/*
    * 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.SerializationException;
  import com.google.gwt.user.client.rpc.SerializationStreamReader;
  import com.google.gwt.user.client.rpc.SerializationStreamWriter;
  
  /**
   * Custom GWT serializer for {@link Present}.
   *
   * @author Chris Povirk
   */
  @GwtCompatible
  public class Present_CustomFieldSerializer {
    public static void deserialize(SerializationStreamReader reader, Present<?> instance) {}
  
    public static Present<Object> instantiate(SerializationStreamReader reader)
        throws SerializationException {
      return (Present<Object>) Optional.of(reader.readObject());
    }
  
    public static void serialize(SerializationStreamWriter writer, Present<?> instance)
        throws SerializationException {
      writer.writeObject(instance.get());
    }
  }