OptaPlanner

Question

我一直在尝试在 Optaplanner 中针对与护士排班问题类似的问题实施自定义 Construction Heuristic。

一切似乎都被正确注释，并添加到 SolverConfiguration，但我不断收到此错误：

Exception in thread "main" java.lang.IllegalArgumentException: A planning entity is an instance of an entitySubclass (class java.lang.Integer) that is not configured as a planning entity.
If that class (Integer) (or superclass thereof) is not a entityClass ([class org.optaplanner.examples.nurserostering.domain.SkillRequirement, class org.optaplanner.examples.nurserostering.domain.ShiftAssignment]), check your Solution implementation's annotated methods.
If it is, check your solver configuration.
at org.optaplanner.core.impl.domain.solution.descriptor.SolutionDescriptor.findEntityDescriptorOrFail(SolutionDescriptor.java:398)
at org.optaplanner.core.impl.domain.solution.descriptor.SolutionDescriptor.findVariableDescriptorOrFail(SolutionDescriptor.java:443)
at org.optaplanner.core.impl.score.director.AbstractScoreDirector.beforeVariableChanged(AbstractScoreDirector.java:226)
at org.optaplanner.examples.nurserostering.domain.solver.CustomConstructionHeuristic.changeWorkingSolution   (CustomConstructionHeuristic.java:86)
at org.optaplanner.core.impl.phase.custom.DefaultCustomPhase.doStep(DefaultCustomPhase.java:89)
at org.optaplanner.core.impl.phase.custom.DefaultCustomPhase.solve(DefaultCustomPhase.java:71)
at org.optaplanner.core.impl.solver.DefaultSolver.runPhases(DefaultSolver.java:214)
at org.optaplanner.core.impl.solver.DefaultSolver.solve(DefaultSolver.java:176)
at org.optaplanner.examples.nurserostering.app.NurseRosterConsoleApp.main(NurseRosterConsoleApp.java:142)

我尝试使用这些参考来修复它：

OptaPlanner Xml configuration and entitySubclass is not configured as a planning entity error

https://groups.google.com/forum/#!topic/optaplanner-dev/wCdeSQhGdaQ

到目前为止没有任何效果。关于我如何解决这个问题的任何线索？

Answer 1

是的，该错误消息还不是 100% 用户友好，我会在 7.0 中修复它。

无论如何，它的意思是你的解决方案中有这样的东西 class:

 @PlanningEntityCollectionProperty
 public List<Object> getMyEntities() {
     List<Object> entities = new ArrayList<>();
     entities.add(Integer.valueOf(1));
     ...
     return entities;
 }

因此，您要向集合中添加一个整数，该集合应该只存在于实体之外（因此只能存在于 SkillRequirement 或 ShiftAssignment 的实例之外）。

PS：奇怪的是，SkillRequirement 是一个规划实体，您可能想在您的护士花名册变体中给它 class 一个更好的名字。

OptaPlanner - 规划实体是未配置为规划实体的 entitySubclass (class java.lang.Integer) 的实例。

OptaPlanner - A planning entity is an instance of an entitySubclass (class java.lang.Integer) that is not configured as a planning entity.