1/*
2 * Copyright (C) 2015 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 android.os;
18
19/**
20 * Helper class for reading pooling strings from a Parcel.  It must be used
21 * in conjunction with {@link android.os.PooledStringWriter}.  This really needs
22 * to be pushed in to Parcel itself, but doing that is...  complicated.
23 * @hide
24 */
25public class PooledStringReader {
26    private final Parcel mIn;
27
28    /**
29     * The pool of strings we have collected so far.
30     */
31    private final String[] mPool;
32
33    public PooledStringReader(Parcel in) {
34        mIn = in;
35        final int size = in.readInt();
36        mPool = new String[size];
37    }
38
39    public int getStringCount() {
40        return mPool.length;
41    }
42
43    public String readString() {
44        int idx = mIn.readInt();
45        if (idx >= 0) {
46            return mPool[idx];
47        } else {
48            idx = (-idx) - 1;
49            String str = mIn.readString();
50            mPool[idx] = str;
51            return str;
52        }
53    }
54}
55