| /* |
| Copyright 2016 The Kubernetes Authors. |
| |
| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
| You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| */ |
| |
| package storage |
| |
| import ( |
| "fmt" |
| |
| "k8s.io/apimachinery/pkg/runtime" |
| "k8s.io/apimachinery/pkg/runtime/schema" |
| ) |
| |
| type ResourceEncodingConfig interface { |
| // StorageEncoding returns the serialization format for the resource. |
| // TODO this should actually return a GroupVersionKind since you can logically have multiple "matching" Kinds |
| // For now, it returns just the GroupVersion for consistency with old behavior |
| StorageEncodingFor(schema.GroupResource) (schema.GroupVersion, error) |
| |
| // InMemoryEncodingFor returns the groupVersion for the in memory representation the storage should convert to. |
| InMemoryEncodingFor(schema.GroupResource) (schema.GroupVersion, error) |
| } |
| |
| type DefaultResourceEncodingConfig struct { |
| // resources records the overriding encoding configs for individual resources. |
| resources map[schema.GroupResource]*OverridingResourceEncoding |
| scheme *runtime.Scheme |
| } |
| |
| type OverridingResourceEncoding struct { |
| ExternalResourceEncoding schema.GroupVersion |
| InternalResourceEncoding schema.GroupVersion |
| } |
| |
| var _ ResourceEncodingConfig = &DefaultResourceEncodingConfig{} |
| |
| func NewDefaultResourceEncodingConfig(scheme *runtime.Scheme) *DefaultResourceEncodingConfig { |
| return &DefaultResourceEncodingConfig{resources: map[schema.GroupResource]*OverridingResourceEncoding{}, scheme: scheme} |
| } |
| |
| func (o *DefaultResourceEncodingConfig) SetResourceEncoding(resourceBeingStored schema.GroupResource, externalEncodingVersion, internalVersion schema.GroupVersion) { |
| o.resources[resourceBeingStored] = &OverridingResourceEncoding{ |
| ExternalResourceEncoding: externalEncodingVersion, |
| InternalResourceEncoding: internalVersion, |
| } |
| } |
| |
| func (o *DefaultResourceEncodingConfig) StorageEncodingFor(resource schema.GroupResource) (schema.GroupVersion, error) { |
| if !o.scheme.IsGroupRegistered(resource.Group) { |
| return schema.GroupVersion{}, fmt.Errorf("group %q is not registered in scheme", resource.Group) |
| } |
| |
| resourceOverride, resourceExists := o.resources[resource] |
| if resourceExists { |
| return resourceOverride.ExternalResourceEncoding, nil |
| } |
| |
| // return the most preferred external version for the group |
| return o.scheme.PrioritizedVersionsForGroup(resource.Group)[0], nil |
| } |
| |
| func (o *DefaultResourceEncodingConfig) InMemoryEncodingFor(resource schema.GroupResource) (schema.GroupVersion, error) { |
| if !o.scheme.IsGroupRegistered(resource.Group) { |
| return schema.GroupVersion{}, fmt.Errorf("group %q is not registered in scheme", resource.Group) |
| } |
| |
| resourceOverride, resourceExists := o.resources[resource] |
| if resourceExists { |
| return resourceOverride.InternalResourceEncoding, nil |
| } |
| return schema.GroupVersion{Group: resource.Group, Version: runtime.APIVersionInternal}, nil |
| } |