org.apache.hadoop.hive.ql.io.rcfile.merge

Class RCFileBlockMergeRecordReader

java.lang.Object

org.apache.hadoop.hive.ql.io.rcfile.merge.RCFileBlockMergeRecordReader

All Implemented Interfaces:

org.apache.hadoop.mapred.RecordReader<RCFileKeyBufferWrapper,RCFileValueBufferWrapper>

public class RCFileBlockMergeRecordReader
extends Object
implements org.apache.hadoop.mapred.RecordReader<RCFileKeyBufferWrapper,RCFileValueBufferWrapper>

Field Summary

Fields

Modifier and Type	Field and Description
protected org.apache.hadoop.conf.Configuration	conf

Constructor Summary

Constructors

Constructor and Description
RCFileBlockMergeRecordReader(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.mapred.FileSplit split)

Method Summary

Methods

Modifier and Type	Method and Description
void	close()
RCFileKeyBufferWrapper	createKey()
RCFileValueBufferWrapper	createValue()
Class<?>	getKeyClass()
long	getPos()
float	getProgress() Return the progress within the input split.
long	getStart()
Class<?>	getValueClass()
boolean	next(RCFileKeyBufferWrapper key, RCFileValueBufferWrapper value)
protected boolean	nextBlock(RCFileKeyBufferWrapper keyWrapper, RCFileValueBufferWrapper valueWrapper)
protected void	seek(long pos)

Methods inherited from class java.lang.Object

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

Field Detail

conf

protected org.apache.hadoop.conf.Configuration conf

Constructor Detail

RCFileBlockMergeRecordReader

public RCFileBlockMergeRecordReader(org.apache.hadoop.conf.Configuration conf,
                            org.apache.hadoop.mapred.FileSplit split)
                             throws IOException

Throws:

IOException

Method Detail

getKeyClass

public Class<?> getKeyClass()

getValueClass

public Class<?> getValueClass()

createKey

public RCFileKeyBufferWrapper createKey()

Specified by:

createKey in interface org.apache.hadoop.mapred.RecordReader<RCFileKeyBufferWrapper,RCFileValueBufferWrapper>

createValue

public RCFileValueBufferWrapper createValue()

Specified by:

createValue in interface org.apache.hadoop.mapred.RecordReader<RCFileKeyBufferWrapper,RCFileValueBufferWrapper>

next

public boolean next(RCFileKeyBufferWrapper key,
           RCFileValueBufferWrapper value)
             throws IOException

Specified by:

next in interface org.apache.hadoop.mapred.RecordReader<RCFileKeyBufferWrapper,RCFileValueBufferWrapper>

Throws:

IOException

nextBlock

protected boolean nextBlock(RCFileKeyBufferWrapper keyWrapper,
                RCFileValueBufferWrapper valueWrapper)
                     throws IOException

Throws:

IOException

getProgress

public float getProgress()
                  throws IOException

Return the progress within the input split.

Specified by:

getProgress in interface org.apache.hadoop.mapred.RecordReader<RCFileKeyBufferWrapper,RCFileValueBufferWrapper>

Returns:

0.0 to 1.0 of the input byte range

Throws:

IOException

getPos

public long getPos()
            throws IOException

Specified by:

getPos in interface org.apache.hadoop.mapred.RecordReader<RCFileKeyBufferWrapper,RCFileValueBufferWrapper>

Throws:

IOException

seek

protected void seek(long pos)
             throws IOException

Throws:

IOException

getStart

public long getStart()

close

public void close()
           throws IOException

Specified by:

close in interface org.apache.hadoop.mapred.RecordReader<RCFileKeyBufferWrapper,RCFileValueBufferWrapper>

Throws:

IOException