FieldTypeAdapter

An adapter interface for converting between different type representations of a field value.

This interface enables type conversion between:

• V: The stored value type in the form data

• S: The validation target type (what validators operate on)

• U: The input/display type (what the UI components work with)

This is useful when you need to validate or display a field value in a different format than how it's stored. For example, storing an integer but displaying it as a string in a text field.

Usage:

class IntStringAdapter : FieldTypeAdapter<Int, String, String> {
    override fun toValidationTarget(value: Int): String = value.toString()
    override fun toInput(value: Int): String = value.toString()
    override fun fromInput(value: String, current: Int): Int = value.toIntOrNull() ?: current
}

Parameters

Inheritors