package component import ( "git.noahlan.cn/northlan/ngs/session" "reflect" "unicode" "unicode/utf8" ) var ( typeOfError = reflect.TypeOf((*error)(nil)).Elem() typeOfBytes = reflect.TypeOf(([]byte)(nil)) typeOfSession = reflect.TypeOf(session.New(nil)) ) func isExported(name string) bool { w, _ := utf8.DecodeRuneInString(name) return unicode.IsUpper(w) } func isExportedOrBuiltinType(t reflect.Type) bool { for t.Kind() == reflect.Ptr { t = t.Elem() } // PkgPath will be non-empty even for an exported type, // so we need to check the type name as well. return isExported(t.Name()) || t.PkgPath() == "" } // isHandlerMethod decide a method is suitable handler method func isHandlerMethod(method reflect.Method) bool { mt := method.Type // Method must be exported. if method.PkgPath != "" { return false } // Method needs three ins: receiver, *Session, []byte or pointer. if mt.NumIn() != 3 { return false } // Method needs one outs: error if mt.NumOut() != 1 { return false } if t1 := mt.In(1); t1.Kind() != reflect.Ptr || t1 != typeOfSession { return false } if (mt.In(2).Kind() != reflect.Ptr && mt.In(2) != typeOfBytes) || mt.Out(0) != typeOfError { return false } return true }