CatchMethodItem.java revision ffe82bdcb5c914b3a60b630c6d3abe6fc9229dec 
1/*
2 * [The "BSD licence"]
3 * Copyright (c) 2010 Ben Gruver (JesusFreke)
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 *    derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29package org.jf.baksmali.Adaptors;
30
31import org.jf.util.IndentingWriter;
32
33import java.io.IOException;
34
35public class CatchMethodItem extends MethodItem {
36    private final String exceptionType;
37
38    private final LabelMethodItem tryStartLabel;
39    private final LabelMethodItem tryEndLabel;
40    private final LabelMethodItem handlerLabel;
41
42    public CatchMethodItem(MethodDefinition.LabelCache labelCache, int codeAddress, String exceptionType,
43                           int startAddress, int endAddress, int handlerAddress) {
44        super(codeAddress);
45        this.exceptionType = exceptionType;
46
47        tryStartLabel = labelCache.internLabel(new LabelMethodItem(startAddress, "try_start_"));
48
49        //use the address from the last covered instruction, but make the label
50        //name refer to the address of the next instruction
51        tryEndLabel = labelCache.internLabel(new EndTryLabelMethodItem(codeAddress, endAddress));
52
53        if (exceptionType == null) {
54            handlerLabel = labelCache.internLabel(new LabelMethodItem(handlerAddress, "catchall_"));
55        } else {
56            handlerLabel = labelCache.internLabel(new LabelMethodItem(handlerAddress, "catch_"));
57        }
58    }
59
60    public LabelMethodItem getTryStartLabel() {
61        return tryStartLabel;
62    }
63
64    public LabelMethodItem getTryEndLabel() {
65        return tryEndLabel;
66    }
67
68    public LabelMethodItem getHandlerLabel() {
69        return handlerLabel;
70    }
71
72    public double getSortOrder() {
73        //sort after instruction and end_try label
74        return 102;
75    }
76
77    @Override
78    public boolean writeTo(IndentingWriter writer) throws IOException {
79        if (exceptionType == null) {
80            writer.write(".catchall");
81        } else {
82            writer.write(".catch ");
83            writer.write(exceptionType);
84        }
85        writer.write(" {");
86        tryStartLabel.writeTo(writer);
87        writer.write(" .. ");
88        tryEndLabel.writeTo(writer);
89        writer.write("} ");
90        handlerLabel.writeTo(writer);
91        return true;
92    }
93}
94