org.hibernate.bytecode.buildtime
Class JavassistInstrumenter

java.lang.Object
  org.hibernate.bytecode.buildtime.AbstractInstrumenter
      org.hibernate.bytecode.buildtime.JavassistInstrumenter

All Implemented Interfaces:

Instrumenter

public class JavassistInstrumenter
extends AbstractInstrumenter

Strategy for performing build-time instrumentation of persistent classes in order to enable field-level interception using Javassist.

Author:

Steve Ebersole, Muga Nishizawa

Nested Class Summary

Nested classes/interfaces inherited from class org.hibernate.bytecode.buildtime.AbstractInstrumenter

AbstractInstrumenter.CustomFieldFilter

Nested classes/interfaces inherited from interface org.hibernate.bytecode.buildtime.Instrumenter

Instrumenter.Options

Field Summary

Fields inherited from class org.hibernate.bytecode.buildtime.AbstractInstrumenter

logger, options

Constructor Summary

JavassistInstrumenter(Logger logger, Instrumenter.Options options)

Method Summary

protected ClassDescriptor	getClassDescriptor(byte[] bytecode) Given the bytecode of a java class, retrieve the descriptor for that class.
protected ClassTransformer	getClassTransformer(ClassDescriptor descriptor, Set classNames) Create class transformer for the class.

Methods inherited from class org.hibernate.bytecode.buildtime.AbstractInstrumenter

checkMagic, execute, isClassFile, isJarFile, processClassFile, processFile, processJarFile

Methods inherited from class java.lang.Object

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

Constructor Detail

JavassistInstrumenter

public JavassistInstrumenter(Logger logger,
                             Instrumenter.Options options)

Method Detail

getClassDescriptor

protected ClassDescriptor getClassDescriptor(byte[] bytecode)
                                      throws IOException

Description copied from class: AbstractInstrumenter

Given the bytecode of a java class, retrieve the descriptor for that class.

Specified by:

getClassDescriptor in class AbstractInstrumenter

Parameters:

bytecode - The class bytecode.

Returns:

The class's descriptor

Throws:

IOException

getClassTransformer

protected ClassTransformer getClassTransformer(ClassDescriptor descriptor,
                                               Set classNames)

Description copied from class: AbstractInstrumenter

Create class transformer for the class.

Specified by:

getClassTransformer in class AbstractInstrumenter

Parameters:

descriptor - The descriptor of the class to be instrumented.

classNames - The names of all classes to be instrumented; the "pipeline" if you will.

Returns:

The transformer for the given class; may return null to indicate that transformation should be skipped (ala already instrumented).