I replied on java ranch. Basically, you're returning a List but should
be returning a String.
Check out the java ranch post for details.
Caroline Jen wrote:
I ran into a runtime ClassCastException to retrieve
data from a <h:dataTable ... > after clicking on the
button of that web page.
Here is that web page xxx.jsp:
<h:dataTable value="#{arrival.personnel}" var="pInfo">
......
......
<h:commandButton id="Depart" value="DEPART"
action="#{departure.updateDeparturePersonnel}"/>
The "personnel" is the List that builds the xxx.jsp
and it is also the List I try to access after the
button in the xxx.jsp is clicked. Here in my
configuration file:
<managed-bean>
<managed-bean-name>arrival</managed-bean-name>
<managed-bean-class>processAction.DepartureManagementBean</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
</managed-bean>
<managed-bean>
<managed-bean-name>departure</managed-bean-name>
<managed-bean-class>processAction.DepartureManagementBean</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
</managed-bean>
when the updateDeparturePersonnel() method is called
in the DepartureManagementBean.java, I got run-time
ClassCastException. And I am unable to see the
problems in my code.
quote:
java.lang.ClassCastException
com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:72)
javax.faces.component.UICommand.broadcast(UICommand.java:312)
javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:267)
javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:381)
com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:75)
com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:200)
com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:90)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:197)
This is my DepartureManagementBean.java:
package processAction;
import java.util.ArrayList;
import java.util.List;
import processDelegate.ListPersonnel;
import processDelegate.PersonnelBean;
public class DepartureManagementBean
{
private List personnel = new ArrayList();
private List departurePersonnel = new ArrayList();
// The constructor part and the creation of the
"personnel" List has been successfully tested
public DepartureManagementBean()
{
// instantiate the business delegate
ListPersonnel listPersonnel = new ListPersonnel();
personnel = listPersonnel.getPersonnelInfo();
}
public List getPersonnel()
{
return personnel;
}
public void setPersonnel( List personnel )
{
this.personnel = personnel;
}
public List updateDeparturePersonnel( )
{
// Iterate through the data rows ...
for ( int index = 0; index < personnel.size();
index++ )
{
PersonnelBean personnelBean = new
PersonnelBean();
personnelBean = ( PersonnelBean
)personnel.get(index);
// If this row is selected, add all data
fields the corresponding message
if ( personnelBean.isSelectedPersonnel()
)
{
departurePersonnel.add( personnelBean
);
}
}
return departurePersonnel;
}
public List getDeparturePersonnel()
{
return departurePersonnel;
}
public void setDeparturePersonnel( List
departurePersonnel )
{
this.departurePersonnel = departurePersonnel;
}
}// End DepartureManagementBean.java
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