// Copyright (c) 2020 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 core

import (
	"fmt"

	gardencore "github.com/gardener/gardener/pkg/apis/core"
	"k8s.io/apimachinery/pkg/runtime"
)

// Accessor tries to create a `gardencore.Object` from the given runtime.Object.
//
// If the given object already implements Object, it is returned as-is.
// Otherwise, an error with the type of the object is returned.
func Accessor(obj runtime.Object) (gardencore.Object, error) {
	switch v := obj.(type) {
	case gardencore.Object:
		return v, nil
	default:
		return nil, fmt.Errorf("value of type %T does not implement Object", obj)
	}
}