Hi,
I want to print a table using a JSP page. I am using a DAO from a session bean to access the table and send the ResultSet back to the bean.


This is the code of the DAO interface:
public interface DataEJBDAO
{
public void init();

public java.sql.ResultSet giveResults() ;

}


This is the code of my stateless Bean:
public abstract class DataEJBBean implements SessionBean {
protected SessionContext ctx;
/**
* @ejb.interface-method
* view-type="remote"
* @dao.call name="giveResults"
**/
public java.sql.ResultSet giveResults(){
System.out.println("Entering DataEJBBean.giveResults");
System.out.println("Exiting DataEJBBean.giveResults");
return null;
}
public void setSessionContext(javax.ejb.SessionContext ctx)
{
this.ctx=ctx;
}

public void unsetSessionContext()
{
this.ctx=null;
}

}

And this is the Implementation of the DAO Interface:

public class DataEJBDAOImpl implements DataEJBDAO{

private DataSource jdbcFactory;

public void init(){
System.out.println("Entering DataEJBDAOImpl.init()");
InitialContext c=null;

if(this.jdbcFactory==null){

try{
c=new InitialContext();
this.jdbcFactory=(DataSource)c.lookup("java:comp/env/jdbc/OracleDS");
}catch(Exception e){
System.out.println("Error in DataEJBDAOImpl.init()");
System.out.println(e);
}
}
System.out.println("Leaving DataEJBDAOImpl.init()");
}

public java.sql.ResultSet giveResults()
{
Connection con=null;
PreparedStatement ps=null;
ResultSet rs=null;

try{
con=jdbcFactory.getConnection();
String query="select employeeName from employeePersonelDetails";
ps=con.prepareStatement(query);

rs=ps.executeQuery();
}catch(SQLException e){
e.printStackTrace();
System.out.println("Inside DataEJBDAOImpl.giveResults()"+e);
}
finally{
try{
rs.close();
ps.close();
con.close();
}catch(Exception e){
}
System.out.println("Leaving DataEJBDAOImpl.giveResults()");
return(rs);
}
}
}

And this is the Client code:
/*
* Created on Feb 24, 2005
*
* To change the template for this generated file go to
* Window>Preferences>Java>Code Generation>Code and Comments
*/
package myDAO.client;

import java.rmi.RemoteException;
import java.util.Hashtable;
import java.sql.*;
import javax.ejb.CreateException;
import javax.naming.InitialContext;
import javax.naming.NamingException;

/**
* @author ram
*
* To change the template for this generated type comment go to
* Window>Preferences>Java>Code Generation>Code and Comments
*/
public class DAOClient {

private ResultSet result=null;
private myDAO.bean.DataEJBHome getHome() throws NamingException {
return (myDAO.bean.DataEJBHome) getContext().lookup(
myDAO.bean.DataEJBHome.JNDI_NAME);
}
private InitialContext getContext() throws NamingException {
Hashtable props = new Hashtable();

props.put(
InitialContext.INITIAL_CONTEXT_FACTORY,
"org.jnp.interfaces.NamingContextFactory");
props.put(InitialContext.PROVIDER_URL, "jnp://127.0.0.1:1099");

InitialContext initialContext = new InitialContext(props);
return initialContext;
}
public void testBean() {

try {
myDAO.bean.DataEJB myBean = getHome().create();

System.out.println("Getting results");
//--------------------------------------
//This is the place you make your calls.
result=myBean.giveResults();
try{
result.next();
String name=result.getString("employeeName");
System.out.println(name);
}catch(SQLException e){
System.out.println("Sql Exception in result");
}
} catch (RemoteException e) {
e.printStackTrace();
} catch (CreateException e) {
e.printStackTrace();
} catch (NamingException e) {
e.printStackTrace();
}
}

public static void main(String[] args) {
DAOClient test = new DAOClient();
test.testBean();

}
}

But I am getting this error:

Getting Result:
java.lang.reflect.UndeclaredThrowableException
at $Proxy1.giveResults(Unknown Source)
at myDAO.client.DAOClient.testBean(DAOClient.java:48)
at myDAO.client.DAOClient.main(DAOClient.java:67)
Caused by: java.io.NotSerializableException: oracle.jdbc.driver.OracleResultSetImpl
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1054)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:278)
at java.rmi.MarshalledObject.(MarshalledObject.java:92)
at org.jboss.invocation.jrmp.server.JRMPInvoker.invoke(JRMPInvoker.java:363)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:261)
at sun.rmi.transport.Transport$1.run(Transport.java:148)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:144)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
at java.lang.Thread.run(Thread.java:534)
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:247)
at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:223)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:133)
at org.jboss.invocation.jrmp.server.JRMPInvoker_Stub.invoke(Unknown Source)
at org.jboss.invocation.jrmp.interfaces.JRMPInvokerProxy.invoke(JRMPInvokerProxy.java:135)
at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:87)
at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:46)
at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:45)
at org.jboss.proxy.ejb.StatelessSessionInterceptor.invoke(StatelessSessionInterceptor.java:100)
at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:85)
... 3 more
Exception in thread "main"

I am using JBoss 3.2.1

Can anyone please help me.
Thanks,
IJ