Package org.optaplanner.core.api.score

Interface ScoreExplanation<Solution_,Score_ extends Score<Score_>>

Type Parameters:

Solution_ - the solution type, the class with the PlanningSolution annotation

Score_ - the actual score type

All Known Implementing Classes:

DefaultScoreExplanation

public interface ScoreExplanation<Solution_,Score_ extends Score<Score_>>

Build by SolutionManager.explain(Object) to hold ConstraintMatchTotals and Indictments necessary to explain the quality of a particular Score.

Method Summary

Modifier and Type	Method	Description
Map<String,ConstraintMatchTotal<Score_>>	getConstraintMatchTotalMap()	Explains the Score of getScore() by splitting it up per Constraint.
Map<Object,Indictment<Score_>>	getIndictmentMap()	Explains the impact of each planning entity or problem fact on the Score.
List<ConstraintJustification>	getJustificationList()	Explains the Score of getScore() for all constraints.
default <ConstraintJustification_ extends ConstraintJustification> List<ConstraintJustification_>	getJustificationList(Class<? extends ConstraintJustification_> constraintJustificationClass)	Explains the Score of getScore() for all constraints justified with a given ConstraintJustification type.
Score_	getScore()	Return the Score being explained.
Solution_	getSolution()	Retrieve the PlanningSolution that the score being explained comes from.
String	getSummary()	Returns a diagnostic text that explains the solution through the ConstraintMatch API to identify which constraints or planning entities cause that score quality.

Method Details

getSolution

Solution_ getSolution()

Retrieve the PlanningSolution that the score being explained comes from.

Returns:

never null

getScore

Score_ getScore()

Return the Score being explained. If the specific Score type used by the PlanningSolution is required, call getSolution() and retrieve it from there.

Returns:

never null

getSummary

String getSummary()

Returns a diagnostic text that explains the solution through the ConstraintMatch API to identify which constraints or planning entities cause that score quality.

In case of an infeasible solution, this can help diagnose the cause of that.

Returns:

never null

getConstraintMatchTotalMap

Map<String,ConstraintMatchTotal<Score_>> getConstraintMatchTotalMap()

Explains the Score of getScore() by splitting it up per Constraint.

The sum of ConstraintMatchTotal.getScore() equals getScore().

Returns:

never null, the key is the constraintId (to create one, use ConstraintMatchTotal.composeConstraintId(String, String)).

See Also:

• getIndictmentMap()

getJustificationList

List<ConstraintJustification> getJustificationList()

Explains the Score of getScore() for all constraints. The return value of this method is determined by several factors:

• With Constraint Streams, the user has an option to provide a custom justification mapping, implementing ConstraintJustification. If provided, every ConstraintMatch of such constraint will be associated with this custom justification class. Every constraint not associated with a custom justification class will be associated with DefaultConstraintJustification.
• With ConstraintMatchAwareIncrementalScoreCalculator, every ConstraintMatch will be associated with the justification class that the user created it with.
• With score DRL, every ConstraintMatch will be associated with DefaultConstraintJustification.

Returns:

never null, all constraint matches

See Also:

• getIndictmentMap()

getJustificationList

default <ConstraintJustification_ extends ConstraintJustification>
List<ConstraintJustification_> getJustificationList(Class<? extends ConstraintJustification_> constraintJustificationClass)

Explains the Score of getScore() for all constraints justified with a given ConstraintJustification type. Otherwise, as defined by getJustificationList().

Parameters:

constraintJustificationClass - never null

Returns:

never null, all constraint matches associated with the given justification class

See Also:

• getIndictmentMap()

getIndictmentMap

Map<Object,Indictment<Score_>> getIndictmentMap()

Explains the impact of each planning entity or problem fact on the Score. An Indictment is basically the inverse of a ConstraintMatchTotal: it is a Score total for any of the indicted objects.

The sum of ConstraintMatchTotal.getScore() differs from getScore() because each ConstraintMatch.getScore() is counted for each of the indicted objects.

Returns:

never null, the key is a problem fact or a planning entity

See Also:

• getConstraintMatchTotalMap()