public static string[] tokenize(string expression)
{
String[] exps = new string[] {
"\\$?(?:(?![0-9-])[\\w-]+:)?(?![0-9-])[\\w-]+",
"\\d+\\.\\d+",
"\\.\\d+",
"\\d+",
"\\/\\/",
@"\/",
"\\.\\.",
"\\.",
"\\s+",
"::",
",",
"@",
"-",
"=",
"!=",
"<=",
"<",
">=",
">",
"\\|",
"\\+",
"\\*",
"\\(",
"\\)",
"\\[",
"\\]",
"\"[^\"]*\"",
"'[^']*'"
};
string ex = string.Join("|", exps);
List <String> pString = new List <string>();
Match match = Regex.Match(expression, ex, RegexOptions.IgnoreCase);
while (match.Success)
{
if (!XPathLexer.RegexTest(match.Value, @"^\s+$"))
{
pString.Add(match.Value);
}
match = match.NextMatch();
}
if (pString.Count == 0)
{
throw new Exception("Invalid XPath expression");
}
return(pString.ToArray());
}
public XPathAnalyzer(string expression)
{
this.lexer = new XPathLexer(expression);
}
public XPathAnalyzer(string expression)
{
this.lexer = new XPathLexer(expression);
}
public XPathLexer(string expression)
{
this.tokens = XPathLexer.tokenize(expression);
this.index = 0;
}