private bool InternalValidate(Expr expr, Query query, out object trace)
{
trace = null;
RelationGraph.AddNode(query);
var queryExpr = new AGQueryExpr(expr, query);
queryExpr.RetrieveRenderKnowledge();
if (queryExpr.RenderKnowledge == null)
{
return(false);
}
if (queryExpr.RenderKnowledge.Count == 0)
{
return(false);
}
var agEquationExpr = queryExpr.RenderKnowledge[0] as AGEquationExpr;
if (agEquationExpr == null)
{
return(false);
}
agEquationExpr.IsSelected = true;
agEquationExpr.GenerateSolvingTrace();
if (agEquationExpr.AutoTrace == null)
{
return(false);
}
trace = agEquationExpr.AutoTrace;
RelationGraph.DeleteNode(query);
return(true);
}
/// <summary>
/// Relation Input Pattern Match
/// </summary>
/// <param name="expr"></param>
/// <param name="str"></param>
/// <param name="st"></param>
/// <param name="query"></param>
/// <param name="output"></param>
/// <returns></returns>
private bool EvalExprPatterns(Expr expr, Query query, out object output, bool userInput = false)
{
object obj = null;
if (!userInput)
{
obj = RelationGraph.AddNode(query);
}
output = new AGQueryExpr(expr, query);
return(obj != null);
//return EvalNonDeterministic(expr, obj, out output);
}