ry.The return type depends on the
 implementation .</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>query</code> - The query string. It can be a SQL for JdbcDataSource or a URL
              for HttpDataSource or a file location for FileDataSource or a custom
              format for your own custom DataSource.</dd>
<dt><span class="strong">Returns:</span></dt><dd>Depends on the implementation. For instance JdbcDataSource returns
         an Iterator&lt;Map &lt;String,Object&gt;&gt;</dd>