Matthias Andreas Benkard | 832a54e | 2019-01-29 09:27:38 +0100 | [diff] [blame] | 1 | /* |
| 2 | Copyright 2017 The Kubernetes Authors. |
| 3 | |
| 4 | Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | you may not use this file except in compliance with the License. |
| 6 | You may obtain a copy of the License at |
| 7 | |
| 8 | http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | |
| 10 | Unless required by applicable law or agreed to in writing, software |
| 11 | distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | See the License for the specific language governing permissions and |
| 14 | limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package generic |
| 18 | |
| 19 | import ( |
| 20 | "fmt" |
| 21 | |
| 22 | "k8s.io/apimachinery/pkg/runtime" |
| 23 | "k8s.io/apimachinery/pkg/runtime/schema" |
| 24 | ) |
| 25 | |
| 26 | // convertor converts objects to the desired version. |
| 27 | type convertor struct { |
| 28 | Scheme *runtime.Scheme |
| 29 | } |
| 30 | |
| 31 | // ConvertToGVK converts object to the desired gvk. |
| 32 | func (c *convertor) ConvertToGVK(obj runtime.Object, gvk schema.GroupVersionKind) (runtime.Object, error) { |
| 33 | // Unlike other resources, custom resources do not have internal version, so |
| 34 | // if obj is a custom resource, it should not need conversion. |
| 35 | if obj.GetObjectKind().GroupVersionKind() == gvk { |
| 36 | return obj, nil |
| 37 | } |
| 38 | out, err := c.Scheme.New(gvk) |
| 39 | if err != nil { |
| 40 | return nil, err |
| 41 | } |
| 42 | err = c.Scheme.Convert(obj, out, nil) |
| 43 | if err != nil { |
| 44 | return nil, err |
| 45 | } |
| 46 | return out, nil |
| 47 | } |
| 48 | |
| 49 | // Validate checks if the conversion has a scheme. |
| 50 | func (c *convertor) Validate() error { |
| 51 | if c.Scheme == nil { |
| 52 | return fmt.Errorf("the convertor requires a scheme") |
| 53 | } |
| 54 | return nil |
| 55 | } |