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point.go
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point.go
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// Copyright 2024 Google LLC
//
// 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 mappings
import (
"fmt"
"reflect"
"k8s.io/klog/v2"
)
// point holds a pointer to a field in an object, ensuring we can set it.
type point struct {
scope *Mapping
rv reflect.Value
t *reflectType
}
// newPoint builds a new point for the specified reflect.Value.
func (m *Mapping) newPoint(rv reflect.Value) *point {
t := typeOf(rv.Type())
return &point{
scope: m,
rv: rv,
t: t,
}
}
// Child gets a point for the specified child field.
func (p *point) Child(id FieldID) *point {
if p == nil {
return nil
}
field := p.t.findField(id)
if field == nil {
klog.Warningf("unable to find field %q in %v", id, p.t)
return nil
}
return field.getValue(p)
}
// SetValue sets the value of the specified child field.
func (p *point) SetValue(field FieldID, value reflect.Value) error {
f := p.t.findField(field)
if f == nil {
return fmt.Errorf("unable to find field %q in %v", field, p.t)
}
return f.setValue(p, value)
}
// GetValue gets the current value of the point.
func (p *point) GetValue() reflect.Value {
return p.rv
}