org.apache.mahout.cf.taste.example.grouplens

Class GroupLensDataModel

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.grouplens.GroupLensDataModel

All Implemented Interfaces:

Serializable, Refreshable, DataModel

public final class GroupLensDataModel
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
GroupLensDataModel()
GroupLensDataModel(File ratingsFile)

Method Summary

Methods

Modifier and Type	Method and Description
static File	readResourceToTempFile(String resourceName)
String	toString()

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

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

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

GroupLensDataModel

public GroupLensDataModel()
                   throws IOException

Throws:

IOException

GroupLensDataModel

public GroupLensDataModel(File ratingsFile)
                   throws IOException

Parameters:

ratingsFile - GroupLens ratings.dat file in its native format

Throws:

IOException - if an error occurs while reading or writing files

Method Detail

readResourceToTempFile

public static File readResourceToTempFile(String resourceName)
                                   throws IOException

Throws:

IOException

toString

public String toString()

Overrides:

toString in class FileDataModel