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org.hibernate.bytecode.javassist
Class TransformingClassLoader  

java.lang.Object
  java.lang.ClassLoader
      org.hibernate.bytecode.javassist.TransformingClassLoader

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public class TransformingClassLoader

extends java.lang.ClassLoader

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Nested Class Summary

 

Nested classes inherited from class java.lang.ClassLoader

 

Field Summary
private  ClassPool	classPool
private  java.lang.ClassLoader	parent

 

Fields inherited from class java.lang.ClassLoader

 

Constructor Summary
(package private)	TransformingClassLoader(java.lang.ClassLoader parent, java.lang.String[] classpath)

 

Method Summary
protected  java.lang.Class	findClass(java.lang.String name)           Called for every class name that is needed but has not yet been defined by this classloader or one of its parents.
void	release()

 

Methods inherited from class java.lang.ClassLoader

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findLibrary, findLoadedClass, findResource, findResources, 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, toString, wait, wait, wait

 

Field Detail

parent

private java.lang.ClassLoader parent

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classPool

private ClassPool classPool

Constructor Detail

TransformingClassLoader

TransformingClassLoader(java.lang.ClassLoader parent,
                        java.lang.String[] classpath)

Method Detail

findClass

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

Description copied from class: java.lang.ClassLoader

Called for every class name that is needed but has not yet been defined by this classloader or one of its parents. It is called by loadClass() after both findLoadedClass() and parent.loadClass() couldn't provide the requested class.

The default implementation throws a ClassNotFoundException. Subclasses should override this method. An implementation of this method in a subclass should get the class bytes of the class (if it can find them), if the package of the requested class doesn't exist it should define the package and finally it should call define the actual class. It does not have to resolve the class. It should look something like the following:

 // Get the bytes that describe the requested class
 byte[] classBytes = classLoaderSpecificWayToFindClassBytes(name);
 // Get the package name
 int lastDot = name.lastIndexOf('.');
 if (lastDot != -1)
   {
     String packageName = name.substring(0, lastDot);
     // Look if the package already exists
     if (getPackage(packageName) == null)
       {
         // define the package
         definePackage(packageName, ...);
       }
   }
 // Define and return the class
  return defineClass(name, classBytes, 0, classBytes.length);
 

loadClass() makes sure that the Class returned by findClass() will later be returned by findLoadedClass() when the same class name is requested.

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release

public void release()

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Home >> All >> org >> hibernate >> bytecode >> [ javassist overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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