// writeIndexValue writes the index value of v to buf.
//
// v may be one of the return types from ds.Property's GetIndexTypeAndValue
// method.
func writeIndexValue(buf Buffer, context KeyContext, v interface{}) (err error) {
switch t := v.(type) {
case nil:
case bool:
b := byte(0)
if t {
b = 1
}
err = buf.WriteByte(b)
case int64:
_, err = cmpbin.WriteInt(buf, t)
case float64:
_, err = cmpbin.WriteFloat64(buf, t)
case string:
_, err = cmpbin.WriteString(buf, t)
case []byte:
_, err = cmpbin.WriteBytes(buf, t)
case ds.GeoPoint:
err = WriteGeoPoint(buf, t)
case *ds.Key:
err = WriteKey(buf, context, t)
default:
err = fmt.Errorf("unsupported type: %T", t)
}
return
}
// WriteProperty writes a Property to the buffer. `context` behaves the same
// way that it does for WriteKey, but only has an effect if `p` contains a
// Key as its Value.
func WriteProperty(buf Buffer, context KeyContext, p ds.Property) (err error) {
defer recoverTo(&err)
typb := byte(p.Type())
if p.IndexSetting() != ds.NoIndex {
typb |= 0x80
}
panicIf(buf.WriteByte(typb))
switch p.Type() {
case ds.PTNull:
case ds.PTBool:
b := p.Value().(bool)
if b {
err = buf.WriteByte(1)
} else {
err = buf.WriteByte(0)
}
case ds.PTInt:
_, err = cmpbin.WriteInt(buf, p.Value().(int64))
case ds.PTFloat:
_, err = cmpbin.WriteFloat64(buf, p.Value().(float64))
case ds.PTString:
_, err = cmpbin.WriteString(buf, p.Value().(string))
case ds.PTBytes:
_, err = cmpbin.WriteBytes(buf, p.Value().([]byte))
case ds.PTTime:
err = WriteTime(buf, p.Value().(time.Time))
case ds.PTGeoPoint:
err = WriteGeoPoint(buf, p.Value().(ds.GeoPoint))
case ds.PTKey:
err = WriteKey(buf, context, p.Value().(ds.Key))
case ds.PTBlobKey:
_, err = cmpbin.WriteString(buf, string(p.Value().(blobstore.Key)))
}
return
}