knative.dev/pkg@v0.0.0-20260602142205-ac97e43f6622/apis/duck/v1/cronjob_validation.go (about)

     1  /*
     2  Copyright 2021 The Knative 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 v1
    18  
    19  import (
    20  	"context"
    21  
    22  	"knative.dev/pkg/apis"
    23  )
    24  
    25  // CronJobValidator is a callback to validate a CronJob.
    26  type CronJobValidator func(context.Context, *CronJob) *apis.FieldError
    27  
    28  // Validate implements apis.Validatable
    29  func (c *CronJob) Validate(ctx context.Context) *apis.FieldError {
    30  	if cv := GetCronJobValidator(ctx); cv != nil {
    31  		return cv(ctx, c)
    32  	}
    33  	return nil
    34  }
    35  
    36  // cvKey is used for associating a CronJobValidator with a context.Context
    37  type cvKey struct{}
    38  
    39  func WithCronJobValidator(ctx context.Context, cv CronJobValidator) context.Context {
    40  	return context.WithValue(ctx, cvKey{}, cv)
    41  }
    42  
    43  // GetCronJobValidator extracts the CronJobValidator from the context.
    44  func GetCronJobValidator(ctx context.Context) CronJobValidator {
    45  	untyped := ctx.Value(cvKey{})
    46  	if untyped == nil {
    47  		return nil
    48  	}
    49  	return untyped.(CronJobValidator)
    50  }