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OptaPlanner solves planning problems. This lightweight, embeddable planning engine implements powerful and scalable algorithms to optimize business resource scheduling and planning. This module contains the Drools implementation of Constraint streams.
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 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * 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
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
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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 org.drools.model.DSL;
import org.drools.model.Variable;
import org.drools.model.view.ViewItem;
import org.optaplanner.constraint.streams.common.inliner.JustificationsSupplier;
import org.optaplanner.core.api.function.ToIntTriFunction;
import org.optaplanner.core.api.function.ToLongTriFunction;
import org.optaplanner.core.api.function.TriFunction;

final class TriRuleContext extends AbstractRuleContext {

    private final Variable variableA;
    private final Variable variableB;
    private final Variable variableC;

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

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

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

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

    public  RuleBuilder newRuleBuilder() {
        return newRuleBuilder((ToIntTriFunction) (a, b, c) -> 1);
    }

}