org.springframework.instrument.classloading
Class SimpleLoadTimeWeaver

java.lang.Object
  org.springframework.instrument.classloading.SimpleLoadTimeWeaver

All Implemented Interfaces:

LoadTimeWeaver

public class SimpleLoadTimeWeaver
extends java.lang.Object
implements LoadTimeWeaver

LoadTimeWeaver that builds and exposes a SimpleInstrumentableClassLoader.

Mainly intended for testing environments, where it is sufficient to perform all class transformation on a newly created ClassLoader instance.

Since:

2.0

Author:

Rod Johnson, Juergen Hoeller

See Also:

getInstrumentableClassLoader(), SimpleInstrumentableClassLoader, ReflectiveLoadTimeWeaver

Field Summary

private SimpleInstrumentableClassLoader

classLoader

Constructor Summary

SimpleLoadTimeWeaver()
Create a new SimpleLoadTimeWeaver for the current context ClassLoader.

SimpleLoadTimeWeaver(SimpleInstrumentableClassLoader classLoader)
Create a new SimpleLoadTimeWeaver for the given ClassLoader.

Method Summary

void	addTransformer(java.lang.instrument.ClassFileTransformer transformer) Add a ClassFileTransformer to be applied by this LoadTimeWeaver.
java.lang.ClassLoader	getInstrumentableClassLoader() Return a ClassLoader that supports instrumentation through AspectJ-style load-time weaving based on user-defined ClassFileTransformers.
java.lang.ClassLoader	getThrowawayClassLoader() This implementation builds a SimpleThrowawayClassLoader.

Methods inherited from class java.lang.Object

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

Field Detail

classLoader

private final SimpleInstrumentableClassLoader classLoader

Constructor Detail

SimpleLoadTimeWeaver

public SimpleLoadTimeWeaver()

Create a new SimpleLoadTimeWeaver for the current context ClassLoader.

See Also:

SimpleInstrumentableClassLoader

SimpleLoadTimeWeaver

public SimpleLoadTimeWeaver(SimpleInstrumentableClassLoader classLoader)

Create a new SimpleLoadTimeWeaver for the given ClassLoader.

Parameters:

classLoader - the ClassLoader to build a simple instrumentable ClassLoader on top of

Method Detail

addTransformer

public void addTransformer(java.lang.instrument.ClassFileTransformer transformer)

Description copied from interface: LoadTimeWeaver

Add a ClassFileTransformer to be applied by this LoadTimeWeaver.

Specified by:

addTransformer in interface LoadTimeWeaver

Parameters:

transformer - the ClassFileTransformer to add

getInstrumentableClassLoader

public java.lang.ClassLoader getInstrumentableClassLoader()

Description copied from interface: LoadTimeWeaver

Return a ClassLoader that supports instrumentation through AspectJ-style load-time weaving based on user-defined ClassFileTransformers.

May be the current ClassLoader, or a ClassLoader created by this LoadTimeWeaver instance.

Specified by:

getInstrumentableClassLoader in interface LoadTimeWeaver

Returns:

the ClassLoader which will expose instrumented classes according to the registered transformers

getThrowawayClassLoader

public java.lang.ClassLoader getThrowawayClassLoader()

This implementation builds a SimpleThrowawayClassLoader.

Specified by:

getThrowawayClassLoader in interface LoadTimeWeaver

Returns:

a temporary throwaway ClassLoader; should return a new instance for each call, with no existing state