// 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 MultiRESTMapper) RESTMapping(gk schema.GroupKind, versions ...string) (*RESTMapping, error) {
allMappings := []*RESTMapping{}
errors := []error{}
for _, t := range m {
currMapping, err := t.RESTMapping(gk, versions...)
// ignore "no match" errors, but any other error percolates back up
if IsNoMatchError(err) {
continue
}
if err != nil {
errors = append(errors, err)
continue
}
allMappings = append(allMappings, currMapping)
}
// if we got exactly one mapping, then use it even if other requested failed
if len(allMappings) == 1 {
return allMappings[0], nil
}
if len(allMappings) > 1 {
var kinds []schema.GroupVersionKind
for _, m := range allMappings {
kinds = append(kinds, m.GroupVersionKind)
}
return nil, &AmbiguousKindError{PartialKind: gk.WithVersion(""), MatchingKinds: kinds}
}
if len(errors) > 0 {
return nil, utilerrors.NewAggregate(errors)
}
return nil, &NoKindMatchError{PartialKind: gk.WithVersion("")}
}
func (m PriorityRESTMapper) RESTMapping(gk schema.GroupKind, versions ...string) (mapping *RESTMapping, err error) {
mappings, err := m.Delegate.RESTMappings(gk)
if err != nil {
return nil, err
}
// any versions the user provides take priority
priorities := m.KindPriority
if len(versions) > 0 {
priorities = make([]schema.GroupVersionKind, 0, len(m.KindPriority)+len(versions))
for _, version := range versions {
gv, err := schema.ParseGroupVersion(version)
if err != nil {
return nil, err
}
priorities = append(priorities, gv.WithKind(AnyKind))
}
priorities = append(priorities, m.KindPriority...)
}
remaining := append([]*RESTMapping{}, mappings...)
for _, pattern := range priorities {
var matching []*RESTMapping
for _, m := range remaining {
if kindMatches(pattern, m.GroupVersionKind) {
matching = append(matching, m)
}
}
switch len(matching) {
case 0:
// if you have no matches, then nothing matched this pattern just move to the next
continue
case 1:
// one match, return
return matching[0], nil
default:
// more than one match, use the matched hits as the list moving to the next pattern.
// this way you can have a series of selection criteria
remaining = matching
}
}
if len(remaining) == 1 {
return remaining[0], nil
}
var kinds []schema.GroupVersionKind
for _, m := range mappings {
kinds = append(kinds, m.GroupVersionKind)
}
return nil, &AmbiguousKindError{PartialKind: gk.WithVersion(""), MatchingKinds: kinds}
}
// RESTMappings returns the RESTMappings for the provided group kind in a rough internal preferred order. If no
// kind is found it will return a NoResourceMatchError.
func (m *DefaultRESTMapper) RESTMappings(gk schema.GroupKind) ([]*RESTMapping, error) {
// Use the default preferred versions
var mappings []*RESTMapping
for _, gv := range m.defaultGroupVersions {
if gv.Group != gk.Group {
continue
}
gvk := gk.WithVersion(gv.Version)
gvr, ok := m.kindToPluralResource[gvk]
if !ok {
continue
}
// Ensure we have a REST scope
scope, ok := m.kindToScope[gvk]
if !ok {
return nil, fmt.Errorf("the provided version %q and kind %q cannot be mapped to a supported scope", gvk.GroupVersion(), gvk.Kind)
}
interfaces, err := m.interfacesFunc(gvk.GroupVersion())
if err != nil {
return nil, fmt.Errorf("the provided version %q has no relevant versions: %v", gvk.GroupVersion().String(), err)
}
mappings = append(mappings, &RESTMapping{
Resource: gvr.Resource,
GroupVersionKind: gvk,
Scope: scope,
ObjectConvertor: interfaces.ObjectConvertor,
MetadataAccessor: interfaces.MetadataAccessor,
})
}
if len(mappings) == 0 {
return nil, &NoResourceMatchError{PartialResource: schema.GroupVersionResource{Group: gk.Group, Resource: gk.Kind}}
}
return mappings, nil
}
// RESTMappings returns all possible RESTMappings for the provided group kind, or an error
// if the type is not recognized.
func (m MultiRESTMapper) RESTMappings(gk schema.GroupKind, versions ...string) ([]*RESTMapping, error) {
var allMappings []*RESTMapping
var errors []error
for _, t := range m {
currMappings, err := t.RESTMappings(gk, versions...)
// ignore "no match" errors, but any other error percolates back up
if IsNoMatchError(err) {
continue
}
if err != nil {
errors = append(errors, err)
continue
}
allMappings = append(allMappings, currMappings...)
}
if len(errors) > 0 {
return nil, utilerrors.NewAggregate(errors)
}
if len(allMappings) == 0 {
return nil, &NoKindMatchError{PartialKind: gk.WithVersion("")}
}
return allMappings, nil
}
// RESTMapping returns a struct representing the resource path and conversion interfaces a
// RESTClient should use to operate on the provided group/kind in order of versions. If a version search
// order is not provided, the search order provided to DefaultRESTMapper will be used to resolve which
// version should be used to access the named group/kind.
// TODO: consider refactoring to use RESTMappings in a way that preserves version ordering and preference
func (m *DefaultRESTMapper) RESTMapping(gk schema.GroupKind, versions ...string) (*RESTMapping, error) {
// Pick an appropriate version
var gvk *schema.GroupVersionKind
hadVersion := false
for _, version := range versions {
if len(version) == 0 || version == runtime.APIVersionInternal {
continue
}
currGVK := gk.WithVersion(version)
hadVersion = true
if _, ok := m.kindToPluralResource[currGVK]; ok {
gvk = &currGVK
break
}
}
// Use the default preferred versions
if !hadVersion && (gvk == nil) {
for _, gv := range m.defaultGroupVersions {
if gv.Group != gk.Group {
continue
}
currGVK := gk.WithVersion(gv.Version)
if _, ok := m.kindToPluralResource[currGVK]; ok {
gvk = &currGVK
break
}
}
}
if gvk == nil {
return nil, &NoKindMatchError{PartialKind: gk.WithVersion("")}
}
// Ensure we have a REST mapping
resource, ok := m.kindToPluralResource[*gvk]
if !ok {
found := []schema.GroupVersion{}
for _, gv := range m.defaultGroupVersions {
if _, ok := m.kindToPluralResource[*gvk]; ok {
found = append(found, gv)
}
}
if len(found) > 0 {
return nil, fmt.Errorf("object with kind %q exists in versions %v, not %v", gvk.Kind, found, gvk.GroupVersion().String())
}
return nil, fmt.Errorf("the provided version %q and kind %q cannot be mapped to a supported object", gvk.GroupVersion().String(), gvk.Kind)
}
// Ensure we have a REST scope
scope, ok := m.kindToScope[*gvk]
if !ok {
return nil, fmt.Errorf("the provided version %q and kind %q cannot be mapped to a supported scope", gvk.GroupVersion().String(), gvk.Kind)
}
interfaces, err := m.interfacesFunc(gvk.GroupVersion())
if err != nil {
return nil, fmt.Errorf("the provided version %q has no relevant versions: %v", gvk.GroupVersion().String(), err)
}
retVal := &RESTMapping{
Resource: resource.Resource,
GroupVersionKind: *gvk,
Scope: scope,
ObjectConvertor: interfaces.ObjectConvertor,
MetadataAccessor: interfaces.MetadataAccessor,
}
return retVal, nil
}