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

Class BooleanPreference

java.lang.Object

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

All Implemented Interfaces:

Serializable, Preference

public final class BooleanPreference
extends Object
implements Preference, Serializable

Encapsulates a simple boolean "preference" for an item whose value does not matter (is fixed at 1.0). This is appropriate in situations where users conceptually have only a general "yes" preference for items, rather than a spectrum of preference values.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
BooleanPreference(long userID, long itemID)

Method Summary

Methods

Modifier and Type	Method and Description
long	getItemID()
long	getUserID()
float	getValue()
void	setValue(float value) Sets the strength of the preference for this item
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

BooleanPreference

public BooleanPreference(long userID,
                 long itemID)

Method Detail

getUserID

public long getUserID()

Specified by:

getUserID in interface Preference

Returns:

ID of user who prefers the item

getItemID

public long getItemID()

Specified by:

getItemID in interface Preference

Returns:

item ID that is preferred

getValue

public float getValue()

Specified by:

getValue in interface Preference

Returns:

strength of the preference for that item. Zero should indicate "no preference either way"; positive values indicate preference and negative values indicate dislike

setValue

public void setValue(float value)

Description copied from interface: Preference

Sets the strength of the preference for this item

Specified by:

setValue in interface Preference

Parameters:

value - new preference

toString

public String toString()

Overrides:

toString in class Object