/// <summary>
/// Processes IfcGroup handle.
/// </summary>
/// <param name="ifcGroup">The IfcGroup handle.</param>
/// <returns>The IFCGroup object.</returns>
public static IFCGroup ProcessIFCGroup(IFCAnyHandle ifcGroup)
{
if (IFCAnyHandleUtil.IsNullOrHasNoValue(ifcGroup))
{
Importer.TheLog.LogNullError(IFCEntityType.IfcGroup);
return(null);
}
IFCEntity cachedIFCGroup;
IFCImportFile.TheFile.EntityMap.TryGetValue(ifcGroup.StepId, out cachedIFCGroup);
if (cachedIFCGroup != null)
{
return(cachedIFCGroup as IFCGroup);
}
if (IFCAnyHandleUtil.IsSubTypeOf(ifcGroup, IFCEntityType.IfcZone))
{
return(IFCZone.ProcessIFCZone(ifcGroup));
}
if (IFCAnyHandleUtil.IsSubTypeOf(ifcGroup, IFCEntityType.IfcSystem))
{
return(IFCSystem.ProcessIFCSystem(ifcGroup));
}
return(new IFCGroup(ifcGroup));
}
/// <summary>
/// Top-level function that processes an IFC file for reference.
/// </summary>
/// <returns>True if the process is successful, false otherwise.</returns>
private bool ProcessReference()
{
InitializeOpenTransaction("Open IFC Reference File");
//If there is more than one project, we will be ignoring all but the first one.
IList <IFCAnyHandle> projects = IFCImportFile.TheFile.GetInstances(IFCEntityType.IfcProject, false);
if (projects.Count == 0)
{
Importer.TheLog.LogError(-1, "There were no IfcProjects found in the file. Aborting import.", false);
return(false);
}
IFCProject.ProcessIFCProject(projects[0]);
// The IFC toolkit relies on the IFC schema definition to read in the file. The schema definition has entities that have data fields,
// and INVERSE relationships. Unfortunately, the standard IFC 2x3 schema has a "bug" where one of the inverse relationships is missing.
// Normally we don't care all that much, but now we do. So if we don't allow using this inverse (because if we did, it would just constantly
// throw exceptions), we need another way to get the zones. This is the way.
// We are also using this to find IfcSystems that don't have the optional IfcRelServicesBuildings set.
if (!IFCImportFile.TheFile.Options.AllowUseHasAssignments)
{
IList <IFCAnyHandle> zones = IFCImportFile.TheFile.GetInstances(IFCEntityType.IfcZone, false);
foreach (IFCAnyHandle zone in zones)
{
IFCZone ifcZone = IFCZone.ProcessIFCZone(zone);
if (ifcZone != null)
{
OtherEntitiesToCreate.Add(ifcZone);
}
}
IList <IFCAnyHandle> systems = IFCImportFile.TheFile.GetInstances(IFCEntityType.IfcSystem, false);
foreach (IFCAnyHandle system in systems)
{
IFCSystem ifcSystem = IFCSystem.ProcessIFCSystem(system);
if (ifcSystem != null)
{
OtherEntitiesToCreate.Add(ifcSystem);
}
}
}
return(PostProcessReference());
}