| /* |
| * Copyright 2023 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.datastore.core |
| |
| import androidx.datastore.core.okio.OkioSerializer |
| import com.google.protobuf.ExtensionRegistryLite |
| import com.google.protobuf.InvalidProtocolBufferException |
| import com.google.protobuf.MessageLite |
| import okio.BufferedSink |
| import okio.BufferedSource |
| |
| /** OkioSerializer for using DataStore with protos. */ |
| internal class ProtoOkioSerializer<T : MessageLite>( |
| /** The default proto of this type, obtained via {@code T.getDefaultInstance()} */ |
| override val defaultValue: T, |
| /** |
| * Set the extensionRegistryLite to use when deserializing T. If no extension registry is |
| * necessary, use {@code ExtensionRegistryLite.getEmptyRegistry()}. |
| */ |
| private val extensionRegistryLite: ExtensionRegistryLite = |
| ExtensionRegistryLite.getEmptyRegistry() |
| ) : OkioSerializer<T> { |
| @Suppress("UNCHECKED_CAST") |
| override suspend fun readFrom(source: BufferedSource): T { |
| try { |
| return defaultValue.parserForType.parseFrom( |
| source.inputStream(), |
| extensionRegistryLite |
| ) as T |
| } catch (invalidProtocolBufferException: InvalidProtocolBufferException) { |
| throw CorruptionException( |
| "Cannot read proto.", invalidProtocolBufferException |
| ) |
| } |
| } |
| |
| override suspend fun writeTo(t: T, sink: BufferedSink) { |
| t.writeTo(sink.outputStream()) |
| } |
| } |