Override getter for Kotlin data class

Question

Given the following Kotlin class:

data class Test(val value: Int)

How would I override the Int getter so that it returns 0 if

Answer 1

This seems to be one (among other) annoying drawbacks of Kotlin.

It seems that the only reasonable solution, which completely keeps backward compatibility of the class is to convert it into a regular class (not a "data" class), and implement by hand (with the aid of the IDE) the methods: hashCode(), equals(), toString(), copy() and componentN()

class Data3(i: Int)
{
    var i: Int = i

    override fun equals(other: Any?): Boolean
    {
        if (this === other) return true
        if (other?.javaClass != javaClass) return false

        other as Data3

        if (i != other.i) return false

        return true
    }

    override fun hashCode(): Int
    {
        return i
    }

    override fun toString(): String
    {
        return "Data3(i=$i)"
    }

    fun component1():Int = i

    fun copy(i: Int = this.i): Data3
    {
        return Data3(i)
    }

}