/// <summary>
/// Pushes a collection onto the stack.
/// </summary>
/// <param name="collection">The collection to push.</param>
private void PushCollection(ElementCollection collection)
{
if (collection.Count <= 0)
{
throw new ArgumentException(String.Format(
CultureInfo.InvariantCulture,
"Collection has {0} elements. Must have at least one.",
collection.Count));
}
CollectionTuple tuple = new CollectionTuple(collection);
this.collectionStack.Push(tuple);
this.FindNext(tuple);
}
/// <summary>
/// Creates a new CollectionTuple.
/// </summary>
/// <param name="collection">The collection for the tuple.</param>
public CollectionTuple(ElementCollection collection)
{
this.collection = collection;
}
/// <summary>
/// Adds a nested collection to this collection.
/// </summary>
/// <param name="collection">ElementCollection to add.</param>
internal void AddCollection(ElementCollection collection)
{
this.items.Add(collection);
}
/// <summary>
/// Creates a new ElementCollectionEnumerator.
/// </summary>
/// <param name="collection">The collection to create an enumerator for.</param>
public ElementCollectionEnumerator(ElementCollection collection)
{
this.collection = collection;
}
/// <summary>
/// Removes a child element from this collection.
/// </summary>
/// <param name="element">The element to remove.</param>
/// <exception cref="ArgumentException">Thrown if the element is not of an allowed type.</exception>
public void RemoveElement(ISchemaElement element)
{
foreach (object obj in this.items)
{
CollectionItem collectionItem = obj as CollectionItem;
if (collectionItem != null)
{
if (collectionItem.ElementType.IsAssignableFrom(element.GetType()))
{
if (collectionItem.Elements.Count == 0)
{
return;
}
collectionItem.RemoveElement(element);
if (collectionItem.Elements.Count == 0)
{
this.containersUsed--;
}
this.totalContainedItems--;
return;
}
continue;
}
ElementCollection collection = obj as ElementCollection;
if (collection != null)
{
if (collection.Count == 0)
{
continue;
}
try
{
collection.RemoveElement(element);
if (collection.Count == 0)
{
this.containersUsed--;
}
this.totalContainedItems--;
return;
}
catch (ArgumentException)
{
// Eat the exception and keep looking. We'll throw our own if we can't find its home.
}
continue;
}
}
throw new ArgumentException(String.Format(
CultureInfo.InvariantCulture,
"Element of type {0} is not valid for this collection.",
element.GetType().Name));
}
