1 /* 2 * Copyright (C) 2021 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 17 package com.android.server.apphibernation; 18 19 import android.annotation.NonNull; 20 import android.annotation.Nullable; 21 import android.util.proto.ProtoInputStream; 22 import android.util.proto.ProtoOutputStream; 23 24 import java.io.IOException; 25 26 /** 27 * Proto utility that reads and writes proto for some data. 28 * 29 * @param <T> data that can be written and read from a proto 30 */ 31 interface ProtoReadWriter<T> { 32 33 /** 34 * Write data to a proto stream 35 */ writeToProto(@onNull ProtoOutputStream stream, @NonNull T data)36 void writeToProto(@NonNull ProtoOutputStream stream, @NonNull T data); 37 38 /** 39 * Parse data from the proto stream and return 40 */ readFromProto(@onNull ProtoInputStream stream)41 @Nullable T readFromProto(@NonNull ProtoInputStream stream) throws IOException; 42 } 43