Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
LocalVariableFinder |
|
| 2.25;2.25 |
1 | /* | |
2 | * Copyright (c) 2001-2009, Jean Tessier | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * | |
9 | * * Redistributions of source code must retain the above copyright | |
10 | * notice, this list of conditions and the following disclaimer. | |
11 | * | |
12 | * * Redistributions in binary form must reproduce the above copyright | |
13 | * notice, this list of conditions and the following disclaimer in the | |
14 | * documentation and/or other materials provided with the distribution. | |
15 | * | |
16 | * * Neither the name of Jean Tessier nor the names of his contributors | |
17 | * may be used to endorse or promote products derived from this software | |
18 | * without specific prior written permission. | |
19 | * | |
20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
21 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
23 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR | |
24 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
25 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
26 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
27 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
28 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
29 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
30 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
31 | */ | |
32 | ||
33 | package com.jeantessier.classreader; | |
34 | ||
35 | import org.apache.log4j.*; | |
36 | ||
37 | public class LocalVariableFinder extends VisitorBase { | |
38 | private int localVariableIndex; | |
39 | private int pc; | |
40 | ||
41 | private LocalVariable localVariable; | |
42 | ||
43 | 45 | public LocalVariableFinder(int localVariableIndex, int pc) { |
44 | 45 | this.localVariableIndex = localVariableIndex; |
45 | 45 | this.pc = pc; |
46 | 45 | } |
47 | ||
48 | public LocalVariable getLocalVariable() { | |
49 | 44 | return localVariable; |
50 | } | |
51 | ||
52 | public void visitCode_attribute(Code_attribute attribute) { | |
53 | 29 | Logger.getLogger(getClass()).debug("Visiting " + attribute.getAttributes().size() + " code attribute(s) ..."); |
54 | 29 | for (Attribute_info attribute_info : attribute.getAttributes()) { |
55 | 23 | attribute_info.accept(this); |
56 | } | |
57 | 29 | } |
58 | ||
59 | public void visitLocalVariable(LocalVariable helper) { | |
60 | 36 | super.visitLocalVariable(helper); |
61 | ||
62 | 36 | boolean matching = helper.getIndex() == localVariableIndex && helper.getStartPC() <= pc; |
63 | ||
64 | 36 | if (matching && helper.getLength() > 0) { |
65 | 16 | matching = pc < helper.getStartPC() + helper.getLength(); |
66 | } | |
67 | ||
68 | 36 | if (matching) { |
69 | 21 | localVariable = helper; |
70 | } | |
71 | 36 | } |
72 | } |