/// <summary>
/// Remove an element from the GUID to element id map, if its GUID is found in the map.
/// </summary>
/// <param name="elem">The element.</param>
public void UseElement(Element elem)
{
if (elem == null)
return;
string guid = IFCGUIDUtil.GetGUID(elem);
if (string.IsNullOrWhiteSpace(guid))
return;
GUIDToElementMap.Remove(guid);
}
/// <summary>
/// Reuse an element from the GUID to element map, in a reload operation, if it exists.
/// </summary>
/// <typeparam name="T">The type of element. We do type-checking for consistency.</typeparam>
/// <param name="document">The document.</param>
/// <param name="guid">The GUID.</param>
/// <returns>The element from the map.</returns>
public T UseElementByGUID<T>(Document document, string guid) where T : Element
{
T elementT = null;
ElementId elementId;
if (GUIDToElementMap.TryGetValue(guid, out elementId))
{
Element element = document.GetElement(elementId);
if (element is T)
{
elementT = element as T;
GUIDToElementMap.Remove(guid);
}
}
return elementT;
}