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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 implementation of Constraint streams (Bavet).

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package org.optaplanner.constraint.streams.bavet.quad;

import java.util.Map;
import java.util.function.Function;

import org.optaplanner.constraint.streams.bavet.common.AbstractJoinNode;
import org.optaplanner.constraint.streams.bavet.common.TupleLifecycle;
import org.optaplanner.constraint.streams.bavet.common.index.IndexProperties;
import org.optaplanner.constraint.streams.bavet.common.index.Indexer;
import org.optaplanner.constraint.streams.bavet.tri.TriTuple;
import org.optaplanner.constraint.streams.bavet.uni.UniTuple;
import org.optaplanner.core.api.function.TriFunction;

final class JoinQuadNode
        extends AbstractJoinNode, D, QuadTuple, QuadTupleImpl> {

    private final TriFunction mappingABC;
    private final int outputStoreSize;

    public JoinQuadNode(TriFunction mappingABC, Function mappingD,
            int inputStoreIndexAB, int inputStoreIndexC,
            TupleLifecycle> nextNodesTupleLifecycle,
            int outputStoreSize,
            Indexer, Map, QuadTupleImpl>> indexerABC,
            Indexer, Map, QuadTupleImpl>> indexerD) {
        super(mappingD, inputStoreIndexAB, inputStoreIndexC, nextNodesTupleLifecycle, indexerABC, indexerD);
        this.mappingABC = mappingABC;
        this.outputStoreSize = outputStoreSize;
    }

    @Override
    protected IndexProperties createIndexPropertiesLeft(TriTuple leftTuple) {
        return mappingABC.apply(leftTuple.getFactA(), leftTuple.getFactB(), leftTuple.getFactC());
    }

    @Override
    protected void updateOutTupleLeft(QuadTupleImpl outTuple, TriTuple leftTuple) {
        outTuple.factA = leftTuple.getFactA();
        outTuple.factB = leftTuple.getFactB();
        outTuple.factC = leftTuple.getFactC();
    }

    @Override
    protected void updateOutTupleRight(QuadTupleImpl outTuple, UniTuple rightTuple) {
        outTuple.factD = rightTuple.getFactA();
    }

    @Override
    protected QuadTupleImpl createOutTuple(TriTuple leftTuple, UniTuple rightTuple) {
        return new QuadTupleImpl<>(leftTuple.getFactA(), leftTuple.getFactB(), leftTuple.getFactC(), rightTuple.getFactA(),
                outputStoreSize);
    }

    @Override
    public String toString() {
        return "JoinQuadNode";
    }

}