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
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.value;
33
34import org.jf.dexlib2.base.value.BaseArrayEncodedValue;
35import org.jf.dexlib2.dexbacked.DexBackedDexFile;
36import org.jf.dexlib2.dexbacked.DexReader;
37import org.jf.dexlib2.dexbacked.util.VariableSizeList;
38import org.jf.dexlib2.iface.value.ArrayEncodedValue;
39import org.jf.dexlib2.iface.value.EncodedValue;
40
41import javax.annotation.Nonnull;
42import java.util.List;
43
44public class DexBackedArrayEncodedValue extends BaseArrayEncodedValue implements ArrayEncodedValue {
45    @Nonnull public final DexBackedDexFile dexFile;
46    private final int elementCount;
47    private final int encodedArrayOffset;
48
49    public DexBackedArrayEncodedValue(@Nonnull DexReader reader) {
50        this.dexFile = reader.dexBuf;
51        this.elementCount = reader.readSmallUleb128();
52        this.encodedArrayOffset = reader.getOffset();
53        skipElementsFrom(reader, elementCount);
54    }
55
56    public static void skipFrom(@Nonnull DexReader reader) {
57        int elementCount = reader.readSmallUleb128();
58        skipElementsFrom(reader, elementCount);
59    }
60
61    private static void skipElementsFrom(@Nonnull DexReader reader, int elementCount) {
62        for (int i=0; i<elementCount; i++) {
63            DexBackedEncodedValue.skipFrom(reader);
64        }
65    }
66
67    @Nonnull
68    @Override
69    public List<? extends EncodedValue> getValue() {
70        return new VariableSizeList<EncodedValue>(dexFile, encodedArrayOffset, elementCount) {
71            @Nonnull
72            @Override
73            protected EncodedValue readNextItem(@Nonnull DexReader dexReader, int index) {
74                return DexBackedEncodedValue.readFrom(dexReader);
75            }
76        };
77    }
78}
79