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// +build appengine
package msgpack
import (
"reflect"
ds "google.golang.org/appengine/datastore"
)
func init() {
Register((*ds.Key)(nil), encodeDatastoreKeyValue, decodeDatastoreKeyValue)
Register((*ds.Cursor)(nil), encodeDatastoreCursorValue, decodeDatastoreCursorValue)
}
func EncodeDatastoreKey(e *Encoder, key *ds.Key) error {
if key == nil {
return e.EncodeNil()
}
return e.EncodeString(key.Encode())
}
func encodeDatastoreKeyValue(e *Encoder, v reflect.Value) error {
key := v.Interface().(*ds.Key)
return EncodeDatastoreKey(e, key)
}
func DecodeDatastoreKey(d *Decoder) (*ds.Key, error) {
v, err := d.DecodeString()
if err != nil {
return nil, err
}
if v == "" {
return nil, nil
}
return ds.DecodeKey(v)
}
func decodeDatastoreKeyValue(d *Decoder, v reflect.Value) error {
key, err := DecodeDatastoreKey(d)
if err != nil {
return err
}
v.Set(reflect.ValueOf(key))
return nil
}
func encodeDatastoreCursorValue(e *Encoder, v reflect.Value) error {
cursor := v.Interface().(ds.Cursor)
return e.Encode(cursor.String())
}
func decodeDatastoreCursorValue(d *Decoder, v reflect.Value) error {
s, err := d.DecodeString()
if err != nil {
return err
}
cursor, err := ds.DecodeCursor(s)
if err != nil {
return err
}
v.Set(reflect.ValueOf(cursor))
return nil
}
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