Kotin class java.lang.ClassNotFoundException  #84

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1. filiphr commented on Jul 5, 2020

   

   filiphr

   on Jul 5, 2020

   Member

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   Can you please tell us how you are building the project?

   Asking because our CI is green. See https://github.com/mapstruct/mapstruct-examples/runs/767089987
2. Jozott00 commented on Jul 14, 2021

   

   Jozott00

   on Jul 14, 2021

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   I have the same problem using the Mapstruct-Kotlin-Maven example. I use Intellij as IDE.

   Exception in thread "main" java.lang.RuntimeException: java.lang.ClassNotFoundException: Cannot find implementation for org.mapstruct.example.kotlin.converter.PersonConverter
   	at org.mapstruct.factory.Mappers.getMapper(Mappers.java:61)
   	at org.mapstruct.example.kotlin.MainKt.main(Main.kt:10)
   
3. otoman commented on Jul 28, 2021

   

   otoman

   on Jul 28, 2021

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   Hi, same problem here... JDK 16, Kotlin 1.5.21, Maven, IntelliJ IDEA...
4. otoman commented on Jul 29, 2021

   

   otoman

   on Jul 29, 2021

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   Problem is in KAPT incompatibility with newer versions of JDK https://youtrack.jetbrains.com/issue/KT-45545
5. fire-papaya commented on Jul 31, 2021

   

   fire-papaya

   on Jul 31, 2021

   Last edited by fire-papaya

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   Facing the same problem with: JDK 11, Kotlin 1.43.2, MapStruct 1.5.0.Beta1, IntelliJ IDEA

   My build.gradle

   plugins {
       id 'java'
       ...
       id 'org.jetbrains.kotlin.jvm' version "1.4.32"
       id 'org.jetbrains.kotlin.plugin.spring' version "1.4.32"
       id 'org.jetbrains.kotlin.plugin.jpa' version "1.4.32"
       id "org.jetbrains.kotlin.kapt" version "1.4.32"
   }
   
   dependencies {
       ...
       implementation 'org.mapstruct:mapstruct:1.5.0.Beta1'
       annotationProcessor 'org.mapstruct:mapstruct-processor:1.5.0.Beta1'
       testAnnotationProcessor 'org.mapstruct:mapstruct-processor:1.5.0.Beta1'
   }
   
   tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).configureEach {
       kotlinOptions {
           freeCompilerArgs = ["-Xjsr305=strict"]
           jvmTarget = "11"
       }
   }
   

   Tried launching with org.gradle.jvmargs='--illegal-access=permit', result is the same

   EDIT

   changed dependencies part to:

   dependencies {
       ...
       implementation 'org.mapstruct:mapstruct:1.5.0.Beta1'
       kapt 'org.mapstruct:mapstruct-processor:1.5.0.Beta1'
       kapt 'org.mapstruct:mapstruct-processor:1.5.0.Beta1'
   }
   

   And now it works, apologies for the confusion. org.gradle.jvmargs='--illegal-access=permit' is not required