edu.umd.cloud9.collection.trec

Class TrecDocumentInputFormatOld.TrecDocumentRecordReader

java.lang.Object

edu.umd.cloud9.collection.trec.TrecDocumentInputFormatOld.TrecDocumentRecordReader

All Implemented Interfaces:

org.apache.hadoop.mapred.RecordReader<org.apache.hadoop.io.LongWritable,TrecDocument>

Enclosing class:

TrecDocumentInputFormatOld

public static class TrecDocumentInputFormatOld.TrecDocumentRecordReader
extends Object
implements org.apache.hadoop.mapred.RecordReader<org.apache.hadoop.io.LongWritable,TrecDocument>

Hadoop RecordReader for reading TREC-formatted documents.

Constructor Summary

Constructors

Constructor and Description
TrecDocumentInputFormatOld.TrecDocumentRecordReader(org.apache.hadoop.mapred.FileSplit split, org.apache.hadoop.mapred.JobConf conf) Creates a TrecDocumentRecordReader.

Method Summary

Methods

Modifier and Type	Method and Description
void	close() Closes this InputSplit.
org.apache.hadoop.io.LongWritable	createKey() Creates an object for the key.
TrecDocument	createValue() Creates an object for the value.
long	getPos() Returns the current position in the input.
float	getProgress() Returns progress on how much input has been consumed.
boolean	next(org.apache.hadoop.io.LongWritable key, TrecDocument value) Reads the next key-value pair.

Methods inherited from class java.lang.Object

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

Constructor Detail

TrecDocumentInputFormatOld.TrecDocumentRecordReader

public TrecDocumentInputFormatOld.TrecDocumentRecordReader(org.apache.hadoop.mapred.FileSplit split,
                                                   org.apache.hadoop.mapred.JobConf conf)
                                                    throws IOException

Creates a TrecDocumentRecordReader.

Throws:

IOException

Method Detail

next

public boolean next(org.apache.hadoop.io.LongWritable key,
           TrecDocument value)
             throws IOException

Reads the next key-value pair.

Specified by:

next in interface org.apache.hadoop.mapred.RecordReader<org.apache.hadoop.io.LongWritable,TrecDocument>

Throws:

IOException

createKey

public org.apache.hadoop.io.LongWritable createKey()

Creates an object for the key.

Specified by:

createKey in interface org.apache.hadoop.mapred.RecordReader<org.apache.hadoop.io.LongWritable,TrecDocument>

createValue

public TrecDocument createValue()

Creates an object for the value.

Specified by:

createValue in interface org.apache.hadoop.mapred.RecordReader<org.apache.hadoop.io.LongWritable,TrecDocument>

getPos

public long getPos()
            throws IOException

Returns the current position in the input.

Specified by:

getPos in interface org.apache.hadoop.mapred.RecordReader<org.apache.hadoop.io.LongWritable,TrecDocument>

Throws:

IOException

close

public void close()
           throws IOException

Closes this InputSplit.

Specified by:

close in interface org.apache.hadoop.mapred.RecordReader<org.apache.hadoop.io.LongWritable,TrecDocument>

Throws:

IOException

getProgress

public float getProgress()
                  throws IOException

Returns progress on how much input has been consumed.

Specified by:

getProgress in interface org.apache.hadoop.mapred.RecordReader<org.apache.hadoop.io.LongWritable,TrecDocument>

Throws:

IOException