guava-gwt/src/com/google/common/collect/ImmutableSetMultimap_CustomFieldSerializer.java

/*
 * Copyright (C) 2009 The Guava Authors
 *
 * 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.common.collect;

import com.google.gwt.user.client.rpc.SerializationException;
import com.google.gwt.user.client.rpc.SerializationStreamReader;
import com.google.gwt.user.client.rpc.SerializationStreamWriter;
import java.util.Comparator;

/**
 * This class implements the GWT serialization of {@link ImmutableSetMultimap}.
 *
 * @author Chris Povirk
 */
public class ImmutableSetMultimap_CustomFieldSerializer {

  public static void deserialize(
      SerializationStreamReader reader, ImmutableSetMultimap<?, ?> instance) {}

  // Serialization type safety is at the caller's mercy.
  @SuppressWarnings("unchecked")
  public static ImmutableSetMultimap<Object, Object> instantiate(SerializationStreamReader reader)
      throws SerializationException {
    Comparator<Object> valueComparator = (Comparator<Object>) reader.readObject();
    ImmutableSetMultimap.Builder<Object, Object> builder = ImmutableSetMultimap.builder();
    if (valueComparator != null) {
      builder.orderValuesBy(valueComparator);
    }
    return (ImmutableSetMultimap<Object, Object>)
        Multimap_CustomFieldSerializerBase.instantiate(reader, builder);
  }

  public static void serialize(
      SerializationStreamWriter writer, ImmutableSetMultimap<?, ?> instance)
      throws SerializationException {
    writer.writeObject(instance.valueComparator());
    Multimap_CustomFieldSerializerBase.serialize(writer, instance);
  }
}