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// 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.skyframe.serialization;
import com.google.common.collect.ImmutableTable;
import com.google.common.collect.Table.Cell;
import com.google.protobuf.CodedInputStream;
import com.google.protobuf.CodedOutputStream;
import java.io.IOException;
import java.util.Set;
/** Codec for {@link ImmutableTable}. */
public class ImmutableTableCodec<R, C, V> implements ObjectCodec<ImmutableTable<R, C, V>> {
@SuppressWarnings("unchecked")
@Override
public Class<ImmutableTable<R, C, V>> getEncodedClass() {
// Compiler doesn't like to do a direct cast.
return (Class<ImmutableTable<R, C, V>>) ((Class<?>) ImmutableTable.class);
}
@Override
public void serialize(
SerializationContext context, ImmutableTable<R, C, V> object, CodedOutputStream codedOut)
throws SerializationException, IOException {
Set<Cell<R, C, V>> cellSet = object.cellSet();
codedOut.writeInt32NoTag(cellSet.size());
for (Cell<R, C, V> cell : cellSet) {
context.serialize(cell.getRowKey(), codedOut);
context.serialize(cell.getColumnKey(), codedOut);
context.serialize(cell.getValue(), codedOut);
}
}
@Override
public ImmutableTable<R, C, V> deserialize(
DeserializationContext context, CodedInputStream codedIn)
throws SerializationException, IOException {
int length = codedIn.readInt32();
if (length < 0) {
throw new SerializationException("Expected non-negative length: " + length);
}
ImmutableTable.Builder<R, C, V> builder = ImmutableTable.builder();
for (int i = 0; i < length; i++) {
builder.put(
/*rowKey=*/ context.deserialize(codedIn),
/*columnKey=*/ context.deserialize(codedIn),
/*value=*/ context.deserialize(codedIn));
}
return builder.build();
}
}
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