Java 动态替换嵌套对象的字段值

我正在尝试为我的

scala

应用程序编写集成测试（使用

akka http

）。我遇到了一个问题，我找不到解决办法

我的案例分类如下：

case class Employee(id:Long, name:String, departmentId:Long, createdDate:Timestamp) extends BaseEntity
case class EmployeeContainer(employee:Employee, department:Department)  extends BaseEntity

我有一个这样的方法

trait BaseTrait[E<:BaseEntity, C <: BaseEntity]{
    def getById(id:Long): Future[List[C]] = {
       //query from db and return result.
    }

    def save(obj:E) = {
      //set the createDate field to the current timestamp
      //insert into database
    }

}

---

trait-BaseTrait[E您可能需要为of使用一些。您的主要问题是您直接调用数据库：
val-emp-Employee）{
覆盖def getById（id:Long）={
为了{
瓦伦普
class MyDao extends BaseTrait[Employee, EmployeeContainer] {
  override def getById(id:Long) = {
      for {
      val emp <- getFromDb(id)
      val dept <- DeptDao.getFromDb(emp.departmentId)
      val container = EmployeeContainer(emp,dept)
      } yield(container)
   }
}

    class MyDao extends BaseTrait[Employee, EmployeeContainer](val dbCall: Long => Employee) {
  override def getById(id:Long) = {
      for {
      val emp <- dbCall(id)
      val dept <- DeptDao.getFromDb(emp.departmentId)
      val container = EmployeeContainer(emp,dept)
      } yield(container)
   }
   }