SqlResults.java 文件源码

/**
 * Constructs an instance of StoreLogEntry using parts of a row from ResultSet. Used for creating the store operation for Undo.
 *
 * @param reader
 *            ResultSet whose row has operation information.
 * @param offset
 *            Reader offset for column that begins operation information.
 */
public static StoreLogEntry readLogEntry(ResultSet reader,
        int offset) throws SQLException {
    try {
        UUID shardIdRemoves = StringUtilsLocal.isNullOrEmpty(reader.getString(offset + 4)) ? null : UUID.fromString(reader.getString(offset + 4));
        UUID shardIdAdds = StringUtilsLocal.isNullOrEmpty(reader.getString(offset + 5)) ? null : UUID.fromString(reader.getString(offset + 5));
        Document doc = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(reader.getSQLXML(offset + 2).getBinaryStream());

        return new StoreLogEntry(UUID.fromString(reader.getString(offset)), StoreOperationCode.forValue(reader.getInt(offset + 1)),
                (Element) doc.getFirstChild(), StoreOperationState.forValue(reader.getInt(offset + 3)), shardIdRemoves, shardIdAdds);
    }
    catch (SAXException | IOException | ParserConfigurationException e) {
        e.printStackTrace();
        return null;
    }
}