@Override public Object visiteCategories(final NodeCategories parent, final Object data) { if (data instanceof ObjManifestation) { final ObjManifestation manif = (ObjManifestation) data; for (int i = 0; i < parent.getNumChild(); i++) { final ObjCategorie cat = (ObjCategorie) parent.getChild(i).accept(this, data); manif.addCategorie(cat); } } if (data instanceof ObjStep) { final ObjStep step = (ObjStep) data; for (int i = 0; i < parent.getNumChild(); i++) { final ObjCategorie cat = (ObjCategorie) parent.getChild(i).accept(this, data); step.addFiltreCategory(cat); } } return null; }