org.apache.mahout.text

Class LuceneSegmentInputSplit

java.lang.Object

org.apache.hadoop.mapreduce.InputSplit

org.apache.mahout.text.LuceneSegmentInputSplit

All Implemented Interfaces:

org.apache.hadoop.io.Writable

public class LuceneSegmentInputSplit
extends org.apache.hadoop.mapreduce.InputSplit
implements org.apache.hadoop.io.Writable

InputSplit implementation that represents a Lucene segment.

Constructor Summary

Constructors

Constructor and Description
LuceneSegmentInputSplit()
LuceneSegmentInputSplit(org.apache.hadoop.fs.Path indexPath, String segmentInfoName, long length)

Method Summary

Methods

Modifier and Type	Method and Description
org.apache.hadoop.fs.Path	getIndexPath()
long	getLength()
String[]	getLocations()
org.apache.lucene.index.SegmentInfoPerCommit	getSegment(org.apache.hadoop.conf.Configuration configuration) Get the SegmentInfo of this InputSplit via the given Configuration
String	getSegmentInfoName()
void	readFields(DataInput in)
void	write(DataOutput out)

Methods inherited from class java.lang.Object

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

Constructor Detail

LuceneSegmentInputSplit

public LuceneSegmentInputSplit()

LuceneSegmentInputSplit

public LuceneSegmentInputSplit(org.apache.hadoop.fs.Path indexPath,
                       String segmentInfoName,
                       long length)

Method Detail

getLength

public long getLength()
               throws IOException,
                      InterruptedException

Specified by:

getLength in class org.apache.hadoop.mapreduce.InputSplit

Throws:

IOException

InterruptedException

getLocations

public String[] getLocations()
                      throws IOException,
                             InterruptedException

Specified by:

getLocations in class org.apache.hadoop.mapreduce.InputSplit

Throws:

IOException

InterruptedException

getSegmentInfoName

public String getSegmentInfoName()

getIndexPath

public org.apache.hadoop.fs.Path getIndexPath()

write

public void write(DataOutput out)
           throws IOException

Specified by:

write in interface org.apache.hadoop.io.Writable

Throws:

IOException

readFields

public void readFields(DataInput in)
                throws IOException

Specified by:

readFields in interface org.apache.hadoop.io.Writable

Throws:

IOException

getSegment

public org.apache.lucene.index.SegmentInfoPerCommit getSegment(org.apache.hadoop.conf.Configuration configuration)
                                                        throws IOException

Get the SegmentInfo of this InputSplit via the given Configuration

Parameters:

configuration - the configuration used to locate the index

Returns:

the segment info or throws exception if not found

Throws:

IOException - if an error occurs when accessing the directory