java.lang.Object
- org.springframework.instrument.classloading.ReflectiveLoadTimeWeaver

All Implemented Interfaces:
LoadTimeWeaver
```
public class ReflectiveLoadTimeWeaver
extends Object
implements LoadTimeWeaver
```
LoadTimeWeaver which uses reflection to delegate to an underlying ClassLoader with well-known transformation hooks. The underlying ClassLoader is expected to support the following weaving methods (as defined in the LoadTimeWeaver interface):
- public void addTransformer(java.lang.instrument.ClassFileTransformer): for registering the given ClassFileTransformer on this ClassLoader
- public ClassLoader getThrowawayClassLoader(): for obtaining a throwaway class loader for this ClassLoader (optional; ReflectiveLoadTimeWeaver will fall back to a SimpleThrowawayClassLoader if that method isn't available)
Please note that the above methods must reside in a class that is publicly accessible, although the class itself does not have to be visible to the application's class loader.
The reflective nature of this LoadTimeWeaver is particularly useful when the underlying ClassLoader implementation is loaded in a different class loader itself (such as the application server's class loader which is not visible to the web application). There is no direct API dependency between this LoadTimeWeaver adapter and the underlying ClassLoader, just a 'loose' method contract.
This is the LoadTimeWeaver to use e.g. with the Resin application server version 3.1+.
Since:
2.0
Author:
Costin Leau, Juergen Hoeller
See Also:
addTransformer(java.lang.instrument.ClassFileTransformer), getThrowawayClassLoader(), SimpleThrowawayClassLoader

Constructor Summary

Constructors
Constructor	Description
`ReflectiveLoadTimeWeaver()`	Create a new ReflectiveLoadTimeWeaver for the current context class loader, which needs to support the required weaving methods.
`ReflectiveLoadTimeWeaver(ClassLoader classLoader)`	Create a new SimpleLoadTimeWeaver for the given class loader.

Method Summary

All Methods Instance Methods Concrete Methods
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()`	Return a throwaway `ClassLoader`, enabling classes to be loaded and inspected without affecting the parent `ClassLoader`.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ReflectiveLoadTimeWeaver
```
public ReflectiveLoadTimeWeaver()
```
    Create a new ReflectiveLoadTimeWeaver for the current context class loader, which needs to support the required weaving methods.
  - ReflectiveLoadTimeWeaver
```
public ReflectiveLoadTimeWeaver(@Nullable
                                ClassLoader classLoader)
```
    Create a new SimpleLoadTimeWeaver for the given class loader.
    Parameters:
    classLoader - the ClassLoader to delegate to for weaving (must support the required weaving methods).
    Throws:
    IllegalStateException - if the supplied ClassLoader does not support the required weaving methods
- Method Detail
  - 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()
```
    Description copied from interface: LoadTimeWeaver
    Return a throwaway ClassLoader, enabling classes to be loaded and inspected without affecting the parent ClassLoader.
    Should not return the same instance of the ClassLoader returned from an invocation of LoadTimeWeaver.getInstrumentableClassLoader().
    Specified by:
    getThrowawayClassLoader in interface LoadTimeWeaver
    Returns:
    a temporary throwaway ClassLoader; should return a new instance for each call, with no existing state

Class ReflectiveLoadTimeWeaver

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

ReflectiveLoadTimeWeaver

ReflectiveLoadTimeWeaver

Method Detail

addTransformer

getInstrumentableClassLoader

getThrowawayClassLoader