private IChangeSet <T> UpdateResultList(IChangeSet <T> changes, List <ReferenceCountTracker <T> > sourceLists, ChangeAwareListWithRefCounts <T> resultList)
{
//child caches have been updated before we reached this point.
foreach (var change in changes.Flatten())
{
var item = change.Current;
var isInResult = resultList.Contains(item);
var shouldBeInResult = MatchesConstraint(sourceLists, item);
if (shouldBeInResult)
{
if (!isInResult)
{
resultList.Add(item);
}
else if (change.Reason == ListChangeReason.Refresh)
{
resultList.Refresh(change.Current);
}
}
else
{
if (isInResult)
{
resultList.Remove(item);
}
}
}
return(resultList.CaptureChanges());
}
private void UpdateItemMembership(T item, List <ReferenceCountTracker <T> > sourceLists, ChangeAwareListWithRefCounts <T> resultList)
{
var isInResult = resultList.Contains(item);
var shouldBeInResult = MatchesConstraint(sourceLists, item);
if (shouldBeInResult && !isInResult)
{
resultList.Add(item);
}
else if (!shouldBeInResult && isInResult)
{
resultList.Remove(item);
}
}
private void ProcessItem(MergeContainer[] sourceLists, ChangeAwareListWithRefCounts <T> resultingList, T item)
{
//check whether the item should be removed from the list
var isInResult = resultingList.Contains(item);
var shouldBeInResult = MatchesConstraint(sourceLists, item);
if (shouldBeInResult)
{
if (!isInResult)
{
resultingList.Add(item);
}
}
else
{
if (isInResult)
{
resultingList.Remove(item);
}
}
}