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mwmann · Guest

Hi

I am having a problem using the JSF dataGrid component.

Basically I am using the dataGrid to display a list of tasks. The
problem is that the list contains different types of classes of tasks,
some containing more information (attributes) than others.

EG: a BasicTask contains title, id and owner, HOWEVER a MileStoneTask
which extends BasicTask contains a dueDate attribute.

The requirements for the JSF datagrid is to display the dueDate field
if the row/task is a MileStoneTask, else don't display.

This is my DataGrid source:

==============================

<h:dataTable value="#{taskListHandler.sortedTasksModel}"
var="task"
style="text-align: left; width: 100%;" border="0"
cellpadding="2" cellspacing="2"
rows="#{taskListHandler.noOfRows}"
first="#{taskListHandler.firstRowIndex}" >
<h:column>
<f:facet name="header">
<h:commandLink action="#{taskListHandler.sortById}"
immediate="true">
<h:outputText value="Id"/>
</h:commandLink>
</f:facet>
<h:outputText value="#{task.id}" styleClass="standardText"/>
</h:column>

<h:column>
<f:facet name="header">
<h:commandLink action="#{taskListHandler.sortByTitle}"
immediate="true">
<h:outputText value="Title"/>
</h:commandLink>
</f:facet>
<h:commandLink action="#{taskService.select}" immediate="true">
<f:param name="taskId" value="#{task.id}" />
<f:param name="taskType" value="#{task.type}" />
<h:outputText value="#{task.title}"
styleClass="standardText"/>
</h:commandLink>
</h:column>


<h:column>
<f:facet name="header">
<h:commandLink action="#{taskListHandler.sortByDue}"
immediate="true">
<h:outputText value="Due Date"/>
</h:commandLink>
</f:facet>
********* <h:outputText rendered="#{task instance of
com.face.domain.task.MileStoneTask}" value="#{task.dueDate.date}"
styleClass="standardText"/>
</h:column>

</h:dataTable>

==========================================

What I am trying to do is marked with **********

This is the error I am getting:

javax.servlet.ServletException: javax.servlet.jsp.JspException: task
instance of com.face.domain.task.MileStoneTask

Does anyone have any suggestion or pointers for me, as this is holding
up my development.

Thanks

hiwa · Guest

mwmann wrote: