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