| // Copyright 2020 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.collect.ImmutableList; |
| import com.google.protobuf.CodedInputStream; |
| import com.google.protobuf.CodedOutputStream; |
| import com.google.protobuf.LazyStringArrayList; |
| import com.google.protobuf.LazyStringList; |
| import com.google.protobuf.UnmodifiableLazyStringList; |
| import java.io.IOException; |
| import java.util.List; |
| |
| /** Codec for {@link LazyStringList} so protobuf objects have proper type, not just a list. */ |
| class LazyStringListCodec implements ObjectCodec<LazyStringList> { |
| // If LazyStringArrayList.EMPTY ever goes away, just replace with our own empty one. |
| private static final UnmodifiableLazyStringList EMPTY_UNMODIFIABLE = |
| new UnmodifiableLazyStringList(LazyStringArrayList.EMPTY); |
| |
| @Override |
| public Class<LazyStringList> getEncodedClass() { |
| return LazyStringList.class; |
| } |
| |
| @Override |
| public List<Class<? extends LazyStringList>> additionalEncodedClasses() { |
| return ImmutableList.of(UnmodifiableLazyStringList.class, LazyStringArrayList.class); |
| } |
| |
| @Override |
| public void serialize( |
| SerializationContext context, LazyStringList obj, CodedOutputStream codedOut) |
| throws SerializationException, IOException { |
| codedOut.writeInt32NoTag(obj.size()); |
| for (String item : obj) { |
| context.serialize(item, codedOut); |
| } |
| } |
| |
| @Override |
| public UnmodifiableLazyStringList deserialize( |
| DeserializationContext context, CodedInputStream codedIn) |
| throws SerializationException, IOException { |
| int size = codedIn.readInt32(); |
| if (size == 0) { |
| return EMPTY_UNMODIFIABLE; |
| } |
| LazyStringArrayList list = new LazyStringArrayList(size); |
| for (int i = 0; i < size; i++) { |
| list.add((String) context.deserialize(codedIn)); |
| } |
| return new UnmodifiableLazyStringList(list); |
| } |
| } |