org.knopflerfish.framework
Class BundleClassLoader

java.lang.Object
  java.lang.ClassLoader
      org.knopflerfish.framework.BundleClassLoader

public final class BundleClassLoader
extends java.lang.ClassLoader

Classloader for bundle JAR files.

Field Summary

protected static org.knopflerfish.framework.BundleClassLoader.SecurityManagerExposer

smex

Method Summary

protected java.lang.Class	findClass(java.lang.String name) Find bundle class to load.
protected java.lang.String	findLibrary(java.lang.String name) Find native library code to load.
protected java.net.URL	findResource(java.lang.String name) Finds the resource with the given name.
protected java.util.Enumeration	findResources(java.lang.String name) Returns an Enumeration of all the resources with the given name.
java.net.URL	getResource(java.lang.String name) Finds the resource with the given name.
java.io.InputStream	getResourceAsStream(java.lang.String name) Finds the resource with the given name and returns the InputStream.
java.util.Enumeration	getResourcesOSGi(java.lang.String name) Finds all the resources with the given name.
boolean	isBootClassContext(java.lang.String msg) Check if the current call is made from a class loaded on the boot class path (or rather, on a class loaded from something else than a bundle class loader)
protected java.lang.Class	loadClass(java.lang.String name, boolean resolve) Find Class and load it.
java.lang.String	toString() Return a string representing this objet

Methods inherited from class java.lang.ClassLoader

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findLoadedClass, findSystemClass, getPackage, getPackages, getParent, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, loadClass, resolveClass, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners

Methods inherited from class java.lang.Object

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

Field Detail

smex

protected static org.knopflerfish.framework.BundleClassLoader.SecurityManagerExposer smex

Method Detail

findClass

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

Find bundle class to load. First check if this load comes from an imported package. Otherwise load class from our bundle.

Overrides:

findClass in class java.lang.ClassLoader

Throws:

java.lang.ClassNotFoundException

See Also:

ClassLoader.findClass(java.lang.String)

findLibrary

protected java.lang.String findLibrary(java.lang.String name)

Find native library code to load.

Overrides:

findLibrary in class java.lang.ClassLoader

See Also:

ClassLoader.findLibrary(java.lang.String)

findResources

protected java.util.Enumeration findResources(java.lang.String name)

Returns an Enumeration of all the resources with the given name.

Overrides:

findResources in class java.lang.ClassLoader

See Also:

ClassLoader.findResources(java.lang.String)

findResource

protected java.net.URL findResource(java.lang.String name)

Finds the resource with the given name.

Overrides:

findResource in class java.lang.ClassLoader

See Also:

ClassLoader.findResource(java.lang.String)

isBootClassContext

public boolean isBootClassContext(java.lang.String msg)

Check if the current call is made from a class loaded on the boot class path (or rather, on a class loaded from something else than a bundle class loader)

loadClass

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

Find Class and load it. This function is abstract in PJava 1.2 so we define it here to work as closely as it can to Java 2. Should work okey if we don't use the Java 2 stuff.

Overrides:

loadClass in class java.lang.ClassLoader

Parameters:

name - the name of the class

resolve - if true then resolve the class

Returns:

the resulting Class object

Throws:

java.lang.ClassNotFoundException - if the class could not be found

See Also:

ClassLoader.loadClass(java.lang.String)

getResource

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

Finds the resource with the given name. This is defined a little different in PJava 1.2 versus Java 2. So we first try to use the super() version and if it fails we try to find it in the local bundle.

Overrides:

getResource in class java.lang.ClassLoader

Parameters:

name - resource name

Returns:

an URL to resource, or null if the resource could not be found or the caller doesn't have adequate privileges to get the resource.

See Also:

ClassLoader.getResource(java.lang.String)

getResourcesOSGi

public java.util.Enumeration getResourcesOSGi(java.lang.String name)
                                       throws java.io.IOException

Finds all the resources with the given name. A resource is some data (images, audio, text, etc) that can be accessed by class code in a way that is independent of the location of the code.

The name of a resource is a /-separated path name that identifies the resource.

Parameters:

name - resource name

Returns:

An enumeration of URL objects for the resource. If no resources could be found, the enumeration will be empty. Resources that the class loader doesn't have access to will not be in the enumeration.

Throws:

java.io.IOException

See Also:

ClassLoader.getResources(java.lang.String), Bundle.getResources(String name)

getResourceAsStream

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

Finds the resource with the given name and returns the InputStream. The method is overridden to make sure it does the right thing.

Overrides:

getResourceAsStream in class java.lang.ClassLoader

Parameters:

name - resource name

Returns:

an InputStream to resource, or null if the resource could not be found or the caller doesn't have adequate privileges to get the resource.

See Also:

ClassLoader.getResourceAsStream(java.lang.String)

toString

public java.lang.String toString()

Return a string representing this objet

Overrides:

toString in class java.lang.Object

Returns:

A message string.