jhelp.util.classLoader

Class JHelpJarClassLoader

java.lang.Object

java.lang.ClassLoader

jhelp.util.classLoader.JHelpJarClassLoader

public class JHelpJarClassLoader
extends java.lang.ClassLoader

Loader of class inside several jars

Last modification : 26 mai 2009
Version 0.0.0

Author:

JHelp

Field Summary

Fields

Modifier and Type	Field and Description
private java.util.ArrayList<java.util.jar.JarFile>	arrayList List of jars
private java.lang.ClassLoader	classLoader Reference class loader
private java.util.Hashtable<java.lang.String,java.lang.Class<?>>	loadedClass Already loaded classes

Constructor Summary

Constructors

Constructor and Description
JHelpJarClassLoader() Constructs JHelpClassLoader
JHelpJarClassLoader(java.lang.ClassLoader classLoader) Create a new instance of JHelpJarClassLoader

Method Summary

Methods

Modifier and Type	Method and Description
void	add(java.io.File file) Add a jar file
void	add(java.util.jar.JarFile jarFile) Add a jar file
void	add(java.lang.String name) Add a jar file
java.net.URL	getResource(java.lang.String name) Get URL for a resource
java.io.InputStream	getResourceAsStream(java.lang.String name) Get stream for read a resource
java.util.Enumeration<java.net.URL>	getResources(java.lang.String name) Get all resources with same name
java.util.HashSet<java.lang.String>	listOfDirectInternal(java.lang.String name) List of classes are directly internal to a given one
java.lang.Class<?>	loadClass(java.lang.String name) Load a class
protected java.lang.Class<?>	loadClass(java.lang.String name, boolean resolve) Load a class
void	unloadClass(java.lang.String name) Un load a class

Methods inherited from class java.lang.ClassLoader

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

arrayList

private final java.util.ArrayList<java.util.jar.JarFile> arrayList

List of jars

classLoader

private final java.lang.ClassLoader classLoader

Reference class loader

loadedClass

private final java.util.Hashtable<java.lang.String,java.lang.Class<?>> loadedClass

Already loaded classes

Constructor Detail

JHelpJarClassLoader

public JHelpJarClassLoader()

Constructs JHelpClassLoader

JHelpJarClassLoader

public JHelpJarClassLoader(java.lang.ClassLoader classLoader)

Create a new instance of JHelpJarClassLoader

Parameters:

classLoader - Reference class loader

Method Detail

loadClass

protected java.lang.Class<?> loadClass(java.lang.String name,
                           boolean resolve)
                                throws java.lang.ClassNotFoundException

Load a class

Overrides:

loadClass in class java.lang.ClassLoader

Parameters:

name - Class complete name

resolve - Indicates if have to resolve

Returns:

Loaded class

Throws:

java.lang.ClassNotFoundException - If file not exists in one of jars and can't be retrieve by default class loader

See Also:

ClassLoader.loadClass(java.lang.String, boolean)

add

public void add(java.io.File file)
         throws java.io.IOException

Add a jar file

Parameters:

file - Jar file to add

Throws:

java.io.IOException - If file is not a jar file

add

public void add(java.util.jar.JarFile jarFile)

Add a jar file

Parameters:

jarFile - Jar file to add

add

public void add(java.lang.String name)
         throws java.io.IOException

Add a jar file

Parameters:

name - Jar file path

Throws:

java.io.IOException - If path is not a jar file

getResource

public java.net.URL getResource(java.lang.String name)

Get URL for a resource

Overrides:

getResource in class java.lang.ClassLoader

Parameters:

name - Resource complete name

Returns:

URL on resource or null if resource not found

See Also:

ClassLoader.getResource(java.lang.String)

getResourceAsStream

public java.io.InputStream getResourceAsStream(java.lang.String name)

Get stream for read a resource

Overrides:

getResourceAsStream in class java.lang.ClassLoader

Parameters:

name - Resource complete name

Returns:

Stream for read or null if resource not found

See Also:

ClassLoader.getResourceAsStream(java.lang.String)

getResources

public java.util.Enumeration<java.net.URL> getResources(java.lang.String name)
                                                 throws java.io.IOException

Get all resources with same name

Overrides:

getResources in class java.lang.ClassLoader

Parameters:

name - Resource name

Returns:

List of resources URL

Throws:

java.io.IOException - On creating list issus

See Also:

ClassLoader.getResources(java.lang.String)

listOfDirectInternal

public java.util.HashSet<java.lang.String> listOfDirectInternal(java.lang.String name)

List of classes are directly internal to a given one

Parameters:

name - Class base name

Returns:

List of internal

loadClass

public java.lang.Class<?> loadClass(java.lang.String name)
                             throws java.lang.ClassNotFoundException

Load a class

Overrides:

loadClass in class java.lang.ClassLoader

Parameters:

name - Class complete name

Returns:

Loaded class

Throws:

java.lang.ClassNotFoundException - If class is not found

See Also:

ClassLoader.loadClass(java.lang.String)

unloadClass

public void unloadClass(java.lang.String name)

Un load a class

Parameters:

name - Class complete name