RE: Iterator Problem : Please help

[Gaurav . Goyal]

After spending a few hours, I found that this was a problem with the version
of java that my web server was using. I upgraded from 1.2.2 to  1.3.1_06 and
it worked like a charm.

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Monday, December 23, 2002 4:41 PM
To: [EMAIL PROTECTED]
Subject: Iterator Problem : Please help


Please help with this:
I'm getting the following error when I call next() on Iterator. However
hasNext() returns true. if I do a getCount on broker, then it correctly
returns the number of records. Any idea what the problem here could be?
Thanks,
Gaurav

----------------------------------------EXCEPTION---------------------------
-----------------------------------------

[23/Dec/2002:16:19:53] failure (  526): Internal error: exception thrown
from the servlet service function (uri=/ojb/test.do):
java.util.NoSuchElementException, Stack: java.util.NoSuchElementException
        at org.apache.ojb.broker.accesslayer.RsIterator.next(Unknown Source)
        at
org.apache.ojb.broker.singlevm.PersistenceBrokerImpl.getCollectionByQuery(Un
known Source)
        at
org.apache.ojb.broker.singlevm.PersistenceBrokerImpl.getCollectionByQuery(Un
known Source)
        at
org.apache.ojb.broker.singlevm.PersistenceBrokerImpl.getCollectionByQuery(Un
known Source)
        at
org.apache.ojb.broker.singlevm.PersistenceBrokerImpl.getCollectionByQuery(Un
known Source)
        at
org.apache.ojb.broker.singlevm.DelegatingPersistenceBroker.getCollectionByQu
ery(Unknown Source)
        at
com.gecapital.erc.phoenix.test.TestServlet.getTableIterator(Unknown Source)
        at com.gecapital.erc.phoenix.test.TestServlet.doGet(Unknown Source)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at
com.iplanet.server.http.servlet.NSServletRunner.invokeServletService(NSServl
etRunner.java:897)
        at
com.iplanet.server.http.servlet.WebApplication.service(WebApplication.java:1
059)
        at
com.iplanet.server.http.servlet.NSServletRunner.ServiceWebApp(NSServletRunne
r.java:959)

-------------------------------------------CODE-----------------------------
-------------------------------------

    protected Iterator getTableIterator() throws IOException
    {
        Iterator result = null;
                Collection cresult = null;
        PersistenceBroker broker = null;
        try
        {
                broker = getBroker();
        }
        catch (Exception ex)
        {
                throw new IOException(ex.getMessage()); 
        }
        Criteria selectAll = null;
        Query query = QueryFactory.newQuery(MBudget.class, selectAll);
        cresult = broker.getCollectionByQuery(query);
                result = cresult.iterator();
        
//this.getServletContext().log(Integer.toString(broker.getCount(query)));
                broker.close();
        return result;   
    }

    protected void writeTable(Iterator iter, PrintWriter writer)
    {
        writer.println("<table border=\"1\">");
        writer.println("<tr><td><b>ID</b></td></tr>");
        while (iter.hasNext())
        {
                MBudget a = (MBudget) iter.next();
                writer.println("<tr><td>" + a.getbudget_id() + "</td>
</tr>");   
                        writer.println("<tr><td>aaa</td> </tr>");   
        }
        writer.println("</table>");
        
    }


The iter.next() fails with NoSuchElementException

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