net.yagga.util
Class JarClassLoader

java.lang.Object
  |
  +--java.lang.ClassLoader
        |
        +--net.yagga.util.JarClassLoader

class JarClassLoader

extends java.lang.ClassLoader

A class loader for loading jar files, both local and remote.

Inner classes inherited from class java.lang.ClassLoader

java.lang.ClassLoader.NativeLibrary

Field Summary

private java.util.Hashtable	htSizes
private java.lang.String	jarFile

Fields inherited from class java.lang.ClassLoader

bootstrapClassPath, classes, defaultDomain, defaultPermissions, domains, getClassLoaderPerm, initialized, loadedLibraryNames, nativeLibraries, nativeLibraryContext, nocerts, package2certs, packages, parent, scl, sclSet, sys_paths, systemNativeLibraries, usr_paths

Constructor Summary

JarClassLoader(java.lang.String jarF)

Method Summary

protected java.lang.Class	findClass(java.lang.String className)
byte[]	getClassFromJar(java.lang.String cl)
private java.util.jar.JarInputStream	getJIS(java.lang.String jarFile)
java.lang.String	getMainClassName() Returns the name of the jar file main class, or null if no "Main-Class" manifest attributes was defined.
private void	initSizes()
void	invokeClass(java.lang.String name, java.lang.String[] args) Invokes the application in this jar file given the name of the main class and an array of arguments.
private java.io.InputStream	openResource(java.lang.String filename)

Methods inherited from class java.lang.ClassLoader

, addClass, check, checkCerts, checkPackageAccess, compareCerts, defineClass, defineClass, defineClass, defineClass0, definePackage, findBootstrapClass, findBootstrapClass0, findLibrary, findLoadedClass, findNative, findResource, findResources, findSystemClass, getBootstrapClassPath, getBootstrapResource, getBootstrapResources, getCallerClassLoader, getDefaultDomain, getGetClassLoaderPerm, getPackage, getPackages, getParent, getResource, getResourceAsStream, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, initializePath, isAncestor, loadClass, loadClass, loadClassInternal, loadLibrary, loadLibrary0, resolveClass, resolveClass0, setSigners

Methods inherited from class java.lang.Object

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

Field Detail

jarFile

private java.lang.String jarFile

htSizes

private java.util.Hashtable htSizes

Constructor Detail

JarClassLoader

public JarClassLoader(java.lang.String jarF)

Method Detail

getMainClassName

public java.lang.String getMainClassName()
                                  throws java.io.IOException

Returns the name of the jar file main class, or null if no "Main-Class" manifest attributes was defined.

invokeClass

public void invokeClass(java.lang.String name,
                        java.lang.String[] args)
                 throws java.lang.ClassNotFoundException,
                        java.lang.NoSuchMethodException,
                        java.lang.reflect.InvocationTargetException

Invokes the application in this jar file given the name of the main class and an array of arguments. The class must define a static method "main" which takes an array of String arguemtns and is of return type "void".

findClass

protected java.lang.Class findClass(java.lang.String className)
                             throws java.lang.ClassNotFoundException

Overrides:

findClass in class java.lang.ClassLoader

initSizes

private void initSizes()

getClassFromJar

public byte[] getClassFromJar(java.lang.String cl)

getJIS

private java.util.jar.JarInputStream getJIS(java.lang.String jarFile)

openResource

private java.io.InputStream openResource(java.lang.String filename)