private static ParseResult IsTokenValid(ParseContext context, SqlGrammarRuleSequenceTerminal terminalReference, int level, int tokenOffset, ReservedWordScope scope)
{
var tokenIsValid = false;
IList <StatementGrammarNode> nodes = null;
var terminalId = terminalReference.Id;
if (context.TokenBuffer.Count > tokenOffset)
{
var currentToken = context.TokenBuffer[tokenOffset];
var terminal = terminalReference.Terminal;
var isReservedWord = false;
if (String.IsNullOrEmpty(terminal.RegexValue))
{
var tokenValue = currentToken.UpperInvariantValue;
tokenIsValid = String.Equals(terminal.Value, tokenValue) || (terminal.AllowQuotedNotation && tokenValue.Length == terminal.Value.Length + 2 && tokenValue[0] == '"' && tokenValue[tokenValue.Length - 1] == '"' && String.Equals(tokenValue.Substring(1, tokenValue.Length - 2), terminal.Value));
isReservedWord = tokenIsValid && (scope == ReservedWordScope.Sql ? terminal.ReservedWord == ReservedWordType.Sql : terminal.ReservedWord > 0);
}
else
{
tokenIsValid = terminal.RegexMatcher.IsMatch(currentToken.Value);
if (tokenIsValid && !terminalReference.AllowReservedWord)
{
var isNotReservedWord = !OracleGrammarDescription.ReservedWordsSql.Contains(currentToken.UpperInvariantValue);
if (isNotReservedWord && scope == ReservedWordScope.PlSqlBody)
{
var effectiveReservedWords = context.PlSqlStatementTokenIndex.Count == 0 || context.PlSqlStatementTokenIndex.Peek() == tokenOffset
? OracleGrammarDescription.ReservedWordsPlSqlBody
: OracleGrammarDescription.ReservedWordsPlSql;
isNotReservedWord = !effectiveReservedWords.Contains(currentToken.UpperInvariantValue);
}
if (isNotReservedWord && scope == ReservedWordScope.PlSqlDeclaration)
{
isNotReservedWord = !OracleGrammarDescription.ReservedWordsPlSqlDeclaration.Contains(currentToken.UpperInvariantValue);
}
tokenIsValid &= isNotReservedWord;
}
}
if (tokenIsValid)
{
var terminalNode =
new StatementGrammarNode(NodeType.Terminal, context.Statement, currentToken)
{
Id = terminalId,
Level = level,
IsRequired = terminalReference.IsRequired,
IsReservedWord = isReservedWord
};
nodes = new[] { terminalNode };
}
}
return
(new ParseResult
{
NodeId = terminalId,
Status = tokenIsValid ? ParseStatus.Success : ParseStatus.SequenceNotFound,
Nodes = nodes
});
}
private static ParseResult IsTokenValid(ParseContext context, SqlGrammarRuleSequenceTerminal terminalReference, int level, int tokenOffset, ReservedWordScope scope)
{
var tokenIsValid = false;
IList<StatementGrammarNode> nodes = null;
var terminalId = terminalReference.Id;
if (context.TokenBuffer.Count > tokenOffset)
{
var currentToken = context.TokenBuffer[tokenOffset];
var terminal = terminalReference.Terminal;
var isReservedWord = false;
if (String.IsNullOrEmpty(terminal.RegexValue))
{
var tokenValue = currentToken.UpperInvariantValue;
tokenIsValid = String.Equals(terminal.Value, tokenValue) || (terminal.AllowQuotedNotation && tokenValue.Length == terminal.Value.Length + 2 && tokenValue[0] == '"' && tokenValue[tokenValue.Length - 1] == '"' && String.Equals(tokenValue.Substring(1, tokenValue.Length - 2), terminal.Value));
isReservedWord = tokenIsValid && (scope == ReservedWordScope.Sql ? terminal.ReservedWord == ReservedWordType.Sql : terminal.ReservedWord > 0);
}
else
{
tokenIsValid = terminal.RegexMatcher.IsMatch(currentToken.Value);
if (tokenIsValid && !terminalReference.AllowReservedWord)
{
var isNotReservedWord = !OracleGrammarDescription.ReservedWordsSql.Contains(currentToken.UpperInvariantValue);
if (isNotReservedWord && scope == ReservedWordScope.PlSqlBody)
{
var effectiveReservedWords = context.PlSqlStatementTokenIndex.Count == 0 || context.PlSqlStatementTokenIndex.Peek() == tokenOffset
? OracleGrammarDescription.ReservedWordsPlSqlBody
: OracleGrammarDescription.ReservedWordsPlSql;
isNotReservedWord = !effectiveReservedWords.Contains(currentToken.UpperInvariantValue);
}
if (isNotReservedWord && scope == ReservedWordScope.PlSqlDeclaration)
{
isNotReservedWord = !OracleGrammarDescription.ReservedWordsPlSqlDeclaration.Contains(currentToken.UpperInvariantValue);
}
tokenIsValid &= isNotReservedWord;
}
}
if (tokenIsValid)
{
var terminalNode =
new StatementGrammarNode(NodeType.Terminal, context.Statement, currentToken)
{
Id = terminalId,
Level = level,
IsRequired = terminalReference.IsRequired,
IsReservedWord = isReservedWord
};
nodes = new[] { terminalNode };
}
}
return
new ParseResult
{
NodeId = terminalId,
Status = tokenIsValid ? ParseStatus.Success : ParseStatus.SequenceNotFound,
Nodes = nodes
};
}
