| // Copyright 2018 The Bazel Authors. All rights reserved. |
| // |
| // 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 com.google.devtools.build.lib.skyframe.serialization; |
| |
| import com.google.common.base.Optional; |
| import com.google.protobuf.CodedInputStream; |
| import com.google.protobuf.CodedOutputStream; |
| import java.io.IOException; |
| |
| /** {@link ObjectCodec} for {@link Optional}. */ |
| class OptionalCodec implements ObjectCodec<Optional<?>> { |
| @SuppressWarnings("unchecked") |
| @Override |
| public Class<Optional<?>> getEncodedClass() { |
| return (Class<Optional<?>>) (Class<?>) Optional.class; |
| } |
| |
| @Override |
| public void serialize(SerializationContext context, Optional<?> obj, CodedOutputStream codedOut) |
| throws SerializationException, IOException { |
| codedOut.writeBoolNoTag(obj.isPresent()); |
| if (obj.isPresent()) { |
| context.serialize(obj.get(), codedOut); |
| } |
| } |
| |
| @Override |
| public Optional<?> deserialize(DeserializationContext context, CodedInputStream codedIn) |
| throws SerializationException, IOException { |
| if (!codedIn.readBool()) { |
| return Optional.absent(); |
| } |
| return Optional.of(context.deserialize(codedIn)); |
| } |
| } |