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package mobvista.dmp.format;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hive.serde2.ColumnProjectionUtils;
import org.apache.hadoop.hive.serde2.columnar.BytesRefArrayWritable;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.SequenceFile;
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.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.input.FileSplit;
import java.io.IOException;
import java.util.ArrayList;
/**
* RCFileInputFormat.
*
* @param <K>
* @param <V>
*/
public class RCFileInputFormat<K extends LongWritable, V extends BytesRefArrayWritable>
extends FileInputFormat<K, V>
{
protected long getFormatMinSplitSize()
{
return SequenceFile.SYNC_INTERVAL;
}
public static void setColumnID(Configuration conf, ArrayList<Integer> list)
{
ColumnProjectionUtils.appendReadColumnIDs(conf, list);
}
public static ArrayList<Integer> getReadColumnIDs(Configuration conf)
{
return (ArrayList<Integer>) ColumnProjectionUtils.getReadColumnIDs(conf);
}
@SuppressWarnings("unchecked")
public RecordReader<K, V> createRecordReader(InputSplit split,
TaskAttemptContext context
) throws IOException
{
return new RCFileRecordReader(context.getConfiguration(), (FileSplit) split);
}
}