org.apache.commons.nabla.forward.instructions
Class NarrowingTransformer

java.lang.Object
  org.apache.commons.nabla.forward.instructions.NarrowingTransformer

All Implemented Interfaces:

InstructionsTransformer

public class NarrowingTransformer
extends Object
implements InstructionsTransformer

Differentiation transformer for narrowing a derivative structure on the stack to a double.

Version:

$Id$

Field Summary

Fields inherited from interface org.apache.commons.nabla.forward.analysis.InstructionsTransformer

DS_TYPE

Constructor Summary

NarrowingTransformer()
Simple constructor.

Method Summary

org.objectweb.asm.tree.InsnList

getReplacement(org.objectweb.asm.tree.AbstractInsnNode insn, MethodDifferentiator methodDifferentiator) Get the replacement instructions.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

NarrowingTransformer

public NarrowingTransformer()

Simple constructor.

Method Detail

getReplacement

public org.objectweb.asm.tree.InsnList getReplacement(org.objectweb.asm.tree.AbstractInsnNode insn,
                                                      MethodDifferentiator methodDifferentiator)
                                               throws DifferentiationException

Get the replacement instructions.

Specified by:

getReplacement in interface InstructionsTransformer

Parameters:

insn - original instruction

methodDifferentiator - method differentiator driving this transformer

Returns:

replacement instructions

Throws:

DifferentiationException - if the method differentiator cannot provide a temporary variable