mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
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79 lines
2.4 KiB
Go
79 lines
2.4 KiB
Go
/*
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Copyright 2014 Google Inc. All rights reserved.
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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 api
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import (
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"errors"
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"fmt"
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"regexp"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api/meta"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/runtime"
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)
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// ErrNilObject indicates an error that the obj passed to GetReference is nil.
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var ErrNilObject = errors.New("Can't reference a nil object")
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var versionFromSelfLink = regexp.MustCompile("/api/([^/]*)/")
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// GetReference returns an ObjectReference which refers to the given
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// object, or an error if the object doesn't follow the conventions
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// that would allow this.
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func GetReference(obj runtime.Object) (*ObjectReference, error) {
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if obj == nil {
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return nil, ErrNilObject
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}
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if ref, ok := obj.(*ObjectReference); ok {
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// Don't make a reference to a reference.
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return ref, nil
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}
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meta, err := meta.Accessor(obj)
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if err != nil {
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return nil, err
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}
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_, kind, err := Scheme.ObjectVersionAndKind(obj)
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if err != nil {
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return nil, err
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}
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version := versionFromSelfLink.FindStringSubmatch(meta.SelfLink())
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if len(version) < 2 {
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return nil, fmt.Errorf("unexpected self link format: '%v'; got version '%v'", meta.SelfLink(), version)
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}
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return &ObjectReference{
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Kind: kind,
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APIVersion: version[1],
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Name: meta.Name(),
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Namespace: meta.Namespace(),
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UID: meta.UID(),
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ResourceVersion: meta.ResourceVersion(),
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}, nil
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}
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// GetPartialReference is exactly like GetReference, but allows you to set the FieldPath.
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func GetPartialReference(obj runtime.Object, fieldPath string) (*ObjectReference, error) {
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ref, err := GetReference(obj)
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if err != nil {
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return nil, err
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}
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ref.FieldPath = fieldPath
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return ref, nil
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}
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// IsAnAPIObject allows clients to preemptively get a reference to an API object and pass it to places that
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// intend only to get a reference to that object. This simplifies the event recording interface.
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func (*ObjectReference) IsAnAPIObject() {}
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