org.optaplanner.constraint.streams.drools.common.BiRuleContext Maven / Gradle / Ivy

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 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
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 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
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package org.optaplanner.constraint.streams.drools.common;

import static org.optaplanner.constraint.streams.common.inliner.JustificationsSupplier.of;

import java.math.BigDecimal;
import java.util.Objects;
import java.util.function.BiFunction;
import java.util.function.ToIntBiFunction;
import java.util.function.ToLongBiFunction;

import org.drools.model.DSL;
import org.drools.model.Variable;
import org.drools.model.view.ViewItem;
import org.optaplanner.constraint.streams.common.inliner.JustificationsSupplier;

final class BiRuleContext extends AbstractRuleContext {

    private final Variable variableA;
    private final Variable variableB;

    public BiRuleContext(Variable variableA, Variable variableB, ViewItem... viewItems) {
        super(viewItems);
        this.variableA = Objects.requireNonNull(variableA);
        this.variableB = Objects.requireNonNull(variableB);
    }

    public  RuleBuilder newRuleBuilder(ToIntBiFunction matchWeigher) {
        ConsequenceBuilder consequenceBuilder =
                (constraint, scoreImpacterGlobal) -> DSL.on(scoreImpacterGlobal, variableA, variableB)
                        .execute((drools, scoreImpacter, a, b) -> {
                            JustificationsSupplier justificationsSupplier =
                                    scoreImpacter.getContext().isConstraintMatchEnabled()
                                            ? of(constraint, constraint.getJustificationMapping(),
                                                    constraint.getIndictedObjectsMapping(), a, b)
                                            : null;
                            runConsequence(constraint, drools, scoreImpacter, matchWeigher.applyAsInt(a, b),
                                    justificationsSupplier);
                        });
        return assemble(consequenceBuilder);
    }

    public  RuleBuilder newRuleBuilder(ToLongBiFunction matchWeigher) {
        ConsequenceBuilder consequenceBuilder =
                (constraint, scoreImpacterGlobal) -> DSL.on(scoreImpacterGlobal, variableA, variableB)
                        .execute((drools, scoreImpacter, a, b) -> {
                            JustificationsSupplier justificationsSupplier =
                                    scoreImpacter.getContext().isConstraintMatchEnabled()
                                            ? of(constraint, constraint.getJustificationMapping(),
                                                    constraint.getIndictedObjectsMapping(), a, b)
                                            : null;
                            runConsequence(constraint, drools, scoreImpacter, matchWeigher.applyAsLong(a, b),
                                    justificationsSupplier);
                        });
        return assemble(consequenceBuilder);
    }

    public  RuleBuilder newRuleBuilder(BiFunction matchWeigher) {
        ConsequenceBuilder consequenceBuilder =
                (constraint, scoreImpacterGlobal) -> DSL.on(scoreImpacterGlobal, variableA, variableB)
                        .execute((drools, scoreImpacter, a, b) -> {
                            JustificationsSupplier justificationsSupplier =
                                    scoreImpacter.getContext().isConstraintMatchEnabled()
                                            ? of(constraint, constraint.getJustificationMapping(),
                                                    constraint.getIndictedObjectsMapping(), a, b)
                                            : null;
                            runConsequence(constraint, drools, scoreImpacter, matchWeigher.apply(a, b),
                                    justificationsSupplier);
                        });
        return assemble(consequenceBuilder);
    }

}