hadoop AvroSpecificSerialization 源码
haddop AvroSpecificSerialization 代码
文件路径：/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/serializer/avro/AvroSpecificSerialization.java
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.io.serializer.avro;
import org.apache.avro.Schema;
import org.apache.avro.io.DatumReader;
import org.apache.avro.io.DatumWriter;
import org.apache.avro.specific.SpecificDatumReader;
import org.apache.avro.specific.SpecificDatumWriter;
import org.apache.avro.specific.SpecificRecord;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
/**
* Serialization for Avro Specific classes. This serialization is to be used
* for classes generated by Avro's 'specific' compiler.
*/
@SuppressWarnings("unchecked")
@InterfaceAudience.Public
@InterfaceStability.Evolving
public class AvroSpecificSerialization
extends AvroSerialization<SpecificRecord>{
@InterfaceAudience.Private
@Override
public boolean accept(Class<?> c) {
return SpecificRecord.class.isAssignableFrom(c);
}
@InterfaceAudience.Private
@Override
public DatumReader getReader(Class<SpecificRecord> clazz) {
try {
return new SpecificDatumReader(clazz.newInstance().getSchema());
} catch (Exception e) {
throw new RuntimeException(e);
}
}
@InterfaceAudience.Private
@Override
public Schema getSchema(SpecificRecord t) {
return t.getSchema();
}
@InterfaceAudience.Private
@Override
public DatumWriter getWriter(Class<SpecificRecord> clazz) {
return new SpecificDatumWriter();
}
}
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