selectManyCheckbox

[kgoedert]

Hi,

I´m trying to populate a selectManyCheckbox and I´m getting the following exception:

java.lang.IllegalArgumentException: Expected a child component type of UISelectItem/UISelectItems for component type javax.faces.SelectMany(j_id47). Found null.
 at com.sun.faces.renderkit.RenderKitUtils.getSelectItems(RenderKitUtils.java:357)
 at com.sun.faces.renderkit.html_basic.SelectManyCheckboxListRenderer.encodeEnd(SelectManyCheckboxListRenderer.java:103)
 at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:836)
 at javax.faces.component.UIComponent.encodeAll(UIComponent.java:896)
 at javax.faces.render.Renderer.encodeChildren(Renderer.java:137)
 at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:812)
 at org.ajax4jsf.renderkit.RendererBase.renderChild(RendererBase.java:282)
 at org.ajax4jsf.renderkit.RendererBase.renderChildren(RendererBase.java:262)
 at org.richfaces.renderkit.html.PanelRenderer.doEncodeChildren(PanelRenderer.java:199)
 at org.richfaces.renderkit.html.PanelRenderer.doEncodeChildren(PanelRenderer.java:194)
 at org.ajax4jsf.renderkit.RendererBase.encodeChildren(RendererBase.java:121)
 at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:812)
 at org.ajax4jsf.renderkit.RendererBase.renderChild(RendererBase.java:282)
 at org.ajax4jsf.renderkit.RendererBase.renderChildren(RendererBase.java:262)
 at org.richfaces.renderkit.TabRendererBase.encodeChildren(TabRendererBase.java:113)
 at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:812)
 at org.ajax4jsf.renderkit.RendererBase.renderChild(RendererBase.java:282)
 at org.ajax4jsf.renderkit.RendererBase.renderChildren(RendererBase.java:262)
 at org.richfaces.renderkit.html.TabPanelRenderer.doEncodeChildren(TabPanelRenderer.java:266)
 at org.richfaces.renderkit.html.TabPanelRenderer.doEncodeChildren(TabPanelRenderer.java:261)
 at org.ajax4jsf.renderkit.RendererBase.encodeChildren(RendererBase.java:121)
 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:577)
 at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:108)
 at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:216)
 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.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:44)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:141)
 at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:281)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
 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:230)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
 at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
 at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
 at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241)
 at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
 at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:580)
 at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
 at java.lang.Thread.run(Unknown Source)

In my page I have:

<h:selectManyCheckbox value="#{company.category}" required="true">
 <s:selectItems value="#{companyGeneralAction.categories}" var="cat" label="#{cat.name}"/>
 <s:convertEntity/>
 </h:selectManyCheckbox>

My "company" bean has an attribute like this:


 private Set<EntityCategory> category;



The EntityCategory is a entity bean like this:


@Name("entityCategory")
@Entity

public class EntityCategory implements Serializable {
 private static final long serialVersionUID = 1L;
 private Long id;
 private String name;
 private Set<Company> entity;



And in my session bean I have:


@Name("companyGeneralAction")
@Stateful
@Scope(ScopeType.SESSION)
public class CompanyAction implements ICompanyAction {
 @In(required = false)
 @DataModelSelection
 @Out(required = false)
 private Company company;
 @In(required = false)
 private RegistrationType registrationType;
 @Out(required = false)
 private List<EntityCategory> categories;
 @DataModel
 private List<Company> companyList = new ArrayList<Company>();
 @In
 private EntityManager entityManager;



What I want is to populate a select many checkbox with all the EntityCategory elements I have in the database. Where I´m going wrong here?

Thanks

[wise_guybg]

I believe company.category should be a list.

You will also have a problem in that JSF passes an Arrays$ArrayList to the setter. I would advise that you keep you company.category and remove the missing (from the new list) items and add the newly selected items. Otherwise you will have a Delete SQL for the old items and a couple of Insert SQLs for the new items which is not very optimized.

I believe I have asked if this can be done automatically somehow... No one answered!?

[wise_guybg]

Actually I wrote about selectManyListBox.

If company.category can be a set (I'm not sure about that) shouldn't you at least provide an empty set object?

[kgoedert]

Hello,

I just changed the attribute to List as suggested but the error is still the same. Any other ideas?

Thanks