public TypedData Process(TypedData data, IMutableProgressTracker progress, CancellationToken cancelToken)
{
// ToList is needed to prevent new MPT's from being
// created for each loop of commandProgressTrackers
var commandProgressTrackers = this.commands.Select((command) => new {
ProgressTracker = new MutableProgressTracker(),
Command = command
}).ToList();
var aggregateProgress = new AggregateProgressTracker(commandProgressTrackers.Select(
(cpt) => new ProgressTrackerCollectionItem(
cpt.ProgressTracker,
cpt.Command.ProcessTimeEstimate.ProgressWeight
)
));
aggregateProgress.BindTo(progress);
bool shouldDisposeData = false;
foreach (var cpt in commandProgressTrackers) {
cancelToken.ThrowIfCancellationRequested();
TypedData newData;
try {
cancelToken.ThrowIfCancellationRequested();
if (!cpt.Command.IsValid()) {
throw new CommandInvalidException(cpt.Command);
}
newData = cpt.Command.Process(data, cpt.ProgressTracker, cancelToken);
cancelToken.ThrowIfCancellationRequested();
} finally {
if (shouldDisposeData && data != null) {
data.Dispose();
}
}
data = newData;
shouldDisposeData = true;
}
return data;
}
