sigs.k8s.io/kubebuilder/v3@v3.14.0/pkg/config/registry.go (about)

     1  /*
     2  Copyright 2022 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package config
    18  
    19  var (
    20  	registry = make(map[Version]func() Config)
    21  )
    22  
    23  // Register allows implementations of Config to register themselves so that they can be created with New
    24  func Register(version Version, constructor func() Config) {
    25  	registry[version] = constructor
    26  }
    27  
    28  // IsRegistered returns true if the given version has been registered through Register
    29  func IsRegistered(version Version) bool {
    30  	_, ok := registry[version]
    31  	return ok
    32  }
    33  
    34  // New creates Config instances from the previously registered implementations through Register
    35  func New(version Version) (Config, error) {
    36  	if constructor, exists := registry[version]; exists {
    37  		return constructor(), nil
    38  	}
    39  
    40  	return nil, UnsupportedVersionError{Version: version}
    41  }