19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2006 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpackage android.view; 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.os.Parcel; 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.os.Parcelable; 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * A {@link Parcelable} implementation that should be used by inheritance 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * hierarchies to ensure the state of all classes along the chain is saved. 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic abstract class AbsSavedState implements Parcelable { 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static final AbsSavedState EMPTY_STATE = new AbsSavedState() {}; 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final Parcelable mSuperState; 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Constructor used to make the EMPTY_STATE singleton 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private AbsSavedState() { 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSuperState = null; 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Constructor called by derived classes when creating their SavedState objects 4002e81a094f7b9a374b0bf54bd621566f458fe7b5Chris Banes * 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param superState The state of the superclass of this view 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected AbsSavedState(Parcelable superState) { 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (superState == null) { 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("superState must not be null"); 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSuperState = superState != EMPTY_STATE ? superState : null; 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Constructor used when reading from a parcel. Reads the state of the superclass. 5202e81a094f7b9a374b0bf54bd621566f458fe7b5Chris Banes * 5302e81a094f7b9a374b0bf54bd621566f458fe7b5Chris Banes * @param source parcel to read from 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected AbsSavedState(Parcel source) { 5602e81a094f7b9a374b0bf54bd621566f458fe7b5Chris Banes this(source, null); 5702e81a094f7b9a374b0bf54bd621566f458fe7b5Chris Banes } 5802e81a094f7b9a374b0bf54bd621566f458fe7b5Chris Banes 5902e81a094f7b9a374b0bf54bd621566f458fe7b5Chris Banes /** 6002e81a094f7b9a374b0bf54bd621566f458fe7b5Chris Banes * Constructor used when reading from a parcel using a given class loader. 6102e81a094f7b9a374b0bf54bd621566f458fe7b5Chris Banes * Reads the state of the superclass. 6202e81a094f7b9a374b0bf54bd621566f458fe7b5Chris Banes * 6302e81a094f7b9a374b0bf54bd621566f458fe7b5Chris Banes * @param source parcel to read from 6402e81a094f7b9a374b0bf54bd621566f458fe7b5Chris Banes * @param loader ClassLoader to use for reading 6502e81a094f7b9a374b0bf54bd621566f458fe7b5Chris Banes */ 6602e81a094f7b9a374b0bf54bd621566f458fe7b5Chris Banes protected AbsSavedState(Parcel source, ClassLoader loader) { 6702e81a094f7b9a374b0bf54bd621566f458fe7b5Chris Banes Parcelable superState = source.readParcelable(loader); 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSuperState = superState != null ? superState : EMPTY_STATE; 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final public Parcelable getSuperState() { 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mSuperState; 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int describeContents() { 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0; 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void writeToParcel(Parcel dest, int flags) { 8002e81a094f7b9a374b0bf54bd621566f458fe7b5Chris Banes dest.writeParcelable(mSuperState, flags); 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 8302e81a094f7b9a374b0bf54bd621566f458fe7b5Chris Banes public static final Parcelable.Creator<AbsSavedState> CREATOR 8402e81a094f7b9a374b0bf54bd621566f458fe7b5Chris Banes = new Parcelable.ClassLoaderCreator<AbsSavedState>() { 8502e81a094f7b9a374b0bf54bd621566f458fe7b5Chris Banes 8602e81a094f7b9a374b0bf54bd621566f458fe7b5Chris Banes @Override 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public AbsSavedState createFromParcel(Parcel in) { 8802e81a094f7b9a374b0bf54bd621566f458fe7b5Chris Banes return createFromParcel(in, null); 8902e81a094f7b9a374b0bf54bd621566f458fe7b5Chris Banes } 9002e81a094f7b9a374b0bf54bd621566f458fe7b5Chris Banes 9102e81a094f7b9a374b0bf54bd621566f458fe7b5Chris Banes @Override 9202e81a094f7b9a374b0bf54bd621566f458fe7b5Chris Banes public AbsSavedState createFromParcel(Parcel in, ClassLoader loader) { 9302e81a094f7b9a374b0bf54bd621566f458fe7b5Chris Banes Parcelable superState = in.readParcelable(loader); 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (superState != null) { 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalStateException("superState must be null"); 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return EMPTY_STATE; 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 10002e81a094f7b9a374b0bf54bd621566f458fe7b5Chris Banes @Override 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public AbsSavedState[] newArray(int size) { 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new AbsSavedState[size]; 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project }; 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 106