private void InitializePriorityQueue(IList <IEnumerable <T> > inputList)
{
foreach (var list in inputList)
{
ComparableSortedSequenceEnumerator <T> enumerator = new ComparableSortedSequenceEnumerator <T>(list, this.keyComparer);
bool enumeratorIsNotEmpty = this.PrepareEnumerator(enumerator);
if (enumeratorIsNotEmpty == false)
{
// Since enumerator does not have any items that fit the filter, discard the enumerator.
enumerator.Dispose();
continue;
}
this.InsertToPriortyQueueIfNecessary(enumerator);
}
}
private bool InsertToPriortyQueueIfNecessary(ComparableSortedSequenceEnumerator <T> enumerator)
{
Diagnostics.Assert(enumerator != null, ClassName, "Input enumerator must not be null.");
while (true)
{
bool wasPushed = this.priorityQueue.TryPush(enumerator);
if (wasPushed)
{
return(true);
}
var isNotEmpty = enumerator.MoveNext();
if (isNotEmpty == false)
{
enumerator.Dispose();
return(false);
}
}
}
