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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.bi;

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.uni.UniTuple;

final class JoinBiNode extends AbstractJoinNode, B, BiTuple, BiTupleImpl> {

    private final Function mappingA;
    private final int outputStoreSize;

    public JoinBiNode(Function mappingA, Function mappingB,
            int inputStoreIndexA, int inputStoreIndexB,
            TupleLifecycle> nextNodesTupleLifecycle,
            int outputStoreSize,
            Indexer, Map, BiTupleImpl>> indexerA,
            Indexer, Map, BiTupleImpl>> indexerB) {
        super(mappingB, inputStoreIndexA, inputStoreIndexB, nextNodesTupleLifecycle, indexerA, indexerB);
        this.mappingA = mappingA;
        this.outputStoreSize = outputStoreSize;
    }

    @Override
    protected IndexProperties createIndexPropertiesLeft(UniTuple leftTuple) {
        return mappingA.apply(leftTuple.getFactA());
    }

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

    @Override
    protected void updateOutTupleLeft(BiTupleImpl outTuple, UniTuple leftTuple) {
        outTuple.factA = leftTuple.getFactA();
    }

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

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

}