/**
* 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.pig.piggybank.storage.hiverc;
import java.io.IOException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hive.ql.io.RCFileRecordReader;
import org.apache.hadoop.hive.serde2.columnar.BytesRefArrayWritable;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.mapreduce.InputSplit;
import org.apache.hadoop.mapreduce.RecordReader;
import org.apache.hadoop.mapreduce.TaskAttemptContext;
import org.apache.hadoop.mapreduce.lib.input.FileSplit;
/**
* This class delegates the work to the RCFileRecordReader<br/>
*/
public class HiveRCRecordReader extends
RecordReader<LongWritable, BytesRefArrayWritable> {
LongWritable key;
BytesRefArrayWritable value;
RCFileRecordReader<LongWritable, BytesRefArrayWritable> rcFileRecordReader;
Path splitPath = null;
@Override
public void close() throws IOException {
rcFileRecordReader.close();
}
@Override
public LongWritable getCurrentKey() throws IOException,
InterruptedException {
return key;
}
@Override
public BytesRefArrayWritable getCurrentValue() throws IOException,
InterruptedException {
return value;
}
@Override
public float getProgress() throws IOException, InterruptedException {
return rcFileRecordReader.getProgress();
}
public Path getSplitPath() {
return splitPath;
}
@SuppressWarnings("deprecation")
@Override
public void initialize(InputSplit split, TaskAttemptContext ctx)
throws IOException, InterruptedException {
FileSplit fileSplit = (FileSplit) split;
Configuration conf = ctx.getConfiguration();
splitPath = fileSplit.getPath();
rcFileRecordReader = new RCFileRecordReader<LongWritable, BytesRefArrayWritable>(
conf, new org.apache.hadoop.mapred.FileSplit(splitPath,
fileSplit.getStart(), fileSplit.getLength(),
new org.apache.hadoop.mapred.JobConf(conf)));
key = rcFileRecordReader.createKey();
value = rcFileRecordReader.createValue();
}
@Override
public boolean nextKeyValue() throws IOException, InterruptedException {
return rcFileRecordReader.next(key, value);
}
}