public static Expression Clean(Expression expression)
{
Expression expand = ExpressionCleaner.Clean(expression, MetaEvaluator.PartialEval, false);
Expression simplified = OverloadingSimplifier.Simplify(expand);
return(simplified);
}
protected override Expression VisitConstant(ConstantExpression c)
{
if (disableQueryFilter)
{
return(base.VisitConstant(c));
}
if (typeof(IQueryable).IsAssignableFrom(c.Type))
{
IQueryable query = (IQueryable)c.Value;
if (query.IsBase())
{
Type queryType = c.Type.GetGenericArguments().SingleEx();
if (filter)
{
if (typeof(Entity).IsAssignableFrom(queryType))
{
LambdaExpression?rawFilter = giFilter.GetInvoker(queryType)(Schema.Current);
if (rawFilter != null)
{
Expression clean = ExpressionCleaner.Clean(rawFilter) !;
var cleanFilter = (LambdaExpression)OverloadingSimplifier.Simplify(clean) !;
return(Expression.Call(miWhere.MakeGenericMethod(queryType), query.Expression, cleanFilter));
}
}
else if (queryType.IsInstantiationOf(typeof(MListElement <,>)))
{
Type entityType = queryType.GetGenericArguments()[0];
LambdaExpression?rawFilter = giFilter.GetInvoker(entityType)(Schema.Current);
if (rawFilter != null)
{
var param = Expression.Parameter(queryType, "mle");
var lambda = Expression.Lambda(Expression.Invoke(rawFilter, Expression.Property(param, "Parent")), param);
Expression clean = ExpressionCleaner.Clean(lambda) !;
var cleanFilter = (LambdaExpression)OverloadingSimplifier.Simplify(clean) !;
return(Expression.Call(miWhere.MakeGenericMethod(queryType), query.Expression, cleanFilter));
}
}
}
return(c);
}
else
{
/// <summary>
/// Replaces every expression like ConstantExpression{ Type = IQueryable, Value = complexExpr } by complexExpr
/// </summary>
return(DbQueryProvider.Clean(query.Expression, filter, null) !);
}
}
return(base.VisitConstant(c));
}
public static Expression?Clean(Expression?expression, bool filter, HeavyProfiler.Tracer?log)
{
Expression?clean = ExpressionCleaner.Clean(expression);
log.Switch("OvrLdSmp");
Expression?simplified = OverloadingSimplifier.Simplify(clean);
log.Switch("QrFlr");
Expression?filtered = QueryFilterer.Filter(simplified, filter);
return(filtered);
}
