Repository files navigation

⚠️ Since 1.4 MapStruct has support for using constructor arguments when instantiating mapping targets.This also works with Kotlin data classes.

Since mapstruct1.3.0.Beta2 it's possible to use builders for immutable classes.According to the documentation you can implement your custom builder provider logic. This project take advantage of this and provide a customBuilderProvider for kotlin data classes.

So instead of this (source)

data classPersonDto(varfirstName:String?,varlastName:String?,varphone:String?,varbirthdate:LocalDate?) {// Necessary for MapStructconstructor():this(null,null,null,null)}

We can do this

@KotlinBuilderdata classPersonDto(valfirstName:String,vallastName:String,valphone:String,valbirthdate:LocalDate)

With a mapper

@MapperinterfacePersonMapper {funmap(person:Person):PersonDto}

First apply kapt plugin

applyplugin:'kotlin-kapt'

Then add these to your project as dependency

api("com.github.pozo:mapstruct-kotlin:1.3.1.2")kapt("com.github.pozo:mapstruct-kotlin-processor:1.3.1.2")

Check out the directoryexample for a basic usage example.

For example in case of1.3.1.1 the first part1.3.1 is the mapstruct version number and the last digit1 reserved for future patches.

• mapstruct-kotlin-builder contains only theKotlinBuilder annotation
• mapstruct-kotlin-processor responsible for generating the builders for the kotlin data classes with the help of a customDefaultBuilderProvider
• example responsible for demonstrating this library usage

./gradlew -p example clean build

• Map with custom types are not working
• Look overkotlin-builder-annotation project and replace with class generating module (builder-processor)
• Writing tests
• Versioning and release process

Please see LICENSE file

Zoltan Polgar -pozo@gmx.com

Please do not hesitate to contact me if you have any further questions.