/*
Copyright 2022 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 config

var registry = make(map[Version]func() Config)

// Register allows implementations of Config to register themselves so that they can be created with New
func Register(version Version, constructor func() Config) {
	registry[version] = constructor
}

// IsRegistered returns true if the given version has been registered through Register
func IsRegistered(version Version) bool {
	_, ok := registry[version]
	return ok
}

// New creates Config instances from the previously registered implementations through Register
func New(version Version) (Config, error) {
	if constructor, exists := registry[version]; exists {
		return constructor(), nil
	}

	return nil, UnsupportedVersionError{Version: version}
}
