Access enum value inside a method of enum class in Kotlin

Question

I have enum class with method declared inside

enum class MyEnum {
    VAL1, VAL2, VAL3;

    fun myFunc(): Any{
         // Here I want to access selected value
         // VAL1 in my example
    }
}

I can call this method like this

MyEnum.VAL1.myFunc()

But is it possible inside myFunc to get the value method was called on? In my example it's VAL1.

You can use this? What's the context of referencing self? If it's to return some value based on "selected" value with a switch (when), then it's better to have a field in the enum and just return its value. — Pawel
– Pawel, Commented Jul 10, 2018 at 19:01

score 5 · Accepted Answer · 2018-07-11 05:59:20Z

5

You can use this and this.ordinal which returns the ordinal of this enumeration constant
Also if you do this:

fun myFunc(): Any{
    val array = MyEnum.values()
    println(array[this.ordinal])
    println(this)
    return array[this.ordinal]
}

and call MyEnum.VAL2.myFunc() you will see VAL2

edited Jul 11, 2018 at 5:59

answered Jul 10, 2018 at 19:04

user8959091

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Comments

Abner Escócio · Accepted Answer · 2018-07-10 19:37:38Z

1

Try as follow

enum class MyEnum {
    VAL1 {
        override fun myFunc() {
            //do something with VAL1 using this
        }
    },
    VAL2 {
        override fun myFunc() {
            //do something with VAL2 using this
        }
    },
    VAL3 {
        override fun myFunc() {
            //do something with VAL3 using this
        }
    };

    abstract fun myFunc()
}

edited Jul 10, 2018 at 19:37

answered Jul 10, 2018 at 19:32

Abner Escócio

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