How can you effectively map a complex DTO that includes nested collections of objects to an entity in Spring Boot using the MapStruct library? I can map simple object, but what if I need to map this nested elements from collection?
I am using Kotlin and Springboot.
Some best practices?
you can use decorator on your mapper where you can call generated map function by MapStruct and extend result in your decorator.
Example:
Firstly create an abstract class:
@DecoratedWith(NameOfYourDecorator::class) abstract class NameOfYourMapperDecorated : YourMapper
Create decorator and map list from DTO to list of your entity:
open class BatchMapperDecorator : BatchMapperDecorated() {
// inject your mapper
private var mapperProperty: YourMapper =
Mappers.getMapper(YourMapper::class.java)
override fun mapMethod(source: DTO): YourEntity
{
val result = mapperProperty.mapMethod(source)
result.collection = source.collection.map {
… map logic …
}.toList()
return result
}