* If no dataSource name is given, values for jdbcDriver etc are needed. If these
* values are present, they are taken. Otherwise, they are looked up in the resources
* with the keys "jdbc.driver", "jdbc.url", "jdbc.user" and "jdbc.password".
*/
public void allowOverride(RequestContext context) {
Resources res = context.getResources();
// get default values
setRole(getDefault(res, "mondrian.role", getRole()));
setDynResolver(getDefault(res, "mondrian.dynResolver", getDynResolver()));
setDynLocale(getDefault(res, "mondrian.dynLocale", getDynLocale()));