org.apache.mahout.cf.taste.example.jester

Class JesterDataModel

java.lang.Object

org.apache.mahout.cf.taste.impl.model.AbstractDataModel

org.apache.mahout.cf.taste.impl.model.file.FileDataModel

org.apache.mahout.cf.taste.example.jester.JesterDataModel

All Implemented Interfaces:

Serializable, Refreshable, DataModel

public final class JesterDataModel
extends FileDataModel

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.mahout.cf.taste.impl.model.file.FileDataModel

DEFAULT_MIN_RELOAD_INTERVAL_MS

Constructor Summary

Constructors

Constructor and Description
JesterDataModel()
JesterDataModel(File ratingsFile)

Method Summary

Methods

Modifier and Type	Method and Description
protected DataModel	buildModel()
protected void	processLine(String line, FastByIDMap<?> rawData, FastByIDMap<FastByIDMap<Long>> timestamps, boolean fromPriorData)
void	reload()

Methods inherited from class org.apache.mahout.cf.taste.impl.model.file.FileDataModel

determineDelimiter, getDataFile, getDelimiter, getItemIDs, getItemIDsFromUser, getMaxPreference, getMinPreference, getNumItems, getNumUsers, getNumUsersWithPreferenceFor, getNumUsersWithPreferenceFor, getPreferencesForItem, getPreferencesFromUser, getPreferenceTime, getPreferenceValue, getUserIDs, hasPreferenceValues, processFile, processFileWithoutID, processLineWithoutID, readItemIDFromString, readTimestampFromString, readUserIDFromString, refresh, removePreference, setPreference, toString

Methods inherited from class org.apache.mahout.cf.taste.impl.model.AbstractDataModel

setMaxPreference, setMinPreference

Methods inherited from class java.lang.Object

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

Constructor Detail

JesterDataModel

public JesterDataModel()
                throws IOException

Throws:

IOException

JesterDataModel

public JesterDataModel(File ratingsFile)
                throws IOException

Parameters:

ratingsFile - Jester ratings file in CSV format

Throws:

IOException - if an error occurs while reading or writing files

Method Detail

reload

public void reload()

Overrides:

reload in class FileDataModel

buildModel

protected DataModel buildModel()
                        throws IOException

Overrides:

buildModel in class FileDataModel

Throws:

IOException

processLine

protected void processLine(String line,
               FastByIDMap<?> rawData,
               FastByIDMap<FastByIDMap<Long>> timestamps,
               boolean fromPriorData)

Overrides:

processLine in class FileDataModel