fluss/metadata/
data_lake_format.rs

1// Licensed to the Apache Software Foundation (ASF) under one
2// or more contributor license agreements.  See the NOTICE file
3// distributed with this work for additional information
4// regarding copyright ownership.  The ASF licenses this file
5// to you under the Apache License, Version 2.0 (the
6// "License"); you may not use this file except in compliance
7// with the License.  You may obtain a copy of the License at
8//
9//   http://www.apache.org/licenses/LICENSE-2.0
10//
11// Unless required by applicable law or agreed to in writing,
12// software distributed under the License is distributed on an
13// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
14// KIND, either express or implied.  See the License for the
15// specific language governing permissions and limitations
16// under the License.
17
18use strum_macros::{Display, EnumString};
19
20/// Identifies the logical format of a data lake table supported by Fluss.
21///
22/// This enum is typically used in metadata and configuration to distinguish
23/// between different table formats so that the appropriate integration and
24/// semantics can be applied.
25#[derive(Debug, EnumString, Display, PartialEq)]
26#[strum(ascii_case_insensitive)]
27pub enum DataLakeFormat {
28    #[strum(serialize = "paimon")]
29    Paimon,
30
31    #[strum(serialize = "lance")]
32    Lance,
33
34    #[strum(serialize = "iceberg")]
35    Iceberg,
36}
37
38#[cfg(test)]
39mod tests {
40    use crate::metadata::DataLakeFormat;
41    use crate::metadata::DataLakeFormat::{Iceberg, Lance, Paimon};
42
43    #[test]
44    fn test_parse() {
45        let cases = vec![
46            ("paimon", Paimon),
47            ("Paimon", Paimon),
48            ("PAIMON", Paimon),
49            ("lance", Lance),
50            ("LANCE", Lance),
51            ("iceberg", Iceberg),
52            ("ICEBERG", Iceberg),
53        ];
54
55        for (raw, expected) in cases {
56            let parsed = raw.parse::<DataLakeFormat>().unwrap();
57            assert_eq!(parsed, expected, "failed to parse: {raw}");
58        }
59
60        // negative cases
61        assert!("unknown".parse::<DataLakeFormat>().is_err());
62        assert!("".parse::<DataLakeFormat>().is_err());
63    }
64}
fluss/metadata/data_lake_format.rs

fluss/metadata/
data_lake_format.rs
