MethodIdItem.java revision cc3be5df1e6cf941ee3fab4a6f78a3c08922be59 
1/*
2 * Copyright 2013, Google Inc.
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 are
7 * met:
8 *
9 *     * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *     * Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following disclaimer
13 * in the documentation and/or other materials provided with the
14 * distribution.
15 *     * Neither the name of Google Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32package org.jf.dexlib2.dexbacked.raw;
33
34import org.jf.dexlib2.dexbacked.DexBackedDexFile;
35import org.jf.dexlib2.util.AnnotatedBytes;
36
37import javax.annotation.Nonnull;
38
39public class MethodIdItem {
40    public static final int ITEM_SIZE = 8;
41
42    public static final int CLASS_OFFSET = 0;
43    public static final int PROTO_OFFSET = 2;
44    public static final int NAME_OFFSET = 4;
45
46    @Nonnull
47    public static SectionAnnotator getAnnotator() {
48        return new SectionAnnotator() {
49            @Nonnull @Override public String getItemName() {
50                return "method_id_item";
51            }
52
53            @Override
54            protected void annotateItem(@Nonnull AnnotatedBytes out, @Nonnull RawDexFile dexFile, int itemIndex) {
55                int classIndex = dexFile.readUshort(out.getCursor());
56                out.annotate(2, "class_idx = %s", TypeIdItem.getReferenceAnnotation(dexFile, classIndex));
57
58                int protoIndex = dexFile.readUshort(out.getCursor());
59                out.annotate(2, "proto_idx = %s", ProtoIdItem.getReferenceAnnotation(dexFile, protoIndex));
60
61                int nameIndex = dexFile.readSmallUint(out.getCursor());
62                out.annotate(4, "name_idx = %s", StringIdItem.getReferenceAnnotation(dexFile, nameIndex));
63            }
64        };
65    }
66
67    @Nonnull
68    public static String asString(@Nonnull DexBackedDexFile dexFile, int methodIndex) {
69        int methodOffset = dexFile.getMethodIdItemOffset(methodIndex);
70        int classIndex = dexFile.readUshort(methodOffset + CLASS_OFFSET);
71        String classType = dexFile.getType(classIndex);
72
73        int protoIndex = dexFile.readUshort(methodOffset + PROTO_OFFSET);
74        String protoString = ProtoIdItem.asString(dexFile, protoIndex);
75
76        int nameIndex = dexFile.readSmallUint(methodOffset + NAME_OFFSET);
77        String methodName = dexFile.getString(nameIndex);
78
79        return String.format("%s->%s%s", classType, methodName, protoString);
80    }
81
82    @Nonnull
83    public static String getReferenceAnnotation(@Nonnull DexBackedDexFile dexFile, int methodIndex) {
84        try {
85            String methodString = asString(dexFile, methodIndex);
86            return String.format("method_id_item[%d]: %s", methodIndex, methodString);
87        } catch (Exception ex) {
88            ex.printStackTrace(System.err);
89        }
90        return String.format("method_id_item[%d]", methodIndex);
91    }
92}
93