[basex-talk] Question for XQJ to update

I made a simple XML called order.xml like this: -------------order.xml-------------- <orders> <order> <name>cola</name> <price>3.0</price> <factory>Number 1</factory> </order> <order> <name>coffee</name> <price>5.0</price> <factory>Number 2</factory> </order> </orders> --------------------------------------------

Now I want to update the price of the coffee to 6.0 with XQJ, so I got the following code:

String driverName = "org.basex.api.xqj.BXQDataSource"; Class<?> driverClass = Class.forName(driverName); XQDataSource dataSource = (XQDataSource)driverClass.newInstance(); XQConnection xqc = dataSource.getConnection();

String updateString = "declare variable $node := doc('etc/xml/orders.xml')//order[name='coffee']; "+ "replace value of node $node/price with '5.0', " + "return " + "put(doc('etc/xml/orders.xml'), 'orders.xml')"; XQExpression xqu = xqc.createExpression(); xqu.executeQuery(updateString); xqu.close();

unfortunately, it throws an exception. I tried many different ways and fails all the time. could any tell me the right "updateString"?

thanks a lot.