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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.vfs;
import com.google.common.base.Preconditions;
import com.google.devtools.build.lib.skyframe.serialization.ObjectCodec;
import com.google.devtools.build.lib.skyframe.serialization.SerializationException;
import com.google.protobuf.CodedInputStream;
import com.google.protobuf.CodedOutputStream;
import java.io.IOException;
/** Custom serialization for {@link Path}s. */
public class PathCodec implements ObjectCodec<Path> {
private final FileSystem fileSystem;
private final PathFragmentCodec pathFragmentCodec;
/** Create an instance for serializing and deserializing {@link Path}s on {@code fileSystem}. */
public PathCodec(FileSystem fileSystem) {
this.fileSystem = fileSystem;
this.pathFragmentCodec = new PathFragmentCodec();
}
@Override
public Class<Path> getEncodedClass() {
return Path.class;
}
@Override
public void serialize(Path path, CodedOutputStream codedOut)
throws IOException, SerializationException {
Preconditions.checkState(
path.getFileSystem() == fileSystem,
"Path's FileSystem (%s) did not match the configured FileSystem (%s)",
path.getFileSystem(),
fileSystem);
pathFragmentCodec.serialize(path.asFragment(), codedOut);
}
@Override
public Path deserialize(CodedInputStream codedIn) throws IOException, SerializationException {
PathFragment pathFragment = pathFragmentCodec.deserialize(codedIn);
return fileSystem.getPath(pathFragment);
}
}
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