internal IXQuerySelector GetNextSelector(XQueryParserContext context)
{
Match match = null;
XQuerySelectorCreator xqsc = null;
int matchLength = 0;
var str = context.Query.Substring(context.Index);
XQuerySelectorCreator[] selectors;
lock (_selectors)
selectors = _selectors.ToArray();
foreach (var qs in selectors)
{
var m = qs.MatchNext.Match(str);
if (m.Success && m.Length > matchLength)
{
matchLength = m.Length;
xqsc = qs;
match = m;
}
}
if (xqsc == null)
{
return(null);
}
var sel = xqsc.Create(context, match);
context.Index += match.Length;
return(sel);
}
internal IXQuerySelector GetNextSelector(XQueryParserContext context)
{
Match match = null;
XQuerySelectorCreator xqsc = null;
int matchLength = 0;
var str = context.Query.Substring(context.Index);
XQuerySelectorCreator[] selectors;
lock(_selectors)
selectors = _selectors.ToArray();
foreach(var qs in selectors)
{
var m = qs.MatchNext.Match(str);
if(m.Success && m.Length > matchLength)
{
matchLength = m.Length;
xqsc = qs;
match = m;
}
}
if(xqsc == null)
return null;
var sel = xqsc.Create(context, match);
context.Index += match.Length;
return sel;
}
internal static IXQuerySelector[] Parse(XQueryParserContext context)
{
var list = new List<IXQuerySelector>();
while(!context.EndOfQuery)
{
var selector = context.MatchNextSelector();
if(selector == null)
throw new XQueryException("Unexpected character at position " + context.Index + " in query: " + context.Query.Substring(context.Index), context.Query, context.Index, 1);
list.Add(selector);
}
return list.ToArray();
}
public static XElement[] Execute(string query, XDocument doc, params XElement[] baseElements)
{
var parserContext = new XQueryParserContext(new SelectorParserCatalog(), query);
var selectors = Parse(parserContext);
var resultsContext = new XQueryResultsContext(doc);
if(baseElements.Length > 0)
resultsContext.ResultSetInternal = baseElements;
if(selectors.Length > 0)
if(selectors.Last().IsTransposeSelector || selectors.First().IsTransposeSelector)
throw new XQueryException("A query may not start or end with a transposal selector (e.g. >)", query, 0, query.Length);
foreach(var selector in selectors)
selector.Execute(resultsContext);
return resultsContext.ResultSet;
}
internal static IXQuerySelector[] Parse(XQueryParserContext context)
{
var list = new List <IXQuerySelector>();
while (!context.EndOfQuery)
{
var selector = context.MatchNextSelector();
if (selector == null)
{
throw new XQueryException("Unexpected character at position " + context.Index + " in query: " + context.Query.Substring(context.Index), context.Query, context.Index, 1);
}
list.Add(selector);
}
return(list.ToArray());
}
public static XElement[] Execute(string query, XDocument doc, params XElement[] baseElements)
{
var parserContext = new XQueryParserContext(new SelectorParserCatalog(), query);
var selectors = Parse(parserContext);
var resultsContext = new XQueryResultsContext(doc);
if (baseElements.Length > 0)
{
resultsContext.ResultSetInternal = baseElements;
}
if (selectors.Length > 0)
{
if (selectors.Last().IsTransposeSelector || selectors.First().IsTransposeSelector)
{
throw new XQueryException("A query may not start or end with a transposal selector (e.g. >)", query, 0, query.Length);
}
}
foreach (var selector in selectors)
{
selector.Execute(resultsContext);
}
return(resultsContext.ResultSet);
}
public abstract IXQuerySelector Create(XQueryParserContext context, Match match);
public abstract IXQuerySelector Create(XQueryParserContext context, Match match);
