conversion.go

Documentation: k8s.io/client-go/scale/scheme/extensionsv1beta1

     1  /*
     2  Copyright 2017 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 extensionsv1beta1
    18  
    19  import (
    20  	"fmt"
    21  
    22  	v1beta1 "k8s.io/api/extensions/v1beta1"
    23  	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    24  	"k8s.io/apimachinery/pkg/conversion"
    25  	scheme "k8s.io/client-go/scale/scheme"
    26  )
    27  
    28  func Convert_scheme_ScaleStatus_To_v1beta1_ScaleStatus(in *scheme.ScaleStatus, out *v1beta1.ScaleStatus, s conversion.Scope) error {
    29  	out.Replicas = in.Replicas
    30  	out.Selector = nil
    31  	out.TargetSelector = ""
    32  	if in.Selector != nil {
    33  		if in.Selector.MatchExpressions == nil || len(in.Selector.MatchExpressions) == 0 {
    34  			out.Selector = in.Selector.MatchLabels
    35  		}
    36  
    37  		selector, err := metav1.LabelSelectorAsSelector(in.Selector)
    38  		if err != nil {
    39  			return fmt.Errorf("invalid label selector: %v", err)
    40  		}
    41  		out.TargetSelector = selector.String()
    42  	}
    43  
    44  	return nil
    45  }
    46  
    47  func Convert_v1beta1_ScaleStatus_To_scheme_ScaleStatus(in *v1beta1.ScaleStatus, out *scheme.ScaleStatus, s conversion.Scope) error {
    48  	out.Replicas = in.Replicas
    49  
    50  	// Normally when 2 fields map to the same internal value we favor the old field, since
    51  	// old clients can't be expected to know about new fields but clients that know about the
    52  	// new field can be expected to know about the old field (though that's not quite true, due
    53  	// to kubectl apply). However, these fields are readonly, so any non-nil value should work.
    54  	if in.TargetSelector != "" {
    55  		labelSelector, err := metav1.ParseToLabelSelector(in.TargetSelector)
    56  		if err != nil {
    57  			out.Selector = nil
    58  			return fmt.Errorf("failed to parse target selector: %v", err)
    59  		}
    60  		out.Selector = labelSelector
    61  	} else if in.Selector != nil {
    62  		out.Selector = new(metav1.LabelSelector)
    63  		selector := make(map[string]string)
    64  		for key, val := range in.Selector {
    65  			selector[key] = val
    66  		}
    67  		out.Selector.MatchLabels = selector
    68  	} else {
    69  		out.Selector = nil
    70  	}
    71  
    72  	return nil
    73  }
    74
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