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package etreeutils
import (
"encoding/xml"
"github.com/beevik/etree"
)
// NSUnmarshalElement unmarshals the passed etree Element into the value pointed to by
// v using encoding/xml in the context of the passed NSContext. If v implements
// ElementKeeper, SetUnderlyingElement will be called on v with a reference to el.
func NSUnmarshalElement(ctx NSContext, el *etree.Element, v interface{}) error {
detatched, err := NSDetatch(ctx, el)
if err != nil {
return err
}
doc := etree.NewDocument()
doc.AddChild(detatched)
data, err := doc.WriteToBytes()
if err != nil {
return err
}
err = xml.Unmarshal(data, v)
if err != nil {
return err
}
switch v := v.(type) {
case ElementKeeper:
v.SetUnderlyingElement(el)
}
return nil
}
// ElementKeeper should be implemented by types which will be passed to
// UnmarshalElement, but wish to keep a reference
type ElementKeeper interface {
SetUnderlyingElement(*etree.Element)
UnderlyingElement() *etree.Element
}
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