public static CsvCommandParser GetInstance()
{
if (instance == null)
{
instance = new CsvCommandParser();
}
return(instance);
}
public CsvUpdateCommand(string s) : base(s)
{
var parser = CsvCommandParser.GetInstance();
var match = Pattern.Match(s);
if (!match.Success)
{
throw new Exception("Cannot parse into update command");
}
var updateStr = match.Groups[1].Value;
Updaters = parser.ParseUpdaters(updateStr);
var conditionStr = match.Groups[2].Value;
Condition = parser.ParseCondition(conditionStr);
CommandType = CsvCommandType.Update;
}
public CsvSelectCommand(string s) : base(s)
{
var parser = CsvCommandParser.GetInstance();
var match = Pattern.Match(s);
if (!match.Success)
{
throw new Exception("Cannot parse into select command");
}
var headerStr = match.Groups[1].Value;
Headers = parser.ParseHeaders(headerStr);
AllHeaders = Headers.Count == 1 && Headers[0] == "*";
var conditionStr = match.Groups[2].Value;
Condition = parser.ParseCondition(conditionStr);
CommandType = CsvCommandType.Select;
}