DexBackedExceptionHandler.java revision 005690e8553ad8db7900fd57aef20909662b89b5 
1/*
2 * Copyright 2012, 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
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29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32package org.jf.dexlib2.dexbacked;
33
34import org.jf.dexlib2.immutable.ImmutableExceptionHandler;
35
36import javax.annotation.Nonnull;
37
38public class DexBackedExceptionHandler extends ImmutableExceptionHandler {
39    private DexBackedExceptionHandler(String exceptionType, int handlerCodeOffset) {
40        // TODO: verify dalvik doesn't accept an exception handler that points in the middle of an instruction
41        super(exceptionType, handlerCodeOffset);
42    }
43
44    // static factory method, because we can't read from the reader in the correct order while calling super() in the
45    // constructor. ugh.
46    public static DexBackedExceptionHandler createNew(@Nonnull DexReader reader) {
47        int typeId = reader.readSmallUleb128();
48        String exceptionType = reader.getType(typeId);
49        int handlerCodeOffset = reader.readSmallUleb128();
50        return new DexBackedExceptionHandler(exceptionType, handlerCodeOffset);
51    }
52
53    public static void skipFrom(@Nonnull DexReader reader) {
54        reader.skipUleb128();
55        reader.skipUleb128();
56    }
57}
58