Schema Types

The following types are available in the kayan { schema { ... } } DSL:

Type	Kotlin type	Description
string	String	Plain text value
boolean	Boolean	true or false
int	Int	32-bit integer
long	Long	64-bit integer
double	Double	Floating-point number
stringMap	Map<String, String>	Key-value pairs
stringList	List<String>	List of strings
stringListMap	Map<String, List<String>>	Map of string to list of strings
enumValue	Generated enum	Normalized enum generation
custom	Consumer-defined	Adapter-based custom types

Modifiers

Use nullable = true to allow explicit null in config files. Use required = true when the final resolved value must always exist.

Custom types

For types that don’t fit the built-in kinds, use the custom declaration with an adapter:

custom(
    jsonKey = "launch_date",
    propertyName = "LAUNCH_DATE",
    rawKind = io.kayan.ConfigValueKind.STRING,
    adapter = "sample.buildlogic.LaunchDateAdapter",
    required = true,
)

The adapter class must implement the conversion from the raw config value kind to your target type.