public interface InstrumentableClassLoader
ClassFileTransformers. These transformers can instrument (or weave) the byte code of classes loaded through this class loader to alter their behavior. Currently only
WebappClassLoaderimplements this interface. This allows web application frameworks or JPA providers bundled with a web application to instrument web application classes as necessary.
You should always program against the methods of this interface
(whether using reflection or otherwise). The methods in
WebappClassLoader are protected by the default security
manager if one is in use.
|Modifier and Type||Method and Description|
Adds the specified class file transformer to this class loader.
Returns a copy of this class loader without any class file transformers.
Removes the specified class file transformer from this class loader.
void addTransformer(ClassFileTransformer transformer)
transformer- The transformer to add to the class loader
IllegalArgumentException- if the transformer is null.
void removeTransformer(ClassFileTransformer transformer)
transformer- The transformer to remove
The returned class loader's resource cache will have been cleared so that classes already instrumented will not be retained or returned.
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