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validation.go
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validation.go
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package validation
import (
"fmt"
"reflect"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/util/validation/field"
)
type RuntimeObjectValidator interface {
Validate(obj runtime.Object) field.ErrorList
ValidateUpdate(obj, old runtime.Object) field.ErrorList
}
var Validator = &RuntimeObjectsValidator{map[reflect.Type]RuntimeObjectValidatorInfo{}}
type RuntimeObjectsValidator struct {
typeToValidator map[reflect.Type]RuntimeObjectValidatorInfo
}
type RuntimeObjectValidatorInfo struct {
Validator RuntimeObjectValidator
IsNamespaced bool
HasObjectMeta bool
UpdateAllowed bool
}
func (v *RuntimeObjectsValidator) GetInfo(obj runtime.Object) (RuntimeObjectValidatorInfo, bool) {
ret, ok := v.typeToValidator[reflect.TypeOf(obj)]
return ret, ok
}
func (v *RuntimeObjectsValidator) MustRegister(obj runtime.Object, namespaceScoped bool, validateFunction interface{}, validateUpdateFunction interface{}) {
if err := v.Register(obj, namespaceScoped, validateFunction, validateUpdateFunction); err != nil {
panic(err)
}
}
func (v *RuntimeObjectsValidator) Register(obj runtime.Object, namespaceScoped bool, validateFunction interface{}, validateUpdateFunction interface{}) error {
objType := reflect.TypeOf(obj)
if oldValidator, exists := v.typeToValidator[objType]; exists {
panic(fmt.Sprintf("%v is already registered with %v", objType, oldValidator))
}
validator, err := NewValidationWrapper(validateFunction, validateUpdateFunction)
if err != nil {
return err
}
updateAllowed := validateUpdateFunction != nil
v.typeToValidator[objType] = RuntimeObjectValidatorInfo{validator, namespaceScoped, HasObjectMeta(obj), updateAllowed}
return nil
}
func (v *RuntimeObjectsValidator) Validate(obj runtime.Object) field.ErrorList {
if obj == nil {
return field.ErrorList{}
}
allErrs := field.ErrorList{}
specificValidationInfo, err := v.getSpecificValidationInfo(obj)
if err != nil {
allErrs = append(allErrs, field.InternalError(nil, err))
return allErrs
}
allErrs = append(allErrs, specificValidationInfo.Validator.Validate(obj)...)
return allErrs
}
func (v *RuntimeObjectsValidator) ValidateUpdate(obj, old runtime.Object) field.ErrorList {
if obj == nil && old == nil {
return field.ErrorList{}
}
if newType, oldType := reflect.TypeOf(obj), reflect.TypeOf(old); newType != oldType {
return field.ErrorList{field.Invalid(field.NewPath("kind"), newType.Kind(), fmt.Sprintf("expected type %s, for field %s, got %s", oldType.Kind().String(), "kind", newType.Kind().String()))}
}
allErrs := field.ErrorList{}
specificValidationInfo, err := v.getSpecificValidationInfo(obj)
if err != nil {
if fieldErr, ok := err.(*field.Error); ok {
allErrs = append(allErrs, fieldErr)
} else {
allErrs = append(allErrs, field.InternalError(nil, err))
}
return allErrs
}
allErrs = append(allErrs, specificValidationInfo.Validator.ValidateUpdate(obj, old)...)
// no errors so far, make sure that the new object is actually valid against the original validator
if len(allErrs) == 0 {
allErrs = append(allErrs, specificValidationInfo.Validator.Validate(obj)...)
}
return allErrs
}
func (v *RuntimeObjectsValidator) getSpecificValidationInfo(obj runtime.Object) (RuntimeObjectValidatorInfo, error) {
objType := reflect.TypeOf(obj)
specificValidationInfo, exists := v.typeToValidator[objType]
if !exists {
return RuntimeObjectValidatorInfo{}, fmt.Errorf("no validator registered for %v", objType)
}
return specificValidationInfo, nil
}
func (v *RuntimeObjectsValidator) GetRequiresNamespace(obj runtime.Object) (bool, error) {
objType := reflect.TypeOf(obj)
specificValidationInfo, exists := v.typeToValidator[objType]
if !exists {
return false, fmt.Errorf("no validator registered for %v", objType)
}
return specificValidationInfo.IsNamespaced, nil
}
func HasObjectMeta(obj runtime.Object) bool {
objValue := reflect.ValueOf(obj).Elem()
return objValue.FieldByName("ObjectMeta").IsValid()
}