code: public DataSource getDataSource(String dataSourceName) throws ServiceLocatorException {
  		DataSource dataSource = null;
  		try {
  			dataSource = (DataSource) ic.lookup(dataSourceName);
  		} catch (NamingException ne) {
  			throw new ServiceLocatorException(ne);
  		} catch (Exception e) {
  			throw new ServiceLocatorException(e);
  		}
  		return dataSource;
  	}
docs: This method obtains the datasource itself for a caller
  
  @return the DataSource corresponding to the name parameter