Kotlin 2.0.20, JVM21, SpringBoot 3.3.3, value classes, reflection error with CoroutineCrudRepository #3143
Closed as not planned
Description
Kotlin 2.0.20, JVM21 (graalvm-jdk-21.0.3+7.1), SpringBoot 3.3.3. The following code is available:
package org.somepkg.repo.invite
import org.springframework.data.annotation.Id
import org.springframework.data.annotation.Transient
import org.springframework.data.relational.core.mapping.Table
import org.springframework.data.repository.kotlin.CoroutineCrudRepository
import org.springframework.stereotype.Service
import java.io.Serializable
//=========================================================
@JvmInline
value class TestValueClass<T>(private val someValue: BoxImpl<T>) : Box<T> by someValue {
fun someFun(): Box<T> = someValue
constructor(initValue: T) : this(BoxImpl(initValue))
}
//=========================================================
sealed interface Box<T>
class BoxImpl<T>(val t: T) : Box<T>
//=========================================================
abstract class AbstractEntity(
@Transient
override val entityId: Long
) : Entity {
@delegate:Transient
@get:Transient
val valueClassInstance: TestValueClass<String> by lazy {
TestValueClass("someValue")
}
}
//=========================================================
sealed interface Entity : Serializable {
val entityId: Long
}
//=========================================================
@Table("table_entity")
data class FinalEntity(
@Id
val inviteId: Long,
val inviteCode: String,
) : AbstractEntity(inviteId)
//=========================================================
interface FailedRepo : CoroutineCrudRepository<FinalEntity, Long> {
suspend fun findByInviteCode(inviteCode: String): FinalEntity?
}
//=========================================================
@Service
class InviteService4Test(val failedRepo: FailedRepo) {
suspend fun doSomething() {
failedRepo.findByInviteCode("someCode")?.valueClassInstance?.someFun()
}
}
The following error occurs when starting the spring boot application (see stacktrace applied below)
The error occurs from using value class (TestValueClass).
When this class is implemented as a regular class (without the @JvmInline annotation and “value” marker), the application starts normally, without any error
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'failedRepo' defined in org.dbs.sandbox.repo.invite.FailedRepo defined in @EnableR2dbcRepositories declared on SandBoxApplication: Cannot invoke "java.lang.reflect.Type.getClass()" because "formal" is null
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1806)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:600)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:522)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:337)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:335)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:969)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:971)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:625)
at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.refresh(ReactiveWebServerApplicationContext.java:66)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:456)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:335)
at org.dbs.spring.boot.api.AbstractSpringBootApplication$SpringBootSubscriber.onNext(AbstractSpringBootApplication.kt:100)
at org.dbs.spring.boot.api.AbstractSpringBootApplication$SpringBootSubscriber.onNext(AbstractSpringBootApplication.kt:76)
at reactor.core.publisher.StrictSubscriber.onNext(StrictSubscriber.java:89)
at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2571)
at reactor.core.publisher.StrictSubscriber.onSubscribe(StrictSubscriber.java:77)
at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:55)
at reactor.core.publisher.Mono.subscribe(Mono.java:4576)
at org.dbs.spring.boot.api.AbstractSpringBootApplication$Companion.runSpringBootApplication(AbstractSpringBootApplication.kt:268)
at org.dbs.spring.boot.api.AbstractSpringBootApplication$Companion.runSpringBootApplication(AbstractSpringBootApplication.kt:245)
at org.dbs.sandbox.SandBoxApplication$Companion.main(SandBoxApplication.kt:20)
at org.dbs.sandbox.SandBoxApplication.main(SandBoxApplication.kt)
Caused by: java.lang.NullPointerException: Cannot invoke "java.lang.reflect.Type.getClass()" because "formal" is null
at java.desktop/com.sun.beans.TypeResolver.resolve(TypeResolver.java:203)
at java.desktop/com.sun.beans.TypeResolver.resolve(TypeResolver.java:218)
at java.desktop/com.sun.beans.TypeResolver.resolve(TypeResolver.java:169)
at java.desktop/com.sun.beans.TypeResolver.resolveInClass(TypeResolver.java:81)
at java.desktop/java.beans.FeatureDescriptor.getReturnType(FeatureDescriptor.java:374)
at java.desktop/java.beans.PropertyDescriptor.findPropertyType(PropertyDescriptor.java:686)
at java.desktop/java.beans.PropertyDescriptor.setReadMethod(PropertyDescriptor.java:281)
at java.desktop/java.beans.PropertyDescriptor.<init>(PropertyDescriptor.java:141)
at org.springframework.data.util.KotlinBeanInfoFactory.getBeanInfo(KotlinBeanInfoFactory.java:83)
at org.springframework.beans.CachedIntrospectionResults.getBeanInfo(CachedIntrospectionResults.java:222)
at org.springframework.beans.CachedIntrospectionResults.<init>(CachedIntrospectionResults.java:248)
at org.springframework.beans.CachedIntrospectionResults.forClass(CachedIntrospectionResults.java:157)
at org.springframework.beans.BeanUtils.getPropertyDescriptors(BeanUtils.java:488)
at org.springframework.data.mapping.context.AbstractMappingContext.doAddPersistentEntity(AbstractMappingContext.java:463)
at org.springframework.data.mapping.context.AbstractMappingContext.addPersistentEntity(AbstractMappingContext.java:424)
at org.springframework.data.mapping.context.AbstractMappingContext.getPersistentEntity(AbstractMappingContext.java:320)
at org.springframework.data.mapping.context.AbstractMappingContext.getPersistentEntity(AbstractMappingContext.java:246)
at org.springframework.data.mapping.context.AbstractMappingContext.getPersistentEntity(AbstractMappingContext.java:97)
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.lambda$afterPropertiesSet$6(RepositoryFactoryBeanSupport.java:289)
at java.base/java.util.Optional.ifPresent(Optional.java:178)
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:289)
at org.springframework.data.r2dbc.repository.support.R2dbcRepositoryFactoryBean.afterPropertiesSet(R2dbcRepositoryFactoryBean.java:159)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1853)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1802)
... 24 more