Package org.jboss.modules

Interface ClassTransformer

All Known Implementing Classes:
JLIClassTransformer
public interface ClassTransformer
A class file transformer which operates on byte buffers.

  • Field Details

    • IDENTITY

      static final ClassTransformer IDENTITY
      The identity transformation, which does not modify the class bytes at all.

  • Method Details

    • transform

      ByteBuffer transform(ClassLoader loader, String className, ProtectionDomain protectionDomain, ByteBuffer classBytes) throws IllegalArgumentException
      Transform the bytes of a class. The position and limit of both the passed-in and returned buffers must mark the start and end of the class bytes.
      Parameters:
      loader - the class loader of the class being transformed
      className - the internal name of the class being transformed (not null)
      protectionDomain - the protection domain of the class, if any
      classBytes - the class bytes being transformed (not null; may be a direct or heap buffer)
      Returns:
      the transformation result (may be a direct or heap buffer)
      Throws:
      IllegalArgumentException - if the class could not be transformed for some reason

    • andThen

      default ClassTransformer andThen(ClassTransformer other)
      Get a new transformer which applies this transformation followed by another transformation.
      Parameters:
      other - the other transformation (must not be null)
      Returns:
      the new transformer (not null)

    • allOf

      static ClassTransformer allOf(Collection<? extends ClassTransformer> transformers)
      Get a new transformer which applies all the transformations in the given collection. The collection should either be immutable or safe for concurrent iteration. A synchronized collection is insufficiently thread-safe.
      Parameters:
      transformers - the transformer collection (must not be null)
      Returns:
      the new transformer (not null)