| /* |
| * Copyright (C) 2021 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 androidx.health.services.client.data |
| |
| import android.os.Parcel |
| import android.os.Parcelable |
| import android.os.Parcelable.Creator |
| import androidx.annotation.RestrictTo |
| import com.google.protobuf.MessageLite |
| |
| /** |
| * Base class for parcelables backed by Protocol Buffers. |
| * |
| * Provided [proto] represents everything important to subclasses, they need not implement [equals] |
| * and [hashCode]. |
| * |
| */ |
| @Suppress("ParcelCreator", "ParcelNotFinal") |
| @RestrictTo(RestrictTo.Scope.LIBRARY) |
| public abstract class ProtoParcelable<T : MessageLite> : Parcelable { |
| |
| /** Proto representation of this object. */ |
| public abstract val proto: T |
| |
| /** Serialized representation of this object. */ |
| protected val bytes: ByteArray get() { return proto.toByteArray() } |
| |
| public override fun describeContents(): Int = 0 |
| |
| public override fun writeToParcel(dest: Parcel, flags: Int) { |
| dest.writeByteArray(this.bytes) |
| } |
| |
| override fun equals(other: Any?): Boolean { |
| if (this === other) { |
| return true |
| } |
| |
| // It's possible that two objects from different classes have the same serialized form, |
| // however |
| // they shouldn't be considered equal unless they're of the same class. |
| if (other == null || javaClass != other.javaClass) { |
| return false |
| } |
| |
| val that = other as ProtoParcelable<*> |
| return bytes.contentEquals(that.bytes) |
| } |
| |
| override fun hashCode(): Int = bytes.contentHashCode() |
| |
| public companion object { |
| /** |
| * Constructs and returns a [Creator] based on the provided [parser] accepting a [ByteArray] |
| * . |
| */ |
| @RestrictTo(RestrictTo.Scope.LIBRARY) |
| public inline fun <reified U : ProtoParcelable<*>> newCreator( |
| crossinline parser: (ByteArray) -> U |
| ): Creator<U> { |
| return object : Creator<U> { |
| override fun createFromParcel(source: Parcel): U? { |
| val payload: ByteArray = source.createByteArray() ?: return null |
| return parser(payload) |
| } |
| |
| override fun newArray(size: Int) = arrayOfNulls<U>(size) |
| } |
| } |
| } |
| } |