// compare one row versus the filters
public static bool Evaluate(RevisionDataFields items, RevisionFilters filters)
{
// scan through the list of filter tests to determine if
// the provided information passes
// return true if this item meets all of the criteria
// return false if any part of this item does not meet the criteria
if (filters == null || items == null)
{
throw new ArgumentNullException();
}
if (filters.Count == 0 || items.Count == 0)
{
return(false);
}
bool result = false;
// compare the data item referenced in the filter to the filter criteria
// the filters are in a outer (data enum) order
// each data item field could have multiple criteria filters
// inner loop is an 'or' loop - that is, if any of the inner
// filters are true, the whole inner filter is true. for conflicts
// that is, filtering the same item in opposite ways (e.g. is true and is false)
// a true will supersede a false
//
// the outer loop is the opposite
// it is an 'and' loop - a single false and the data row fails
foreach (KeyValuePair <DataItems.FilterEnum, RevisionFilters.Filters> kvpOuter in filters)
{
foreach (KeyValuePair <int, RevisionFilters.Criteria> kvpInner in kvpOuter.Value)
{
if (kvpInner.Value.CompareOpr == RevisionFilters.ECompareOps.ANY)
{
result = true;
}
else
{
// evaluate the actual revision data versus the test criteria
result = Verify(items[kvpOuter.Key.DataIdx], kvpInner.Value);
}
if (result)
{
break;
}
}
if (!result)
{
break;
}
}
return(result);
}
// from data manager's primary list,
// select those records that match the
// filter criteria
public static bool Select(RevisionFilters filters)
{
if (_preSelected.Count == 0)
{
return(false);
}
// start with empty and add to this
ClearSelected();
foreach (RevisionDataFields kvp in _preSelected)
{
if (RevisionSelect.Evaluate(kvp, filters))
{
_selected.Add(kvp);
}
}
return(_selected.Count != 0);
}