org.mbari.siam.utils
Class MultiClassLoader

java.lang.Object
  java.lang.ClassLoader
      org.mbari.siam.utils.MultiClassLoader

Direct Known Subclasses:

JarClassLoader

public abstract class MultiClassLoader
extends java.lang.ClassLoader

A simple test class loader capable of loading from multiple sources, such as local files or a URL. This class is derived from an article by Chuck McManis http://www.javaworld.com/javaworld/jw-10-1996/indepth.src.html with large modifications. Note that this has been updated to use the non-deprecated version of defineClass() -- JDM. Based on code found in "Java Tip 70" at "Java World".

Author:

Jack Harich - 8/18/97, John D. Mitchell - 99.03.04

Field Summary

protected boolean	monitorOn
protected boolean	sourceMonitorOn

Constructor Summary

MultiClassLoader()

Method Summary

protected java.lang.String	formatClassName(java.lang.String className)
java.lang.Class	loadClass(java.lang.String className) This is a simple version for external clients since they will always want the class resolved before it is returned to them.
java.lang.Class	loadClass(java.lang.String className, boolean resolveIt)
protected abstract byte[]	loadClassBytes(java.lang.String className)
protected void	monitor(java.lang.String text)
protected static void	print(java.lang.String text)
void	setClassNameReplacementChar(char replacement) This optional call allows a class name such as "COM.test.Hello" to be changed to "COM_test_Hello", which is useful for storing classes from different package org.mbari.siam.utils in the same retrival directory.

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, 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

monitorOn

protected boolean monitorOn

sourceMonitorOn

protected boolean sourceMonitorOn

Constructor Detail

MultiClassLoader

public MultiClassLoader()

Method Detail

loadClass

public java.lang.Class loadClass(java.lang.String className)
                          throws java.lang.ClassNotFoundException

This is a simple version for external clients since they will always want the class resolved before it is returned to them.

Overrides:

loadClass in class java.lang.ClassLoader

Throws:

java.lang.ClassNotFoundException

loadClass

public java.lang.Class loadClass(java.lang.String className,
                                 boolean resolveIt)
                          throws java.lang.ClassNotFoundException

Overrides:

loadClass in class java.lang.ClassLoader

Throws:

java.lang.ClassNotFoundException

setClassNameReplacementChar

public void setClassNameReplacementChar(char replacement)

This optional call allows a class name such as "COM.test.Hello" to be changed to "COM_test_Hello", which is useful for storing classes from different package org.mbari.siam.utils in the same retrival directory. In the above example the char would be '_'.

loadClassBytes

protected abstract byte[] loadClassBytes(java.lang.String className)

formatClassName

protected java.lang.String formatClassName(java.lang.String className)

monitor

protected void monitor(java.lang.String text)

print

protected static void print(java.lang.String text)