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package pgdialect
import (
"fmt"
"reflect"
"github.com/uptrace/bun/schema"
)
func hstoreScanner(typ reflect.Type) schema.ScannerFunc {
kind := typ.Kind()
switch kind {
case reflect.Ptr:
if fn := hstoreScanner(typ.Elem()); fn != nil {
return schema.PtrScanner(fn)
}
case reflect.Map:
// ok:
default:
return nil
}
if typ.Key() == stringType && typ.Elem() == stringType {
return scanMapStringStringValue
}
return func(dest reflect.Value, src interface{}) error {
return fmt.Errorf("bun: Hstore(unsupported %s)", dest.Type())
}
}
func scanMapStringStringValue(dest reflect.Value, src interface{}) error {
dest = reflect.Indirect(dest)
if !dest.CanSet() {
return fmt.Errorf("bun: Scan(non-settable %s)", dest.Type())
}
m, err := decodeMapStringString(src)
if err != nil {
return err
}
dest.Set(reflect.ValueOf(m))
return nil
}
func decodeMapStringString(src interface{}) (map[string]string, error) {
if src == nil {
return nil, nil
}
b, err := toBytes(src)
if err != nil {
return nil, err
}
m := make(map[string]string)
p := newHStoreParser(b)
for p.Next() {
m[p.Key()] = p.Value()
}
if err := p.Err(); err != nil {
return nil, err
}
return m, nil
}
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