Re: Iterator Problem : Please help

[Thomas Mahler]

Hi again Gaurav,

[EMAIL PROTECTED] wrote:
> 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.

Wow! I did not see any hints in this direction from the stacktrace. This must have been tricky to find.

OJB should work with JDK1.2 too. But you have to compile it from source with a jdk1.2 to activate the respective preprocessor switches.

Did you use the jakarta-ojb-xxx.jar from the binary distribution or did you build your own jdk12 jar from scratch?

The binary distribution jar is build with jdk 1.4 and is expected to cause problems under jdk1.2 (and even under some jdk1.3 implementations)

cheers,
Thomas

>
> -----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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>
>



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