nz.ac.waikato.mcennis.rat
Class DynamicLoader

java.lang.Object
  java.lang.ClassLoader
      nz.ac.waikato.mcennis.rat.DynamicLoader

public class DynamicLoader
extends java.lang.ClassLoader

Dynamic Loader handles the initialization of all factory objects in Graph-RAT. All internal factories and classes need to be added manually to either the lists here or to their respective factory class. Classes or factories loaded by dynamic linking do not have this restriction and do not require a configuration file.

Field Summary

static boolean

isInitialized

Method Summary

void	addFactoryType(AbstractFactory factory) Method called by Factory objects to register themselves with the DynamicLoader.
protected void	findClass(java.lang.String prefix, java.io.File currentDirectory, java.util.LinkedList<java.lang.String> names, java.util.LinkedList<java.io.File> files)
static void	initialization() Initializes the DynamicLoader, initializing in turn all other internal factory objects.
protected void	loadClass(java.lang.String name, java.io.InputStream fileStream)
void	loadClasses() Attempts to find the directory determined by the GRAPH_RAT environment variable.
protected void	loadMaps(java.lang.Class name)
static DynamicLoader	newInstance() Singleton creation method for this DynamicLoader.

Methods inherited from class java.lang.ClassLoader

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

Methods inherited from class java.lang.Object

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

Field Detail

isInitialized

public static boolean isInitialized

Method Detail

newInstance

public static DynamicLoader newInstance()

Singleton creation method for this DynamicLoader. static callers should call initialization() before attempting to use this object.

initialization

public static void initialization()

Initializes the DynamicLoader, initializing in turn all other internal factory objects.

loadClasses

public void loadClasses()

Attempts to find the directory determined by the GRAPH_RAT environment variable. If this does not exist, it utilizes the current directory. All classes contained in the /lib directory are loaded and then all jar files located in the /jar directory are loaded. The loading process is two pass. In the first pass, all objects are registered with the JVM. In the second pass, all objects in these directories are automatically registered with the appropriate factory objects.

findClass

protected void findClass(java.lang.String prefix,
                         java.io.File currentDirectory,
                         java.util.LinkedList<java.lang.String> names,
                         java.util.LinkedList<java.io.File> files)

loadClass

protected void loadClass(java.lang.String name,
                         java.io.InputStream fileStream)
                  throws java.io.IOException,
                         java.lang.ClassNotFoundException

Throws:

java.io.IOException

java.lang.ClassNotFoundException

loadMaps

protected void loadMaps(java.lang.Class name)

addFactoryType

public void addFactoryType(AbstractFactory factory)

Method called by Factory objects to register themselves with the DynamicLoader. This is done automatically if the code specified in the AbstractFactory Javadoc is included in the factory source.

Parameters:

factory - factory object to be registered with the dynamic factory.