Golang RESTMapper.KindFor方法代碼示例

// ObjectReaction returns a ReactionFunc that takes a generic action string of the form
// <verb>-<resource> or <verb>-<subresource>-<resource> and attempts to return a runtime
// Object or error that matches the requested action. For instance, list-replicationControllers
// should attempt to return a list of replication controllers. This method delegates to the
// ObjectRetriever interface to satisfy retrieval of lists or retrieval of single items.
// TODO: add support for sub resources
func ObjectReaction(o ObjectRetriever, mapper meta.RESTMapper) ReactionFunc {
	return func(action Action) (bool, runtime.Object, error) {
		resource := action.GetResource()
		kind, err := mapper.KindFor(resource)
		// This is a temporary fix. Because there is no internal resource, so
		// the caller has no way to express that it expects to get an internal
		// kind back. A more proper fix will be directly specify the Kind when
		// build the action.
		kind.Version = resource.Version
		if err != nil {
			return false, nil, fmt.Errorf("unrecognized action %s: %v", action.GetResource(), err)
		}

		// TODO: have mapper return a Kind for a subresource?
		switch castAction := action.(type) {
		case ListAction:
			kind.Kind += "List"
			resource, err := o.Kind(kind, "")
			return true, resource, err

		case GetAction:
			resource, err := o.Kind(kind, castAction.GetName())
			return true, resource, err

		case DeleteAction:
			resource, err := o.Kind(kind, castAction.GetName())
			return true, resource, err

		case CreateAction:
			accessor, err := meta.Accessor(castAction.GetObject())
			if err != nil {
				return true, nil, err
			}
			resource, err := o.Kind(kind, accessor.GetName())
			return true, resource, err

		case UpdateAction:
			accessor, err := meta.Accessor(castAction.GetObject())
			if err != nil {
				return true, nil, err
			}
			resource, err := o.Kind(kind, accessor.GetName())
			return true, resource, err

		default:
			return false, nil, fmt.Errorf("no reaction implemented for %s", action)
		}
	}
}

// ObjectReaction returns a ReactionFunc that takes a generic action string of the form
// <verb>-<resource> or <verb>-<subresource>-<resource> and attempts to return a runtime
// Object or error that matches the requested action. For instance, list-replicationControllers
// should attempt to return a list of replication controllers. This method delegates to the
// ObjectRetriever interface to satisfy retrieval of lists or retrieval of single items.
// TODO: add support for sub resources
func ObjectReaction(o ObjectRetriever, mapper meta.RESTMapper) ReactionFunc {

	return func(action Action) (bool, runtime.Object, error) {
		gvk, err := mapper.KindFor(action.GetResource())
		if err != nil {
			return false, nil, fmt.Errorf("unrecognized action %s: %v", action.GetResource(), err)
		}

		// TODO: have mapper return a Kind for a subresource?
		switch castAction := action.(type) {
		case ListAction:
			gvk.Kind += "List"
			resource, err := o.Kind(gvk, "")
			return true, resource, err

		case GetAction:
			resource, err := o.Kind(gvk, castAction.GetName())
			return true, resource, err

		case DeleteAction:
			resource, err := o.Kind(gvk, castAction.GetName())
			return true, resource, err

		case CreateAction:
			meta, err := api.ObjectMetaFor(castAction.GetObject())
			if err != nil {
				return true, nil, err
			}
			resource, err := o.Kind(gvk, meta.Name)
			return true, resource, err

		case UpdateAction:
			meta, err := api.ObjectMetaFor(castAction.GetObject())
			if err != nil {
				return true, nil, err
			}
			resource, err := o.Kind(gvk, meta.Name)
			return true, resource, err

		default:
			return false, nil, fmt.Errorf("no reaction implemented for %s", action)
		}

		return true, nil, nil
	}
}

// ObjectReaction returns a ReactionFunc that takes a generic action string of the form
// <verb>-<resource> or <verb>-<subresource>-<resource> and attempts to return a runtime
// Object or error that matches the requested action. For instance, list-replicationControllers
// should attempt to return a list of replication controllers. This method delegates to the
// ObjectRetriever interface to satisfy retrieval of lists or retrieval of single items.
// TODO: add support for sub resources
func ObjectReaction(o ObjectRetriever, mapper meta.RESTMapper) ReactionFunc {

	return func(action Action) (bool, runtime.Object, error) {
		kind, err := mapper.KindFor(unversioned.GroupVersionResource{Resource: action.GetResource()})
		if err != nil {
			return false, nil, fmt.Errorf("unrecognized action %s: %v", action.GetResource(), err)
		}

		// TODO: have mapper return a Kind for a subresource?
		switch castAction := action.(type) {
		case ListAction:
			kind.Kind += "List"
			resource, err := o.Kind(kind, "")
			return true, resource, err

		case GetAction:
			resource, err := o.Kind(kind, castAction.GetName())
			return true, resource, err

		case DeleteAction:
			resource, err := o.Kind(kind, castAction.GetName())
			return true, resource, err

		case CreateAction:
			accessor, err := meta.Accessor(castAction.GetObject())
			if err != nil {
				return true, nil, err
			}
			resource, err := o.Kind(kind, accessor.GetName())
			return true, resource, err

		case UpdateAction:
			accessor, err := meta.Accessor(castAction.GetObject())
			if err != nil {
				return true, nil, err
			}
			resource, err := o.Kind(kind, accessor.GetName())
			return true, resource, err

		default:
			return false, nil, fmt.Errorf("no reaction implemented for %s", action)
		}

		return true, nil, nil
	}
}

// ResolveResource returns the resource type and name of the resourceString.
// If the resource string has no specified type, defaultResource will be returned.
func ResolveResource(defaultResource, resourceString string, mapper meta.RESTMapper) (string, string, error) {
	if mapper == nil {
		return "", "", errors.New("mapper cannot be nil")
	}

	var name string
	parts := strings.Split(resourceString, "/")
	switch len(parts) {
	case 1:
		name = parts[0]
	case 2:
		gvk, err := mapper.KindFor(unversioned.GroupVersionResource{Resource: parts[0]})
		if err != nil {
			return "", "", err
		}
		name = parts[1]
		resource, _ := meta.KindToResource(gvk, false)
		return resource.Resource, name, nil
	default:
		return "", "", fmt.Errorf("invalid resource format: %s", resourceString)
	}

	return defaultResource, name, nil
}

// ObjectReaction returns a ReactionFunc that applies core.Action to
// the given tracker.
func ObjectReaction(tracker ObjectTracker, mapper meta.RESTMapper) ReactionFunc {
	return func(action Action) (bool, runtime.Object, error) {
		ns := action.GetNamespace()
		gvr := action.GetResource()

		gvk, err := mapper.KindFor(gvr)
		if err != nil {
			return false, nil, fmt.Errorf("error getting kind for resource %q: %s", gvr, err)
		}

		// This is a temporary fix. Because there is no internal resource, so
		// the caller has no way to express that it expects to get an internal
		// kind back. A more proper fix will be directly specify the Kind when
		// build the action.
		gvk.Version = gvr.Version
		if len(gvk.Version) == 0 {
			gvk.Version = runtime.APIVersionInternal
		}

		// Here and below we need to switch on implementation types,
		// not on interfaces, as some interfaces are identical
		// (e.g. UpdateAction and CreateAction), so if we use them,
		// updates and creates end up matching the same case branch.
		switch action := action.(type) {

		case ListActionImpl:
			obj, err := tracker.List(gvk, ns)
			return true, obj, err

		case GetActionImpl:
			obj, err := tracker.Get(gvk, ns, action.GetName())
			return true, obj, err

		case CreateActionImpl:
			objMeta, err := meta.Accessor(action.GetObject())
			if err != nil {
				return true, nil, err
			}
			if action.GetSubresource() == "" {
				err = tracker.Create(action.GetObject(), ns)
			} else {
				// TODO: Currently we're handling subresource creation as an update
				// on the enclosing resource. This works for some subresources but
				// might not be generic enough.
				err = tracker.Update(action.GetObject(), ns)
			}
			if err != nil {
				return true, nil, err
			}
			obj, err := tracker.Get(gvk, ns, objMeta.GetName())
			return true, obj, err

		case UpdateActionImpl:
			objMeta, err := meta.Accessor(action.GetObject())
			if err != nil {
				return true, nil, err
			}
			err = tracker.Update(action.GetObject(), ns)
			if err != nil {
				return true, nil, err
			}
			obj, err := tracker.Get(gvk, ns, objMeta.GetName())
			return true, obj, err

		case DeleteActionImpl:
			err := tracker.Delete(gvk, ns, action.GetName())
			if err != nil {
				return true, nil, err
			}
			return true, nil, nil

		default:
			return false, nil, fmt.Errorf("no reaction implemented for %s", action)
		}
	}
}