65 lines
1.5 KiB
Go
65 lines
1.5 KiB
Go
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/*
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Copyright 2018 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package rules
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import (
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"reflect"
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"strings"
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"k8s.io/gengo/types"
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)
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// OmitEmptyMatchCase implements APIRule interface.
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// "omitempty" must appear verbatim (no case variants).
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type OmitEmptyMatchCase struct{}
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func (n *OmitEmptyMatchCase) Name() string {
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return "omitempty_match_case"
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}
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func (n *OmitEmptyMatchCase) Validate(t *types.Type) ([]string, error) {
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fields := make([]string, 0)
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// Only validate struct type and ignore the rest
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switch t.Kind {
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case types.Struct:
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for _, m := range t.Members {
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goName := m.Name
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jsonTag, ok := reflect.StructTag(m.Tags).Lookup("json")
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if !ok {
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continue
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}
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parts := strings.Split(jsonTag, ",")
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if len(parts) < 2 {
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// no tags other than name
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continue
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}
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if parts[0] == "-" {
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// not serialized
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continue
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}
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for _, part := range parts[1:] {
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if strings.EqualFold(part, "omitempty") && part != "omitempty" {
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fields = append(fields, goName)
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}
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}
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}
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}
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return fields, nil
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}
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