| // Copyright 2019 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 static com.google.devtools.build.lib.skyframe.serialization.MapHelpers.deserializeMapEntries; |
| import static com.google.devtools.build.lib.skyframe.serialization.MapHelpers.serializeMapEntries; |
| |
| import com.google.common.collect.ImmutableClassToInstanceMap; |
| import com.google.common.collect.ImmutableMap; |
| import com.google.protobuf.CodedInputStream; |
| import com.google.protobuf.CodedOutputStream; |
| import java.io.IOException; |
| |
| /** |
| * Encodes an {@link ImmutableClassToInstanceMap}. The iteration order of the deserialized map is |
| * the same as the original map's. |
| * |
| * <p>We handle {@link ImmutableClassToInstanceMap} by treating it as an {@link ImmutableMap} and |
| * calling the proper conversion method ({@link ImmutableClassToInstanceMap#copyOf}) when |
| * deserializing. |
| * |
| * <p>Any {@link SerializationException} or {@link IOException} that arises while serializing or |
| * deserializing a map entry's value (not its key) will be wrapped in a new {@link |
| * SerializationException} using {@link SerializationException#propagate}. (Note that this preserves |
| * the type of {@link SerializationException.NoCodecException} exceptions.) The message will include |
| * the {@code toString()} of the entry's key. For errors that occur while serializing, it will also |
| * include the class name of the entry's value. Errors that occur while serializing an entry key are |
| * not affected. |
| */ |
| @SuppressWarnings({"unchecked", "rawtypes"}) |
| class ImmutableClassToInstanceMapCodec extends DeferredObjectCodec<ImmutableClassToInstanceMap> { |
| |
| @Override |
| public Class<ImmutableClassToInstanceMap> getEncodedClass() { |
| return ImmutableClassToInstanceMap.class; |
| } |
| |
| @Override |
| public void serialize( |
| SerializationContext context, ImmutableClassToInstanceMap map, CodedOutputStream codedOut) |
| throws SerializationException, IOException { |
| codedOut.writeInt32NoTag(map.size()); |
| serializeMapEntries(context, map, codedOut); |
| } |
| |
| @Override |
| public DeferredValue<ImmutableClassToInstanceMap> deserializeDeferred( |
| AsyncDeserializationContext context, CodedInputStream codedIn) |
| throws SerializationException, IOException { |
| int size = codedIn.readInt32(); |
| if (size < 0) { |
| throw new SerializationException("Expected non-negative length: " + size); |
| } |
| if (size == 0) { |
| return ImmutableClassToInstanceMap::of; |
| } |
| |
| EntryBuffer buffer = new EntryBuffer(size); |
| deserializeMapEntries( |
| context, |
| codedIn, |
| buffer.keys, |
| buffer.values); |
| return buffer; |
| } |
| |
| private static class EntryBuffer implements DeferredValue<ImmutableClassToInstanceMap> { |
| final Object[] keys; |
| final Object[] values; |
| |
| private EntryBuffer(int size) { |
| this.keys = new Object[size]; |
| this.values = new Object[size]; |
| } |
| |
| @Override |
| public ImmutableClassToInstanceMap call() { |
| ImmutableClassToInstanceMap.Builder builder = ImmutableClassToInstanceMap.builder(); |
| for (int i = 0; i < size(); i++) { |
| builder.put((Class) keys[i], values[i]); |
| } |
| return builder.build(); |
| } |
| |
| private int size() { |
| return keys.length; |
| } |
| } |
| } |