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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  }