ing

registry.go

@@ -129,8 +129,17 @@ func (r *AnnotationRegistry) getAnnotation(f *reflect.StructField) (map[reflect.
 		}
 
 		name := fmt.Sprintf("@%s", strings.TrimSpace(rs[1]))
-		body := rs[2]
+		body := strings.TrimSpace(rs[2])
 
+		def, ok := r.definitions[name]
+		if !ok {
+			return nil, fmt.Errorf("annotation[%s] is not exist", name)
+		}
+
+		v := reflect.New(def.rt)
+		i := v.Interface()
+
+		if "" != body {
 			if !AnnotationBodyRGX.MatchString(body) {
 				return nil, fmt.Errorf("Body[%s] of annotation[%s] is not valid", body, name)
 			}
@@ -145,18 +154,11 @@ func (r *AnnotationRegistry) getAnnotation(f *reflect.StructField) (map[reflect.
 			})
 			body = fmt.Sprintf("{%s}", strings.TrimSpace(body))
 
-		def, ok := r.definitions[name]
-		if !ok {
-			return nil, fmt.Errorf("annotation[%s] is not exist", name)
-		}
-
-		v := reflect.New(def.rt)
-		i := v.Interface()
-
 			err := json.Unmarshal([]byte(body), i)
 			if nil != err {
 				return nil, fmt.Errorf("Unmarshal failed %v", err)
 			}
+		}
 
 		annotations[def.t] = i
 	}