How to Generate Rich PickList Control Dynamically

[kapil29]

Hi

I am traying to generate the rich pick list control dynamically using Custom Java Classes i.e. HtmlPickList class when clicking on CommadButton, I am having the problem with how can I add the Items in the PickList, I need to display the predefined set  of questions from the database on left hand side of pick list and  selection may appear on right hand side of picklist..

My code is is

     UIDiv demoBlockPanel = new UIDiv();
            HtmlTab tab = new HtmlTab();
            tab.setId("DemoQuestion");
            tab.setLabel("Demo Questions");

            HtmlPickList pickList = new HtmlPickList();
               pickList.setValueExpression("value",application.getExpressionFactory().createValueExpression(context.getELContext(),

               demoBlockPanel.getChildren().add(pickList);

Kindly help me to sort out this problem..

[ilya_shaikovsky]

create UISelectItems and fill the value with the SelectItem objects.

[kapil29]

Thanks for help, It's work for me now, But How do I set the dynamic values for HtmlPickList control, I am using below approach to set the list of selected values in demoQuestion list object, also my converter code not working when I setting the converter object as mentioned in below sample code..

java.lang.NumberFormatException - For input string: "null"

      UIDiv demoQuestionsDiv = new UIDiv();
                    demoQuestionsDiv.getAttributes().put("style","clear:both;margin-top:5px;float:left;padding:3px");
                    HtmlPickList pickList = new HtmlPickList();

                    pickList.setValueExpression("value",application.getExpressionFactory().createValueExpression(context.getELContext(), "#         {projectBean.questions[" + i + "].demoQuestions}" , String.class));
                    pickList.setStyleClass("DemoQuestionList");

                    DemoBlockConverter converter = new DemoBlockConverter();
                    pickList.setConverter(converter);

                    List<DemoQuestion> demoQuestionList = demoQuestionService.getEnabledDemoQuestions();
                    List<UISelectItem> demoQuestionSelectItemList = new ArrayList<UISelectItem>();
                    for (DemoQuestion demoQuestion : demoQuestionList) {
                        UISelectItem items  = new UISelectItem();
                      
                        items.setId("DemoQuestion"+demoQuestion.getId());
                        items.setItemValue(demoQuestion.getId());
                        items.setItemLabel(demoQuestion.getText());

                        demoQuestionSelectItemList.add(items);

                      pickList.getChildren().add(items);
                   }

              demoQuestionsDiv.getChildren().add(pickList);

@Service(value = "demoBlockConverter")
public class DemoBlockConverter implements Converter{

    @Autowired
    private DemoQuestionService demoQuestionService;

    public Object getAsObject(FacesContext context, UIComponent component, String value)
            throws ConverterException {
        System.out.println("INside Converter====="+value);
        if (context == null || component == null) throw new NullPointerException();
        if (value == null || value.length() == 0) return null;

        DemoQuestion demoQuestion = demoQuestionService.getDemoQuestion(new Long(value));

        return demoQuestion;
    } // end method getAsObject

    /*public List<DemoQuestion> getAsObject(FacesContext context, UIComponent component, Stri){

    } */

    public String getAsString(FacesContext context, UIComponent component, Object value)
            throws ConverterException {
        if (context == null || component == null) throw new NullPointerException();
        if (value == null || value.getClass() != DemoQuestion.class) return null;

        DemoQuestion demoQuestion = (DemoQuestion) value;
        return demoQuestion.getId().toString();
    } // end method getAsString
}

Kindly let me know where I made the mistake...

[ilya_shaikovsky]

java.lang.NumberFormatException - For input string: "null"

where this appears?

[kapil29]

Hi.

This exception will be comming when i am selecting the values (Question) from the left hand side of pickList and hitting the Submit button. I realize that the value coming to the converter method i.e. getAsObject() is null, So my backing bean property is causing problem.

[kapil29]

also please find the below server  exception log

javax.faces.FacesException: javax.faces.FacesException: Exception while validating component with path : {Component-Path : [Class: org.ajax4jsf.component.AjaxViewRoot,ViewId: /app/project/new.xhtml][Class: javax.faces.component.html.HtmlForm,Id: newProjectForm][Class: com.sun.facelets.tag.ui.ComponentRef,Id: j_id57][Class: com.sun.facelets.tag.ui.ComponentRef,Id: j_id119][Class: org.ajax4jsf.component.html.HtmlAjaxRegion,Id: j_id147][Class: org.richfaces.component.html.HtmlTabPanel,Id: questionnaire_tab_panel][Class: org.richfaces.component.html.HtmlTab,Id: Q2][Class: com.dimestore.vi.web.component.UIDiv,Id: Q2Panel][Class: com.dimestore.vi.web.component.UIDiv,Id: j_id435][Class: com.dimestore.vi.web.component.UIDiv,Id: j_id442][Class: org.richfaces.component.html.HtmlPickList,Id: j_id405]}
     at javax.faces.component.UIComponent.invokeOnComponent(UIComponent.java:166)
     at javax.faces.component.UIComponentBase.invokeOnComponent(UIComponentBase.java:293)
     at javax.faces.component.UIComponent.invokeOnComponent(UIComponent.java:172)
     at javax.faces.component.UIComponentBase.invokeOnComponent(UIComponentBase.java:293)
     at javax.faces.component.UIComponent.invokeOnComponent(UIComponent.java:172)
     at javax.faces.component.UIComponentBase.invokeOnComponent(UIComponentBase.java:293)
     at javax.faces.component.UIComponent.invokeOnComponent(UIComponent.java:172)
     at javax.faces.component.UIComponentBase.invokeOnComponent(UIComponentBase.java:293)
     at javax.faces.component.UIComponent.invokeOnComponent(UIComponent.java:172)
     at javax.faces.component.UIComponentBase.invokeOnComponent(UIComponentBase.java:293)
     at org.ajax4jsf.component.AjaxViewRoot.processPhase(AjaxViewRoot.java:224)
     at org.ajax4jsf.component.AjaxViewRoot.processValidators(AjaxViewRoot.java:455)
     at org.apache.myfaces.lifecycle.ProcessValidationsExecutor.execute(ProcessValidationsExecutor.java:32)
     at org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:103)
     at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:76)
     at javax.faces.webapp.FacesServlet.service(FacesServlet.java:151)
     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:178)
     at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
     at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:390)
     at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:517)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:378)
     at org.springframework.security.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:109)
     at org.springframework.security.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:83)
     at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390)
     at org.springframework.security.ui.SessionFixationProtectionFilter.doFilterHttp(SessionFixationProtectionFilter.java:67)
     at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)
     at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390)
     at org.springframework.security.ui.ExceptionTranslationFilter.doFilterHttp(ExceptionTranslationFilter.java:101)
     at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)
     at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390)
     at org.springframework.security.providers.anonymous.AnonymousProcessingFilter.doFilterHttp(AnonymousProcessingFilter.java:105)
     at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)
     at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390)
     at org.springframework.security.wrapper.SecurityContextHolderAwareRequestFilter.doFilterHttp(SecurityContextHolderAwareRequestFilter.java:91)
     at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)
     at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390)
     at org.springframework.security.ui.AbstractProcessingFilter.doFilterHttp(AbstractProcessingFilter.java:277)
     at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)
     at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390)
     at org.springframework.security.ui.logout.LogoutFilter.doFilterHttp(LogoutFilter.java:89)
     at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)
     at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390)
     at org.springframework.security.context.HttpSessionContextIntegrationFilter.doFilterHttp(HttpSessionContextIntegrationFilter.java:235)
     at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)
     at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390)
     at org.springframework.security.concurrent.ConcurrentSessionFilter.doFilterHttp(ConcurrentSessionFilter.java:99)
     at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)
     at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390)
     at org.springframework.security.util.FilterChainProxy.doFilter(FilterChainProxy.java:175)
     at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:236)
     at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:167)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at com.dimestore.vi.web.filter.SessionTimeoutFilter.doFilter(SessionTimeoutFilter.java:41)
     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:127)
     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:298)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
     at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
     at java.lang.Thread.run(Thread.java:619)
Caused by: javax.faces.FacesException: Exception while validating component with path : {Component-Path : [Class: org.ajax4jsf.component.AjaxViewRoot,ViewId: /app/project/new.xhtml][Class: javax.faces.component.html.HtmlForm,Id: newProjectForm][Class: com.sun.facelets.tag.ui.ComponentRef,Id: j_id57][Class: com.sun.facelets.tag.ui.ComponentRef,Id: j_id119][Class: org.ajax4jsf.component.html.HtmlAjaxRegion,Id: j_id147][Class: org.richfaces.component.html.HtmlTabPanel,Id: questionnaire_tab_panel][Class: org.richfaces.component.html.HtmlTab,Id: Q2][Class: com.dimestore.vi.web.component.UIDiv,Id: Q2Panel][Class: com.dimestore.vi.web.component.UIDiv,Id: j_id435][Class: com.dimestore.vi.web.component.UIDiv,Id: j_id442][Class: org.richfaces.component.html.HtmlPickList,Id: j_id405]}
     at javax.faces.component.UIInput.validate(UIInput.java:420)
     at javax.faces.component.UISelectMany.validate(UISelectMany.java:401)
     at javax.faces.component.UIInput.processValidators(UIInput.java:185)
     at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:726)
     at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:726)
     at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:726)
     at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:726)
     at org.richfaces.component.UISwitchablePanel.processValidators(UISwitchablePanel.java:236)
     at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:726)
     at org.ajax4jsf.component.UIAjaxRegion.processValidators(UIAjaxRegion.java:125)
     at org.ajax4jsf.component.AjaxViewRoot$3.invokeContextCallback(AjaxViewRoot.java:439)
     at org.ajax4jsf.component.ContextCallbackWrapper.invokeContextCallback(ContextCallbackWrapper.java:44)
     at javax.faces.component.UIComponent.invokeOnComponent(UIComponent.java:163)
     ... 69 more
Caused by: java.lang.NumberFormatException: For input string: "null"
     at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
     at java.lang.Long.parseLong(Long.java:403)
     at java.lang.Long.<init>(Long.java:671)
     at com.dimestore.vi.web.convert.DemoBlockConverter.getAsObject(DemoBlockConverter.java:34)
     at org.ajax4jsf.util.SelectUtils.getConvertedUISelectManyValue(SelectUtils.java:199)
     at org.richfaces.renderkit.PickListRenderer.getConvertedValue(PickListRenderer.java:141)
     at javax.faces.component.UISelectMany.getConvertedValue(UISelectMany.java:411)
     at javax.faces.component.UIInput.validate(UIInput.java:399)
     ... 81 more

[ilya_shaikovsky]

So seems happens there new Long(value) as value can't be parsed as long.

[kapil29]

So thats why I was asking , I don;t know how to set the dynamic values for HtmlPickList items,,, So could please let me know How do I set the values for selected item in HtmlPickList.. Was my approach wrong for setting the bean value using setValueExpression () method...

Kindly help me..

Thanks

Kapil

[kapil29]

Hi,

  any update on below issues,

will appreciate for your reply....

Thanks

[kapil29]

Hi Thanks, Now its working properly,

Now I need to display the Panel right side of the dynamic picklist which shows the selected questions and there answers...

So how could I display the Panel Dynamically when selected it from the Pick List,

I want it to be display in the following style

My structure of database is as follows which display the list of "Question" in left side of Dynamic PickList and selection will appear in right side of list.

Question(id, text)

Answer(id, text, questio_id)

Question (1, "What is your Sex?)

Answer (1, "Select One", 1)

Answer (2, "Male" ,1)

Answer (3, "Female",1)

Question (2, "What is your Age?)

Answer (4, "Select One", 2)

Answer (5, "10-20" ,2)

Answer (6, "20-30",2)

Please find the attached screen shot for your reference.