private static void ParseGroupBy(string apply, QuerySpec spec, TableSpec tabSpec)
{
if (string.IsNullOrEmpty(apply))
{
return;
}
var lexer = new ODataTranslatorLexer(new AntlrInputStream(apply), tabSpec, spec);
CommonTokenStream tokens = new CommonTokenStream(lexer);
// Pass the tokens to the parser
var parser = new ODataTranslatorParser(tokens, tabSpec, spec);
// Run root rule ("apply" in this grammar)
parser.apply();
if (parser.Aggregates.Count == 0)
{
_log.ErrorFormat("Cannot extract agregates from $apply= {apply} value. ", apply);
throw new ArgumentException("Cannot parse $apply operator.", "$apply");
}
spec.select = parser.GroupBy;
foreach (var a in parser.Aggregates)
{
spec.select += ((spec.select == null) ?"":",") + a.AggregateColumnAlias + "=" + a.AggregateMethod + "(" + a.AggregateColumn + ")";
}
spec.groupBy = parser.GroupBy;
}
private static void ParseSearch(string filter, QuerySpec spec, TableSpec tabSpec)
{
if (!string.IsNullOrWhiteSpace(filter))
{
var lexer = new ODataTranslatorLexer(new AntlrInputStream(filter), tabSpec, spec);
var predicate = new StringBuilder();
while (!lexer._hitEOF)
{
var token = lexer.NextToken();
predicate.Append(token.Text);
}
spec.predicate = predicate.ToString();
}
}
private static void ParseExpand(StringValues expand, QuerySpec spec, TableSpec tabSpec)
{
if (string.IsNullOrEmpty(expand))
{
return;
}
var lexer = new ODataTranslatorLexer(new AntlrInputStream(expand), tabSpec, spec);
CommonTokenStream tokens = new CommonTokenStream(lexer);
// Pass the tokens to the parser
var parser = new ODataTranslatorParser(tokens, tabSpec, spec);
spec.expand = new System.Collections.Generic.Dictionary <string, QuerySpec>();
// Run rule "expandItems" in this grammar
parser.expandItems();
spec.expand = parser.Relations;
}
private static void ParseOrderBy(TableSpec tabSpec, string orderby, QuerySpec spec)
{
if (!string.IsNullOrWhiteSpace(orderby))
{
spec.order = new Hashtable();
foreach (var colDir in orderby.Split(','))
{
string dir = "asc", column = colDir;
if (colDir.EndsWith(" desc"))
{
dir = "desc";
column = colDir.Substring(0, colDir.Length - 5).Trim();
}
else if (colDir.EndsWith(" asc"))
{
column = colDir.Substring(0, colDir.Length - 4).Trim();
}
if (EnableODataExtensions)
{
var lexer = new ODataTranslatorLexer(new AntlrInputStream(column), tabSpec, spec);
CommonTokenStream tokens = new CommonTokenStream(lexer);
// Pass the tokens to the parser
var parser = new ODataTranslatorParser(tokens, tabSpec, spec);
parser.ErrorHandler = FastFail;
var orderBy = parser.orderBy();
column = orderBy.Expression + " " + orderBy.Direction;
if (string.IsNullOrWhiteSpace(column))
{
_log.ErrorFormat("Cannot extract order by clause from $orderby= {orderby} value. ", orderby);
throw new ArgumentException("Cannot parse $orderby parameter.", "$orderby");
}
}
else
{
tabSpec.HasColumn(column);
}
spec.order.Add(column, dir);
}
spec.IsOrderClauseValidated = true;
}
}
