Reusing Types from DataWeave Modules

To reuse types declared in other DataWeave modules, use the import directive:

DataWeave Module (dw/Weather.dwl):

%dw 2.0
type Weather = "cloudy" | "sunny" | "rainy" | "stormy"
type DetailedWeather = {temperature: Number, weather: Weather}

You can use those imported types as any other type in DataWeave, as constraints for variables and functions or for pattern matching and checking types at runtime:

DataWeave Script:

%dw 2.0
output json
import * from dw::Weather


fun weatherMessage(todayWeather: Weather) =
    "The weather for today is: " ++ todayWeather
var worstPossibleWeather: DetailedWeather = {temperature: -10, weather: "stormy"}
---
{
    a: weatherMessage("sunny"),
    b: worstPossibleWeather.weather is Weather
}

Reusing Types from DataWeave Modules

See Also