UnsatisfiedDependencyException with custom ID mapping in Kotlin [DATAREST-1433]

Kramer Campbell opened DATAREST-1433 and commented

With the default Maven configuration from Spring Initializr with Spring Boot 2.2.0 M6, Kotlin, and with the dependencies Spring Web, Spring Data JPA, and Rest Repositories, take this Kotlin version of the Customizing Item Resource URIs documentation example:

@Configuration
class SpringDataRestCustomization : RepositoryRestConfigurer {
    override fun configureRepositoryRestConfiguration(config: RepositoryRestConfiguration) {
        config.withEntityLookup()
            .forRepository<User, Long, UserRepository>(UserRepository::class.java)
            .withIdMapping(User::username)
            .withLookup(UserRepository::findByUsername)
    }
}

And with this JPA entity:

@Entity
class User(
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    val id: Long? = null,
    val username: String?
)

This works fine on Spring Data REST 3.1.11 but on Spring Data REST 3.2.0 it produces this rather perplexing error:

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'repositoryPropertyReferenceController' defined in URL [jar:file:/home/kramer/.m2/repository/org/springframework/data/spring-data-rest-webmvc/3.2.0.RC3/spring-data-rest-webmvc-3.2.0.RC3.jar!/org/springframework/data/rest/webmvc/RepositoryPropertyReferenceController.class]: Unsatisfied dependency expressed through constructor parameter 1; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'repositoryInvokerFactory' defined in class path resource [org/springframework/data/rest/webmvc/config/RepositoryRestMvcConfiguration.class]: Unsatisfied dependency expressed through method 'repositoryInvokerFactory' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'defaultConversionService' defined in class path resource [org/springframework/data/rest/webmvc/config/RepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.format.support.DefaultFormattingConversionService]: Factory method 'defaultConversionService' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'repositoryInvokerFactory' defined in class path resource [org/springframework/data/rest/webmvc/config/RepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.repository.support.RepositoryInvokerFactory]: Factory method 'repositoryInvokerFactory' threw exception; nested exception is java.lang.IllegalArgumentException: Type to record invocations on must not be final!
	at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:787) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:226) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1359) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1205) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:557) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:878) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877) ~[spring-context-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.2.0.M6.jar:2.2.0.M6]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.0.M6.jar:2.2.0.M6]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.0.M6.jar:2.2.0.M6]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.0.M6.jar:2.2.0.M6]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.0.M6.jar:2.2.0.M6]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.0.M6.jar:2.2.0.M6]
	at com.example.datarestbug.DatarestbugApplicationKt.main(DatarestbugApplication.kt:13) [classes/:na]
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'repositoryInvokerFactory' defined in class path resource [org/springframework/data/rest/webmvc/config/RepositoryRestMvcConfiguration.class]: Unsatisfied dependency expressed through method 'repositoryInvokerFactory' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'defaultConversionService' defined in class path resource [org/springframework/data/rest/webmvc/config/RepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.format.support.DefaultFormattingConversionService]: Factory method 'defaultConversionService' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'repositoryInvokerFactory' defined in class path resource [org/springframework/data/rest/webmvc/config/RepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.repository.support.RepositoryInvokerFactory]: Factory method 'repositoryInvokerFactory' threw exception; nested exception is java.lang.IllegalArgumentException: Type to record invocations on must not be final!
	at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:787) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:528) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1339) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1178) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:557) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1284) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1204) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:874) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:778) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	... 19 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'defaultConversionService' defined in class path resource [org/springframework/data/rest/webmvc/config/RepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.format.support.DefaultFormattingConversionService]: Factory method 'defaultConversionService' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'repositoryInvokerFactory' defined in class path resource [org/springframework/data/rest/webmvc/config/RepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.repository.support.RepositoryInvokerFactory]: Factory method 'repositoryInvokerFactory' threw exception; nested exception is java.lang.IllegalArgumentException: Type to record invocations on must not be final!
	at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:645) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:475) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1339) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1178) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:557) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1284) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1204) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:874) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:778) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	... 33 common frames omitted
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.format.support.DefaultFormattingConversionService]: Factory method 'defaultConversionService' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'repositoryInvokerFactory' defined in class path resource [org/springframework/data/rest/webmvc/config/RepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.repository.support.RepositoryInvokerFactory]: Factory method 'repositoryInvokerFactory' threw exception; nested exception is java.lang.IllegalArgumentException: Type to record invocations on must not be final!
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:640) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	... 47 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'repositoryInvokerFactory' defined in class path resource [org/springframework/data/rest/webmvc/config/RepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.repository.support.RepositoryInvokerFactory]: Factory method 'repositoryInvokerFactory' threw exception; nested exception is java.lang.IllegalArgumentException: Type to record invocations on must not be final!
	at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:645) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:625) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1339) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1178) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:557) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:212) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.resolveBeanReference(ConfigurationClassEnhancer.java:393) ~[spring-context-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:366) ~[spring-context-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration$$EnhancerBySpringCGLIB$$c0405f5c.repositoryInvokerFactory(<generated>) ~[spring-data-rest-webmvc-3.2.0.RC3.jar:3.2.0.RC3]
	at org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration.uriToEntityConverter(RepositoryRestMvcConfiguration.java:608) ~[spring-data-rest-webmvc-3.2.0.RC3.jar:3.2.0.RC3]
	at org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration.defaultConversionService(RepositoryRestMvcConfiguration.java:239) ~[spring-data-rest-webmvc-3.2.0.RC3.jar:3.2.0.RC3]
	at org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration$$EnhancerBySpringCGLIB$$c0405f5c.CGLIB$defaultConversionService$4(<generated>) ~[spring-data-rest-webmvc-3.2.0.RC3.jar:3.2.0.RC3]
	at org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration$$EnhancerBySpringCGLIB$$c0405f5c$$FastClassBySpringCGLIB$$262fd106.invoke(<generated>) ~[spring-data-rest-webmvc-3.2.0.RC3.jar:3.2.0.RC3]
	at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) ~[spring-core-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:363) ~[spring-context-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration$$EnhancerBySpringCGLIB$$c0405f5c.defaultConversionService(<generated>) ~[spring-data-rest-webmvc-3.2.0.RC3.jar:3.2.0.RC3]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_222]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_222]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_222]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_222]
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	... 48 common frames omitted
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.repository.support.RepositoryInvokerFactory]: Factory method 'repositoryInvokerFactory' threw exception; nested exception is java.lang.IllegalArgumentException: Type to record invocations on must not be final!
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:640) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	... 72 common frames omitted
Caused by: java.lang.IllegalArgumentException: Type to record invocations on must not be final!
	at org.springframework.util.Assert.isTrue(Assert.java:118) ~[spring-core-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.data.util.MethodInvocationRecorder.forProxyOf(MethodInvocationRecorder.java:76) ~[spring-data-commons-2.2.0.RC3.jar:2.2.0.RC3]
	at org.springframework.data.rest.core.config.EntityLookupConfiguration$RepositoriesEntityLookup.lambda$new$2(EntityLookupConfiguration.java:200) ~[spring-data-rest-core-3.2.0.RC3.jar:3.2.0.RC3]
	at java.util.Optional.flatMap(Optional.java:241) ~[na:1.8.0_222]
	at org.springframework.data.rest.core.config.EntityLookupConfiguration$RepositoriesEntityLookup.<init>(EntityLookupConfiguration.java:200) ~[spring-data-rest-core-3.2.0.RC3.jar:3.2.0.RC3]
	at org.springframework.data.rest.core.config.EntityLookupConfiguration.lambda$getEntityLookups$0(EntityLookupConfiguration.java:156) ~[spring-data-rest-core-3.2.0.RC3.jar:3.2.0.RC3]
	at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) ~[na:1.8.0_222]
	at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1382) ~[na:1.8.0_222]
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482) ~[na:1.8.0_222]
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472) ~[na:1.8.0_222]
	at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) ~[na:1.8.0_222]
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:1.8.0_222]
	at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:566) ~[na:1.8.0_222]
	at org.springframework.data.rest.core.config.EntityLookupConfiguration.getEntityLookups(EntityLookupConfiguration.java:157) ~[spring-data-rest-core-3.2.0.RC3.jar:3.2.0.RC3]
	at org.springframework.data.rest.core.config.RepositoryRestConfiguration.getEntityLookups(RepositoryRestConfiguration.java:654) ~[spring-data-rest-core-3.2.0.RC3.jar:3.2.0.RC3]
	at org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration.getEntityLookups(RepositoryRestMvcConfiguration.java:747) ~[spring-data-rest-webmvc-3.2.0.RC3.jar:3.2.0.RC3]
	at org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration.repositoryInvokerFactory(RepositoryRestMvcConfiguration.java:647) ~[spring-data-rest-webmvc-3.2.0.RC3.jar:3.2.0.RC3]
	at org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration$$EnhancerBySpringCGLIB$$c0405f5c.CGLIB$repositoryInvokerFactory$26(<generated>) ~[spring-data-rest-webmvc-3.2.0.RC3.jar:3.2.0.RC3]
	at org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration$$EnhancerBySpringCGLIB$$c0405f5c$$FastClassBySpringCGLIB$$262fd106.invoke(<generated>) ~[spring-data-rest-webmvc-3.2.0.RC3.jar:3.2.0.RC3]
	at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) ~[spring-core-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:363) ~[spring-context-5.2.0.RC2.jar:5.2.0.RC2]
	at org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration$$EnhancerBySpringCGLIB$$c0405f5c.repositoryInvokerFactory(<generated>) ~[spring-data-rest-webmvc-3.2.0.RC3.jar:3.2.0.RC3]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_222]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_222]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_222]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_222]
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.2.0.RC2.jar:5.2.0.RC2]
	... 73 common frames omitted

I found that this error is due to the JPA entity class being final, which wasn't a requirement to have non-final before in Spring Data REST 3.1.11. I was able to workaround this problem by adding the Kotlin all-open compiler plugin and applying it to the javax.persistence.Entity annotation. After a clean and recompile, the configuration works again. The plugin configuration in pom.xml now looks like this:

<compilerPlugins>
	<plugin>spring</plugin>
	<plugin>jpa</plugin>
	<plugin>all-open</plugin>
</compilerPlugins>
<pluginOptions>
	<option>all-open:annotation=javax.persistence.Entity</option>
</pluginOptions>

Affects: 3.2 GA (Moore)

Issue Links:

• DATAREST-1304 PUT and PATCH don't work, when custom entity lookup is configured

• DATAMONGO-2138 Type-safe Kotlin query extension