/// <exception cref="NGit.Errors.MissingObjectException"></exception>
/// <exception cref="NGit.Errors.IncorrectObjectTypeException"></exception>
/// <exception cref="System.IO.IOException"></exception>
internal override RevCommit Next()
{
try
{
for (; ;)
{
RevCommit c = pending.Next();
if (c == null)
{
walker.reader.WalkAdviceEnd();
return(null);
}
bool produce;
if ((c.flags & UNINTERESTING) != 0)
{
produce = false;
}
else
{
if (filter.RequiresCommitBody())
{
c.ParseBody(walker);
}
produce = filter.Include(walker, c);
}
foreach (RevCommit p in c.parents)
{
if ((p.flags & SEEN) != 0)
{
continue;
}
if ((p.flags & PARSED) == 0)
{
p.ParseHeaders(walker);
}
p.flags |= SEEN;
pending.Add(p);
}
walker.CarryFlagsImpl(c);
if ((c.flags & UNINTERESTING) != 0)
{
if (pending.EverbodyHasFlag(UNINTERESTING))
{
RevCommit n = pending.Peek();
if (n != null && n.commitTime >= last.commitTime)
{
// This is too close to call. The next commit we
// would pop is dated after the last one produced.
// We have to keep going to ensure that we carry
// flags as much as necessary.
//
overScan = OVER_SCAN;
}
else
{
if (--overScan == 0)
{
throw StopWalkException.INSTANCE;
}
}
}
else
{
overScan = OVER_SCAN;
}
if (canDispose)
{
c.DisposeBody();
}
continue;
}
if (produce)
{
return(last = c);
}
else
{
if (canDispose)
{
c.DisposeBody();
}
}
}
}
catch (StopWalkException)
{
walker.reader.WalkAdviceEnd();
pending.Clear();
return(null);
}
}