the classpath into directories and jars. The constructor simple parses and does not search because the parsing is quick and easy. The actual search work should NOT be done in the constructor, but in the findMatchingPlugins class.

Method Detail

findMatchingPlugins

public java.lang.String[] findMatchingPlugins(java.lang.Class c)

Find all classes in the class path that implement the interface defined in the Class object parameter.

Parameters:

c - a Class object representing the interface we are looking for

Returns:

an array of all the class names that implement that interface

main

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

Simple main function for testing

Parameters:

argv - unused

Throws:

java.lang.Exception - if there was a problem