| // 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.protobuf.CodedInputStream; |
| import com.google.protobuf.CodedOutputStream; |
| import java.util.Collections; |
| import java.util.List; |
| |
| /** |
| * Codec for {@link Collections.EMPTY_LIST} |
| * |
| * <p>TODO(shahan): this might be better as an AutoCodec field tag, but this package, the logical |
| * home for the codec, is a dependency of AutoCodec, so doing so would create a circular dependency. |
| */ |
| @SuppressWarnings("rawtypes") |
| class EmptyListCodec implements ObjectCodec<List> { |
| |
| @Override |
| public Class<? extends List> getEncodedClass() { |
| return Collections.emptyList().getClass(); |
| } |
| |
| @Override |
| public void serialize( |
| SerializationContext unusedContext, List unusedValue, CodedOutputStream unusedCodedOut) {} |
| |
| @Override |
| public List deserialize(DeserializationContext unusedContext, CodedInputStream unusedCodedIn) { |
| return Collections.emptyList(); |
| } |
| } |