Golang GroupVersion.Empty方法代碼示例

// OriginSwaggerSchema returns a swagger API doc for an Origin schema under the /oapi prefix.
func (f *Factory) OriginSwaggerSchema(client *restclient.RESTClient, version unversioned.GroupVersion) (*swagger.ApiDeclaration, error) {
	if version.Empty() {
		return nil, fmt.Errorf("groupVersion cannot be empty")
	}
	body, err := client.Get().AbsPath("/").Suffix("swaggerapi", "oapi", version.Version).Do().Raw()
	if err != nil {
		return nil, err
	}
	var schema swagger.ApiDeclaration
	err = json.Unmarshal(body, &schema)
	if err != nil {
		return nil, fmt.Errorf("got '%s': %v", string(body), err)
	}
	return &schema, nil
}

// SwaggerSchema retrieves and parses the swagger API schema the server supports.
func (d *DiscoveryClient) SwaggerSchema(version unversioned.GroupVersion) (*swagger.ApiDeclaration, error) {
	if version.Empty() {
		return nil, fmt.Errorf("groupVersion cannot be empty")
	}

	groupList, err := d.ServerGroups()
	if err != nil {
		return nil, err
	}
	groupVersions := unversioned.ExtractGroupVersions(groupList)
	// This check also takes care the case that kubectl is newer than the running endpoint
	if stringDoesntExistIn(version.String(), groupVersions) {
		return nil, fmt.Errorf("API version: %v is not supported by the server. Use one of: %v", version, groupVersions)
	}
	var path string
	if len(d.LegacyPrefix) > 0 && version == v1.SchemeGroupVersion {
		path = "/swaggerapi" + d.LegacyPrefix + "/" + version.Version
	} else {
		path = "/swaggerapi/apis/" + version.Group + "/" + version.Version
	}

	body, err := d.restClient.Get().AbsPath(path).Do().Raw()
	if err != nil {
		return nil, err
	}
	var schema swagger.ApiDeclaration
	err = json.Unmarshal(body, &schema)
	if err != nil {
		return nil, fmt.Errorf("got '%s': %v", string(body), err)
	}
	return &schema, nil
}

// convertItemsForDisplay returns a new list that contains parallel elements that have been converted to the most preferred external version
func convertItemsForDisplay(objs []runtime.Object, preferredVersions ...unversioned.GroupVersion) ([]runtime.Object, error) {
	ret := []runtime.Object{}

	for i := range objs {
		obj := objs[i]
		kind, _, err := kapi.Scheme.ObjectKind(obj)
		if err != nil {
			return nil, err
		}
		groupMeta, err := registered.Group(kind.Group)
		if err != nil {
			return nil, err
		}

		requestedVersion := unversioned.GroupVersion{}
		for _, preferredVersion := range preferredVersions {
			if preferredVersion.Group == kind.Group {
				requestedVersion = preferredVersion
				break
			}
		}

		actualOutputVersion := unversioned.GroupVersion{}
		for _, externalVersion := range groupMeta.GroupVersions {
			if externalVersion == requestedVersion {
				actualOutputVersion = externalVersion
				break
			}
			if actualOutputVersion.Empty() {
				actualOutputVersion = externalVersion
			}
		}

		convertedObject, err := kapi.Scheme.ConvertToVersion(obj, actualOutputVersion)
		if err != nil {
			return nil, err
		}

		ret = append(ret, convertedObject)
	}

	return ret, nil
}

// AsVersionedObjects converts a list of infos into versioned objects. The provided
// version will be preferred as the conversion target, but the Object's mapping version will be
// used if that version is not present.
func AsVersionedObjects(infos []*Info, version unversioned.GroupVersion, encoder runtime.Encoder) ([]runtime.Object, error) {
	objects := []runtime.Object{}
	for _, info := range infos {
		if info.Object == nil {
			continue
		}

		// TODO: use info.VersionedObject as the value?
		switch obj := info.Object.(type) {
		case *extensions.ThirdPartyResourceData:
			objects = append(objects, &runtime.Unknown{Raw: obj.Data})
			continue
		}

		// objects that are not part of api.Scheme must be converted to JSON
		// TODO: convert to map[string]interface{}, attach to runtime.Unknown?
		if !version.Empty() {
			if _, _, err := api.Scheme.ObjectKinds(info.Object); runtime.IsNotRegisteredError(err) {
				// TODO: ideally this would encode to version, but we don't expose multiple codecs here.
				data, err := runtime.Encode(encoder, info.Object)
				if err != nil {
					return nil, err
				}
				// TODO: Set ContentEncoding and ContentType.
				objects = append(objects, &runtime.Unknown{Raw: data})
				continue
			}
		}

		converted, err := TryConvert(info.Mapping.ObjectConvertor, info.Object, version, info.Mapping.GroupVersionKind.GroupVersion())
		if err != nil {
			return nil, err
		}
		objects = append(objects, converted)
	}
	return objects, nil
}