/// <summary>
/// Creates and indexes an area defined for the server.
/// </summary>
private AreaState CreateAndIndexAreas(AreaState parent, AreaConfiguration configuration)
{
// create a unique path to the area.
string areaPath = Utils.Format("{0}/{1}", (parent != null)?parent.SymbolicName:String.Empty, configuration.Name);
NodeId areaId = ModelUtils.ConstructIdForArea(areaPath, NamespaceIndex);
// create the object that will be used to access the area and any variables contained within it.
AreaState area = new AreaState(SystemContext, parent, areaId, configuration);
m_areas[areaPath] = area;
if (parent != null)
{
parent.AddChild(area);
}
// create an index any sub-areas defined for the area.
if (configuration.SubAreas != null)
{
for (int ii = 0; ii < configuration.SubAreas.Count; ii++)
{
CreateAndIndexAreas(area, configuration.SubAreas[ii]);
}
}
// add references to sources.
if (configuration.SourcePaths != null)
{
for (int ii = 0; ii < configuration.SourcePaths.Count; ii++)
{
string sourcePath = configuration.SourcePaths[ii];
// check if the source already exists because it is referenced by another area.
SourceState source = null;
if (!m_sources.TryGetValue(sourcePath, out source))
{
NodeId sourceId = ModelUtils.ConstructIdForSource(sourcePath, NamespaceIndex);
m_sources[sourcePath] = source = new SourceState(this, sourceId, sourcePath);
}
// HasEventSource and HasNotifier control the propagation of event notifications so
// they are not like other references. These calls set up a link between the source
// and area that will cause events produced by the source to be automatically
// propagated to the area.
source.AddNotifier(SystemContext, ReferenceTypeIds.HasEventSource, true, area);
area.AddNotifier(SystemContext, ReferenceTypeIds.HasEventSource, false, source);
}
}
return(area);
}
/// <summary>
/// Creates the NodeId for the specified node.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="node">The node.</param>
/// <returns>The new NodeId.</returns>
/// <remarks>
/// This method is called by the NodeState.Create() method which initializes a Node from
/// the type model. During initialization a number of child nodes are created and need to
/// have NodeIds assigned to them. This implementation constructs NodeIds by constructing
/// strings. Other implementations could assign unique integers or Guids and save the new
/// Node in a dictionary for later lookup.
/// </remarks>
public override NodeId New(ISystemContext context, NodeState node)
{
return(ModelUtils.ConstructIdForComponent(node, NamespaceIndex));
}