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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.Comparator;
24  import java.util.SortedMap;
25  import java.util.TreeMap;
26  
27  /**
28   * This class contains static utility methods for writing {@code ImmutableSortedMap} GWT field
29   * serializers.
30   *
31   * @author Chris Povirk
32   */
33  final class ImmutableSortedMap_CustomFieldSerializerBase {
34    static ImmutableSortedMap<Object, Object> instantiate(SerializationStreamReader reader)
35        throws SerializationException {
36      /*
37       * Nothing we can do, but we're already assuming the serialized form is
38       * correctly typed, anyway.
39       */
40      @SuppressWarnings("unchecked")
41      Comparator<Object> comparator = (Comparator<Object>) reader.readObject();
42  
43      SortedMap<Object, Object> entries = new TreeMap<>(comparator);
44      Map_CustomFieldSerializerBase.deserialize(reader, entries);
45  
46      return ImmutableSortedMap.orderedBy(comparator).putAll(entries).build();
47    }
48  
49    static void serialize(SerializationStreamWriter writer, ImmutableSortedMap<?, ?> instance)
50        throws SerializationException {
51      writer.writeObject(instance.comparator());
52  
53      Map_CustomFieldSerializerBase.serialize(writer, instance);
54    }
55  
56    private ImmutableSortedMap_CustomFieldSerializerBase() {}
57  }