You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@myfaces.apache.org by "Paweł Kołoszko (JIRA)" <my...@incubator.apache.org> on 2005/08/19 14:55:55 UTC
[jira] Created: (MYFACES-431) NullPointerException when binding HtmlDataTable to backing bean
NullPointerException when binding HtmlDataTable to backing bean
---------------------------------------------------------------
Key: MYFACES-431
URL: http://issues.apache.org/jira/browse/MYFACES-431
Project: MyFaces
Type: Bug
Components: Tomahawk
Versions: 1.0.9 beta
Environment: Windows XP, Jboss 3.2.6, Internet Explorer
Reporter: Paweł Kołoszko
Priority: Critical
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(HtmlDataTable.java: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;
}
Backing bean is session scoped. When binding="#{listRodzajePism.jsfDataTable}" is removed from x:datatable tag, everyhing works just fine.
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.
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
http://issues.apache.org/jira/secure/Administrators.jspa
-
For more information on JIRA, see:
http://www.atlassian.com/software/jira
[jira] Closed: (MYFACES-431) NullPointerException when binding HtmlDataTable to backing bean
Posted by "Mathias Broekelmann (JIRA)" <my...@incubator.apache.org>.
[ http://issues.apache.org/jira/browse/MYFACES-431?page=all ]
Mathias Broekelmann closed MYFACES-431:
---------------------------------------
Fix Version: Nightly Build
Resolution: Invalid
I close this issue since it is related to an old implementation of UIData (1.0.9).
We can reopen this issue if the problem still exists with the current nightly.
> NullPointerException when binding HtmlDataTable to backing bean
> ---------------------------------------------------------------
>
> Key: MYFACES-431
> URL: http://issues.apache.org/jira/browse/MYFACES-431
> Project: MyFaces
> Type: Bug
> Components: Tomahawk
> Versions: 1.0.9 beta
> Environment: Windows XP, Jboss 3.2.6, Internet Explorer
> Reporter: Pawe? Ko?oszko
> Assignee: Mathias Broekelmann
> Priority: Critical
> Fix For: Nightly Build
>
> 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(HtmlDataTable.java: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;
> }
> Backing bean is session scoped. When binding="#{listRodzajePism.jsfDataTable}" is removed from x:datatable tag, everyhing works just fine.
> 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.
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
http://issues.apache.org/jira/secure/Administrators.jspa
-
For more information on JIRA, see:
http://www.atlassian.com/software/jira