private ConditionExpression ParseLiteralExpression()
{
if (tokenizer.IsToken(ConditionTokenType.LeftParen))
{
tokenizer.GetNextToken();
var e = ParseExpression();
tokenizer.Expect(ConditionTokenType.RightParen);
return e;
}
if (tokenizer.IsToken(ConditionTokenType.Minus))
{
tokenizer.GetNextToken();
if (!tokenizer.IsNumber())
{
throw new ConditionParseException("Number expected, got " + tokenizer.TokenType);
}
var numberString = tokenizer.TokenValue;
tokenizer.GetNextToken();
if (numberString.IndexOf('.') >= 0)
{
return new ConditionLiteralExpression(-double.Parse(numberString, CultureInfo.InvariantCulture));
}
return new ConditionLiteralExpression(-int.Parse(numberString, CultureInfo.InvariantCulture));
}
if (tokenizer.IsNumber())
{
var numberString = tokenizer.TokenValue;
tokenizer.GetNextToken();
if (numberString.IndexOf('.') >= 0)
{
return new ConditionLiteralExpression(double.Parse(numberString, CultureInfo.InvariantCulture));
}
return new ConditionLiteralExpression(int.Parse(numberString, CultureInfo.InvariantCulture));
}
if (tokenizer.TokenType == ConditionTokenType.String)
{
ConditionExpression e = new ConditionLayoutExpression(Layout.FromString(tokenizer.StringTokenValue, configurationItemFactory));
tokenizer.GetNextToken();
return e;
}
if (tokenizer.TokenType == ConditionTokenType.Keyword)
{
var keyword = tokenizer.EatKeyword();
if (0 == string.Compare(keyword, "level", StringComparison.OrdinalIgnoreCase))
{
return new ConditionLevelExpression();
}
if (0 == string.Compare(keyword, "logger", StringComparison.OrdinalIgnoreCase))
{
return new ConditionLoggerNameExpression();
}
if (0 == string.Compare(keyword, "message", StringComparison.OrdinalIgnoreCase))
{
return new ConditionMessageExpression();
}
if (0 == string.Compare(keyword, "loglevel", StringComparison.OrdinalIgnoreCase))
{
tokenizer.Expect(ConditionTokenType.Dot);
return new ConditionLiteralExpression(LogLevel.FromString(tokenizer.EatKeyword()));
}
if (0 == string.Compare(keyword, "true", StringComparison.OrdinalIgnoreCase))
{
return new ConditionLiteralExpression(true);
}
if (0 == string.Compare(keyword, "false", StringComparison.OrdinalIgnoreCase))
{
return new ConditionLiteralExpression(false);
}
if (0 == string.Compare(keyword, "null", StringComparison.OrdinalIgnoreCase))
{
return new ConditionLiteralExpression(null);
}
if (tokenizer.TokenType == ConditionTokenType.LeftParen)
{
tokenizer.GetNextToken();
var predicateExpression = ParsePredicate(keyword);
return predicateExpression;
}
}
throw new ConditionParseException("Unexpected token: " + tokenizer.TokenValue);
}
private ConditionExpression ParseLiteralExpression()
{
if (tokenizer.IsToken(ConditionTokenType.LeftParen))
{
tokenizer.GetNextToken();
var e = ParseExpression();
tokenizer.Expect(ConditionTokenType.RightParen);
return(e);
}
if (tokenizer.IsToken(ConditionTokenType.Minus))
{
tokenizer.GetNextToken();
if (!tokenizer.IsNumber())
{
throw new ConditionParseException("Number expected, got " + tokenizer.TokenType);
}
var numberString = tokenizer.TokenValue;
tokenizer.GetNextToken();
if (numberString.IndexOf('.') >= 0)
{
return(new ConditionLiteralExpression(-double.Parse(numberString, CultureInfo.InvariantCulture)));
}
return(new ConditionLiteralExpression(-int.Parse(numberString, CultureInfo.InvariantCulture)));
}
if (tokenizer.IsNumber())
{
var numberString = tokenizer.TokenValue;
tokenizer.GetNextToken();
if (numberString.IndexOf('.') >= 0)
{
return(new ConditionLiteralExpression(double.Parse(numberString, CultureInfo.InvariantCulture)));
}
return(new ConditionLiteralExpression(int.Parse(numberString, CultureInfo.InvariantCulture)));
}
if (tokenizer.TokenType == ConditionTokenType.String)
{
ConditionExpression e = new ConditionLayoutExpression(Layout.FromString(tokenizer.StringTokenValue, configurationItemFactory));
tokenizer.GetNextToken();
return(e);
}
if (tokenizer.TokenType == ConditionTokenType.Keyword)
{
var keyword = tokenizer.EatKeyword();
if (0 == string.Compare(keyword, "level", StringComparison.OrdinalIgnoreCase))
{
return(new ConditionLevelExpression());
}
if (0 == string.Compare(keyword, "logger", StringComparison.OrdinalIgnoreCase))
{
return(new ConditionLoggerNameExpression());
}
if (0 == string.Compare(keyword, "message", StringComparison.OrdinalIgnoreCase))
{
return(new ConditionMessageExpression());
}
if (0 == string.Compare(keyword, "loglevel", StringComparison.OrdinalIgnoreCase))
{
tokenizer.Expect(ConditionTokenType.Dot);
return(new ConditionLiteralExpression(LogLevel.FromString(tokenizer.EatKeyword())));
}
if (0 == string.Compare(keyword, "true", StringComparison.OrdinalIgnoreCase))
{
return(new ConditionLiteralExpression(true));
}
if (0 == string.Compare(keyword, "false", StringComparison.OrdinalIgnoreCase))
{
return(new ConditionLiteralExpression(false));
}
if (0 == string.Compare(keyword, "null", StringComparison.OrdinalIgnoreCase))
{
return(new ConditionLiteralExpression(null));
}
if (tokenizer.TokenType == ConditionTokenType.LeftParen)
{
tokenizer.GetNextToken();
var predicateExpression = ParsePredicate(keyword);
return(predicateExpression);
}
}
throw new ConditionParseException("Unexpected token: " + tokenizer.TokenValue);
}
