97 lines
2.7 KiB
Go
97 lines
2.7 KiB
Go
/*
|
|
Copyright 2014 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 meta
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"k8s.io/apimachinery/pkg/runtime/schema"
|
|
utilerrors "k8s.io/apimachinery/pkg/util/errors"
|
|
)
|
|
|
|
// FirstHitRESTMapper is a wrapper for multiple RESTMappers which returns the
|
|
// first successful result for the singular requests
|
|
type FirstHitRESTMapper struct {
|
|
MultiRESTMapper
|
|
}
|
|
|
|
func (m FirstHitRESTMapper) String() string {
|
|
return fmt.Sprintf("FirstHitRESTMapper{\n\t%v\n}", m.MultiRESTMapper)
|
|
}
|
|
|
|
func (m FirstHitRESTMapper) ResourceFor(resource schema.GroupVersionResource) (schema.GroupVersionResource, error) {
|
|
errors := []error{}
|
|
for _, t := range m.MultiRESTMapper {
|
|
ret, err := t.ResourceFor(resource)
|
|
if err == nil {
|
|
return ret, nil
|
|
}
|
|
errors = append(errors, err)
|
|
}
|
|
|
|
return schema.GroupVersionResource{}, collapseAggregateErrors(errors)
|
|
}
|
|
|
|
func (m FirstHitRESTMapper) KindFor(resource schema.GroupVersionResource) (schema.GroupVersionKind, error) {
|
|
errors := []error{}
|
|
for _, t := range m.MultiRESTMapper {
|
|
ret, err := t.KindFor(resource)
|
|
if err == nil {
|
|
return ret, nil
|
|
}
|
|
errors = append(errors, err)
|
|
}
|
|
|
|
return schema.GroupVersionKind{}, collapseAggregateErrors(errors)
|
|
}
|
|
|
|
// RESTMapping provides the REST mapping for the resource based on the
|
|
// kind and version. This implementation supports multiple REST schemas and
|
|
// return the first match.
|
|
func (m FirstHitRESTMapper) RESTMapping(gk schema.GroupKind, versions ...string) (*RESTMapping, error) {
|
|
errors := []error{}
|
|
for _, t := range m.MultiRESTMapper {
|
|
ret, err := t.RESTMapping(gk, versions...)
|
|
if err == nil {
|
|
return ret, nil
|
|
}
|
|
errors = append(errors, err)
|
|
}
|
|
|
|
return nil, collapseAggregateErrors(errors)
|
|
}
|
|
|
|
// collapseAggregateErrors returns the minimal errors. it handles empty as nil, handles one item in a list
|
|
// by returning the item, and collapses all NoMatchErrors to a single one (since they should all be the same)
|
|
func collapseAggregateErrors(errors []error) error {
|
|
if len(errors) == 0 {
|
|
return nil
|
|
}
|
|
if len(errors) == 1 {
|
|
return errors[0]
|
|
}
|
|
|
|
allNoMatchErrors := true
|
|
for _, err := range errors {
|
|
allNoMatchErrors = allNoMatchErrors && IsNoMatchError(err)
|
|
}
|
|
if allNoMatchErrors {
|
|
return errors[0]
|
|
}
|
|
|
|
return utilerrors.NewAggregate(errors)
|
|
}
|