| /* |
| Copyright 2018 The Kubernetes Authors. |
| |
| Licensed 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 rules |
| |
| import ( |
| "reflect" |
| "strings" |
| |
| "k8s.io/gengo/types" |
| ) |
| |
| // OmitEmptyMatchCase implements APIRule interface. |
| // "omitempty" must appear verbatim (no case variants). |
| type OmitEmptyMatchCase struct{} |
| |
| func (n *OmitEmptyMatchCase) Name() string { |
| return "omitempty_match_case" |
| } |
| |
| func (n *OmitEmptyMatchCase) Validate(t *types.Type) ([]string, error) { |
| fields := make([]string, 0) |
| |
| // Only validate struct type and ignore the rest |
| switch t.Kind { |
| case types.Struct: |
| for _, m := range t.Members { |
| goName := m.Name |
| jsonTag, ok := reflect.StructTag(m.Tags).Lookup("json") |
| if !ok { |
| continue |
| } |
| |
| parts := strings.Split(jsonTag, ",") |
| if len(parts) < 2 { |
| // no tags other than name |
| continue |
| } |
| if parts[0] == "-" { |
| // not serialized |
| continue |
| } |
| for _, part := range parts[1:] { |
| if strings.EqualFold(part, "omitempty") && part != "omitempty" { |
| fields = append(fields, goName) |
| } |
| } |
| } |
| } |
| return fields, nil |
| } |