Hibernate進行多層次的混合繼承策略層次結構

Question

我有以下類的結構：

我想生成與休眠以下三個表：

• PlanItem：所有它的屬性
• 任務：與所有的屬性和它的子屬性
• 階段：其所有在進貢

我試圖混合inheritancetypes，但它沒有工作：

@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 {...} 

我已經與輔助表試驗，得到了或多或少的期望的結果：

@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優雅和簡單的解決方案？

Answer 1

這是目前不可能的，看到following issue瞭解更多信息。我認爲你使用輔助表的「黑客行爲」目前是你能得到的最好的。