Spring Framework Custom annotation as Bean loader

CustomBeanConfig.kt

import org.springframework.beans.factory.config.ConfigurableListableBeanFactory 
import org.springframework.beans.factory.support.BeanDefinitionRegistry 
import org.springframework.beans.factory.support.BeanDefinitionRegistryPostProcessor 
import org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider 
import org.springframework.context.annotation.Configuration 
import org.springframework.core.type.filter.AnnotationTypeFilter 

@Configuration 
class AnnotationConfig : BeanDefinitionRegistryPostProcessor { 
    override fun postProcessBeanFactory(beanFactory: ConfigurableListableBeanFactory) { 
    } 

    override fun postProcessBeanDefinitionRegistry(registry: BeanDefinitionRegistry) { 
        val scanner = ClassPathScanningCandidateComponentProvider(false) 
        scanner.addIncludeFilter(AnnotationTypeFilter(MyAnnotation::class.java)) 

        // Speedup for specific package names 
        scanner.findCandidateComponents("PACKAGE_NAME") 
            .forEach { 
                // According to the documentation using this as bean name here could be dangerous, 
                // but using this value is safe unless annotated class is a simple(a final type) object. 
                val name = it.beanClassName!! 

                registry.registerBeanDefinition(name, it) 
            }
    }
} 


@Target(AnnotationTarget.CLASS) 
@Retention(AnnotationRetention.RUNTIME) 
@MustBeDocumented 
annotation class MyAnnotation