MemberIdsSection.java revision 9f0f8b6c64cdff79989be28fff70db39f412de90 
1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.dx.dex.file;
18
19import com.android.dx.util.DexException;
20
21/**
22 * Member (field or method) refs list section of a {@code .dex} file.
23 */
24public abstract class MemberIdsSection extends UniformItemSection {
25    /** The largest addressable member is 0xffff, in the dex spec as field@CCCC or meth@CCCC. */
26    private static final int MAX_MEMBERS = 0x10000;
27
28    /**
29     * Constructs an instance. The file offset is initially unknown.
30     *
31     * @param name {@code null-ok;} the name of this instance, for annotation
32     * purposes
33     * @param file {@code non-null;} file that this instance is part of
34     */
35    public MemberIdsSection(String name, DexFile file) {
36        super(name, file, 4);
37    }
38
39    /** {@inheritDoc} */
40    @Override
41    protected void orderItems() {
42        int idx = 0;
43
44        if (items().size() > MAX_MEMBERS) {
45            String memberType = this instanceof MethodIdsSection ? "methods" : "fields";
46            throw new DexException("Too many " + memberType + ": " + items().size()
47                    + "; max is " + MAX_MEMBERS);
48        }
49
50        for (Object i : items()) {
51            ((MemberIdItem) i).setIndex(idx);
52            idx++;
53        }
54    }
55}
56