/**
* 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.accumulo.serde;
import java.io.IOException;
import java.lang.reflect.Constructor;
import java.util.Properties;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hive.accumulo.Utils;
import org.apache.hadoop.hive.serde2.SerDeException;
import org.apache.hadoop.hive.serde2.lazy.objectinspector.LazySimpleStructObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* {@link AccumuloRowIdFactory} designed for injection of the {@link AccumuloCompositeRowId} to be
* used to generate the Accumulo rowId. Allows for custom {@link AccumuloCompositeRowId}s to be
* specified without overriding the entire ObjectInspector for the Hive row.
*
* @param <T>
*/
public class CompositeAccumuloRowIdFactory<T extends AccumuloCompositeRowId> extends
DefaultAccumuloRowIdFactory {
public static final Logger log = LoggerFactory.getLogger(CompositeAccumuloRowIdFactory.class);
private final Class<T> keyClass;
private final Constructor<T> constructor;
public CompositeAccumuloRowIdFactory(Class<T> keyClass) throws SecurityException,
NoSuchMethodException {
// see javadoc of AccumuloCompositeRowId
this.keyClass = keyClass;
this.constructor = keyClass.getDeclaredConstructor(LazySimpleStructObjectInspector.class,
Properties.class, Configuration.class);
}
@Override
public void addDependencyJars(Configuration jobConf) throws IOException {
// Make sure the jar containing the custom CompositeRowId is included
// in the mapreduce job's classpath (libjars)
Utils.addDependencyJars(jobConf, keyClass);
}
@Override
public T createRowId(ObjectInspector inspector) throws SerDeException {
try {
return (T) constructor.newInstance(inspector, this.properties,
this.accumuloSerDeParams.getConf());
} catch (Exception e) {
throw new SerDeException(e);
}
}
}