lukasz-antoniak commented on code in PR #1828:
URL:
https://github.com/apache/cassandra-gocql-driver/pull/1828#discussion_r2034853051
##########
marshal.go:
##########
@@ -1716,6 +1726,169 @@ func unmarshalList(info TypeInfo, data []byte, value
interface{}) error {
return unmarshalErrorf("can not unmarshal %s into %T. Accepted types:
*slice, *array.", info, value)
}
+func marshalVector(info VectorType, value interface{}) ([]byte, error) {
+ if value == nil {
+ return nil, nil
+ } else if _, ok := value.(unsetColumn); ok {
+ return nil, nil
+ }
+
+ rv := reflect.ValueOf(value)
+ t := rv.Type()
+ k := t.Kind()
+ if k == reflect.Slice && rv.IsNil() {
+ return nil, nil
+ }
+
+ switch k {
+ case reflect.Slice, reflect.Array:
+ buf := &bytes.Buffer{}
+ n := rv.Len()
+ if n != info.Dimensions {
+ return nil, marshalErrorf("expected vector with %d
dimensions, received %d", info.Dimensions, n)
+ }
+
+ for i := 0; i < n; i++ {
+ item, err := Marshal(info.SubType,
rv.Index(i).Interface())
+ if err != nil {
+ return nil, err
+ }
+ if isVectorVariableLengthType(info.SubType) {
+ writeUnsignedVInt(buf, uint64(len(item)))
Review Comment:
When dealing with fix-length types, serializing length of the element is not
required. `isVectorVariableLengthType ` returns true for all types that require
serialization of their length. Not sure what comment should be appropriate,
which does not just read the code.
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