All request headers marked as required for Java controllers in mixed projects in 2.0.3. Fixes #2187

Author: bnasslahsen

springdoc-openapi-kotlin/src/main/java/org/springdoc/kotlin/SpringDocKotlinConfiguration.kt

@@ -14,6 +14,7 @@ import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty
 import org.springframework.context.annotation.Bean
 import org.springframework.context.annotation.Configuration
 import org.springframework.context.annotation.Lazy
+import org.springframework.core.KotlinDetector
 import org.springframework.core.MethodParameter
 import org.springframework.core.annotation.AnnotatedElementUtils
 import org.springframework.web.bind.annotation.RequestParam
@@ -71,27 +72,30 @@ class SpringDocKotlinConfiguration(objectMapperProvider: ObjectMapperProvider) {
 		matchIfMissing = true
 	)
 	@ConditionalOnMissingBean
-	fun nullableKotlinRequestParameterCustomizer(): ParameterCustomizer {
+	open fun nullableKotlinRequestParameterCustomizer(): ParameterCustomizer {
 		return ParameterCustomizer { parameterModel, methodParameter ->
 			if (parameterModel == null) return@ParameterCustomizer null
-			val kParameter = methodParameter.toKParameter()
-			if (kParameter != null) {
-				val parameterDoc = AnnotatedElementUtils.findMergedAnnotation(
-					AnnotatedElementUtils.forAnnotations(*methodParameter.parameterAnnotations),
-					Parameter::class.java
-				)
-				val requestParam = AnnotatedElementUtils.findMergedAnnotation(
+			if (KotlinDetector.isKotlinType(methodParameter.parameterType)) {
+				val kParameter = methodParameter.toKParameter()
+				if (kParameter != null) {
+					val parameterDoc = AnnotatedElementUtils.findMergedAnnotation(
+						AnnotatedElementUtils.forAnnotations(*methodParameter.parameterAnnotations),
+						Parameter::class.java
+					)
+					val requestParam = AnnotatedElementUtils.findMergedAnnotation(
 						AnnotatedElementUtils.forAnnotations(*methodParameter.parameterAnnotations),
 						RequestParam::class.java
-				)
-				// Swagger @Parameter annotation takes precedence
-				if (parameterDoc != null && parameterDoc.required)
-					parameterModel.required = parameterDoc.required
-				// parameter is not required if a default value is provided in @RequestParam
-				else if (requestParam != null && ((requestParam.defaultValue != ValueConstants.DEFAULT_NONE) || !requestParam.required))
-					parameterModel.required = false
-				else
-					parameterModel.required = kParameter.type.isMarkedNullable == false
+					)
+					// Swagger @Parameter annotation takes precedence
+					if (parameterDoc != null && parameterDoc.required)
+						parameterModel.required = parameterDoc.required
+					// parameter is not required if a default value is provided in @RequestParam
+					else if (requestParam != null && requestParam.defaultValue != ValueConstants.DEFAULT_NONE)
+						parameterModel.required = false
+					else
+						parameterModel.required =
+							kParameter.type.isMarkedNullable == false
+				}
 			}
 			return@ParameterCustomizer parameterModel
 		}

springdoc-openapi-kotlin/src/test/java/test/org/springdoc/api/app21/HelloController.java

@@ -5,6 +5,7 @@
 
 import org.springframework.http.MediaType;
 import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestHeader;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
@@ -17,4 +18,8 @@ public class HelloController {
 	@GetMapping("/")
 	public void greet(@RequestParam(required = false) @Parameter(required = false) final String name) {
 	}
+
+	@GetMapping("/test2")
+	public void greet1(@RequestHeader(required = false) @Parameter(required = false) final String name) {
+	}
 }

springdoc-openapi-kotlin/src/test/resources/results/app21.json

@@ -11,6 +11,29 @@
     }
   ],
   "paths": {
+    "/api/v2/test/test2": {
+      "get": {
+        "tags": [
+          "Test"
+        ],
+        "operationId": "greet1",
+        "parameters": [
+          {
+            "name": "name",
+            "in": "header",
+            "required": false,
+            "schema": {
+              "type": "string"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "OK"
+          }
+        }
+      }
+    },
     "/api/v2/test/": {
       "get": {
         "tags": [