ClassFileTransformer (GNU Classpath 0.94-pre Documentation)

This interface should be implemented by classes wishing to transform classes bytecode when defining or redefining classes.

Since: 1.5

Method Summary
byte[]	transform(ClassLoader loader, String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer) Implementation of this method transforms a class by redefining its bytecodes.

Implementation of this method transforms a class by redefining its bytecodes. Once a ClassFileTransformer object registers itself to the Instrumentation object, this method will be called each time a class is defined (ClassLoader.defineClass) or redefined (Instrumentation.redefineClasses)

Parameters: loader the loader of the class className the name of the class with packages separated with "/" classBeingRedefined the class being redefined if it's the case, null otherwise protectionDomain the protection domain of the class being defined or redefined classfileBuffer the input byte buffer in class file format

Returns: a class file buffer or null when no transformation has been performed

Throws: IllegalClassFormatException if the byte buffer does not represent a well-formed class file

Interface ClassFileTransformer

Method Detail

transform