// Cloner knows how to copy one type to another.
type Cloner struct {
	// Map from the type to a function which can do the deep copy.
	deepCopyFuncs          map[reflect.Type]reflect.Value
	generatedDeepCopyFuncs map[reflect.Type]func(in interface{}, out interface{}, c *Cloner) error
}

//***定义Scheme***//
var Scheme = runtime.NewScheme()

func NewDefaultRESTMapperFromScheme(defaultGroupVersions []unversioned.GroupVersion, interfacesFunc meta.VersionInterfacesFunc,
	importPathPrefix string, ignoredKinds, rootScoped sets.String, scheme *runtime.Scheme) *meta.DefaultRESTMapper {
	mapper := meta.NewDefaultRESTMapper(defaultGroupVersions, interfacesFunc)
	// enumerate all supported versions, get the kinds, and register with the mapper how to address
	// our resources.
	for _, gv := range defaultGroupVersions {
		for kind, oType := range scheme.KnownTypes(gv) {
			gvk := gv.WithKind(kind)
			// TODO: Remove import path check.
			// We check the import path because we currently stuff both "api" and "extensions" objects
			// into the same group within Scheme since Scheme has no notion of groups yet.
			if !strings.Contains(oType.PkgPath(), importPathPrefix) || ignoredKinds.Has(kind) {
				continue
			}
			scope := meta.RESTScopeNamespace
			//***/pkg/api/install/install.go中定义***//
			if rootScoped.Has(kind) {
				scope = meta.RESTScopeRoot
			}
			mapper.Add(gvk, scope)
		}
	}
	return mapper
}

// RESTMapper allows clients to map resources to kind, and map kind and version
// to interfaces for manipulating those objects. It is primarily intended for
// consumers of Kubernetes compatible REST APIs as defined in docs/devel/api-conventions.md.
//
// The Kubernetes API provides versioned resources and object kinds which are scoped
// to API groups. In other words, kinds and resources should not be assumed to be
// unique across groups.
//
// TODO: split into sub-interfaces
type RESTMapper interface {
	// KindFor takes a partial resource and returns the single match.  Returns an error if there are multiple matches
	KindFor(resource unversioned.GroupVersionResource) (unversioned.GroupVersionKind, error)
	// KindsFor takes a partial resource and returns the list of potential kinds in priority order
	KindsFor(resource unversioned.GroupVersionResource) ([]unversioned.GroupVersionKind, error)
	// ResourceFor takes a partial resource and returns the single match.  Returns an error if there are multiple matches
	ResourceFor(input unversioned.GroupVersionResource) (unversioned.GroupVersionResource, error)
	// ResourcesFor takes a partial resource and returns the list of potential resource in priority order
	ResourcesFor(input unversioned.GroupVersionResource) ([]unversioned.GroupVersionResource, error)
	// RESTMapping identifies a preferred resource mapping for the provided group kind.
	RESTMapping(gk unversioned.GroupKind, versions ...string) (*RESTMapping, error)
	// RESTMappings returns all resource mappings for the provided group kind.
	RESTMappings(gk unversioned.GroupKind) ([]*RESTMapping, error)
	AliasesForResource(resource string) ([]string, bool)
	ResourceSingularizer(resource string) (singular string, err error)
}