Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
NarrowingTransformer |
|
| 1.0;1 |
1 | /* | |
2 | * Licensed to the Apache Software Foundation (ASF) under one or more | |
3 | * contributor license agreements. See the NOTICE file distributed with | |
4 | * this work for additional information regarding copyright ownership. | |
5 | * The ASF licenses this file to You under the Apache License, Version 2.0 | |
6 | * (the "License"); you may not use this file except in compliance with | |
7 | * the License. You may obtain a copy of the License at | |
8 | * | |
9 | * http://www.apache.org/licenses/LICENSE-2.0 | |
10 | * | |
11 | * Unless required by applicable law or agreed to in writing, software | |
12 | * distributed under the License is distributed on an "AS IS" BASIS, | |
13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
14 | * See the License for the specific language governing permissions and | |
15 | * limitations under the License. | |
16 | */ | |
17 | package org.apache.commons.nabla.forward.instructions; | |
18 | ||
19 | import org.apache.commons.nabla.DifferentiationException; | |
20 | import org.apache.commons.nabla.forward.analysis.InstructionsTransformer; | |
21 | import org.apache.commons.nabla.forward.analysis.MethodDifferentiator; | |
22 | import org.objectweb.asm.Opcodes; | |
23 | import org.objectweb.asm.Type; | |
24 | import org.objectweb.asm.tree.AbstractInsnNode; | |
25 | import org.objectweb.asm.tree.InsnList; | |
26 | import org.objectweb.asm.tree.InsnNode; | |
27 | import org.objectweb.asm.tree.MethodInsnNode; | |
28 | ||
29 | /** Differentiation transformer for narrowing a derivative structure on the stack | |
30 | * to a double. | |
31 | * @version $Id$ | |
32 | */ | |
33 | public class NarrowingTransformer implements InstructionsTransformer { | |
34 | ||
35 | /** Simple constructor. | |
36 | */ | |
37 | 1 | public NarrowingTransformer() { |
38 | 1 | } |
39 | ||
40 | /** {@inheritDoc} */ | |
41 | public InsnList getReplacement(final AbstractInsnNode insn, | |
42 | final MethodDifferentiator methodDifferentiator) | |
43 | throws DifferentiationException { | |
44 | ||
45 | 1 | final InsnList list = new InsnList(); |
46 | ||
47 | 1 | list.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, DS_TYPE.getInternalName(), |
48 | "getValue", | |
49 | Type.getMethodDescriptor(Type.DOUBLE_TYPE))); | |
50 | ||
51 | // copy the instruction consuming the double (D2I, D2L or D2F) | |
52 | 1 | list.add(new InsnNode(insn.getOpcode())); |
53 | ||
54 | 1 | return list; |
55 | ||
56 | } | |
57 | ||
58 | } |