Hi! I found the problem's cause: SelectItem instances used in different selectOneMenus should should not refer to the same value or label instances, which might be the case if you use static variables.
Regards, Matthias > -----Ursprüngliche Nachricht----- > Von: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Auftrag > von Matthias Kahlau > Gesendet: Donnerstag, 19. Januar 2006 00:48 > An: Users MyFaces > Betreff: Problem with selectOneMany Value-Binding > > > Hi! > > > To create a List for the selectItems value, I do the following: > > 1) I create a List of Object Arrays of size 2 containing a constant > Character as value and a constant String as label. The List is a static > final LinkedList. > > 2) To build a List of SelectItem instances, I iterate over the List > containing the Object Arrays in the following method: > > public static LinkedList createSelectItemsListCharKey(List objArrList) { > LinkedList linkedList = new LinkedList(); > Iterator it = objArrList.iterator(); > while (it.hasNext()) { > Object arr[] = (Object[])it.next(); > Character value = (Character)arr[0]; > String label = (String)arr[1]; > linkedList.add(new SelectItem(value, label)); > } > return linkedList; > } > > --- > > I think the problem is caused by the fact that step 2 is > performed more than > once with the same List from step 1, because I need the options > in more than > one selectOneMany. > > When I do this, I get the following error, and "umfrTypOptions" is one of > many Lists of SelectItem instances. There are others build in other > Backing-Beans. > > Value binding '#{UmfrSuperManUmfrTabBacking.umfrTypOptions}'of > UISelectItems with component-path {Component-Path : [Class: > javax.faces.component.UIViewRoot,ViewId: > /Management/ManagementTabbedPane.jsp][Class: > javax.faces.component.html.HtmlForm,Id: managementForm][Class: > org.apache.myfaces.custom.tabbedpane.HtmlPanelTabbedPane,Id: _id1][Class: > org.apache.myfaces.custom.tabbedpane.HtmlPanelTab,Id: tab3][Class: > javax.faces.component.html.HtmlPanelGrid,Id: _id158][Class: > org.apache.myfaces.custom.column.HtmlSimpleColumn,Id: _id161][Class: > javax.faces.component.html.HtmlSelectOneMenu,Id: umfragetyp2][Class: > javax.faces.component.UISelectItems,Id: _id162]} does not reference an > Object of type SelectItem, SelectItem[], Collection or Map but of type : > null > java.lang.IllegalArgumentException: Value binding > '#{UmfrSuperManUmfrTabBacking.umfrTypOptions}'of UISelectItems with > component-path {Component-Path : [Class: > javax.faces.component.UIViewRoot,ViewId: > /Management/ManagementTabbedPane.jsp][Class: > javax.faces.component.html.HtmlForm,Id: managementForm][Class: > org.apache.myfaces.custom.tabbedpane.HtmlPanelTabbedPane,Id: _id1][Class: > org.apache.myfaces.custom.tabbedpane.HtmlPanelTab,Id: tab3][Class: > javax.faces.component.html.HtmlPanelGrid,Id: _id158][Class: > org.apache.myfaces.custom.column.HtmlSimpleColumn,Id: _id161][Class: > javax.faces.component.html.HtmlSelectOneMenu,Id: umfragetyp2][Class: > javax.faces.component.UISelectItems,Id: _id162]} does not reference an > Object of type SelectItem, SelectItem[], Collection or Map but of type : > null > at > org.apache.myfaces.util.SelectItemsIterator.hasNext(SelectItemsIte > rator.java > :142) > > > Do you know why this doesn't work? The collection or map pointed to in the > error message cannot really be null, I think that's only a > symptom produced > by JSF... When I use a step 2 List only one time, no error happens. > > > Regards, > > Matthias >
