java.lang.ClassNotFoundException: kotlin.reflect.full.KClasses when upgrade from 2.7.0 to 2.8.0. Fixes #2834

Author: bnasslahsen

springdoc-openapi-starter-common/pom.xml

@@ -72,6 +72,11 @@
 			<artifactId>kotlinx-coroutines-reactor</artifactId>
 			<scope>provided</scope>
 		</dependency>
+		<dependency>
+			<groupId>org.jetbrains.kotlin</groupId>
+			<artifactId>kotlin-reflect</artifactId>
+			<scope>provided</scope>
+		</dependency>
 		<!-- Spring Web /Data Rest/Hateoas && For Enhanced Pageable Support-->
 		<dependency>
 			<groupId>org.springframework.boot</groupId>

springdoc-openapi-starter-common/src/main/java/org/springdoc/core/configuration/SpringDocKotlinConfiguration.kt

@@ -128,10 +128,15 @@ class SpringDocKotlinConfiguration() {
 		return kotlinFunction.parameters[parameterIndex + 1]
 	}
 
-	@Bean
-	@Lazy(false)
-	@ConditionalOnMissingBean
-	fun kotlinDeprecatedPropertyCustomizer(objectMapperProvider: ObjectMapperProvider): KotlinDeprecatedPropertyCustomizer {
-		return KotlinDeprecatedPropertyCustomizer(objectMapperProvider)
+	@ConditionalOnClass(name = ["kotlin.reflect.full.KClasses"])
+	class KotlinReflectDependingConfiguration {
+
+		@Bean
+		@Lazy(false)
+		@ConditionalOnMissingBean
+		fun kotlinDeprecatedPropertyCustomizer(objectMapperProvider: ObjectMapperProvider): KotlinDeprecatedPropertyCustomizer {
+			return KotlinDeprecatedPropertyCustomizer(objectMapperProvider)
+		}
 	}
+
 }