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/*
Copyright 2017 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 flunder
import (
"fmt"
"k8s.io/apimachinery/pkg/fields"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/util/validation/field"
"k8s.io/apiserver/pkg/registry/generic"
"k8s.io/apiserver/pkg/storage"
"k8s.io/apiserver/pkg/storage/names"
genericapirequest "k8s.io/apiserver/pkg/endpoints/request"
"k8s.io/sample-apiserver/pkg/apis/wardle"
)
// NewStrategy creates and returns a flunderStrategy instance
func NewStrategy(typer runtime.ObjectTyper) flunderStrategy {
return flunderStrategy{typer, names.SimpleNameGenerator}
}
// GetAttrs returns labels.Set, fields.Set, the presence of Initializers if any
// and error in case the given runtime.Object is not a Flunder
func GetAttrs(obj runtime.Object) (labels.Set, fields.Set, bool, error) {
apiserver, ok := obj.(*wardle.Flunder)
if !ok {
return nil, nil, false, fmt.Errorf("given object is not a Flunder")
}
return labels.Set(apiserver.ObjectMeta.Labels), SelectableFields(apiserver), apiserver.Initializers != nil, nil
}
// MatchFlunder is the filter used by the generic etcd backend to watch events
// from etcd to clients of the apiserver only interested in specific labels/fields.
func MatchFlunder(label labels.Selector, field fields.Selector) storage.SelectionPredicate {
return storage.SelectionPredicate{
Label: label,
Field: field,
GetAttrs: GetAttrs,
}
}
// SelectableFields returns a field set that represents the object.
func SelectableFields(obj *wardle.Flunder) fields.Set {
return generic.ObjectMetaFieldsSet(&obj.ObjectMeta, true)
}
type flunderStrategy struct {
runtime.ObjectTyper
names.NameGenerator
}
func (flunderStrategy) NamespaceScoped() bool {
return true
}
func (flunderStrategy) PrepareForCreate(ctx genericapirequest.Context, obj runtime.Object) {
}
func (flunderStrategy) PrepareForUpdate(ctx genericapirequest.Context, obj, old runtime.Object) {
}
func (flunderStrategy) Validate(ctx genericapirequest.Context, obj runtime.Object) field.ErrorList {
return field.ErrorList{}
}
func (flunderStrategy) AllowCreateOnUpdate() bool {
return false
}
func (flunderStrategy) AllowUnconditionalUpdate() bool {
return false
}
func (flunderStrategy) Canonicalize(obj runtime.Object) {
}
func (flunderStrategy) ValidateUpdate(ctx genericapirequest.Context, obj, old runtime.Object) field.ErrorList {
return field.ErrorList{}
}
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