public static DataSet getApartmentsDataSet() throws Exception {
		DataSetSpecification spec = createApartmentsDataSetSpec();
		return new DataSetFactory().fromFile("apartments", spec, "\\s+");
	}

	public static DataSetSpecification createApartmentsDataSetSpec() {
		DataSetSpecification dss = new DataSetSpecification();
		dss.defineStringAttribute("zona", new String[] {"Centru", "Marasti", "Gheorgheni", "Buna-Ziua", "Zorilor", "Manastur", "Baciu", "Floresti", "Grigorescu"});
		dss.defineStringAttribute("nr_camere", new String[] {"1", "2", "3"});
		dss.defineStringAttribute("suprafata", new String[] {"mic", "mediu", "mare"});
		dss.defineStringAttribute("pret", new String[] { "Cheap",
				"Medium", "Expensive" });
		return dss;
	}