private void CompareNodeChildren(IModelObject original, IModelObject @new, IList <ObjectRepositoryEntryChanges> changes, Stack <string> stack, ChildPropertyInfo childProperty)
{
using (var enumerator = new TwoSequenceEnumerator <IModelObject>(
childProperty.Accessor(original),
childProperty.Accessor(@new)))
{
while (!enumerator.BothCompleted)
{
CompareNodeChildren(changes, stack, enumerator);
}
}
}
private void CompareNodeChildren(IList <ObjectRepositoryEntryChanges> changes, Stack <string> stack, TwoSequenceEnumerator <IModelObject> enumerator)
{
if (enumerator.NodeIsStillThere)
{
stack.Push(enumerator.Left.Id.ToString());
CompareNode(enumerator.Left, enumerator.Right, changes, stack);
stack.Pop();
enumerator.MoveNextLeft();
enumerator.MoveNextRight();
return;
}
else if (enumerator.NodeHasBeenAdded)
{
stack.Push(enumerator.Right.Id.ToString());
AddNodeRecursively(enumerator.Right, changes, stack, (p, n) => new ObjectRepositoryEntryChanges(p, ChangeKind.Added, @new: n));
stack.Pop();
enumerator.MoveNextRight();
return;
}
else if (enumerator.NodeHasBeenRemoved)
{
stack.Push(enumerator.Left.Id.ToString());
AddNodeRecursively(enumerator.Left, changes, stack, (p, n) => new ObjectRepositoryEntryChanges(p, ChangeKind.Deleted, old: n));
stack.Pop();
enumerator.MoveNextLeft();
return;
}
throw new NotSupportedException("Unexpected child changes.");
}