1/*
2 * Copyright (C) 2011 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.content.pm;
18
19import android.os.Parcel;
20import android.os.Parcelable;
21
22import java.util.Collections;
23import java.util.List;
24
25/**
26 * Transfer a large list of Parcelable objects across an IPC.  Splits into
27 * multiple transactions if needed.
28 *
29 * @see BaseParceledListSlice
30 *
31 * @hide
32 */
33public class ParceledListSlice<T extends Parcelable> extends BaseParceledListSlice<T> {
34    public ParceledListSlice(List<T> list) {
35        super(list);
36    }
37
38    private ParceledListSlice(Parcel in, ClassLoader loader) {
39        super(in, loader);
40    }
41
42    public static <T extends Parcelable> ParceledListSlice<T> emptyList() {
43        return new ParceledListSlice<T>(Collections.<T> emptyList());
44    }
45
46    @Override
47    public int describeContents() {
48        int contents = 0;
49        final List<T> list = getList();
50        for (int i=0; i<list.size(); i++) {
51            contents |= list.get(i).describeContents();
52        }
53        return contents;
54    }
55
56    @Override
57    protected void writeElement(T parcelable, Parcel dest, int callFlags) {
58        parcelable.writeToParcel(dest, callFlags);
59    }
60
61    @Override
62    protected void writeParcelableCreator(T parcelable, Parcel dest) {
63        dest.writeParcelableCreator((Parcelable) parcelable);
64    }
65
66    @Override
67    protected Parcelable.Creator<?> readParcelableCreator(Parcel from, ClassLoader loader) {
68        return from.readParcelableCreator(loader);
69    }
70
71    @SuppressWarnings("unchecked")
72    public static final Parcelable.ClassLoaderCreator<ParceledListSlice> CREATOR =
73            new Parcelable.ClassLoaderCreator<ParceledListSlice>() {
74        public ParceledListSlice createFromParcel(Parcel in) {
75            return new ParceledListSlice(in, null);
76        }
77
78        @Override
79        public ParceledListSlice createFromParcel(Parcel in, ClassLoader loader) {
80            return new ParceledListSlice(in, loader);
81        }
82
83        @Override
84        public ParceledListSlice[] newArray(int size) {
85            return new ParceledListSlice[size];
86        }
87    };
88}
89