h:selectManyCheckbox and enums

[stu2]

I'm trying to populate a group of checkboxes from enum values. I've gotten it working so that it displays properly (all checkboxes properly appear) but I get a converter exception when I submit the form. I wasn't able to find any examples of selectMany anything in the example apps, so forgive me if this is a basic question!

Anyway, here's the exception I'm seeing:

[ExceptionFilter] exception root cause
java.lang.NullPointerException
 at org.apache.myfaces.shared_impl.renderkit._SharedRendererUtils.getConvertedUISelectManyValue(_SharedRendererUtils.java:147)
 at org.apache.myfaces.shared_impl.renderkit.RendererUtils.getConvertedUISelectManyValue(RendererUtils.java:673)
 at org.apache.myfaces.shared_impl.renderkit.html.HtmlCheckboxRendererBase.getConvertedValue(HtmlCheckboxRendererBase.java:299)
 at javax.faces.component.UISelectMany.getConvertedValue(UISelectMany.java:326)
 at javax.faces.component.UIInput.validate(UIInput.java:349)
 at javax.faces.component.UISelectMany.validate(UISelectMany.java:315)
 at javax.faces.component.UIInput.processValidators(UIInput.java:183)
 at javax.faces.component.UIForm.processValidators(UIForm.java:70)
 at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:624)
 at javax.faces.component.UIViewRoot.processValidators(UIViewRoot.java:146)
 at org.ajax4jsf.framework.ajax.AjaxViewRoot.access$201(AjaxViewRoot.java:53)

My SFSB looks like this (only relevant bits included):

 private ValidationCategory [] validationCategories;

 public ValidationCategory [] getValidationCategories() {
 return validationCategories;
 }

 public ValidationCategory [] getAllValidationCategories() {
 return ValidationCategory.values();
 }

 public void setValidationCategories(ValidationCategory [] validationCategories) {
 System.out.println("Setting val categories. Size is " + validationCategories.length);
 this.validationCategories = validationCategories;
 }

And the facelets section for the form is this:

 <h:form id="productTypeForm">
 <h:selectManyCheckbox id="productTypes" value="#{feedMapping.validationCategories}">
 <s:selectItems value="#{feedMapping.allValidationCategories}"
 var="item" label="${item.name}" />
 </h:selectManyCheckbox>
 <div>
 <h:commandButton value="Continue"
 action="#{feedMapping.selectProductTypes}">
 <s:conversationId />
 </h:commandButton>
 </div>
 </h:form>

I've tried several permuations of how to represent the selected values: as a List and in this case as an [] since I found a JSF forum post saying this was how it worked.

s:selectItems is supposed to automatically register a converter for Enums, and it seems to be working for rendering the group. But can anyone suggest how I could capture the selected results?

Thanks!

[stu2]

I now have a string [] receiving the checkbox values, so the previous post's bean looks like this:

 private String [] validationCategories;

And the page renders properly, showing all of the checkboxes. If I don't check any and click "Continue", the button's listener gets called, the value method gets called (setting 0 selections of course)

<h:selectManyCheckbox id="productTypolios" value="#{feedMapping.validationCategories}">

And all looks well. The moment I check any boxes though, it's as if the apply model values phase is never hit - nothing in the bean is called at all though. And I struggling with how to debug this.

So, what I'd prefer is to get suggestions on how I can figure it out myself. I'm a JSF newbie, and though I'm reading everything I can get my hands on, some of this stuff is a little bumpy at first.

Thanks!

[pmuir]

s:selectItems doesn't register any converters. You need to put a <s:convertEnum /> on it

Try adding an h:messages to your page and see where the error is ocuring.

[pmuir]

yeah. s:selectItems should work fine for a selectMany.

http://jira.jboss.com/jira/browse/JBSEAM-1014