public FilterElementPredicate <T> AppendChildPredicate(FilterElement filterEl)
{
FilterElementPredicateFactory <T> factory = new FilterElementPredicateFactory <T>();
FilterElementPredicate <T> childPredicate = factory.Create <FilterElementPredicate <T> >(filterEl);
if (childPredicate != null)
{
ChildPredicates.Add(childPredicate);
}
return(childPredicate);
}
private static void ConstructPredicate(FilterElementPredicate <DateTime> predicate, FilterElementCollection filterColl, string sourceName)
{
foreach (FilterElement filterEl in filterColl)
{
if (filterEl.HasChildElements)
{
//Создаем блок
predicate = predicate.AppendChildPredicate(filterEl);
//рекурсивно обрабатываем дочерние фильтры
ConstructPredicate(predicate, filterEl.ChildElements, sourceName);
}
if (filterEl.Source == sourceName)
{
predicate.AppendChildPredicate(filterEl);
}
}
}
FilterElementPredicate <T> IFactoryMethod <FilterElementPredicate <T> > .Create(object obj)
{
FilterElementPredicate <T> retVal = null;
FilterElement filterEl = obj as FilterElement;
if (filterEl != null)
{
if (filterEl.Type == FilterElementType.AndBlock)
{
retVal = new AndBlockFilterElementPredicate <T>();
foreach (FilterElement childFilterEl in filterEl.ChildElements)
{
retVal.AppendChildPredicate(childFilterEl);
}
}
if (filterEl.Type == FilterElementType.OrBlock)
{
retVal = new OrBlockFilterElementPredicate <T>();
foreach (FilterElement childFilterEl in filterEl.ChildElements)
{
retVal.AppendChildPredicate(childFilterEl);
}
}
else
{
IComparable <T> filterValue = TryConvertFilterValue(filterEl.Value) as IComparable <T>;
if (filterValue != null)
{
Func <T, bool> functor = null;
switch (filterEl.Type)
{
case FilterElementType.Equal:
functor = delegate(T obj1) { return(filterValue.CompareTo(obj1) == 0); };
break;
case FilterElementType.NotEqual:
functor = delegate(T obj1) { return(filterValue.CompareTo(obj1) != 0); };
break;
case FilterElementType.Less:
functor = delegate(T obj1) { return(filterValue.CompareTo(obj1) > 0); };
break;
case FilterElementType.LessOrEqual:
functor = delegate(T obj1) { return(filterValue.CompareTo(obj1) >= 0); };
break;
case FilterElementType.Greater:
functor = delegate(T obj1) { return(filterValue.CompareTo(obj1) < 0); };
break;
case FilterElementType.GreaterOrEqual:
functor = delegate(T obj1) { return(filterValue.CompareTo(obj1) <= 0); };
break;
}
if (functor != null)
{
retVal = new FilterElementPredicate <T>(filterEl, functor);
}
}
}
}
return(retVal);
}
