private void processSpace(Building building, IfcSpace ifcSpace) throws SerializerException {
   Room room = new Room();
   setName(room.getName(), ifcSpace.getName());
   setGlobalId(room, ifcSpace);
   convertedObjects.put(ifcSpace, room);
   MultiSurfaceProperty multiSurfaceProperty = new MultiSurfaceProperty();
   MultiSurface ms = new MultiSurface();
   multiSurfaceProperty.setMultiSurface(ms);
   room.setLod4MultiSurface(multiSurfaceProperty);
   InteriorRoomProperty createInteriorRoomProperty = new InteriorRoomProperty();
   createInteriorRoomProperty.setObject(room);
   building.addInteriorRoom(createInteriorRoomProperty);
   setGeometry(ms, ifcSpace);
   for (IfcRelSpaceBoundary boundary : ifcSpace.getBoundedBy()) {
     if (!convertedObjects.containsKey(boundary.getRelatedBuildingElement())) {
       processBoundary(
           building,
           room,
           boundary.getRelatedBuildingElement(),
           boundary.getInternalOrExternalBoundary());
     }
   }
   for (IfcRelContainedInSpatialStructure contains : ifcSpace.getContainsElements()) {
     for (IfcProduct ifcProduct : contains.getRelatedElements()) {
       if (!convertedObjects.containsKey(ifcProduct)) {
         processBoundary(building, room, ifcProduct, null);
       }
     }
   }
 }
  public static void main(String[] args) {
    try {
      PluginManager pluginManager = LocalDevPluginLoader.createPluginManager(new File("home"));
      DeserializerPlugin deserializerPlugin =
          pluginManager.getFirstDeserializer("ifc", Schema.IFC2X3TC1, true);

      Deserializer deserializer = deserializerPlugin.createDeserializer(null);
      deserializer.init(pluginManager.getMetaDataManager().getPackageMetaData("ifc2x3tc1"));

      IfcModelInterface model =
          deserializer.read(new File("../TestData/data/AC9R1-Haus-G-H-Ver2-2x3.ifc"));

      deserializer = deserializerPlugin.createDeserializer(null);
      deserializer.init(pluginManager.getMetaDataManager().getPackageMetaData("ifc2x3tc1"));
      IfcModelInterface furnishingModel = deserializer.read(new File("test.ifc"));

      model.fixOids(new IncrementingOidProvider());
      long oid = model.getHighestOid();
      IncrementingOidProvider oidProvider = new IncrementingOidProvider(oid + 1);

      IfcFurnishingElement picknick =
          (IfcFurnishingElement)
              furnishingModel.getByName(
                  Ifc2x3tc1Package.eINSTANCE.getIfcFurnishingElement(), "Picknik Bank");

      ModelHelper modelHelper =
          new ModelHelper(
              pluginManager.getMetaDataManager(),
              new HideAllInversesObjectIDM(
                  CollectionUtils.singleSet(Ifc2x3tc1Package.eINSTANCE),
                  pluginManager.requireSchemaDefinition("ifc2x3tc1")),
              model);

      IfcProductDefinitionShape representation =
          (IfcProductDefinitionShape) picknick.getRepresentation();
      IfcRepresentation surfaceModel = null;
      IfcRepresentation boundingBox = null;
      for (IfcRepresentation ifcRepresentation : representation.getRepresentations()) {
        IfcShapeRepresentation ifcShapeRepresentation = (IfcShapeRepresentation) ifcRepresentation;
        if (ifcShapeRepresentation.getRepresentationType().equals("SurfaceModel")) {
          surfaceModel = (IfcRepresentation) modelHelper.copy(ifcShapeRepresentation, false);
        } else if (ifcShapeRepresentation.getRepresentationType().equals("BoundingBox")) {
          boundingBox = (IfcRepresentation) modelHelper.copy(ifcShapeRepresentation, false);
        }
      }

      IfcOwnerHistory ownerHistory = null;
      List<IfcOwnerHistory> all = model.getAll(IfcOwnerHistory.class);
      if (all.size() > 0) {
        ownerHistory = all.get(0);
      }

      for (IfcBuildingStorey ifcBuildingStorey : model.getAll(IfcBuildingStorey.class)) {
        for (IfcRelDecomposes ifcRelDecomposes : ifcBuildingStorey.getIsDecomposedBy()) {
          for (IfcObjectDefinition ifcObjectDefinition : ifcRelDecomposes.getRelatedObjects()) {
            if (ifcObjectDefinition instanceof IfcSpace) {
              IfcSpace ifcSpace = (IfcSpace) ifcObjectDefinition;
              //							IfcProductDefinitionShape slabRepr = (IfcProductDefinitionShape)
              // ifcSpace.getRepresentation();
              //							IfcBoundingBox box = null;
              //							for (IfcRepresentation representation2 : slabRepr.getRepresentations()) {
              //								IfcShapeRepresentation shapeRepresentation =
              // (IfcShapeRepresentation)representation2;
              //								if (shapeRepresentation.getRepresentationType().equals("BoundingBox")) {
              //									for (IfcRepresentationItem i2 : shapeRepresentation.getItems()) {
              //										box = (IfcBoundingBox)i2;
              //									}
              //								}
              //							}

              IfcFurnishingElement newFurnishing =
                  model.create(IfcFurnishingElement.class, oidProvider);

              IfcRelContainedInSpatialStructure containedInSpatialStructure2 =
                  model.create(IfcRelContainedInSpatialStructure.class, oidProvider);
              containedInSpatialStructure2.setRelatingStructure(ifcBuildingStorey);
              containedInSpatialStructure2.getRelatedElements().add(newFurnishing);

              newFurnishing.setName("Generated");
              newFurnishing.setGlobalId("TEST");
              newFurnishing.setOwnerHistory(ownerHistory);
              IfcProductDefinitionShape definitionShape =
                  model.create(IfcProductDefinitionShape.class, oidProvider);
              newFurnishing.setRepresentation(definitionShape);

              definitionShape.getRepresentations().add(boundingBox);
              definitionShape.getRepresentations().add(surfaceModel);

              IfcLocalPlacement localPlacement = model.create(IfcLocalPlacement.class, oidProvider);
              localPlacement.setPlacementRelTo(ifcSpace.getObjectPlacement());
              IfcAxis2Placement3D axis2Placement3D =
                  model.create(IfcAxis2Placement3D.class, oidProvider);
              localPlacement.setRelativePlacement(axis2Placement3D);

              IfcCartesianPoint pos = model.create(IfcCartesianPoint.class, oidProvider);
              pos.getCoordinates().add(-3d);
              pos.getCoordinates().add(+0.5d);
              pos.getCoordinates().add(0d);
              axis2Placement3D.setLocation(pos);

              newFurnishing.setObjectPlacement(localPlacement);
            }
          }
        }
      }

      model.resetExpressIds();

      SerializerPlugin serializerPlugin =
          pluginManager.getSerializerPlugin(
              "org.bimserver.ifc.step.serializer.IfcStepSerializerPlugin", true);
      Serializer serializer = serializerPlugin.createSerializer(null);
      serializer.init(model, null, pluginManager, null, null, true);
      serializer.writeToFile(new File("withfurn.ifc"), null);
    } catch (PluginException e) {
      e.printStackTrace();
    } catch (DeserializeException e) {
      e.printStackTrace();
    } catch (IfcModelInterfaceException e) {
      e.printStackTrace();
    } catch (SerializerException e) {
      e.printStackTrace();
    }
  }