private Priority GetPriorityOfProductionOrderOperation(DueTime now,
ProductionOrderOperation givenProductionOrderOperation,
DueTime minStartNextOfParentProvider)
{
IAggregator aggregator = ZppConfiguration.CacheManager.GetAggregator();
Dictionary <HierarchyNumber, DueTime> alreadySummedHierarchyNumbers =
new Dictionary <HierarchyNumber, DueTime>();
DueTime sumDurationsOfOperations = DueTime.Zero();
// O(1)
List <ProductionOrderOperation> productionOrderOperations =
aggregator.GetProductionOrderOperationsOfProductionOrder(givenProductionOrderOperation
.GetProductionOrderId());
foreach (var productionOrderOperation in productionOrderOperations)
{
// only later operations, which have a smaller hierarchyNumber, have to be considered
if (productionOrderOperation.GetHierarchyNumber()
.IsSmallerThan(givenProductionOrderOperation.GetHierarchyNumber()))
{
continue;
}
if (alreadySummedHierarchyNumbers.ContainsKey(productionOrderOperation
.GetHierarchyNumber()))
{
DueTime alreadySummedHierarchyNumber =
alreadySummedHierarchyNumbers[
productionOrderOperation.GetHierarchyNumber()];
if (productionOrderOperation.GetDuration().ToDueTime()
.IsGreaterThan(alreadySummedHierarchyNumber))
{
sumDurationsOfOperations.IncrementBy(productionOrderOperation.GetDuration()
.ToDueTime().Minus(alreadySummedHierarchyNumber));
}
}
else
{
alreadySummedHierarchyNumbers.Add(productionOrderOperation.GetHierarchyNumber(),
productionOrderOperation.GetDuration().ToDueTime());
}
}
return(new Priority(minStartNextOfParentProvider.Minus(now)
.Minus(sumDurationsOfOperations).GetValue()));
}