/**
* 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.hive.serde.thrift;
import org.apache.hadoop.hive.serde.*;
import java.util.List;
import java.util.Properties;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.io.Writable;
import com.facebook.thrift.protocol.TProtocolFactory;
public class ThriftSerDe implements SerDe {
private ThriftByteStreamTypedSerDe tsd;
private boolean inStreaming;
public void initialize(Configuration job, Properties tbl) throws SerDeException {
try {
// both the classname and the protocol name are Table properties
// the only hardwired assumption is that records are fixed on a
// per Table basis
String className = tbl.getProperty(org.apache.hadoop.hive.serde.Constants.SERIALIZATION_CLASS);
Class<?> recordClass = Class.forName(className);
String protoName = tbl.getProperty(org.apache.hadoop.hive.serde.Constants.SERIALIZATION_FORMAT);
if(protoName == null) {
protoName = "TBinaryProtocol";
}
TProtocolFactory tp = TReflectionUtils.getProtocolFactoryByName(protoName);
tsd = new ThriftByteStreamTypedSerDe (recordClass, tp, tp);
inStreaming = job.get("hive.streaming.select") != null;
} catch (Exception e) {
throw new SerDeException(e);
}
}
public Object deserialize(Writable field) throws SerDeException {
return(tsd.deserialize(field));
}
public Writable serialize(Object obj) throws SerDeException {
return (tsd.serialize(obj));
}
public SerDeField getFieldFromExpression(SerDeField parentField, String fieldExpression)
throws SerDeException {
return (tsd.getFieldFromExpression(parentField, fieldExpression));
}
public List<SerDeField> getFields(SerDeField parentField) throws SerDeException {
return (tsd.getFields(parentField));
}
public String toJSONString(Object obj, SerDeField hf) throws SerDeException {
return(tsd.toJSONString(obj, hf));
}
}