Package org.optaplanner.constraint.streams.drools.common

Class DroolsAbstractConstraintStream<Solution_,LHS_ extends org.optaplanner.constraint.streams.drools.common.AbstractLeftHandSide>

java.lang.Object

org.optaplanner.constraint.streams.common.AbstractConstraintStream<Solution_>

org.optaplanner.constraint.streams.drools.common.DroolsAbstractConstraintStream<Solution_,LHS_>

All Implemented Interfaces:

ConstraintStream

Direct Known Subclasses:

DroolsAbstractBiConstraintStream, DroolsAbstractQuadConstraintStream, DroolsAbstractTriConstraintStream, DroolsAbstractUniConstraintStream

public abstract class DroolsAbstractConstraintStream<Solution_,LHS_ extends org.optaplanner.constraint.streams.drools.common.AbstractLeftHandSide>
extends AbstractConstraintStream<Solution_>

Field Summary

Fields

Modifier and Type	Field	Description
protected final DroolsConstraintFactory<Solution_>	constraintFactory

Constructor Summary

Constructors

Constructor	Description
DroolsAbstractConstraintStream(DroolsConstraintFactory<Solution_> constraintFactory, RetrievalSemantics retrievalSemantics)

Method Summary

Modifier and Type	Method	Description
void	addChildStream(DroolsAbstractConstraintStream<Solution_,?> childStream)
protected Constraint	buildConstraint(String constraintPackage, String constraintName, Score<?> constraintWeight, ScoreImpactType impactType, Object justificationMapping, Object indictedObjectsMapping, RuleBuilder<Solution_> ruleBuilder)
abstract LHS_	createLeftHandSide()	Some constructs in the Drools executable model may not be reused between different rules.
Collection<DroolsAbstractConstraintStream<Solution_,?>>	getChildStreams()
DroolsConstraintFactory<Solution_>	getConstraintFactory()

Methods inherited from class org.optaplanner.constraint.streams.common.AbstractConstraintStream

buildConstraintWeightExtractor, buildConstraintWeightExtractor, getDefaultIndictedObjectsMapping, getDefaultJustificationMapping, getRetrievalSemantics

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.optaplanner.core.api.score.stream.ConstraintStream

impact, impact, penalize, penalize, penalizeConfigurable, penalizeConfigurable, reward, reward, rewardConfigurable, rewardConfigurable

Field Details

constraintFactory

protected final DroolsConstraintFactory<Solution_> constraintFactory

Constructor Details

DroolsAbstractConstraintStream

public DroolsAbstractConstraintStream(DroolsConstraintFactory<Solution_> constraintFactory,
 RetrievalSemantics retrievalSemantics)

Method Details

buildConstraint

protected Constraint buildConstraint(String constraintPackage,
 String constraintName,
 Score<?> constraintWeight,
 ScoreImpactType impactType,
 Object justificationMapping,
 Object indictedObjectsMapping,
 RuleBuilder<Solution_> ruleBuilder)

addChildStream

public void addChildStream(DroolsAbstractConstraintStream<Solution_,?> childStream)

getChildStreams

public Collection<DroolsAbstractConstraintStream<Solution_,?>> getChildStreams()

getConstraintFactory

public DroolsConstraintFactory<Solution_> getConstraintFactory()

Specified by:

getConstraintFactory in interface ConstraintStream

Specified by:

getConstraintFactory in class AbstractConstraintStream<Solution_>

createLeftHandSide

public abstract LHS_ createLeftHandSide()

Some constructs in the Drools executable model may not be reused between different rules. They are, among others, variable instances and beta indexes. Therefore an instance of AbstractLeftHandSide must never be used to create more than one rule. Therefore every constraint stream re-creates the entire chain of left hand sides every time a new rule is built. It is then left up to Drools to node-share everything it can.

Returns:

never null, different instance on every call