private static void PerformMerge <TSubject, TApplyTo>(ICollection <IPatternApplier <TSubject, TApplyTo> > destination, IPatternApplier <TSubject, TApplyTo> applier)
{
var applierType = applier.GetType();
if (IsDelegatedApplier(applierType) || !destination.Any(a => a.GetType() == applierType))
{
destination.Add(applier);
}
}
private static void PerformUnionWith <TSubject, TApplyTo>(ICollection <IPatternApplier <TSubject, TApplyTo> > destination, IPatternApplier <TSubject, TApplyTo> applier)
{
var applierType = applier.GetType();
var existingAppliers = destination.Where(a => a.GetType().Name == applierType.Name && !IsDelegatedApplier(applierType)).ToList();
if (existingAppliers.Count > 0)
{
foreach (var existingApplier in existingAppliers)
{
destination.Remove(existingApplier);
}
}
destination.Add(applier);
}