it.cnr.isti.hpc.dexter.spot

Class SpotReader

java.lang.Object

it.cnr.isti.hpc.dexter.spot.SpotReader

All Implemented Interfaces:

Iterator<Spot>

public class SpotReader
extends Object
implements Iterator<Spot>

SpotReader class iterates over a list of spots given two files:

• a spotSrcTargetFile containing a list of spots extracted from the anchors in the wikipedia dump. The format of each line in the file is:
  spot source-id target-id
  where source-id is the integer id of the entity containing the anchor, while target-id is the target of the anchor. The file is lexicographically sorted by the spot, source-id and then target-id.
• a spotDocFreqFile containing the document frequency (how many articles contain the spot as pure text) for each spot (each line containing spot doc frequency ). The file is sorted by the spot.

The SpotReader merges the informations in the two files and provides an iterator over a list of Spot objects.

Author:

Diego Ceccarelli Created on Sep 22, 2013

See Also:

Spot

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SpotReader.SpotFrequency Contains the text of a spot and its document frequency in the collection.
static class	SpotReader.SpotFrequencyParser Parse a line containing the encoded version of a SpotFrequency object.
static class	SpotReader.SpotSrcTarget
static class	SpotReader.SpotSrcTargetParser

Constructor Summary

Constructors

Constructor and Description
SpotReader(String spotSrcTargetFile, String spotDocFreqFile)

Method Summary

Methods

Modifier and Type	Method and Description
void	addFilter(Filter<Spot> filter) Add a filter to the reader.
boolean	hasNext()
void	init()
Spot	next()
void	remove()

Methods inherited from class java.lang.Object

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

Constructor Detail

SpotReader

public SpotReader(String spotSrcTargetFile,
          String spotDocFreqFile)

Method Detail

addFilter

public void addFilter(Filter<Spot> filter)

Add a filter to the reader. The Iterator will return only Spot objects that are not filtered by the filters.

Parameters:

filter - - the filter to apply

See Also:

Filter

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<Spot>

init

public void init()

next

public Spot next()

Specified by:

next in interface Iterator<Spot>

remove

public void remove()

Specified by:

remove in interface Iterator<Spot>