strategy.go

package image

import (
	"fmt"

	kapi "github.com/GoogleCloudPlatform/kubernetes/pkg/api"
	"github.com/GoogleCloudPlatform/kubernetes/pkg/fields"
	"github.com/GoogleCloudPlatform/kubernetes/pkg/labels"
	"github.com/GoogleCloudPlatform/kubernetes/pkg/registry/generic"
	"github.com/GoogleCloudPlatform/kubernetes/pkg/runtime"
	"github.com/GoogleCloudPlatform/kubernetes/pkg/util/fielderrors"

	"github.com/openshift/origin/pkg/image/api"
	"github.com/openshift/origin/pkg/image/api/validation"
)

// imageStrategy implements behavior for Images.
type imageStrategy struct {
	runtime.ObjectTyper
	kapi.NameGenerator
}

// Strategy is the default logic that applies when creating and updating
// Image objects via the REST API.
var Strategy = imageStrategy{kapi.Scheme, kapi.SimpleNameGenerator}

// NamespaceScoped is false for images.
func (imageStrategy) NamespaceScoped() bool {
	return false
}

// PrepareForCreate clears fields that are not allowed to be set by end users on creation.
func (imageStrategy) PrepareForCreate(obj runtime.Object) {
}

// Validate validates a new image.
func (imageStrategy) Validate(ctx kapi.Context, obj runtime.Object) fielderrors.ValidationErrorList {
	image := obj.(*api.Image)
	return validation.ValidateImage(image)
}

// AllowCreateOnUpdate is false for images.
func (imageStrategy) AllowCreateOnUpdate() bool {
	return false
}

// MatchImage returns a generic matcher for a given label and field selector.
func MatchImage(label labels.Selector, field fields.Selector) generic.Matcher {
	return generic.MatcherFunc(func(obj runtime.Object) (bool, error) {
		image, ok := obj.(*api.Image)
		if !ok {
			return false, fmt.Errorf("not an image")
		}
		fields := ImageToSelectableFields(image)
		return label.Matches(labels.Set(image.Labels)) && field.Matches(fields), nil
	})
}

// ImageToSelectableFields returns a label set that represents the object.
func ImageToSelectableFields(image *api.Image) labels.Set {
	return labels.Set{
		"name": image.Name,
	}
}