public string Perform()

in Services/DataX.Flow/DataX.Flow.CodegenRules/Formatter.cs [104:190]
83 lines of code
22 McCabe index (conditional complexity)

            public string Perform()
            {
                _result.Append(Initial);

                while (_tokens.MoveNext())
                {
                    _token = _tokens.Current;
                    _lcToken = _token.ToLowerInvariant();

                    if ("'".Equals(_token))
                    {
                        ExtractStringEnclosedBy("'");
                    }
                    else if ("\"".Equals(_token))
                    {
                        ExtractStringEnclosedBy("\"");
                    }

                    if (IsMultiQueryDelimiter(_token))
                    {
                        StartingNewQuery();
                    }
                    else if (_afterByOrSetOrFromOrSelect && ",".Equals(_token))
                    {
                        CommaAfterByOrFromOrSelect();
                    }
                    else if (_afterOn && ",".Equals(_token))
                    {
                        CommaAfterOn();
                    }
                    else if ("(".Equals(_token))
                    {
                        OpenParen();
                    }
                    else if (")".Equals(_token))
                    {
                        CloseParen();
                    }
                    else if (BeginClauses.Contains(_lcToken))
                    {
                        BeginNewClause();
                    }
                    else if (EndClauses.Contains(_lcToken))
                    {
                        EndNewClause();
                    }
                    else if ("select".Equals(_lcToken))
                    {
                        Select();
                    }
                    else if (Dml.Contains(_lcToken))
                    {
                        UpdateOrInsertOrDelete();
                    }
                    else if ("values".Equals(_lcToken))
                    {
                        Values();
                    }
                    else if ("on".Equals(_lcToken))
                    {
                        On();
                    }
                    else if (_afterBetween && _lcToken.Equals("and"))
                    {
                        Misc();
                        _afterBetween = false;
                    }
                    else if (Formatter.Logical.Contains(_lcToken))
                    {
                        Logical();
                    }
                    else if (IsWhitespace(_token))
                    {
                        White();
                    }
                    else
                    {
                        Misc();
                    }

                    if (!IsWhitespace(_token))
                    {
                        _lastToken = _lcToken;
                    }
                }
                return _result.ToString();
            }