Question

在 > someclass 中,有 (仅举一个最起码的例子,见下文),能否通过覆盖一个的 ,在 > Someothers class 中,覆盖一个 ?



@MappedSuperClass
public abstract class SomeClass {

@Column(name = "NAME", length = 255, unique = false, nullable = true)
@Pattern(regex = "([a-zA-Z0-9]+_)*([a-zA-Z0-9]+)")
        private String name;
    …
}



@AttributeOverride(name = "name", column = @Column(name = "NAME", length = 20, unique = false, nullable = false))
public class SomeOtherClass extends SomeClass {

    ….

}


或者,是否有其他办法为继承的班级定义新的pater ?

Answer 1

无法做到这一点。 @Attritte Override 和 @pater 注释不是同一规格的一部分。

是JPA规格的一部分,允许您推翻实体子类中财产的列定义。

是豆类验证(JSR 303)规格的一部分, 允许您指定一个与附加说明的成员相对应的正则表达式。您无法推翻@ patternatation, 但您可以在子类中累积应用新模式, 前提是您在说明您的方法, 而不是字段。

见时间：2012-05-23 15:55:27

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