Hibernate进行多层次的混合继承策略层次结构

Question

我有以下类的结构：

我想生成与休眠以下三个表：

• PlanItem：所有它的属性
• 任务：与所有的属性和它的子属性
• 阶段：其所有在进贡

我试图混合inheritancetypes，但它没有工作：

@Entity 
@Inheritance(strategy = InheritanceType.JOINED) 
public abstract class PlanItem {...} 

@Entity 
@Inheritance(strategy = InheritanceType.SINGLE_TABLE) 
public class Stage extends PlanItem {...} 

@Entity 
@Inheritance(strategy = InheritanceType.SINGLE_TABLE) 
public class Task extends PlanItem {...} 

@Entity 
public class HumanTask extends Task {...} 

@Entity 
public class ProcessTask extends Task {...} 

@Entity 
public class CaseTask extends Task {...} 

我已经与辅助表试验，得到了或多或少的期望的结果：

@Entity 
@Inheritance(strategy = InheritanceType.SINGLE_TABLE) 
public abstract class PlanItem {...} 

@Entity 
@SecondaryTable(name = "Stage") 
public class Stage extends PlanItem {...} 

@Entity 
@SecondaryTable(name = "Task") 
public class Task extends PlanItem {...} 

@Entity 
@SecondaryTable(name = "Task") 
public class HumanTask extends Task {...} 

@Entity 
@SecondaryTable(name = "Task") 
public class ProcessTask extends Task {...} 

@Entity 
@SecondaryTable(name = "Task") 
public class CaseTask extends Task {...} 

但我想知道是否有更优雅和简单的解决方案？

Answer 1

这是目前不可能的，看到following issue了解更多信息。我认为你使用辅助表的“黑客行为”目前是你能得到的最好的。