Kotlin中的枚举注释类型

Question

在Java中，我可以这样定义枚举注释类型（来自here）

// Constants
public static final String WINTER = "Winter";
public static final String SPRING = "Spring";
public static final String SUMMER = "Summer";
public static final String FALL = "Fall";

// Declare the @ StringDef for these constants:
@StringDef({WINTER, SPRING, SUMMER, FALL})
@Retention(RetentionPolicy.SOURCE)
public @interface Season {}

此代码的Kotlin版本是什么？

使用此工具时出现问题（使用IDE直接转换）

// Constants
private const val WINTER = "Winter"
private const val SPRING = "Spring"
private const val SUMMER = "Summer"
private const val FALL = "Fall"

// Declare the @ StringDef for these constants:
@StringDef(WINTER, SPRING, SUMMER, FALL)
@Retention(AnnotationRetention.SOURCE)
annotation class Season

因为我无法访问例如Season.WINTER

Answer 1

在Kotlin中，最好使用enum class。在Kotlin中转换@IntDef和@StringDef的用法时，我遇到很多问题。

enum class Season constructor(val value: String) {
  WINTER("Winter"),
  SPRING("Spring"),
  SUMMER("Summer"),
  FALL("Fall");

  override fun toString(): String = value
}