Mapstruct example for Kotlin with Gradle Kotlin DSL

README.md

@@ -17,6 +17,7 @@ Currently, the following examples exist:
 * _mapstruct-spi-accessor-naming_: Example on how to use the Service Provider Interface (SPI) for a custom accessor naming strategy.
 * _mapstruct-protobuf3_: Example on how to use protobuf3 with MapStruct
 * _mapstruct-kotlin_: Example on how to use MapStruct with Kotlin using KAPT (Kotlin Annotation Processing Tool)
+* _mapstruct-kotlin-gradle_: Example on how to use MapStruct with Kotlin and Gradle Kotlin DSL using KAPT
 * _mapstruct-jpa-parent-child_: Example on how to use @Context in relation to parent / child relations in JPA)
 * _mapstruct-lookup-entity-with-composed-key_: Shows how an object with composite key can be read from the database in a mapping method.
 

mapstruct-kotlin-gradle/build.gradle.kts

@@ -0,0 +1,31 @@
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
+plugins {
+    kotlin("jvm") version "1.2.71"
+    kotlin("kapt") version "1.2.71"
+}
+
+group = "org.mapstruct.examples"
+version = "1.0.0-SNAPSHOT"
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    compile(kotlin("stdlib-jdk8"))
+    compile("org.mapstruct:mapstruct-jdk8:1.2.0.Final")
+    kapt("org.mapstruct:mapstruct-processor:1.2.0.Final")
+
+    testCompile("org.junit.jupiter:junit-jupiter-api:5.3.1")
+    testCompile("org.junit.jupiter:junit-jupiter-engine:5.3.1")
+    testCompile("org.assertj:assertj-core:3.11.1")
+}
+
+tasks.withType<KotlinCompile> {
+    kotlinOptions.jvmTarget = "1.8"
+}
+
+val test by tasks.getting(Test::class) {
+    useJUnitPlatform { }
+}

mapstruct-kotlin-gradle/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.8-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

mapstruct-kotlin-gradle/settings.gradle

@@ -0,0 +1,2 @@
+rootProject.name = 'mapstruct-kotlin-gradle'
+

mapstruct-kotlin-gradle/src/main/kotlin/org/mapstruct/example/kotlin/Main.kt

@@ -0,0 +1,20 @@
+package org.mapstruct.example.kotlin
+
+import org.mapstruct.example.kotlin.converter.PersonConverter
+import org.mapstruct.example.kotlin.model.Person
+import org.mapstruct.factory.Mappers
+import java.time.LocalDate
+
+fun main(args: Array<String>) {
+
+    val converter = Mappers.getMapper(PersonConverter::class.java) // or PersonConverterImpl()
+
+    val person = Person("Samuel", "Jackson", "0123 334466", LocalDate.of(1948, 12, 21))
+
+    val personDto = converter.convertToDto(person)
+    println(personDto)
+
+    val personModel = converter.convertToModel(personDto)
+    println(personModel)
+
+}

mapstruct-kotlin-gradle/src/main/kotlin/org/mapstruct/example/kotlin/converter/PersonConverter.kt

@@ -0,0 +1,18 @@
+package org.mapstruct.example.kotlin.converter
+
+import org.mapstruct.InheritInverseConfiguration
+import org.mapstruct.Mapper
+import org.mapstruct.Mapping
+import org.mapstruct.example.kotlin.dto.PersonDto
+import org.mapstruct.example.kotlin.model.Person
+
+@Mapper
+interface PersonConverter {
+
+    @Mapping(source = "phoneNumber", target = "phone")
+    fun convertToDto(person: Person): PersonDto
+
+    @InheritInverseConfiguration
+    fun convertToModel(personDto: PersonDto): Person
+
+}

mapstruct-kotlin-gradle/src/main/kotlin/org/mapstruct/example/kotlin/dto/PersonDto.kt

@@ -0,0 +1,10 @@
+package org.mapstruct.example.kotlin.dto
+
+import java.time.LocalDate
+
+data class PersonDto(var firstName: String?, var lastName: String?, var phone: String?, var birthdate: LocalDate?) {
+
+    // Necessary for MapStruct
+    constructor() : this(null, null, null, null)
+
+}

mapstruct-kotlin-gradle/src/main/kotlin/org/mapstruct/example/kotlin/model/Person.kt

@@ -0,0 +1,10 @@
+package org.mapstruct.example.kotlin.model
+
+import java.time.LocalDate
+
+data class Person(var firstName: String?, var lastName: String?, var phoneNumber: String?, var birthdate: LocalDate?) {
+
+    // Necessary for MapStruct
+    constructor() : this(null, null, null, null)
+
+}