001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements.  See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership.  The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the
007     * "License"); you may not use this file except in compliance
008     * with the License.  You may obtain a copy of the License at
009     *
010     *     http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing, software
013     * distributed under the License is distributed on an "AS IS" BASIS,
014     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    
019    package org.apache.hadoop.io.serializer.avro;
020    
021    import org.apache.avro.Schema;
022    import org.apache.avro.io.DatumReader;
023    import org.apache.avro.io.DatumWriter;
024    import org.apache.avro.specific.SpecificDatumReader;
025    import org.apache.avro.specific.SpecificDatumWriter;
026    import org.apache.avro.specific.SpecificRecord;
027    import org.apache.hadoop.classification.InterfaceAudience;
028    import org.apache.hadoop.classification.InterfaceStability;
029    
030    /**
031     * Serialization for Avro Specific classes. This serialization is to be used 
032     * for classes generated by Avro's 'specific' compiler.
033     */
034    @SuppressWarnings("unchecked")
035    @InterfaceAudience.Public
036    @InterfaceStability.Evolving
037    public class AvroSpecificSerialization 
038                              extends AvroSerialization<SpecificRecord>{
039    
040      @InterfaceAudience.Private
041      @Override
042      public boolean accept(Class<?> c) {
043        return SpecificRecord.class.isAssignableFrom(c);
044      }
045    
046      @InterfaceAudience.Private
047      @Override
048      public DatumReader getReader(Class<SpecificRecord> clazz) {
049        try {
050          return new SpecificDatumReader(clazz.newInstance().getSchema());
051        } catch (Exception e) {
052          throw new RuntimeException(e);
053        }
054      }
055    
056      @InterfaceAudience.Private
057      @Override
058      public Schema getSchema(SpecificRecord t) {
059        return t.getSchema();
060      }
061    
062      @InterfaceAudience.Private
063      @Override
064      public DatumWriter getWriter(Class<SpecificRecord> clazz) {
065        return new SpecificDatumWriter();
066      }
067    
068    }