Simplify DataType()

keywords.go

@@ -19,37 +19,31 @@ var primitiveTypes = map[string]bool{
 	"integer": true,
 }
 
-var dataTypes = map[reflect.Kind]string{
-	reflect.Bool: "boolean",
-	reflect.Float64: "number",
-	reflect.String: "string",
-	reflect.Array: "array",
-	reflect.Slice: "array",
-	reflect.Map: "object",
-	reflect.Struct: "object",
-}
-
 // DataType gives the primitive json type of a standard json-decoded value, plus the special case
 // "integer" for when numbers are whole
 func DataType(data interface{}) string {
 	if data == nil {
 		return "null"
 	}
 
-	kind := reflect.TypeOf(data).Kind()
-	typeStr, ok := dataTypes[kind]
-	if !ok {
-		return "unknown"
-	}
-
-	if kind == reflect.Float64 {
+	switch reflect.TypeOf(data).Kind() {
+	case reflect.Bool:
+		return "boolean"
+	case reflect.Float64:
 		number := reflect.ValueOf(data).Float()
 		if float64(int(number)) == number {
 			return "integer"
 		}
+		return "number"
+	case reflect.String:
+		return "string"
+	case reflect.Array, reflect.Slice:
+		return "array"
+	case reflect.Map, reflect.Struct:
+		return "object"
+	default:
+		return "unknown"
 	}
-
-	return typeStr
 }
 
 // Type specifies one of the six json primitive types.