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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 examples which demonstrate how to use it in a normal Java application.

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/*
 * Copyright 2015 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed 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 under the License.
 */

package org.optaplanner.examples.investment.solver.move;

import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;

import org.optaplanner.core.impl.heuristic.move.AbstractMove;
import org.optaplanner.core.impl.score.director.ScoreDirector;
import org.optaplanner.examples.investment.domain.AssetClassAllocation;
import org.optaplanner.examples.investment.domain.InvestmentSolution;

public class InvestmentQuantityTransferMove extends AbstractMove {

    private final AssetClassAllocation fromAssetClassAllocation;
    private final AssetClassAllocation toAssetClassAllocation;
    private final long transferMillis;

    public InvestmentQuantityTransferMove(AssetClassAllocation fromAssetClassAllocation,
            AssetClassAllocation toAssetClassAllocation, long transferMillis) {
        this.fromAssetClassAllocation = fromAssetClassAllocation;
        this.toAssetClassAllocation = toAssetClassAllocation;
        this.transferMillis = transferMillis;
    }

    @Override
    public boolean isMoveDoable(ScoreDirector scoreDirector) {
        return true;
    }

    @Override
    public InvestmentQuantityTransferMove createUndoMove(ScoreDirector scoreDirector) {
        return new InvestmentQuantityTransferMove(toAssetClassAllocation, fromAssetClassAllocation, transferMillis);
    }

    @Override
    protected void doMoveOnGenuineVariables(ScoreDirector scoreDirector) {
        scoreDirector.beforeVariableChanged(fromAssetClassAllocation, "quantityMillis");
        fromAssetClassAllocation.setQuantityMillis(fromAssetClassAllocation.getQuantityMillis() - transferMillis);
        scoreDirector.afterVariableChanged(fromAssetClassAllocation, "quantityMillis");
        scoreDirector.beforeVariableChanged(toAssetClassAllocation, "quantityMillis");
        toAssetClassAllocation.setQuantityMillis(toAssetClassAllocation.getQuantityMillis() + transferMillis);
        scoreDirector.afterVariableChanged(toAssetClassAllocation, "quantityMillis");
    }

    @Override
    public InvestmentQuantityTransferMove rebase(ScoreDirector destinationScoreDirector) {
        return new InvestmentQuantityTransferMove(
                destinationScoreDirector.lookUpWorkingObject(fromAssetClassAllocation),
                destinationScoreDirector.lookUpWorkingObject(toAssetClassAllocation),
                transferMillis);
    }

    @Override
    public Collection getPlanningEntities() {
        return Arrays.asList(fromAssetClassAllocation, toAssetClassAllocation);
    }

    @Override
    public Collection getPlanningValues() {
        return Collections.emptyList();
    }

    @Override
    public String toString() {
        long fromQuantity = fromAssetClassAllocation.getQuantityMillis();
        long toQuantity = toAssetClassAllocation.getQuantityMillis();
        return "[" + fromAssetClassAllocation + " {" + fromQuantity + "->" + (fromQuantity - transferMillis) + "}, "
                + toAssetClassAllocation + " {" + toQuantity + "->" + (toQuantity + transferMillis) + "}]";
    }

}