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// Copyright 2017 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.cmdline;
import com.google.devtools.build.lib.skyframe.serialization.DeserializationContext;
import com.google.devtools.build.lib.skyframe.serialization.ObjectCodec;
import com.google.devtools.build.lib.skyframe.serialization.SerializationContext;
import com.google.devtools.build.lib.skyframe.serialization.SerializationException;
import com.google.protobuf.ByteString;
import com.google.protobuf.CodedInputStream;
import com.google.protobuf.CodedOutputStream;
import java.io.IOException;
/** Custom serialization for {@link RepositoryName}. */
public class RepositoryNameCodec implements ObjectCodec<RepositoryName> {
@Override
public Class<RepositoryName> getEncodedClass() {
return RepositoryName.class;
}
@Override
public void serialize(
SerializationContext context, RepositoryName repoName, CodedOutputStream codedOut)
throws IOException {
boolean isMain = repoName.isMain();
// Main is by far the most common. Use boolean to short-circuit string encoding on
// serialization and byte[]/ByteString creation on deserialization.
codedOut.writeBoolNoTag(isMain);
if (!isMain) {
codedOut.writeStringNoTag(repoName.getName());
}
}
@Override
public RepositoryName deserialize(DeserializationContext context, CodedInputStream codedIn)
throws SerializationException, IOException {
boolean isMain = codedIn.readBool();
if (isMain) {
return RepositoryName.MAIN;
}
try {
// We can read the string we wrote back as bytes to avoid string decoding/copying.
return deserializeRepoName(codedIn.readBytes());
} catch (LabelSyntaxException e) {
throw new SerializationException("Failed to deserialize RepositoryName", e);
}
}
private static final ByteString DEFAULT_REPOSITORY =
ByteString.copyFromUtf8(RepositoryName.DEFAULT.getName());
private static final ByteString MAIN_REPOSITORY =
ByteString.copyFromUtf8(RepositoryName.MAIN.getName());
public static RepositoryName deserializeRepoName(ByteString repoNameBytes)
throws LabelSyntaxException {
// We expect MAIN_REPOSITORY the vast majority of the time, so check for it first.
if (repoNameBytes.equals(MAIN_REPOSITORY)) {
return RepositoryName.MAIN;
} else if (repoNameBytes.equals(DEFAULT_REPOSITORY)) {
return RepositoryName.DEFAULT;
} else {
return RepositoryName.create(repoNameBytes.toStringUtf8());
}
}
}
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