@BeanParam enum field losing type and enum when @Schema(defaultValue)…

core/src/main/java/io/smallrye/openapi/runtime/scanner/spi/AbstractParameterProcessor.java

@@ -659,8 +659,33 @@
         }
     }
 
     void mapParameterSchema(Parameter param, ParameterContext context) {
-        if (ModelUtil.parameterHasSchema(param) || context.targetType == null) {
+        if (context.targetType == null) {
+            return;
+        }
+
+        if (ModelUtil.parameterHasSchema(param)) {
+            Schema existingSchema = param.getSchema();
+            if (existingSchema != null && existingSchema.getRef() == null && existingSchema.getType() == null) {
+                Schema typeSchema = SchemaFactory.typeToSchema(scannerContext, context.targetType, null);
+                if (typeSchema != null) {
+                    if (typeSchema.getRef() != null) {
+                        Schema resolved = ModelUtil.getComponent(scannerContext.getOpenApi(), typeSchema.getRef());
+                        if (resolved != null) {
+                            typeSchema = resolved;
+                        }
+                    }
+                    if (typeSchema.getType() != null) {
+                        existingSchema.setType(typeSchema.getType());
+                    }
+                    if (existingSchema.getEnumeration() == null && typeSchema.getEnumeration() != null) {
+                        existingSchema.setEnumeration(typeSchema.getEnumeration());
+                    }
+                    if (existingSchema.getFormat() == null && typeSchema.getFormat() != null) {
+                        existingSchema.setFormat(typeSchema.getFormat());
+                    }
+                }
+            }
             return;
         }
 

extension-jaxrs/src/test/java/io/smallrye/openapi/runtime/scanner/ParameterScanTests.java

@@ -161,6 +161,31 @@ void testJakartaParameterInBeanFromField() throws IOException, JSONException {
                 test.io.smallrye.openapi.runtime.scanner.Widget.class);
     }
 
+    @Test
+    void testBeanParamEnumDefaultValue() throws IOException, JSONException {
+        class QueryOptions {
+            @jakarta.ws.rs.QueryParam("sortOrder")
+            @Parameter(description = "Sort direction", schema = @Schema(defaultValue = "ASC"))
+            SortOrder sortOrder;
+        }
+
+        @jakarta.ws.rs.Path("/beanparam-enum-default")
+        class ListResource {
+            @jakarta.ws.rs.GET
+            @jakarta.ws.rs.Produces(jakarta.ws.rs.core.MediaType.APPLICATION_JSON)
+            public String list(@jakarta.ws.rs.BeanParam QueryOptions options) {
+                return "ok";
+            }
+        }
+
+        test("params.beanparam-enum-default-value.json", SortOrder.class, QueryOptions.class, ListResource.class);
+    }
+
+    enum SortOrder {
+        ASC,
+        DESC
+    }
+
     @Test
     void testJavaxParameterInBeanFromSetter() throws IOException, JSONException {
         test("params.parameter-in-bean-from-setter.json",

extension-jaxrs/src/test/resources/io/smallrye/openapi/runtime/scanner/params.beanparam-enum-default-value.json

@@ -0,0 +1,47 @@
+{
+  "openapi": "3.1.0",
+  "paths": {
+    "/beanparam-enum-default": {
+      "get": {
+        "parameters": [
+          {
+            "name": "sortOrder",
+            "in": "query",
+            "description": "Sort direction",
+            "schema": {
+              "default": "ASC",
+              "enum": [
+                "ASC",
+                "DESC"
+              ],
+              "type": "string"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "OK",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "type": "string"
+                }
+              }
+            }
+          }
+        }
+      }
+    }
+  },
+  "components": {
+    "schemas": {
+      "SortOrder": {
+        "enum": [
+          "ASC",
+          "DESC"
+        ],
+        "type": "string"
+      }
+    }
+  }
+}