Golang GroupVersionKind.IsEmpty方法代碼示例

func getRequestOptions(req *restful.Request, scope RequestScope, internalKind, externalKind unversioned.GroupVersionKind, subpath bool, subpathKey string) (runtime.Object, error) {
	if internalKind.IsEmpty() {
		return nil, nil
	}

	query := req.Request.URL.Query()
	if subpath {
		newQuery := make(url.Values)
		for k, v := range query {
			newQuery[k] = v
		}
		newQuery[subpathKey] = []string{req.PathParameter("path")}
		query = newQuery
	}

	versioned, err := scope.Creater.New(externalKind)
	if err != nil {
		return nil, err
	}

	if err := scope.Codec.DecodeParametersInto(query, versioned); err != nil {
		return nil, errors.NewBadRequest(err.Error())
	}
	out, err := scope.Convertor.ConvertToVersion(versioned, internalKind.GroupVersion().String())
	if err != nil {
		// programmer error
		return nil, err
	}
	return out, nil
}

// getResourceKind returns the external group version kind registered for the given storage
// object. If the storage object is a subresource and has an override supplied for it, it returns
// the group version kind supplied in the override.
func (a *APIInstaller) getResourceKind(path string, storage rest.Storage) (unversioned.GroupVersionKind, error) {
	if fqKindToRegister, ok := a.group.SubresourceGroupVersionKind[path]; ok {
		return fqKindToRegister, nil
	}

	object := storage.New()
	fqKinds, err := a.group.Typer.ObjectKinds(object)
	if err != nil {
		return unversioned.GroupVersionKind{}, err
	}

	// a given go type can have multiple potential fully qualified kinds.  Find the one that corresponds with the group
	// we're trying to register here
	fqKindToRegister := unversioned.GroupVersionKind{}
	for _, fqKind := range fqKinds {
		if fqKind.Group == a.group.GroupVersion.Group {
			fqKindToRegister = a.group.GroupVersion.WithKind(fqKind.Kind)
			break
		}

		// TODO This keeps it doing what it was doing before, but it doesn't feel right.
		if fqKind.Group == extensions.GroupName && fqKind.Kind == "ThirdPartyResourceData" {
			fqKindToRegister = a.group.GroupVersion.WithKind(fqKind.Kind)
		}
	}
	if fqKindToRegister.IsEmpty() {
		return unversioned.GroupVersionKind{}, fmt.Errorf("unable to locate fully qualified kind for %v: found %v when registering for %v", reflect.TypeOf(object), fqKinds, a.group.GroupVersion)
	}
	return fqKindToRegister, nil
}

// RunExplain executes the appropriate steps to print a model's documentation
func RunExplain(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []string) error {
	if len(args) != 1 {
		return cmdutil.UsageError(cmd, "We accept only this format: explain RESOURCE")
	}

	recursive := cmdutil.GetFlagBool(cmd, "recursive")
	apiVersionString := cmdutil.GetFlagString(cmd, "api-version")
	apiVersion := unversioned.GroupVersion{}

	mapper, _ := f.Object()
	// TODO: After we figured out the new syntax to separate group and resource, allow
	// the users to use it in explain (kubectl explain <group><syntax><resource>).
	// Refer to issue #16039 for why we do this. Refer to PR #15808 that used "/" syntax.
	inModel, fieldsPath, err := kubectl.SplitAndParseResourceRequest(args[0], mapper)
	if err != nil {
		return err
	}

	// TODO: We should deduce the group for a resource by discovering the supported resources at server.
	fullySpecifiedGVR, groupResource := unversioned.ParseResourceArg(inModel)
	gvk := unversioned.GroupVersionKind{}
	if fullySpecifiedGVR != nil {
		gvk, _ = mapper.KindFor(*fullySpecifiedGVR)
	}
	if gvk.IsEmpty() {
		gvk, err = mapper.KindFor(groupResource.WithVersion(""))
		if err != nil {
			return err
		}
	}

	if len(apiVersionString) == 0 {
		groupMeta, err := registered.Group(gvk.Group)
		if err != nil {
			return err
		}
		apiVersion = groupMeta.GroupVersion

	} else {
		apiVersion, err = unversioned.ParseGroupVersion(apiVersionString)
		if err != nil {
			return nil
		}
	}

	schema, err := f.SwaggerSchema(apiVersion.WithKind(gvk.Kind))
	if err != nil {
		return err
	}

	return kubectl.PrintModelDescription(inModel, fieldsPath, out, schema, recursive)
}

// mappingFor returns the RESTMapping for the Kind referenced by the resource.
// prefers a fully specified GroupVersionResource match.  If we don't have one match on GroupResource
func (b *Builder) mappingFor(resourceArg string) (*meta.RESTMapping, error) {
	fullySpecifiedGVR, groupResource := unversioned.ParseResourceArg(resourceArg)
	gvk := unversioned.GroupVersionKind{}
	if fullySpecifiedGVR != nil {
		gvk, _ = b.mapper.KindFor(*fullySpecifiedGVR)
	}
	if gvk.IsEmpty() {
		var err error
		gvk, err = b.mapper.KindFor(groupResource.WithVersion(""))
		if err != nil {
			return nil, err
		}
	}

	return b.mapper.RESTMapping(gvk.GroupKind(), gvk.Version)
}

func (a *APIInstaller) registerResourceHandlers(path string, storage rest.Storage, ws *restful.WebService, proxyHandler http.Handler) (*unversioned.APIResource, error) {
	admit := a.group.Admit
	context := a.group.Context

	optionsExternalVersion := a.group.GroupVersion
	if a.group.OptionsExternalVersion != nil {
		optionsExternalVersion = *a.group.OptionsExternalVersion
	}

	var resource, subresource string
	switch parts := strings.Split(path, "/"); len(parts) {
	case 2:
		resource, subresource = parts[0], parts[1]
	case 1:
		resource = parts[0]
	default:
		// TODO: support deeper paths
		return nil, fmt.Errorf("api_installer allows only one or two segment paths (resource or resource/subresource)")
	}
	hasSubresource := len(subresource) > 0

	object := storage.New()
	fqKinds, err := a.group.Typer.ObjectKinds(object)
	if err != nil {
		return nil, err
	}
	// a given go type can have multiple potential fully qualified kinds.  Find the one that corresponds with the group
	// we're trying to register here
	fqKindToRegister := unversioned.GroupVersionKind{}
	for _, fqKind := range fqKinds {
		if fqKind.Group == a.group.GroupVersion.Group {
			fqKindToRegister = fqKind
			break
		}

		// TODO This keeps it doing what it was doing before, but it doesn't feel right.
		if fqKind.Group == extensions.GroupName && fqKind.Kind == "ThirdPartyResourceData" {
			fqKindToRegister = fqKind
			fqKindToRegister.Group = a.group.GroupVersion.Group
			fqKindToRegister.Version = a.group.GroupVersion.Version
		}
	}

	if fqKindToRegister.IsEmpty() {
		return nil, fmt.Errorf("unable to locate fully qualified kind for %v: found %v when registering for %v", reflect.TypeOf(object), fqKinds, a.group.GroupVersion)
	}
	kind := fqKindToRegister.Kind

	versionedPtr, err := a.group.Creater.New(a.group.GroupVersion.WithKind(kind))
	if err != nil {
		return nil, err
	}
	versionedObject := indirectArbitraryPointer(versionedPtr)

	mapping, err := a.group.Mapper.RESTMapping(fqKindToRegister.GroupKind(), a.group.GroupVersion.Version)
	if err != nil {
		return nil, err
	}

	// subresources must have parent resources, and follow the namespacing rules of their parent
	if hasSubresource {
		parentStorage, ok := a.group.Storage[resource]
		if !ok {
			return nil, fmt.Errorf("subresources can only be declared when the parent is also registered: %s needs %s", path, resource)
		}
		parentObject := parentStorage.New()

		parentFQKinds, err := a.group.Typer.ObjectKinds(parentObject)
		if err != nil {
			return nil, err
		}
		// a given go type can have multiple potential fully qualified kinds.  Find the one that corresponds with the group
		// we're trying to register here
		parentFQKindToRegister := unversioned.GroupVersionKind{}
		for _, fqKind := range parentFQKinds {
			if fqKind.Group == a.group.GroupVersion.Group {
				parentFQKindToRegister = fqKind
				break
			}
		}
		if parentFQKindToRegister.IsEmpty() {
			return nil, fmt.Errorf("unable to locate fully qualified kind for %v: found %v when registering for %v", reflect.TypeOf(object), fqKinds, a.group.GroupVersion)
		}

		parentMapping, err := a.group.Mapper.RESTMapping(parentFQKindToRegister.GroupKind(), a.group.GroupVersion.Version)
		if err != nil {
			return nil, err
		}
		mapping.Scope = parentMapping.Scope
	}

	// what verbs are supported by the storage, used to know what verbs we support per path
	creater, isCreater := storage.(rest.Creater)
	namedCreater, isNamedCreater := storage.(rest.NamedCreater)
	lister, isLister := storage.(rest.Lister)
	getter, isGetter := storage.(rest.Getter)
	getterWithOptions, isGetterWithOptions := storage.(rest.GetterWithOptions)
	deleter, isDeleter := storage.(rest.Deleter)
	gracefulDeleter, isGracefulDeleter := storage.(rest.GracefulDeleter)
	collectionDeleter, isCollectionDeleter := storage.(rest.CollectionDeleter)
//.........這裏部分代碼省略.........