如何使用Optaplanner仅对现有解决方案(有序数据集)进行评分，而不是寻找新的解决方案？

import org.optaplanner.core.api.solver.SolverFactory;
import org.optaplanner.core.api.solver.Solver;
import org.optaplanner.core.api.score.Score;
import org.optaplanner.core.api.score.buildin.hardmediumsoft.HardMediumSoftScore;
import org.optaplanner.examples.nurserostering.domain.NurseRosteringSolution;

public class ScoreExistingSolutionExample {
    public static void main(String[] args) {
        // 创建 SolverFactory
        SolverFactory<NurseRosteringSolution> solverFactory = SolverFactory.createFromXmlResource(
            "org/optaplanner/examples/nurserostering/solver/nurseRosteringSolverConfig.xml");

        // 创建 Solver
        Solver<NurseRosteringSolution> solver = solverFactory.buildSolver();

        // 假设你已经有一个现有的解决方案
        NurseRosteringSolution existingSolution = loadExistingSolution();

        // 对现有解决方案进行评分
        Score<HardMediumSoftScore> score = solver.calculateScore(existingSolution);

        // 输出评分结果
        System.out.println("Score: " + score);
    }

    private static NurseRosteringSolution loadExistingSolution() {
        // 这里需要实现加载现有解决方案的逻辑
        // 例如从数据库或文件中读取解决方案
        return new NurseRosteringSolution();
    }
}