Package org.springframework.instrument.classloading

Class SimpleLoadTimeWeaver

java.lang.Object

org.springframework.instrument.classloading.SimpleLoadTimeWeaver

All Implemented Interfaces:

LoadTimeWeaver

public class SimpleLoadTimeWeaver
extends 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

Constructor Summary

Constructors

Constructor	Description
SimpleLoadTimeWeaver()	Create a new SimpleLoadTimeWeaver for the current context ClassLoader.
SimpleLoadTimeWeaver(SimpleInstrumentableClassLoader classLoader)	Create a new SimpleLoadTimeWeaver for the given ClassLoader.

Method Summary

Modifier and Type	Method	Description
void	addTransformer(ClassFileTransformer transformer)	Add a ClassFileTransformer to be applied by this LoadTimeWeaver.
ClassLoader	getInstrumentableClassLoader()	Return a ClassLoader that supports instrumentation through AspectJ-style load-time weaving based on user-defined ClassFileTransformers.
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

Constructor Details

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 Details

addTransformer

public void addTransformer(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 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 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