ccs.loader
Class DiagURLClassLoader

java.lang.Object
  java.lang.ClassLoader
      java.security.SecureClassLoader
          java.net.URLClassLoader
              ccs.loader.DiagURLClassLoader

public class DiagURLClassLoader
extends java.net.URLClassLoader

A URLClassLoader with extra methods to help diagnose classloading-related bugs. (These tend to be obscure).

Constructor Summary

DiagURLClassLoader(java.net.URL[] urls, java.lang.ClassLoader parent, java.lang.String loaderID)
A DiagURLClassLoader loading from the supplied URLs.

DiagURLClassLoader(java.net.URL[] urls, java.lang.ClassLoader parent, java.net.URLStreamHandlerFactory factory, java.lang.String loaderID)
A DiagURLClassLoader loading from the supplied URLs.

DiagURLClassLoader(java.net.URL[] urls, java.lang.String loaderID)
A DiagURLClassLoader loading from the supplied URLs.

Method Summary

protected java.lang.Class<?>	findClass(java.lang.String name)
static DiagURLClassLoader	getInstance(java.lang.String[] jarnames, java.lang.ClassLoader parent, java.lang.String loaderID) Create a DiagURLClassLoader based on JAR filenames.
java.lang.String	toString()

Methods inherited from class java.net.URLClassLoader

addURL, definePackage, findResource, findResources, getPermissions, getURLs, newInstance, newInstance

Methods inherited from class java.security.SecureClassLoader

defineClass, defineClass

Methods inherited from class java.lang.ClassLoader

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findLibrary, findLoadedClass, 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, wait, wait, wait

Constructor Detail

DiagURLClassLoader

public DiagURLClassLoader(java.net.URL[] urls,
                          java.lang.String loaderID)

A DiagURLClassLoader loading from the supplied URLs.

Parameters:

urls - The URLs pointing to JARs to use.

loaderID - A meaningful ID for this Classloader. This is used to generate diagnostic messages.

DiagURLClassLoader

public DiagURLClassLoader(java.net.URL[] urls,
                          java.lang.ClassLoader parent,
                          java.lang.String loaderID)

A DiagURLClassLoader loading from the supplied URLs.

Parameters:

urls - The URLs pointing to JARs to use.

parent - The delegation parent.

loaderID - A meaningful ID for this Classloader. This is used to generate diagnostic messages.

DiagURLClassLoader

public DiagURLClassLoader(java.net.URL[] urls,
                          java.lang.ClassLoader parent,
                          java.net.URLStreamHandlerFactory factory,
                          java.lang.String loaderID)

A DiagURLClassLoader loading from the supplied URLs.

Parameters:

urls - The URLs pointing to JARs to use.

parent - The delegation parent.

factory - The URLStreamHandlerFactory to when resolving URLs

loaderID - A meaningful ID for this Classloader. This is used to generate diagnostic messages.

Method Detail

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

findClass

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

Overrides:

findClass in class java.net.URLClassLoader

Throws:

java.lang.ClassNotFoundException

getInstance

public static DiagURLClassLoader getInstance(java.lang.String[] jarnames,
                                             java.lang.ClassLoader parent,
                                             java.lang.String loaderID)
                                      throws java.io.IOException

Create a DiagURLClassLoader based on JAR filenames.

Parameters:

jarnames - The filenames of the JARs, located in ~cpoint/lib

parent - The delegation parent

loaderID - A meaningful ID for this Classloader. This is used to generate diagnostic messages.

Returns:

The classloader.

Throws:

java.io.IOException - Only on a technicality; should never happen.