能否同时设置并使用ConstraintProvider与ScoreCalculator？解决方案求助

在OptaPlanner中同时配置ConstraintProvider和EasyScoreCalculator时抛出异常，代码如下：

ScoreDirectorFactoryConfig scoreDirectorFactoryConfig = new ScoreDirectorFactoryConfig();
scoreDirectorFactoryConfig.setConstraintProviderClass(VehicleRoutingConstraintProvider.class);
scoreDirectorFactoryConfig.setInitializingScoreTrend("ONLY_DOWN");
scoreDirectorFactoryConfig.setEasyScoreCalculatorClass(VRPScoreCalculator.class);
solverConfig.setScoreDirectorFactoryConfig(scoreDirectorFactoryConfig);

异常核心信息：

java.lang.IllegalArgumentException: The scoreDirectorFactory cannot have an easyScoreCalculatorClass and a constraintProviderClass together.

解决方案 #

OptaPlanner中这两种评分实现方式是互斥的，只能选择其一，以下是两种可行处理方式：

• 将ScoreCalculator逻辑迁移到ConstraintProvider（推荐）
  ConstraintProvider基于ConstraintStream API，是OptaPlanner官方推荐的现代评分方案，支持增量计算，性能远优于全量计算的EasyScoreCalculator。把VRPScoreCalculator中的所有评分规则，用ConstraintStream语法重写到VehicleRoutingConstraintProvider里，之后仅保留ConstraintProvider的配置即可：

  ScoreDirectorFactoryConfig scoreDirectorFactoryConfig = new ScoreDirectorFactoryConfig();
  scoreDirectorFactoryConfig.setConstraintProviderClass(VehicleRoutingConstraintProvider.class);
  scoreDirectorFactoryConfig.setInitializingScoreTrend("ONLY_DOWN");
  solverConfig.setScoreDirectorFactoryConfig(scoreDirectorFactoryConfig);
  

• 保留ScoreCalculator，移除ConstraintProvider配置
  如果暂时无法重构评分逻辑，可以移除setConstraintProviderClass的调用，仅保留EasyScoreCalculator的配置。但注意这种方式在求解大规模问题时，评分计算性能会显著下降：

  ScoreDirectorFactoryConfig scoreDirectorFactoryConfig = new ScoreDirectorFactoryConfig();
  scoreDirectorFactoryConfig.setInitializingScoreTrend("ONLY_DOWN");
  scoreDirectorFactoryConfig.setEasyScoreCalculatorClass(VRPScoreCalculator.class);
  solverConfig.setScoreDirectorFactoryConfig(scoreDirectorFactoryConfig);
  

内容的提问来源于stack exchange，提问作者Vasavi Bodala