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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *     http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  
19  package org.apache.giraph.writable.kryo.serializers;
20  
21  
22  import com.esotericsoftware.kryo.Kryo;
23  import com.esotericsoftware.kryo.io.Input;
24  import com.esotericsoftware.kryo.serializers.MapSerializer;
25  import com.google.common.collect.ImmutableMap;
26  
27  import java.util.HashMap;
28  import java.util.Map;
29  
30  /**
31   * Serializer for {@link ImmutableMap}
32   */
33  public class ImmutableMapSerializer extends MapSerializer {
34    @Override
35    public Map read(Kryo kryo, Input input, Class<Map> type) {
36      Map map = super.read(kryo, input,
37          (Class<Map>) ((Object) HashMap.class));
38      return ImmutableMap.copyOf(map);
39    }
40  }