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meta.go
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meta.go
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package meta
import (
"fmt"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/util/validation/field"
kapi "k8s.io/kubernetes/pkg/apis/core"
buildapi "github.com/openshift/origin/pkg/build/apis/build"
)
// ImageReferenceMutateFunc is passed a reference representing an image, and may alter
// the Name, Kind, and Namespace fields of the reference. If an error is returned the
// object may still be mutated under the covers.
type ImageReferenceMutateFunc func(ref *kapi.ObjectReference) error
type ImageReferenceMutator interface {
// Mutate invokes fn on every image reference in the object. If fn returns an error,
// a field.Error is added to the list to be returned. Mutate does not terminate early
// if errors are detected.
Mutate(fn ImageReferenceMutateFunc) field.ErrorList
}
var errNoImageMutator = fmt.Errorf("No list of images available for this object")
// GetImageReferenceMutator returns a mutator for the provided object, or an error if no
// such mutator is defined. Only references that are different between obj and old will
// be returned unless old is nil.
func GetImageReferenceMutator(obj, old runtime.Object) (ImageReferenceMutator, error) {
switch t := obj.(type) {
case *buildapi.Build:
if oldT, ok := old.(*buildapi.Build); ok && oldT != nil {
return &buildSpecMutator{spec: &t.Spec.CommonSpec, oldSpec: &oldT.Spec.CommonSpec, path: field.NewPath("spec")}, nil
}
return &buildSpecMutator{spec: &t.Spec.CommonSpec, path: field.NewPath("spec")}, nil
case *buildapi.BuildConfig:
if oldT, ok := old.(*buildapi.BuildConfig); ok && oldT != nil {
return &buildSpecMutator{spec: &t.Spec.CommonSpec, oldSpec: &oldT.Spec.CommonSpec, path: field.NewPath("spec")}, nil
}
return &buildSpecMutator{spec: &t.Spec.CommonSpec, path: field.NewPath("spec")}, nil
default:
if spec, path, err := GetPodSpec(obj); err == nil {
if old == nil {
return &podSpecMutator{spec: spec, path: path}, nil
}
oldSpec, _, err := GetPodSpec(old)
if err != nil {
return nil, fmt.Errorf("old and new pod spec objects were not of the same type %T != %T: %v", obj, old, err)
}
return &podSpecMutator{spec: spec, oldSpec: oldSpec, path: path}, nil
}
if spec, path, err := GetPodSpecV1(obj); err == nil {
if old == nil {
return &podSpecV1Mutator{spec: spec, path: path}, nil
}
oldSpec, _, err := GetPodSpecV1(old)
if err != nil {
return nil, fmt.Errorf("old and new pod spec objects were not of the same type %T != %T: %v", obj, old, err)
}
return &podSpecV1Mutator{spec: spec, oldSpec: oldSpec, path: path}, nil
}
return nil, errNoImageMutator
}
}
type pairwiseMutator struct {
newer ImageReferenceMutator
older ImageReferenceMutator
}
type AnnotationAccessor interface {
// Annotations returns a map representing annotations. Not mutable.
Annotations() map[string]string
// SetAnnotations sets representing annotations onto the object.
SetAnnotations(map[string]string)
// TemplateAnnotations returns a map representing annotations on a nested template in the object. Not mutable.
// If no template is present bool will be false.
TemplateAnnotations() (map[string]string, bool)
// SetTemplateAnnotations sets annotations on a nested template in the object.
// If no template is present bool will be false.
SetTemplateAnnotations(map[string]string) bool
}
type annotationsAccessor struct {
object metav1.Object
template metav1.Object
}
func (a annotationsAccessor) Annotations() map[string]string {
return a.object.GetAnnotations()
}
func (a annotationsAccessor) TemplateAnnotations() (map[string]string, bool) {
if a.template == nil {
return nil, false
}
return a.template.GetAnnotations(), true
}
func (a annotationsAccessor) SetAnnotations(annotations map[string]string) {
a.object.SetAnnotations(annotations)
}
func (a annotationsAccessor) SetTemplateAnnotations(annotations map[string]string) bool {
if a.template == nil {
return false
}
a.template.SetAnnotations(annotations)
return true
}
// GetAnnotationAccessor returns an accessor for the provided object or false if the object
// does not support accessing annotations.
func GetAnnotationAccessor(obj runtime.Object) (AnnotationAccessor, bool) {
switch t := obj.(type) {
case metav1.Object:
templateObject, _ := GetTemplateMetaObject(obj)
return annotationsAccessor{object: t, template: templateObject}, true
default:
return nil, false
}
}