public override object VisitBody([NotNull] ChatParser.BodyContext context)
{
// Default window size is 70
int windowSize = 70;
if (context != null)
{
if (context.InWin() != null)
{
try
{
windowSize = Int32.Parse(context.number().GetText());
}
catch (FormatException)
{
MessageBox.Show("Incorrect query");
}
}
if (context.restrictions() != null)
{
// If query / subquery contains only restrictions -- we need only merge restrictions
// [x1...xn] -- result for restriction R1
// [y1...ym] -- result for restriction R2
// Select R1, R2 inwin W
// Result is vector of vectors [[xi, yj]] where 0 < yj - xi <= W
// So we have only one restriction group
var onlyRestrictions = (MsgGroups)VisitRestrictions(context.restrictions());
var mergedRestrcitions = MergeRestrictions(onlyRestrictions, windowSize);
return(OnlyRestrictionsToList(mergedRestrcitions));
}
else if (context.query_seq() != null)
{
// Now in this query subqueries only.
// Also we have invariant: results of son's query are calculated correctlly.
// It means that now we have only son's correct accomadation.
var subQueryResults = (List <List <MsgGroups> >)VisitQuery_seq(context.query_seq());
return(MergeQueries(subQueryResults, windowSize));
}
}
else
{
return(null);
}
return(null);
}
/// <summary>
/// Visit a parse tree produced by <see cref="ChatParser.body"/>.
/// <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 VisitBody([NotNull] ChatParser.BodyContext context)
{
return(VisitChildren(context));
}