/// <summary>
/// Creates and initializes a ConnectorModel from its Xml representation.
/// </summary>
/// <param name="connEl">XmlElement for a ConnectorModel.</param>
/// <param name="nodes">Dictionary to be used for looking up a NodeModel by it's Guid.</param>
/// <returns>Returns the new instance of ConnectorModel loaded from XmlElement.</returns>
public static ConnectorModel LoadConnectorFromXml(XmlElement connEl, IDictionary <Guid, NodeModel> nodes)
{
var helper = new XmlElementHelper(connEl);
var guid = helper.ReadGuid("guid", Guid.NewGuid());
var guidStart = helper.ReadGuid("start");
var guidEnd = helper.ReadGuid("end");
int startIndex = helper.ReadInteger("start_index");
int endIndex = helper.ReadInteger("end_index");
bool isHidden = helper.HasAttribute(nameof(ConnectorModel.IsHidden)) ?
helper.ReadBoolean(nameof(ConnectorModel.IsHidden)) :
false;
//find the elements to connect
NodeModel start;
if (nodes.TryGetValue(guidStart, out start))
{
NodeModel end;
if (nodes.TryGetValue(guidEnd, out end))
{
var connector = ConnectorModel.Make(start, end, startIndex, endIndex, guid);
if (connector != null)
{
connector.IsHidden = isHidden;
return(connector);
}
}
}
return(null);
}
protected static IEnumerable<Guid> DeserializeGuid(XmlElement element, XmlElementHelper helper)
{
// Deserialize old type of commands
if (helper.HasAttribute("ModelGuid"))
{
Guid modelGuid = helper.ReadGuid("ModelGuid", Guid.Empty);
return new[] { modelGuid };
}
if (helper.HasAttribute("NodeId"))
{
Guid modelGuid = helper.ReadGuid("NodeId", Guid.Empty);
return new[] { modelGuid };
}
return (from XmlNode xmlNode in element.ChildNodes
where xmlNode.Name.Equals("ModelGuid")
select Guid.Parse(xmlNode.InnerText)).ToArray();
}