Error: Dynamic Menu + Richfaces + A4j

[Benigno Sales]

Hi,

I´m having problems when i try to create a dynamic menu, getting the params from the data base.

Menu.xhtml

<a4j:outputPanel ajaxRendered="true" id="mainOutPutPanel">
      <a4j:form>
            <rich:toolBar binding="#{indexBackingBean.menu}" itemSeparator="true">
                <rich:menuItem action="#{indexBackingBean.setIndex}" value="Home"/>
            </rich:toolBar>        
            <a4j:include id="principal" viewId="#{indexBackingBean.viewId}" />            
       </a4j:form>
</a4j:outputPanel>

IndexBackingBean.java

public class IndexBackingBean {

    private String viewId = "principal.xhtml";
    private HtmlToolBar menu = new HtmlToolBar();

    public IndexBackingBean() throws SQLException {
        
    }

    public HtmlToolBar getMenu() {
        return menu;
    }

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

    public String getViewId() {
        return viewId;
    }

    public void setViewId(String paginaAtual) {
        this.viewId = paginaAtual;
    }

    public void setIndex() {
        this.viewId = "principal.xhtml";
    }

    public void setCrudUsuario() {
        this.viewId = "crudUsuario.xhtml";
        System.out.println("[  Changing page to crudUsuario.xhtml  ]");
    }
public void carregaMenu() throws SQLException {
        List<Menu> menus = new ArrayList<Menu>();
        List<HtmlDropDownMenu> htmlDropDownMenus = new ArrayList<HtmlDropDownMenu>();
        Usuario u = (Usuario) Utilitario.getHttpSessionObject("usuario");
        PermissaoDAO permissaoDAO = new PermissaoDAO();
        List<Permissao> permissoes = permissaoDAO.buscaPermissoesPorPerfil(u.getPerfil());
        System.out.println("[ Starting load menu  ]");
        for (Permissao permissao : permissoes) {
            Menu m = permissao.getMenu();
            if (!menus.contains(m)) {
                menus.add(m);
            }
        }
        for (Menu m : menus) {
            List<HtmlMenuItem> htmlMenuItems = new ArrayList<HtmlMenuItem>();
            FacesContext facesContext = FacesContext.getCurrentInstance();
            for (ItemMenu itemMenu : m.getItensMenu()) {
                HtmlMenuItem htmlMenuItem = new HtmlMenuItem();
                ELContext el = facesContext.getELContext();
                Application app = facesContext.getApplication();
                ExpressionFactory ef = app.getExpressionFactory();
                MethodExpression methodExpression = ef.createMethodExpression(el, itemMenu.getViewId(), String.class, new Class[]{});
                htmlMenuItem.setActionExpression(methodExpression);
                htmlMenuItem.setValue(itemMenu);
                htmlMenuItem.setSubmitMode("ajax");
                htmlMenuItems.add(htmlMenuItem);
            }
            HtmlDropDownMenu htmlDropDownMenu = new HtmlDropDownMenu();
            htmlDropDownMenu.setValue(m);
            htmlDropDownMenu.getChildren().addAll(htmlMenuItems);
            htmlDropDownMenus.add(htmlDropDownMenu);
        }
        menu.getChildren().addAll(htmlDropDownMenus);
        System.out.println("[  Menu loaded.  ]");
    }

The menu is loades, but when i click on a link of the menu, returns the follow error:

type Exception report

message 

description The server encountered an internal error () that prevented it from fulfilling this request.

exception 

javax.servlet.ServletException: Argument Error: Parameter text is null
	javax.faces.webapp.FacesServlet.service(FacesServlet.java:256)
	org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:206)
	org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
	org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:388)
	org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:515)
	org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)


root cause 

SEVERE: Servlet.service() for servlet Faces Servlet threw exception
java.lang.NullPointerException: Argument Error: Parameter text is null
        at com.sun.faces.renderkit.html_basic.HtmlResponseWriter.writeText(HtmlResponseWriter.java:694)
        at org.richfaces.renderkit.html.DropDownMenuRenderer.doEncodeBegin(DropDownMenuRenderer.java:191)
        at org.richfaces.renderkit.html.DropDownMenuRenderer.doEncodeBegin(DropDownMenuRenderer.java:128)
        at org.ajax4jsf.renderkit.RendererBase.encodeBegin(RendererBase.java:100)
        at javax.faces.component.UIComponentBase.encodeBegin(UIComponentBase.java:788)
        at org.ajax4jsf.renderkit.RendererBase.renderChild(RendererBase.java:275)
        at org.richfaces.renderkit.html.ToolBarRendererBase.encodeChildren(ToolBarRendererBase.java:103)
        at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:812)
        at org.ajax4jsf.renderkit.RendererBase.renderChild(RendererBase.java:277)
        at org.ajax4jsf.renderkit.RendererBase.renderChildren(RendererBase.java:258)
        at org.ajax4jsf.renderkit.RendererBase.renderChild(RendererBase.java:279)
        at org.ajax4jsf.renderkit.RendererBase.renderChildren(RendererBase.java:258)
        at org.richfaces.renderkit.html.PanelRenderer.doEncodeChildren(PanelRenderer.java:200)
        at org.richfaces.renderkit.html.PanelRenderer.doEncodeChildren(PanelRenderer.java:195)
        at org.ajax4jsf.renderkit.RendererBase.encodeChildren(RendererBase.java:120)
        at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:812)
        at org.ajax4jsf.renderkit.RendererBase.renderChild(RendererBase.java:277)
        at org.ajax4jsf.renderkit.RendererBase.renderChildren(RendererBase.java:258)
        at org.ajax4jsf.renderkit.RendererBase.renderChild(RendererBase.java:279)
        at org.ajax4jsf.renderkit.RendererBase.renderChildren(RendererBase.java:258)
        at org.ajax4jsf.renderkit.html.AjaxOutputPanelRenderer.encodeChildren(AjaxOutputPanelRenderer.java:78)
        at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:812)
        at javax.faces.component.UIComponent.encodeAll(UIComponent.java:886)
        at javax.faces.component.UIComponent.encodeAll(UIComponent.java:892)
        at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:592)
        at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:100)
        at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:176)
        at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:106)
        at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
        at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:144)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:245)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:206)
        at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
        at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:388)
        at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:515)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
        at java.lang.Thread.run(Thread.java:619)

21/06/2010 12:29:41 com.sun.faces.lifecycle.LifecycleImpl phase
WARNING: executePhase(RENDER_RESPONSE 6,com.sun.faces.context.FacesContextImpl@1372bdb) threw exception
javax.faces.FacesException: java.lang.NullPointerException: Argument Error: Parameter text is null
        at javax.faces.component.UIComponent.invokeOnComponent(UIComponent.java:675)
        at javax.faces.component.UIComponentBase.invokeOnComponent(UIComponentBase.java:650)
        at javax.faces.component.UIComponent.invokeOnComponent(UIComponent.java:681)
        at javax.faces.component.UIComponentBase.invokeOnComponent(UIComponentBase.java:650)
        at javax.faces.component.UIComponent.invokeOnComponent(UIComponent.java:681)
        at javax.faces.component.UIComponentBase.invokeOnComponent(UIComponentBase.java:650)
        at org.ajax4jsf.component.AjaxViewRoot.encodeChildren(AjaxViewRoot.java:551)
        at javax.faces.component.UIComponent.encodeAll(UIComponent.java:886)
        at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:592)
        at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:100)
        at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:176)
        at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:106)
        at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
        at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:144)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:245)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:206)
        at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
        at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:388)
        at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:515)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
        at java.lang.Thread.run(Thread.java:619)

Please HELP MEU, and sorry for the bad english!

[Benigno Sales]

Hello ??? Someone help me!