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82 lines
2.3 KiB
Go
82 lines
2.3 KiB
Go
/*
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Copyright 2017 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 explain
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import "k8s.io/kube-openapi/pkg/util/proto"
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// indentPerLevel is the level of indentation for each field recursion.
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const indentPerLevel = 3
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// recursiveFieldsPrinter recursively prints all the fields for a given
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// schema.
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type recursiveFieldsPrinter struct {
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Writer *Formatter
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Error error
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}
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var _ proto.SchemaVisitor = &recursiveFieldsPrinter{}
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var _ fieldsPrinter = &recursiveFieldsPrinter{}
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var visitedReferences = map[string]struct{}{}
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// VisitArray is just a passthrough.
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func (f *recursiveFieldsPrinter) VisitArray(a *proto.Array) {
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a.SubType.Accept(f)
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}
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// VisitKind prints all its fields with their type, and then recurses
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// inside each of these (pre-order).
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func (f *recursiveFieldsPrinter) VisitKind(k *proto.Kind) {
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for _, key := range k.Keys() {
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v := k.Fields[key]
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f.Writer.Write("%s\t<%s>", key, GetTypeName(v))
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subFields := &recursiveFieldsPrinter{
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Writer: f.Writer.Indent(indentPerLevel),
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}
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if err := subFields.PrintFields(v); err != nil {
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f.Error = err
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return
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}
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}
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}
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// VisitMap is just a passthrough.
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func (f *recursiveFieldsPrinter) VisitMap(m *proto.Map) {
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m.SubType.Accept(f)
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}
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// VisitPrimitive does nothing, since it doesn't have sub-fields.
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func (f *recursiveFieldsPrinter) VisitPrimitive(p *proto.Primitive) {
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// Nothing to do.
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}
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// VisitReference is just a passthrough.
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func (f *recursiveFieldsPrinter) VisitReference(r proto.Reference) {
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if _, ok := visitedReferences[r.Reference()]; ok {
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return
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}
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visitedReferences[r.Reference()] = struct{}{}
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r.SubSchema().Accept(f)
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delete(visitedReferences, r.Reference())
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}
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// PrintFields will recursively print all the fields for the given
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// schema.
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func (f *recursiveFieldsPrinter) PrintFields(schema proto.Schema) error {
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schema.Accept(f)
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return f.Error
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}
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