moa.recommender.rc.data.impl

Class MemRecommenderData

java.lang.Object

moa.recommender.rc.data.AbstractRecommenderData

moa.recommender.rc.data.impl.MemRecommenderData

All Implemented Interfaces:

Serializable, RecommenderData

public class MemRecommenderData
extends AbstractRecommenderData

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected class	MemRecommenderData.RatingIterator

Field Summary

Fields

Modifier and Type	Field and Description
protected Map<Integer,moa.recommender.rc.data.impl.MemRecommenderData.EntityStats>	itemsStats
protected double	maxRating
protected double	minRating
protected int	nItems
protected int	nRatings
protected int	nUsers
protected Map<Integer,Map<Integer,Double>>	ratingsItem
protected Map<Integer,Map<Integer,Double>>	ratingsUser
protected double	sumRatings
protected Map<Integer,moa.recommender.rc.data.impl.MemRecommenderData.EntityStats>	usersStats

Fields inherited from class moa.recommender.rc.data.AbstractRecommenderData

disableUpdates, updatables

Constructor Summary

Constructors

Constructor and Description
MemRecommenderData()

Method Summary

Methods

Modifier and Type	Method and Description
void	addItem(int itemID, List<Integer> ratingUsers, List<Double> ratings)
void	addUser(int userID, List<Integer> ratedItems, List<Double> ratings)
void	clear()
int	countRatingsItem(int itemID)
int	countRatingsUser(int userID)
double	getAvgRatingItem(int itemID)
double	getAvgRatingUser(int userID)
double	getGlobalMean()
Set<Integer>	getItems()
double	getMaxRating()
double	getMinRating()
int	getNumItems()
int	getNumRatings()
int	getNumUsers()
double	getRating(int userID, int itemID)
SparseVector	getRatingsItem(int itemID)
SparseVector	getRatingsUser(int userID)
Set<Integer>	getUsers()
boolean	itemExists(int itemID)
Iterator<Rating>	ratingIterator()
void	removeItem(int itemID)
void	removeRating(int userID, int itemID)
void	removeUser(int userID)
void	setRating(int userID, int itemID, double rating)
boolean	userExists(int userID)

Methods inherited from class moa.recommender.rc.data.AbstractRecommenderData

attachUpdatable, close, disableUpdates

Methods inherited from class java.lang.Object

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

Field Detail

ratingsUser

protected Map<Integer,Map<Integer,Double>> ratingsUser

ratingsItem

protected Map<Integer,Map<Integer,Double>> ratingsItem

usersStats

protected Map<Integer,moa.recommender.rc.data.impl.MemRecommenderData.EntityStats> usersStats

itemsStats

protected Map<Integer,moa.recommender.rc.data.impl.MemRecommenderData.EntityStats> itemsStats

nItems

protected int nItems

nUsers

protected int nUsers

sumRatings

protected double sumRatings

nRatings

protected int nRatings

minRating

protected double minRating

maxRating

protected double maxRating

Constructor Detail

MemRecommenderData

public MemRecommenderData()

Method Detail

addUser

public void addUser(int userID,
           List<Integer> ratedItems,
           List<Double> ratings)

Specified by:

addUser in interface RecommenderData

Overrides:

addUser in class AbstractRecommenderData

removeUser

public void removeUser(int userID)

Specified by:

removeUser in interface RecommenderData

Overrides:

removeUser in class AbstractRecommenderData

addItem

public void addItem(int itemID,
           List<Integer> ratingUsers,
           List<Double> ratings)

Specified by:

addItem in interface RecommenderData

Overrides:

addItem in class AbstractRecommenderData

removeItem

public void removeItem(int itemID)

Specified by:

removeItem in interface RecommenderData

Overrides:

removeItem in class AbstractRecommenderData

setRating

public void setRating(int userID,
             int itemID,
             double rating)

Specified by:

setRating in interface RecommenderData

Overrides:

setRating in class AbstractRecommenderData

removeRating

public void removeRating(int userID,
                int itemID)

Specified by:

removeRating in interface RecommenderData

Overrides:

removeRating in class AbstractRecommenderData

getRatingsUser

public SparseVector getRatingsUser(int userID)

getRating

public double getRating(int userID,
               int itemID)

getNumItems

public int getNumItems()

getNumUsers

public int getNumUsers()

getAvgRatingUser

public double getAvgRatingUser(int userID)

getAvgRatingItem

public double getAvgRatingItem(int itemID)

getMinRating

public double getMinRating()

getMaxRating

public double getMaxRating()

getUsers

public Set<Integer> getUsers()

getRatingsItem

public SparseVector getRatingsItem(int itemID)

getItems

public Set<Integer> getItems()

getGlobalMean

public double getGlobalMean()

countRatingsUser

public int countRatingsUser(int userID)

countRatingsItem

public int countRatingsItem(int itemID)

ratingIterator

public Iterator<Rating> ratingIterator()

getNumRatings

public int getNumRatings()

userExists

public boolean userExists(int userID)

itemExists

public boolean itemExists(int itemID)

clear

public void clear()

Specified by:

clear in interface RecommenderData

Overrides:

clear in class AbstractRecommenderData