public Tuple <Dictionary <long, long>, List <long>, List <long> > ApplyUpdate(Delta delta)
{
rwLock.EnterWriteLock();
try
{
Dictionary <DMSType, int> counters = new Dictionary <DMSType, int>(this.counters);
Dictionary <long, long> ids = delta.ResolveIds(x => counters.ContainsKey(x) ? (counters[x] = counters[x] + 1) : -1);
if (ids == null)
{
return(null);
}
delta.SortOperations();
HashSet <long> toValidate = new HashSet <long>();
List <IdentifiedObject> inserted = new List <IdentifiedObject>();
List <IdentifiedObject> updatedOld = new List <IdentifiedObject>();
List <IdentifiedObject> updatedNew = new List <IdentifiedObject>();
List <IdentifiedObject> deleted = new List <IdentifiedObject>();
Func <long, IdentifiedObject> entityGetter = x => { IdentifiedObject y; TryGetEntity(x, out y); return(y); };
foreach (ResourceDescription rd in delta.InsertOperations)
{
IdentifiedObject io = InsertEntity(rd);
if (io == null)
{
return(null);
}
toValidate.Add(io.GID);
io.GetEntitiesToValidate(entityGetter, toValidate);
inserted.Add(io);
}
foreach (ResourceDescription rd in delta.UpdateOperations)
{
Tuple <IdentifiedObject, IdentifiedObject> io = UpdateEntity(rd);
if (io == null)
{
return(null);
}
toValidate.Add(io.Item1.GID);
io.Item1.GetEntitiesToValidate(entityGetter, toValidate);
io.Item2.GetEntitiesToValidate(entityGetter, toValidate);
updatedOld.Add(io.Item1);
updatedNew.Add(io.Item2);
}
foreach (ResourceDescription rd in delta.DeleteOperations)
{
IdentifiedObject io = DeleteEntity(rd);
if (io == null)
{
return(null);
}
toValidate.Add(io.GID);
io.GetEntitiesToValidate(entityGetter, toValidate);
deleted.Add(io);
}
foreach (long gid in toValidate)
{
IdentifiedObject io;
if (!TryGetEntity(gid, out io))
{
continue;
}
if (!io.Validate(entityGetter))
{
return(null);
}
}
if (db != null)
{
this.inserted = inserted;
this.updatedOld = updatedOld;
this.updatedNew = updatedNew;
this.deleted = deleted;
this.oldCounters = this.counters;
}
this.counters = counters;
return(new Tuple <Dictionary <long, long>, List <long>, List <long> >(ids, updatedOld.Select(x => x.GID).ToList(), deleted.Select(x => x.GID).ToList()));
}
finally
{
rwLock.ExitWriteLock();
}
}