| // 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.collect; |
| |
| import static com.google.devtools.build.lib.skyframe.serialization.ArrayProcessor.deserializeObjectArray; |
| |
| import com.google.common.collect.FluentIterable; |
| import com.google.common.collect.Iterators; |
| import com.google.common.collect.Lists; |
| import com.google.devtools.build.lib.skyframe.serialization.AsyncDeserializationContext; |
| import com.google.devtools.build.lib.skyframe.serialization.AsyncObjectCodec; |
| import com.google.devtools.build.lib.skyframe.serialization.SerializationContext; |
| import com.google.devtools.build.lib.skyframe.serialization.SerializationException; |
| import com.google.protobuf.CodedInputStream; |
| import com.google.protobuf.CodedOutputStream; |
| import java.io.IOException; |
| import java.util.Collection; |
| import java.util.Iterator; |
| |
| @SuppressWarnings({"rawtypes", "unchecked"}) |
| class IterableCodecs { |
| /** |
| * Codec for {@link FluentIterable}. |
| * |
| * <p>{@link FluentIterable} isn't directly used, but instances are created through {@link |
| * com.google.common.collect.Iterables#concat}. |
| */ |
| static class FluentIterableCodec extends AsyncObjectCodec<FluentIterable> { |
| @Override |
| public Class<FluentIterable> getEncodedClass() { |
| return FluentIterable.class; |
| } |
| |
| @Override |
| public void serialize( |
| SerializationContext context, FluentIterable obj, CodedOutputStream codedOut) |
| throws SerializationException, IOException { |
| IterableCodecs.serialize(context, obj, codedOut); |
| } |
| |
| @Override |
| public FluentIterable deserializeAsync( |
| AsyncDeserializationContext context, CodedInputStream codedIn) |
| throws SerializationException, IOException { |
| int count = codedIn.readInt32(); |
| if (count == 0) { |
| FluentIterable empty = FluentIterable.of(); |
| context.registerInitialValue(empty); |
| return empty; |
| } |
| |
| Object[] elements = new Object[count]; |
| DeserializedFluentIterable value = new DeserializedFluentIterable(elements); |
| context.registerInitialValue(value); |
| |
| deserializeObjectArray(context, codedIn, elements, count); |
| |
| return value; |
| } |
| } |
| |
| /** This imitates the anonymous implementation in {@link FluentIterable#from}. */ |
| private static final class DeserializedFluentIterable extends FluentIterable { |
| private final Object[] elements; |
| |
| private DeserializedFluentIterable(Object[] elements) { |
| this.elements = elements; |
| } |
| |
| @Override |
| public Iterator iterator() { |
| return Iterators.forArray(elements); |
| } |
| } |
| |
| private static void serialize( |
| SerializationContext context, Iterable obj, CodedOutputStream codedOut) |
| throws SerializationException, IOException { |
| Collection elements = obj instanceof Collection ? (Collection) obj : Lists.newArrayList(obj); |
| codedOut.writeInt32NoTag(elements.size()); |
| for (Object elt : elements) { |
| context.serialize(elt, codedOut); |
| } |
| } |
| } |