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1   /*
2    * Copyright (C) 2009 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.collect;
18  
19  import com.google.gwt.user.client.rpc.SerializationException;
20  import com.google.gwt.user.client.rpc.SerializationStreamReader;
21  import com.google.gwt.user.client.rpc.SerializationStreamWriter;
22  import com.google.gwt.user.client.rpc.core.java.util.Map_CustomFieldSerializerBase;
23  import java.util.LinkedHashMap;
24  import java.util.Map;
25  
26  /**
27   * This class implements the GWT serialization of {@link RegularImmutableMap}.
28   *
29   * @author Hayward Chan
30   */
31  public class RegularImmutableMap_CustomFieldSerializer {
32  
33    public static void deserialize(
34        SerializationStreamReader reader, RegularImmutableMap<?, ?> instance) {}
35  
36    public static RegularImmutableMap<Object, Object> instantiate(SerializationStreamReader reader)
37        throws SerializationException {
38      Map<Object, Object> entries = new LinkedHashMap<>();
39      Map_CustomFieldSerializerBase.deserialize(reader, entries);
40      /*
41       * For this custom field serializer to be invoked, the map must have been
42       * RegularImmutableMap before it's serialized.  Since RegularImmutableMap
43       * always have two or more elements, ImmutableMap.copyOf always return
44       * a RegularImmutableMap back.
45       */
46      return (RegularImmutableMap<Object, Object>) ImmutableMap.copyOf(entries);
47    }
48  
49    public static void serialize(SerializationStreamWriter writer, RegularImmutableMap<?, ?> instance)
50        throws SerializationException {
51      Map_CustomFieldSerializerBase.serialize(writer, instance);
52    }
53  }