Yes, jira...
in the meantime, use the following as a workaround:
private HtmlDataTable jsfDataTable;
public HtmlDataTable getJsfDataTable() {
if(jsfDataTable==null)
jsfDataTable = new HtmlDataTable();
return jsfDataTable;
}
public void setJsfDataTable(HtmlDataTable jsfDataTable) {
this.jsfDataTable = jsfDataTable;
}
On 8/19/05, Kołoszko Paweł <[EMAIL PROTECTED]> wrote:
> I spent some time debugging and here are the results:
>
> Exception is thrown in getRows() method of
> org.apache.myfaces.component.html.ext.HtmlDataTable when command
>
> return ((_SerializableDataModel)_dataModel).getRows();
>
> is invoked. Cause of exception: _dataModel is null. This line is invoked
> only when _isDataModelRestored = true. I checked that when I open page2.jsp
> _dataModel is created and _isDataModelRestored is set to true. But when I
> return to page1.jsp from page2.jsp, setValueBinding method is invoked and
> _dataModel is set to null. But _isDataModelRestored is still true. JIRA?
>
> PK
>
> -----Original Message-----
> From: Kołoszko Paweł
> Sent: Friday, August 19, 2005 10:14 AM
> To: 'MyFaces Discussion'
> Subject: RE: FacesException: Could not get property rows of component...
>
> There is an example in "JavaServer in Action" where binding HtmlDataTable is
> shown and I can not find there 'new HtmlDataTable()' call or something like
> that.
>
> Let's summarize.
>
> I changed my backing bean code to
>
> private HtmlDataTable jsfDataTable;
> public HtmlDataTable getJsfDataTable() {
> --> jsfDataTable = new HtmlDataTable();
> return jsfDataTable;
> }
> public void setJsfDataTable(HtmlDataTable jsfDataTable) {
> this.jsfDataTable = jsfDataTable;
> }
>
> No NPE.
>
> Then I changed to
>
> --> private HtmlDataTable jsfDataTable = new HtmlDataTable();
> public HtmlDataTable getJsfDataTable() {
> return jsfDataTable;
> }
> public void setJsfDataTable(HtmlDataTable jsfDataTable) {
> this.jsfDataTable = jsfDataTable;
> }
>
> NPE still exist.
>
> I debuged my very first code (with no 'new HtmlDataTable()' call) and I can
> see that:
> When I open page1.jsp, setJsfDataTable is invoked and I receive nice
> HtmlDataTable object (so why should I call 'new HtmlDataTable()'?).
> When I open page2.jsp, setJsfDataTable is invoked again and I receive
> HtmlDataTable object.
> When I return to page1.jsp, getJsfDataTable is invoked and I can see that
> jsfDataTable looks quite nice, getJsfDataTable.getRows() returns a value,
> everything looks OK. And after that I receive exception.
>
> Maybe I do not know something. So could you explain me how to bind datatable
> object to backing bean properly?
>
> PK
>
> -----Original Message-----
> From: Martin Marinschek [mailto:[EMAIL PROTECTED]
> Sent: Thursday, August 18, 2005 4:22 PM
> To: MyFaces Discussion
> Subject: Re: FacesException: Could not get property rows of component...
>
> next question: do you ever call 'new HtmlDataTable()'?
>
> it is your responsibility to initialize the components you use for value
> binding!
>
> regards,
>
> Martin
>
> On 8/18/05, Kołoszko Paweł <[EMAIL PROTECTED]> wrote:
> > No, with new HtmlDataTable() I do not get NPE. So what does it mean?
> >
> > Ps. My backing bean is session scoped.
> >
> > PK
> >
> > -----Original Message-----
> > From: Martin Marinschek [mailto:[EMAIL PROTECTED]
> > Sent: Thursday, August 18, 2005 3:34 PM
> > To: MyFaces Discussion
> > Subject: Re: FacesException: Could not get property rows of component...
> >
> > What happens if in your getJsfDataTable function you call new
> > HtmlDataTable() each time?
> >
> > do you still get this NPE?
> >
> > regards,
> >
> > Martin
> >
> > On 8/18/05, Kołoszko Paweł <[EMAIL PROTECTED]> wrote:
> > > One more thing. When binding="#{listRodzajePism.jsfDataTable}" is
> > > removed from x:datatable tag, everyhing works just fine.
> > >
> > > PK
> > >
> > > -----Original Message-----
> > > From: Kołoszko Paweł
> > > Sent: Thursday, August 18, 2005 11:20 AM
> > > To: [email protected]
> > > Subject: FacesException: Could not get property rows of component...
> > >
> > > MyFaces 1.0.9
> > >
> > > I have a following problem:
> > >
> > > I have page.jsp with datatable and a button:
> > >
> > > <x:dataTable id="listarodzajepism"
> value="#{listRodzajePism.rodzajePism}"
> > > var="rodzajPisma" border="0"
> > > styleClass="standardTable"
> > > headerClass="standardTable_SortHeader"
> > > rowClasses="standardTable_Row1,standardTable_Row2"
> > > footerClass="standardTable_Footer"
> > > sortColumn="#{listRodzajePism.sort}"
> > > sortAscending="#{listRodzajePism.ascending}"
> > > preserveDataModel="true"
> > > preserveSort="true"
> > > rows="24"
> > > binding="#{listRodzajePism.jsfDataTable}">
> > >
> > > ... column, column, column ...
> > > </x:dataTable>
> > > <h:commandButton id="cb" value="NewPage" action="newpage"/>
> > >
> > > Action "newpage" of commandbutton opens page2.jsp with only one button:
> > >
> > > <h:commandButton id="button"
> > > value="Cancel"
> > > action="back"
> > > immediate="true"/>
> > >
> > > Action "back" goes back to page.jsp. And here the problem occurs
> > > becuase I receive an error:
> > >
> > > javax.faces.FacesException: Could not get property rows of component
> > > rodzajepismview:listarodzajepism Caused by:
> java.lang.NullPointerException
> > > at
> > > org.apache.myfaces.component.html.ext.HtmlDataTable.getRows(HtmlData
> > > Ta
> > > ble.ja
> > > va:547)
> > >
> > > When I open page.jsp everything is OK, but action page.jsp ->
> > > page2.jsp -> page.jsp Cause an error.
> > >
> > > In my backing bean I have:
> > >
> > > private HtmlDataTable jsfDataTable;
> > >
> > > public HtmlDataTable getJsfDataTable() {
> > > return jsfDataTable;
> > > }
> > >
> > > public void setJsfDataTable(HtmlDataTable jsfDataTable) {
> > > this.jsfDataTable = jsfDataTable;
> > > }
> > >
> > > What can cause this problem? Is it a bug in MyFaces or my fault
> > > somewher in my code?
> > >
> > > PK
> > >
> >
> >
> > --
> >
> > http://www.irian.at
> > Your JSF powerhouse -
> > JSF Trainings in English and German
> >
>
>
> --
>
> http://www.irian.at
> Your JSF powerhouse -
> JSF Trainings in English and German
>
--
http://www.irian.at
Your JSF powerhouse -
JSF Trainings in English and German
