/// <summary>
/// Accepts the specified visitor and allow it to visit every node of the
/// tree.
/// </summary>
/// <param name="visitor">The visitor to accepts.</param>
/// <param name="reverse">A value indicating if the elements will be visit
/// in the reverse order or not.</param>
/// <param name="state">A user-defined object that qualifies or contains
/// information about the visitor's current state.</param>
/// <exception cref="ArgumentNullException"><paramref name="visitor"/> is
/// a null reference</exception>
public void Accept(InOrderVisitor <TValue> visitor, object state,
bool reverse)
{
if (visitor == null)
{
throw new ArgumentNullException("visitor");
}
TreeWalkAction <TKey, TValue> on_tree_walk =
new TreeWalkAction <TKey, TValue>(
delegate(AndersonTreeNode <TKey, TValue> node)
{
visitor.Visit(node.Value, state);
return(!visitor.IsCompleted);
});
if (reverse)
{
ReverseInOrderTreeWalk(on_tree_walk);
}
else
{
InOrderTreeWalk(on_tree_walk);
}
}
public void ShouldVisitEachNodeInDescendingOrder()
{
AndersonTree <int, int> tree = new AndersonTree <int, int>();
Stack <int> data = new Stack <int>(10);
for (int i = 0; i < 10; i++)
{
data.Push(i * 10);
tree.Add(i * 10, i * 10);
}
var visitor =
new InOrderVisitor <int, int>(
new Visitor <int, int>(
(key, value, state) => Assert.AreEqual(data.Pop(), value)));
tree.Accept(visitor, true);
}
public void ShouldVisitEachNodeInAscendingOrder()
{
AndersonTree <int, int> tree = new AndersonTree <int, int>();
Queue <int> data = new Queue <int>(10);
for (int i = 0; i < 10; i++)
{
data.Enqueue(i * 10);
tree.Add(i * 10, i * 10);
}
var visitor =
new InOrderVisitor <int, int>(
new Visitor <int, int>(
(key, value, state) => Assert.AreEqual(data.Dequeue(), value)));
tree.Accept(visitor, false);
}
/// <summary>
/// Accepts the specified visitor and allow it to visit every node of the
/// tree.
/// </summary>
/// <param name="visitor">
/// The visitor to accepts.
/// </param>
/// <param name="reverse">
/// A value indicating if the elements will be visit in the reverse order
/// or not.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="visitor"/> is a<c>null</c> reference.
/// </exception>
public void Accept(InOrderVisitor <TValue> visitor, bool reverse)
{
Accept(visitor, null, reverse);
}