6 Replies Latest reply on Dec 11, 2008 6:00 AM by kus

Exception using HtmlPanelMenuItem: wrong number of arguments

kus Dec 10, 2008 4:45 AM

Hi all

I'm using Richfaces 3.2.2 SR1. I'm creating a MethodExpression and set it on the HtmlPanelMenuItem. If I click on the menu item, my action method is not called - I get an exception: javax.servlet.ServletException: wrong number of arguments.

Anyone has a solution how to call an action method passing an ActionEvent from the HtmlPanelMenuItem?

Thanks, Markus

Backing Bean:

public class WrongNumberBean {

 private HtmlPanelMenu menu;

 public HtmlPanelMenu getMenu() {
 if (menu == null) {
 menu = new HtmlPanelMenu();
 HtmlPanelMenuItem menuItem = new HtmlPanelMenuItem();
 menuItem.setId("some_id");
 menuItem.setLabel("test");
 MethodExpression me = FacesContext.getCurrentInstance().getApplication()
 .getExpressionFactory().createMethodExpression(
 FacesContext.getCurrentInstance().getELContext(),
 "#{wrongNumberBean.testAction}", null,
 new Class[] { ActionEvent.class });
 menuItem.setActionExpression(me);
 menu.getChildren().add(menuItem);
 }
 return menu;
 }

 public void setMenu(HtmlPanelMenu menu) {
 this.menu = menu;
 }

 public void testAction(ActionEvent actionEvent) {
 System.out.println("testAction called");
 }
}

XHTML

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
 "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
 xmlns:h="http://java.sun.com/jsf/html"
 xmlns:rich="http://richfaces.org/rich"
 xmlns:f="http://java.sun.com/jsf/core">
<head>
</head>
<body>
<!-- safari fix -->
<f:view contentType="text/html" />
<h:form>
 <rich:panelMenu binding="#{wrongNumberBean.menu}"/>
</h:form>
</body>
</html>

1. Re: Exception using HtmlPanelMenuItem: wrong number of argum

ilya_shaikovsky Dec 10, 2008 5:05 AM (in response to kus)

You defines action not actionListener in this way. So remove action event parameter.

Just JSF sources listing

 /**
 * <p>Set the {@link MethodExpression} pointing at the appication
 * action to be invoked, if this {@link UIComponent} is activated by
 * the user, during the <em>Apply Request Values</em> or <em>Invoke
 * Application</em> phase of the request processing lifecycle,
 * depending on the value of the <code>immediate</code>
 * property.</p>
 *
 * <p>Any method referenced by such an expression must be public, with
 * a return type of <code>String</code>, and accept no parameters.</p>
 *
 * @param action The new method expression
 */
 public void setActionExpression(MethodExpression action);

2. Re: Exception using HtmlPanelMenuItem: wrong number of argum

kus Dec 11, 2008 2:45 AM (in response to kus)

So it's not possible to pass any argument? I want to show a list of items, each with a different argument (id of the item).
Actions
3. Re: Exception using HtmlPanelMenuItem: wrong number of argum

ilya_shaikovsky Dec 11, 2008 5:01 AM (in response to kus)

use f:param
Actions
4. Re: Exception using HtmlPanelMenuItem: wrong number of argum

kus Dec 11, 2008 5:09 AM (in response to kus)

Thanks for your reply - good idea, but I have to build the menue on the java side. So I cannot use the f:param tag...
Actions
5. Re: Exception using HtmlPanelMenuItem: wrong number of argum

ilya_shaikovsky Dec 11, 2008 5:48 AM (in response to kus)
how about something like
HtmlCommandButton button = new HtmlCommandButton(); UIParameter parameter = new UIParameter(); button.getChildren().add(parameter);
Actions
6. Re: Exception using HtmlPanelMenuItem: wrong number of argum

kus Dec 11, 2008 6:00 AM (in response to kus)

Yes! It works - you saved my day! Thanks a lot!
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