edu.ucla.loni.LOVE

Class PluginLoader

java.lang.Object

java.lang.ClassLoader

edu.ucla.loni.LOVE.PluginLoader

public class PluginLoader
extends java.lang.ClassLoader

This class will look at .class files under plugins folder and retrieve these classes for use as plugins.

It provides centralized service for plugin loading. All the plugin classes that are loaded before will be stored in cache for later usages.

The reason to extend ClassLoader is that we can use those native, protected method of it. Those method can provide many powerful functionality.

BUG/TO DO: Still don't know how to deal with Jarred class file. if classes are jarred, the program can no longer list all the files in the directory thus can't load classes.

Constructor Summary

Constructors

Constructor and Description
PluginLoader()

Method Summary

Methods

Modifier and Type	Method and Description
static java.lang.Class	loadAClass(java.lang.String className) Load a single class as specified by the parameter.
static java.util.Hashtable	loadDirectory(java.lang.String packDir) Load the classes in a directory .plugins.* Example of usage: loadDirectory("edu.ucla.loni.LOVE.plugin.colormap");
static void	main(java.lang.String[] args) Test program

Methods inherited from class java.lang.ClassLoader

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

PluginLoader

public PluginLoader()

Method Detail

loadDirectory

public static java.util.Hashtable loadDirectory(java.lang.String packDir)

Load the classes in a directory .plugins.* Example of usage: loadDirectory("edu.ucla.loni.LOVE.plugin.colormap");

Parameters:

packDir - The directory to be loaded

loadAClass

public static java.lang.Class loadAClass(java.lang.String className)

Load a single class as specified by the parameter.

Parameters:

className - Name of the class, including package name.

main

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

Test program

Throws:

java.lang.Exception