/// <summary>
/// Calculate the transition losses that apply to a transition with
/// a specific type and cleavage offset for a single set of explicit losses.
/// </summary>
private static TransitionLosses CalcTransitionLosses(IonType type, int cleavageOffset,
MassType massType, IEnumerable <ExplicitLoss> losses)
{
List <TransitionLoss> listLosses = null;
foreach (var loss in losses)
{
if (!Transition.IsPrecursor(type))
{
if (Transition.IsNTerminal(type) && loss.IndexAA > cleavageOffset)
{
continue;
}
if (Transition.IsCTerminal(type) && loss.IndexAA <= cleavageOffset)
{
continue;
}
}
if (listLosses == null)
{
listLosses = new List <TransitionLoss>();
}
listLosses.Add(loss.TransitionLoss);
}
if (listLosses == null)
{
return(null);
}
return(new TransitionLosses(listLosses, massType));
}