public override object VisitRestriction([NotNull] ChatParser.RestrictionContext context)
{
if (context.And() != null)
{
List <int> lhs = (List <int>)VisitRestriction(context.restriction(0));
List <int> rhs = (List <int>)VisitRestriction(context.restriction(1));
return(lhs.Intersect(rhs).ToList());
}
else if (context.Or() != null)
{
List <int> lhs = (List <int>)VisitRestriction(context.restriction(0));
List <int> rhs = (List <int>)VisitRestriction(context.restriction(1));
lhs.AddRange(rhs);
lhs.Sort();
return(lhs);
}
else if (context.Not() != null)
{
long tmp = LuceneService.DirReader.MaxDoc - 1;
int msgCount = 1000000;
if (msgCount > tmp)
{
msgCount = (int)tmp;
}
var numberList = Enumerable.Range(1, msgCount).ToList();
var excludeList = (List <int>)VisitRestriction(context.restriction(0));
return(numberList.Except(excludeList).ToList());
}
else if (context.condition() != null)
{
return(VisitCondition(context.condition()));
}
else
{
return(VisitRestriction(context.restriction(0)));
}
}
/// <summary>
/// Visit a parse tree produced by <see cref="ChatParser.restriction"/>.
/// <para>
/// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/>
/// on <paramref name="context"/>.
/// </para>
/// </summary>
/// <param name="context">The parse tree.</param>
/// <return>The visitor result.</return>
public virtual Result VisitRestriction([NotNull] ChatParser.RestrictionContext context)
{
return(VisitChildren(context));
}
