pickList error: value of UIPickList component is not of type Array or List

[hbender]

Here my xhtml code:

<rich:panel>
        <h:form>
            <rich:pickList value="#{dmPermissionListOfRole}">

                  <f:selectItems value="#{dmPermissionListOfRoleInverse}"/>

            </rich:pickList>   
    </h:form>
</rich:panel>

and here the code of the backing bean (seam component):

    @DataModel(value="dmPermissionListOfRole")
    private List<Permission> permissionListOfRole;
   
    @Factory("dmPermissionListOfRole")
    public void initPermissionList() {...}
   
    @DataModel(value="dmPermissionListOfRoleInverse")
    private List<Permission> permissionListOfRoleInverse;
   
    @Factory("dmPermissionListOfRoleInverse")
    public void initPermissionListInverse() {...}

Running this code throws exception:

java.lang.IllegalArgumentException: Error: value of UIPickList component is not of type Array or List
    at org.richfaces.renderkit.PickListRenderer.getValuesList(PickListRenderer.java:146)

    ....

The same xhtml has a rich:dataTable with the same value ("dmPermissionListOfRole") which is rendered without problems.

If I omit the value of the pickList, the error is:

java.lang.IllegalArgumentException: Value  of tag <selectItems> attribute is incorrect.
    at org.ajax4jsf.util.SelectUtils.getSelectItems(SelectUtils.java:100)
    at org.richfaces.renderkit.PickListRenderer.encodeRows(PickListRenderer.java:243)
    at org.richfaces.renderkit.PickListRenderer.encodeSourceRows(PickListRenderer.java:359)

    ....

What is wrong? (Using RichFaces bundled with JBoss DevStudio 3.0, therefore I do not know which version of RichFaces is used. Where can I find which version is bundled with JBoss DevStudio?)

Heri

[ilya_shaikovsky]

1) selectItems tag should be pointed to list of selectItem objects. Or you should provide the converter for your Permission object.

2) the same for value attribute.

check please http://community.jboss.org/message/521331#521331 and related issue also for more info.

[hbender]

tks Ilya for clarification.

Meanwhile I found - by stepping through the code and try'n'error - nearly the same result.

The selectItems must indeed be provided by a List<SelectItem>. But if the value is also populated by such a list, the PickListRenderer.selectItemsForSelectedList() would not evalutate to equal:

  if (lookupItem.equals(selectItem.getValue())) {
                        selectItemForSelectedValues.add(selectItem);
                    }

(the lookupItem is taken from the values list, here an SelectItem, and compared against the selectItem.getValue(), which is my embedded class -> never equals).

Therefore the values have to be populated by the payload class, and a Converter has to be provided.

It would be nice if this method would behave correctly if the value list also contains SelecItem instances. Something like:

Object lookup =  ( lookupItem instanceof SelectItem ? lookupItem.getValue() : lookupItem );

if (lookup.equals(selectItem.getValue())) {
                         selectItemForSelectedValues.add(selectItem);
                     }

BTW: My original collections are of type set. Therefore I have to transform them to a list. Is there a inherent reason why the pickList does not support all types of Collection as value parameter?

And if there is a good reason: The reference (http://docs.jboss.org/richfaces/latest_3_3_X/en/devguide/html/rich_pickList.html) and the java doc (http://docs.jboss.org/richfaces/latest_3_3_X/en/tlddoc/index.html) should state this fact clearly.

Heri