| /* |
| * Copyright (C) 2019 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.net.shared; |
| |
| import android.annotation.NonNull; |
| |
| import java.lang.reflect.Array; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.function.Function; |
| |
| /** |
| * Utility methods to help convert to/from stable parcelables. |
| * @hide |
| */ |
| public final class ParcelableUtil { |
| // Below methods could be implemented easily with streams, but streams are frowned upon in |
| // frameworks code. |
| |
| /** |
| * Convert a list of BaseType items to an array of ParcelableType items using the specified |
| * converter function. |
| */ |
| public static <ParcelableType, BaseType> ParcelableType[] toParcelableArray( |
| @NonNull Collection<BaseType> base, |
| @NonNull Function<BaseType, ParcelableType> conv, |
| @NonNull Class<ParcelableType> parcelClass) { |
| final ParcelableType[] out = (ParcelableType[]) Array.newInstance(parcelClass, base.size()); |
| int i = 0; |
| for (BaseType b : base) { |
| out[i] = conv.apply(b); |
| i++; |
| } |
| return out; |
| } |
| |
| /** |
| * Convert an array of ParcelableType items to a list of BaseType items using the specified |
| * converter function. |
| */ |
| public static <ParcelableType, BaseType> ArrayList<BaseType> fromParcelableArray( |
| @NonNull ParcelableType[] parceled, @NonNull Function<ParcelableType, BaseType> conv) { |
| final ArrayList<BaseType> out = new ArrayList<>(parceled.length); |
| for (ParcelableType t : parceled) { |
| out.add(conv.apply(t)); |
| } |
| return out; |
| } |
| } |