| /* |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to You under the Apache License, Version 2.0 |
| (the "License"); you may not use this file except in compliance with |
| the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| */ |
| |
| package utils |
| |
| import ( |
| "reflect" |
| ) |
| |
| // WalkFields get the field data by tag |
| func WalkFields(t reflect.Type, filter func(field *reflect.StructField) bool) (f []reflect.StructField) { |
| if t.Kind() == reflect.Ptr { |
| t = t.Elem() |
| } |
| |
| if filter == nil { |
| for i := 0; i < t.NumField(); i++ { |
| field := t.Field(i) |
| if field.Type.Kind() == reflect.Struct { |
| f = append(f, WalkFields(field.Type, filter)...) |
| } else { |
| f = append(f, field) |
| } |
| } |
| } else { |
| for i := 0; i < t.NumField(); i++ { |
| field := t.Field(i) |
| if filter(&field) { |
| f = append(f, field) |
| } else if field.Type.Kind() == reflect.Struct { |
| f = append(f, WalkFields(field.Type, filter)...) |
| } |
| } |
| } |
| |
| return f |
| } |