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/*
* Copyright (C) 2012 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.base;
import com.google.common.annotations.GwtCompatible;
import com.google.gwt.user.client.rpc.SerializationStreamReader;
import com.google.gwt.user.client.rpc.SerializationStreamWriter;
/**
* Custom GWT serializer for {@link Absent}.
*
* <p>GWT can serialize an absent {@code Optional} on its own, but the resulting object is a
* different instance than the singleton {@code Absent.INSTANCE}, which breaks equality. We
* implement a custom serializer to maintain the singleton property.
*
* @author Chris Povirk
*/
@GwtCompatible
public class Absent_CustomFieldSerializer {
public static void deserialize(SerializationStreamReader reader, Absent instance) {}
public static Absent instantiate(SerializationStreamReader reader) {
return Absent.INSTANCE;
}
public static void serialize(SerializationStreamWriter writer, Absent instance) {}
}
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