mirror of
https://github.com/kubernetes/client-go.git
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9fa87b55f6
Delays the error until the first call and then preserves it for others. More closely matches the intent of the Object() calls. Loaders are now lazy and don't need to return errors directly. Sets the stage for collapsing unstructured and structured builders together. Kubernetes-commit: e298aa39c3de8ad1059861b7f78d62005ca87f88
96 lines
3.2 KiB
Go
96 lines
3.2 KiB
Go
/*
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Copyright 2016 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 discovery
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import (
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"reflect"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/schema"
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)
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// UnstructuredObjectTyper provides a runtime.ObjectTyper implementation for
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// runtime.Unstructured object based on discovery information.
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type UnstructuredObjectTyper struct {
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registered map[schema.GroupVersionKind]bool
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typers []runtime.ObjectTyper
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}
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// NewUnstructuredObjectTyper returns a runtime.ObjectTyper for
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// unstructured objects based on discovery information. It accepts a list of fallback typers
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// for handling objects that are not runtime.Unstructured. It does not delegate the Recognizes
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// check, only ObjectKinds.
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func NewUnstructuredObjectTyper(groupResources []*APIGroupResources, typers ...runtime.ObjectTyper) *UnstructuredObjectTyper {
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dot := &UnstructuredObjectTyper{
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registered: make(map[schema.GroupVersionKind]bool),
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typers: typers,
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}
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for _, group := range groupResources {
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for _, discoveryVersion := range group.Group.Versions {
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resources, ok := group.VersionedResources[discoveryVersion.Version]
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if !ok {
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continue
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}
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gv := schema.GroupVersion{Group: group.Group.Name, Version: discoveryVersion.Version}
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for _, resource := range resources {
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dot.registered[gv.WithKind(resource.Kind)] = true
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}
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}
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}
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return dot
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}
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// ObjectKinds returns a slice of one element with the group,version,kind of the
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// provided object, or an error if the object is not runtime.Unstructured or
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// has no group,version,kind information. unversionedType will always be false
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// because runtime.Unstructured object should always have group,version,kind
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// information set.
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func (d *UnstructuredObjectTyper) ObjectKinds(obj runtime.Object) (gvks []schema.GroupVersionKind, unversionedType bool, err error) {
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if _, ok := obj.(runtime.Unstructured); ok {
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gvk := obj.GetObjectKind().GroupVersionKind()
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if len(gvk.Kind) == 0 {
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return nil, false, runtime.NewMissingKindErr("object has no kind field ")
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}
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if len(gvk.Version) == 0 {
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return nil, false, runtime.NewMissingVersionErr("object has no apiVersion field")
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}
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return []schema.GroupVersionKind{gvk}, false, nil
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}
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var lastErr error
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for _, typer := range d.typers {
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gvks, unversioned, err := typer.ObjectKinds(obj)
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if err != nil {
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lastErr = err
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continue
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}
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return gvks, unversioned, nil
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}
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if lastErr == nil {
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lastErr = runtime.NewNotRegisteredErrForType(reflect.TypeOf(obj))
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}
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return nil, false, lastErr
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}
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// Recognizes returns true if the provided group,version,kind was in the
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// discovery information.
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func (d *UnstructuredObjectTyper) Recognizes(gvk schema.GroupVersionKind) bool {
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return d.registered[gvk]
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}
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var _ runtime.ObjectTyper = &UnstructuredObjectTyper{}
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