fn try_from()

in src/columnar_storage/src/manifest/encoding.rs [271:292]

• 21 lines of code
• 5 McCabe index (conditional complexity)

    fn try_from(bytes: Bytes) -> Result<Self> {
        if bytes.is_empty() {
            return Ok(Snapshot::default());
        }
        let bytes_len = bytes.len();
        let mut cursor = Cursor::new(bytes);
        let header = SnapshotHeader::try_new(&mut cursor)?;
        let record_total_length = header.length as usize;
        ensure!(
            record_total_length > 0
                && record_total_length % SnapshotRecord::LENGTH == 0
                && record_total_length + SnapshotHeader::LENGTH == bytes_len,
            "create snapshot from bytes failed, header:{header:?}, bytes_length: {bytes_len}",
        );
        let mut records = Vec::with_capacity(record_total_length / SnapshotRecord::LENGTH);
        while cursor.has_remaining() {
            let record = SnapshotRecord::try_new(&mut cursor)?;
            records.push(record);
        }

        Ok(Self { header, records })
    }