diff options
Diffstat (limited to 'vendor/k8s.io/apimachinery/pkg/api/meta/firsthit_restmapper.go')
-rw-r--r-- | vendor/k8s.io/apimachinery/pkg/api/meta/firsthit_restmapper.go | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/vendor/k8s.io/apimachinery/pkg/api/meta/firsthit_restmapper.go b/vendor/k8s.io/apimachinery/pkg/api/meta/firsthit_restmapper.go new file mode 100644 index 000000000..fd2210022 --- /dev/null +++ b/vendor/k8s.io/apimachinery/pkg/api/meta/firsthit_restmapper.go @@ -0,0 +1,97 @@ +/* +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) +} |