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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  
23  /**
24   * This class contains static utility methods for writing {@code Multiset} GWT
25   * field serializers. Serializers should delegate to
26   * {@link #serialize(SerializationStreamWriter, Multiset)} and
27   * {@link #populate(SerializationStreamReader, Multiset)}.
28   *
29   * @author Chris Povirk
30   */
31  final class Multiset_CustomFieldSerializerBase {
32  
33    static Multiset<Object> populate(SerializationStreamReader reader, Multiset<Object> multiset)
34        throws SerializationException {
35      int distinctElements = reader.readInt();
36      for (int i = 0; i < distinctElements; i++) {
37        Object element = reader.readObject();
38        int count = reader.readInt();
39        multiset.add(element, count);
40      }
41      return multiset;
42    }
43  
44    static void serialize(SerializationStreamWriter writer, Multiset<?> instance)
45        throws SerializationException {
46      int entryCount = instance.entrySet().size();
47      writer.writeInt(entryCount);
48      for (Multiset.Entry<?> entry : instance.entrySet()) {
49        writer.writeObject(entry.getElement());
50        writer.writeInt(entry.getCount());
51      }
52    }
53  
54    private Multiset_CustomFieldSerializerBase() {}
55  }