SparseSwitchMethodItem.java revision 16a911620ccf7b530b873fb71cf13e8dcb88ad28 
1/*
2 * [The "BSD licence"]
3 * Copyright (c) 2009 Ben Gruver
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.Format;
30
31import org.antlr.stringtemplate.StringTemplate;
32import org.antlr.stringtemplate.StringTemplateGroup;
33import org.jf.dexlib.Code.Format.SparseSwitchDataPseudoInstruction;
34import org.jf.dexlib.CodeItem;
35import org.jf.baksmali.Adaptors.LabelMethodItem;
36import org.jf.baksmali.Adaptors.MethodDefinition;
37
38import java.util.ArrayList;
39import java.util.Iterator;
40import java.util.List;
41
42public class SparseSwitchMethodItem extends InstructionFormatMethodItem<SparseSwitchDataPseudoInstruction>
43        implements Iterable<LabelMethodItem> {
44    private List<SparseSwitchTarget> targets = new ArrayList<SparseSwitchTarget>();
45
46    public SparseSwitchMethodItem(MethodDefinition.LabelCache labelCache, CodeItem codeItem, int targetAddressOffset,
47                                  StringTemplateGroup stg, SparseSwitchDataPseudoInstruction instruction,
48                                  int baseAddress) {
49        super(codeItem, targetAddressOffset, stg, instruction);
50
51
52        Iterator<SparseSwitchDataPseudoInstruction.SparseSwitchTarget> iterator = instruction.iterateKeysAndTargets();
53        while (iterator.hasNext()) {
54            SparseSwitchDataPseudoInstruction.SparseSwitchTarget target = iterator.next();
55            SparseSwitchTarget sparseSwitchTarget = new SparseSwitchTarget();
56            sparseSwitchTarget.Key = target.key;
57
58            LabelMethodItem label = new LabelMethodItem(baseAddress + target.targetAddressOffset, stg, "sswitch_");
59            label = labelCache.internLabel(label);
60            sparseSwitchTarget.Target = label;
61
62            targets.add(sparseSwitchTarget);
63        }
64    }
65
66    protected void setAttributes(StringTemplate template) {
67        template.setAttribute("Targets", targets);
68    }
69
70    public Iterator<LabelMethodItem> iterator() {
71        return new Iterator<LabelMethodItem>() {
72            private Iterator<SparseSwitchTarget> iterator = targets.iterator();
73
74            public boolean hasNext() {
75                return iterator.hasNext();
76            }
77
78            public LabelMethodItem next() {
79                return iterator.next().Target;
80            }
81
82            public void remove() {
83                iterator.remove();
84            }
85        };
86    }
87
88    private static class SparseSwitchTarget {
89        public int Key;
90        public LabelMethodItem Target;
91    }
92}
93