public class ReflectiveLoadTimeWeaver extends Object implements LoadTimeWeaver
LoadTimeWeaverwhich 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
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+.
|Constructor and Description|
Create a new ReflectiveLoadTimeWeaver for the current context class loader, which needs to support the required weaving methods.
Create a new SimpleLoadTimeWeaver for the given class loader.
|Modifier and Type||Method and Description|
Return a throwaway
public ReflectiveLoadTimeWeaver(@Nullable ClassLoader classLoader)
ClassLoaderto delegate to for weaving (must support the required weaving methods).
IllegalStateException- if the supplied
ClassLoaderdoes not support the required weaving methods
public void addTransformer(ClassFileTransformer transformer)
ClassFileTransformerto be applied by this
public ClassLoader getInstrumentableClassLoader()
ClassLoaderthat supports instrumentation through AspectJ-style load-time weaving based on user-defined
May be the current
ClassLoader, or a
created by this
public ClassLoader getThrowawayClassLoader()
ClassLoader, enabling classes to be loaded and inspected without affecting the parent