func Unmarshal()

in marshal.go [231:296]

• 60 lines of code
• 28 McCabe index (conditional complexity)

func Unmarshal(info TypeInfo, data []byte, value interface{}) error {
	if v, ok := value.(Unmarshaler); ok {
		return v.UnmarshalCQL(info, data)
	}

	if isNullableValue(value) {
		return unmarshalNullable(info, data, value)
	}

	switch info.Type() {
	case TypeVarchar, TypeAscii, TypeBlob, TypeText:
		return unmarshalVarchar(info, data, value)
	case TypeBoolean:
		return unmarshalBool(info, data, value)
	case TypeInt:
		return unmarshalInt(info, data, value)
	case TypeBigInt, TypeCounter:
		return unmarshalBigInt(info, data, value)
	case TypeVarint:
		return unmarshalVarint(info, data, value)
	case TypeSmallInt:
		return unmarshalSmallInt(info, data, value)
	case TypeTinyInt:
		return unmarshalTinyInt(info, data, value)
	case TypeFloat:
		return unmarshalFloat(info, data, value)
	case TypeDouble:
		return unmarshalDouble(info, data, value)
	case TypeDecimal:
		return unmarshalDecimal(info, data, value)
	case TypeTime:
		return unmarshalTime(info, data, value)
	case TypeTimestamp:
		return unmarshalTimestamp(info, data, value)
	case TypeList, TypeSet:
		return unmarshalList(info, data, value)
	case TypeMap:
		return unmarshalMap(info, data, value)
	case TypeTimeUUID:
		return unmarshalTimeUUID(info, data, value)
	case TypeUUID:
		return unmarshalUUID(info, data, value)
	case TypeInet:
		return unmarshalInet(info, data, value)
	case TypeTuple:
		return unmarshalTuple(info, data, value)
	case TypeUDT:
		return unmarshalUDT(info, data, value)
	case TypeDate:
		return unmarshalDate(info, data, value)
	case TypeDuration:
		return unmarshalDuration(info, data, value)
	case TypeCustom:
		if vector, ok := info.(VectorType); ok {
			return unmarshalVector(vector, data, value)
		}
	}

	// detect protocol 2 UDT
	if strings.HasPrefix(info.Custom(), "org.apache.cassandra.db.marshal.UserType") && info.Version() < 3 {
		return ErrorUDTUnavailable
	}

	// TODO(tux21b): add the remaining types
	return fmt.Errorf("can not unmarshal %s into %T", info, value)
}