格瑞尔:格姆和比特集?

我在里面什么也没看到 official documentation 关于不受支持的持久性数据类型,所以我假设Groovy语言中可用的类型应该被处理。但是,对于以下域类:

class DocGroupPermissions {

   Workgroup workgroup
   Document document;
   BitSet permissions = new BitSet(2)

   void setPermissions(boolean canRead, boolean canWrite) {
       setReadPermissions(canRead)
       setWritePermissions(canWrite)
   }

   void setReadPermissions(boolean canRead) {
      permissions.set(0,canRead)
   }
   void setWritePermissions(boolean canWrite) {
      permissions.set(1,canWrite)
   }

   boolean getReadPermissions() {
      return permissions.get(0)
   }

   boolean getWritePermissions() {
      return permissions.get(1)
   }


   static belongsTo = [workgroup:Workgroup, document:Document]

   static constraints = {
      workgroup(nullable:false, blank:false)
      document(nullable:false, blank:false)
   }
}

我得到:

2009-11-15 16:46:12298[main]ERROR context.ContextLoader-上下文初始化失败 org.springframework.beans.factory.BeanCreationException:创建名为“messageSource”的bean时出错:初始化bean失败;嵌套异常是org.springframework.beans.factory.BeanCreationException:创建名为“transactionManager”的bean时出错:设置bean属性“sessionFactory”时无法解析对bean“sessionFactory”的引用;嵌套异常是org.springframework.beans.factory.BeanCreationException:创建名为“sessionFactory”的bean时出错:调用init方法失败;嵌套异常为org.hibernate.MappingException:表doc_group_permissions中的关联引用了未映射的类:java.util.BitSet

以前有人碰到过这个吗?