JSR 303验证覆盖

Question

在以下情况下，如何覆盖电子邮件中对AuthorizedUser的验证：

public class Account {
    @Length(min = 1, max = 100, 
            message = "'Email' must be between 1 and 100 characters in length.")
    @NotNull(message = "'Email' must not be empty.")
    protected String email;

    @Length(min = 1, max = 50,
            message = "'Name' must be between 1 and 50 characters in length.")
    private String name;
}

public class AuthorizedUser extends Account {
    @Length(min = 1, max = 40,
            message = "'Field' must be between 1 and 50 characters in length.")
    private String field;
}

我知道我可以通过在AuthorizedUser上重写setter中的电子邮件地址来“破解”这个解决方案，方法如下：

@Override
public void setEmail(String email) {
   this.email = email;
   super.setEmail(" ");
}

感觉很脏..。这是否可以在不编写自定义验证器的情况下被覆盖？

我尝试将@Valid移到超类中的setter中，并将其留在被覆盖的字段中，但我仍然收到来自超类的关于它为空的消息。有没有更懒惰的方法呢？

Answer 1

由于约束是通过继承聚合的，因此最好的解决方案可能是将继承层次结构更改为如下所示：

public class BasicAccount {
  protected String email;

  @Length(min = 1, max = 50,
          message = "'Name' must be between 1 and 50 characters in length.")
  private String name;
}

public class EmailValidatedAccount extends BasicAccount {
  @Length(min = 1, max = 100, 
          message = "'Email' must be between 1 and 100 characters in length.")
  @NotNull(message = "'Email' must not be empty.")
  @Override
  public String getEmail() {
    return email;
  }
}

public class AuthorizedUser extends BasicAccount {
  @Length(min = 1, max = 40,
          message = "'Field' must be between 1 and 50 characters in length.")
  private String field;
}