Hi all; In my application i want to cast WrappedResultSet to OracleResultSet, but doesn't work; return (OracleResultSet) resultSetToCast; and when the following code before the cast : if (resultSetToCast instanceof org.jboss.resource.adapter.jdbc.WrappedResultSet ) { try { resultSetToCast = ((org.jboss.resource.adapter.jdbc.WrappedResultSet)resultSetToCast).getUnderlyingResultSet(); } catch (SQLException e) { e.printStackTrace(); } } and add jboss-common-jdbc-wrapper.jar into lib directory of my application, the following error was shown : java.lang.ClassCastException: $Proxy60 .... View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4040147#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...