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      1 /*
      2  * Copyright (C) 2012 The Guava Authors
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  * http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.google.common.base;
     18 
     19 import com.google.common.annotations.GwtCompatible;
     20 import com.google.gwt.user.client.rpc.SerializationException;
     21 import com.google.gwt.user.client.rpc.SerializationStreamReader;
     22 import com.google.gwt.user.client.rpc.SerializationStreamWriter;
     23 
     24 /**
     25  * Custom GWT serializer for {@link Present}.
     26  *
     27  * @author Chris Povirk
     28  */
     29 @GwtCompatible
     30 public class Present_CustomFieldSerializer {
     31   public static void deserialize(SerializationStreamReader reader, Present<?> instance) {}
     32 
     33   public static Present<Object> instantiate(SerializationStreamReader reader)
     34       throws SerializationException {
     35     return (Present<Object>) Optional.of(reader.readObject());
     36   }
     37 
     38   public static void serialize(SerializationStreamWriter writer, Present<?> instance)
     39       throws SerializationException {
     40     writer.writeObject(instance.get());
     41   }
     42 }
     43