/// <summary>
/// Traverses Depth-First through the bpmn XML file, collecting and linking all Elements.
/// </summary>
/// <param name="xNode">The XML node to start with</param>
/// <param name="parent">The parent <see cref="BpmnElement"/></param>
/// <param name="callingElements">A list to add all <see cref="BpmnElement"/> with a valid 'CalledElement' or 'Process' property.</param>
private void RecursiveElements(XElement xNode, BpmnElement parent, ICollection <BpmnElement> callingElements)
{
var element = new BpmnElement(xNode);
if (element.CalledElement != null)
{
callingElements.Add(element);
}
else if (element.Process != null)
{
callingElements.Add(element);
}
// Only xml nodes with an id can be bpmn elements
if (element.Id != null)
{
try {
Elements.Add(element.Id, element);
// some tools prefix the ids with a namespace prefix but don't use this namespace to reference it
// so if the id contains a prefix, it is mapped with and without it
var prefix = xNode.GetPrefixOfNamespace(xNode.Name.Namespace);
if (prefix != null)
{
Elements.Add(prefix + ":" + element.Id, element);
}
} catch (ArgumentException) {
Messages.Add("Error while trying to add second Element with the same id: " + element.Id);
}
}
// Double-link bpmn element to the given parent element
if (parent != null)
{
parent.AddChild(element);
}
element.Parent = parent;
// Call all xml children
foreach (var xChild in xNode.Elements())
{
var nameSpace = xChild.Name.Namespace;
var localName = xChild.Name.LocalName;
if (nameSpace.Equals(BpmnNM.Bpmn))
{
// Add all bpmn elements to the dictionary
RecursiveElements(xChild, element, callingElements);
}
else if (nameSpace.Equals(BpmnNM.BpmnDi))
{
// Parse a diagram as whole
if (localName == BpmnDiConstants.BpmnDiagramElement)
{
var diagram = BuildDiagram(xChild);
if (diagram.Plane != null)
{
Diagrams.Add(diagram);
}
else
{
Messages.Add("The plane for diagram + " + diagram.Id + " was not correctly parsed.");
}
}
}
else
{
element.ForeignChildren.Add(xChild);
}
}
}
