Package org.apache.orc.mapreduce

Class OrcMapreduceRecordReader<V extends WritableComparable>

java.lang.Object

org.apache.hadoop.mapreduce.RecordReader<NullWritable,V>

org.apache.orc.mapreduce.OrcMapreduceRecordReader<V>

Type Parameters:

V - the root type of the file

All Implemented Interfaces:

Closeable, AutoCloseable

public class OrcMapreduceRecordReader<V extends WritableComparable>
extends RecordReader<NullWritable,V>

This record reader implements the org.apache.hadoop.mapreduce API. It is in the org.apache.orc.mapred package to share implementation with the mapred API record reader.

Constructor Summary

Constructors

Constructor	Description
OrcMapreduceRecordReader(Reader fileReader, Reader.Options options)
OrcMapreduceRecordReader(Reader fileReader, Reader.Options options, int rowBatchSize)
OrcMapreduceRecordReader(RecordReader reader, TypeDescription schema)

Method Summary

Modifier and Type	Method	Description
void	close()
NullWritable	getCurrentKey()
V	getCurrentValue()
float	getProgress()
void	initialize(InputSplit inputSplit, TaskAttemptContext taskAttemptContext)
boolean	nextKeyValue()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

OrcMapreduceRecordReader

public OrcMapreduceRecordReader(RecordReader reader,
 TypeDescription schema)
                         throws IOException

Throws:

IOException

OrcMapreduceRecordReader

public OrcMapreduceRecordReader(Reader fileReader,
 Reader.Options options)
                         throws IOException

Throws:

IOException

OrcMapreduceRecordReader

public OrcMapreduceRecordReader(Reader fileReader,
 Reader.Options options,
 int rowBatchSize)
                         throws IOException

Throws:

IOException

Method Details

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Specified by:

close in class RecordReader<NullWritable,V extends WritableComparable>

Throws:

IOException

initialize

public void initialize(InputSplit inputSplit,
 TaskAttemptContext taskAttemptContext)

Specified by:

initialize in class RecordReader<NullWritable,V extends WritableComparable>

nextKeyValue

public boolean nextKeyValue()
                     throws IOException,
InterruptedException

Specified by:

nextKeyValue in class RecordReader<NullWritable,V extends WritableComparable>

Throws:

IOException

InterruptedException

getCurrentKey

public NullWritable getCurrentKey()
                           throws IOException,
InterruptedException

Specified by:

getCurrentKey in class RecordReader<NullWritable,V extends WritableComparable>

Throws:

IOException

InterruptedException

getCurrentValue

public V getCurrentValue()
                  throws IOException,
InterruptedException

Specified by:

getCurrentValue in class RecordReader<NullWritable,V extends WritableComparable>

Throws:

IOException

InterruptedException

getProgress

public float getProgress()
                  throws IOException

Specified by:

getProgress in class RecordReader<NullWritable,V extends WritableComparable>

Throws:

IOException