MapStruct
Module allows you to integrate the MapStruct library to convert classes between each other.
Dependency¶
Dependency build.gradle:
MapStruct in Kotlin works with kapt, so you are required to configure kapt plugin build.gradle.kts:
``groovy
plugins {
kotlin("kapt") version ("1.9.10")
}
The latest working version for `kapt` + `ksp` is `1.9.10-1.0.13`, in later versions of KSP the compatibility between the two tools is broken at the Gradle Plugin level.
You need to allow the output of [kapt](https://kotlinlang.org/docs/kapt.html) to be used as input for [KSP](https://kotlinlang.org/docs/ksp-overview.html) `build.gradle.kts`:
```groovy
ksp {
allowSourcesFromOtherPlugins = true
}
tasks.withType<KspTask> {
dependsOn(tasks.named("kaptKotlin").get())
tasks.named("kaptGenerateStubsKotlin").get()
}
Successful building of the application may be only on second try, this is a KSP behavior.
Dependency build.gradle.kts:
Usage¶
The creation of the transducers themselves falls to the MapStruct library, Kora in this case just provides the classes created by the library as dependencies in the dependency container.
@KoraApp
public interface Application {
public enum CarType {TYPE1, TYPE2}
public record Car(String make, int numberOfSeats, CarType type) { }
public record CarTO(String make, int seatCount, String type) { }
@Mapper
public interface CarMapper {
@Mapping(source = "numberOfSeats", target = "seatCount")
CarTO map(Car car);
}
default SomeService someService(CarMapper carMapper) {
return new SomeService(carMapper);
}
}
@KoraApp
interface Application {
enum class CarType { TYPE1, TYPE2 }
data class Car(val make: String, val numberOfSeats: Int, val type: CarType)
data class CarTO(val make: String, val seatCount: Int, val type: String)
@Mapper
interface CarMapper {
@Mapping(source = "numberOfSeats", target = "seatCount")
fun map(car: Car): CarTO
}
fun someService(carMapper: CarMapper): SomeService {
return SomeService(carMapper)
}
}