/// <summary>
/// Parse a oslc.orderBy expression
/// </summary>
/// <param name="orderByExpression">contents of an oslc.orderBy HTTP query
/// parameter</param>
/// <param name="prefixMap">map between XML namespace prefixes and
/// associated URLs</param>
/// <returns></returns>
public static OrderByClause ParseOrderBy(string orderByExpression, IReadOnlyDictionary <string, string> prefixMap)
{
try
{
var parser = new OslcOrderByParser(orderByExpression);
if (parser.input.ToString() != orderByExpression)
{
return(new SortTermsImpl(isError: true, errorReason: "parse error"));
}
var rawTree = (CommonTree)parser.Result;
var child = rawTree.GetChild(0);
if (child is BaseTree baseTree)
{
if (baseTree.Children?.Any(item => item is CommonErrorNode) ?? false)
{
return(new SortTermsImpl(isError: true, errorReason: baseTree?.ToString()));
}
}
if (child is CommonErrorNode)
{
return(new SortTermsImpl(isError: true, errorReason: child?.ToString()));
}
return((OrderByClause) new SortTermsImpl(rawTree, prefixMap));
}
catch (RecognitionException e)
{
return(new SortTermsImpl(isError: true, errorReason: e.ToString()));
}
}
ParseOrderBy(
string orderByExpression,
IDictionary <string, string> prefixMap
)
{
try {
OslcOrderByParser parser = new OslcOrderByParser(orderByExpression);
CommonTree rawTree = (CommonTree)parser.Result;
ITree child = rawTree.GetChild(0);
if (child is CommonErrorNode)
{
throw new ParseException(child.ToString());
}
return((OrderByClause) new SortTermsImpl(rawTree, prefixMap));
} catch (RecognitionException e) {
throw new ParseException(e);
}
}
