org.lenskit.basic

Class FallbackResult

java.lang.Object

org.lenskit.basic.FallbackResult

All Implemented Interfaces:

Result

public class FallbackResult
extends Object
implements Result

Result from a FallbackItemScorer.

Method Summary

Modifier and Type	Method and Description
<T extends Result> T	as(Class<T> type) Convert this result to another type.
boolean	equals(Object o)
long	getId() Get the ID for the result.
Result	getInnerResult() Get the result from the scorer that produced this score.
double	getScore() Get the score (value) associated with this result.
int	hashCode()
boolean	hasScore() Query whether the result has a score.
boolean	isFromPrimary() Query whether this result came from the primary or the baseline item scorer.

Methods inherited from class java.lang.Object

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

Method Detail

getId

public long getId()

Description copied from interface: Result

Get the ID for the result.

Specified by:

getId in interface Result

Returns:

The user or item ID for this result.

getScore

public double getScore()

Description copied from interface: Result

Get the score (value) associated with this result.

Specified by:

getScore in interface Result

Returns:

The score associated with this entry (or Double.NaN if the result does not have a score).

hasScore

public boolean hasScore()

Description copied from interface: Result

Query whether the result has a score. This is equivalent to testing the return value of Result.getScore() with Double.isNaN(double), but may make the resulting code more readable.

Specified by:

hasScore in interface Result

Returns:

true if the result has a score.

as

@Nullable
public <T extends Result> T as(@Nonnull
                                          Class<T> type)

Convert this result to another type. If the type is not a superclass of FallbackResult, then this method delegates to the inner result.

Specified by:

as in interface Result

Parameters:

type - The desired result type.

T - The target result type.

Returns:

The converted type, or null if the result cannot be converted.

isFromPrimary

public boolean isFromPrimary()

Query whether this result came from the primary or the baseline item scorer.

Returns:

true if the result came from the primary item scorer.

getInnerResult

public Result getInnerResult()

Get the result from the scorer that produced this score.

Returns:

The inner result that produced the score.

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object