invalid value expression listshuttle [ RichFaces 3.3.3CR1]

[psini]

I have the previous error (invalid value expression  ) in a listshuttle only when i load the targetValue with a non empty list an tyrying to save the changes tha the user have done to the list .

<rich:listShuttle id="pkl" sourceValue="#{assegnaCoordinatori.listaProvinceDaAssegnare}"
            targetValue="#{assegnaCoordinatori.listaProvinceAssegnate}" var="items" listsHeight="150"
            sourceListWidth="130" targetListWidth="130" sourceCaptionLabel="Province Da Assegnare"
            targetCaptionLabel="Province Assegnate al rilevatore selezionato"
            converter="ENTCONV_UT"  fastOrderControlsVisible="false"  orderControlsVisible="false" sourceRequired="false" targetRequired="false" 
            > 
            
            <rich:column>
                <h:outputText value="#{items.nomeProv}"></h:outputText>
            </rich:column>
           
            <a4j:support event="onlistchanged" action="#{assegnaCoordinatori.modified}" immediate="true" />  
        </rich:listShuttle>

The simptom is thatwhen i load the listShuttel with empty list is all ok

#{assegnaCoordinatori.listaProvinceAssegnate}

while if the list is not empty i get the error:

sourceId=j_id46:pkl[severity=(ERROR 2), summary=("Component j_id46:pkl has invalid value expression utenti.hibernate.Province@bab0"), detail=("Component j_id46:pkl has invalid value expression utenti.hibernate.Province@bab0")]

The behind code in the managed bean is :

List<Province> listaProvinceDaAssegnare;
    List<Province> listaProvinceAssegnate;

and a init in the costructor

listaProvinceAssegnate=afacade.getProvincieAssegnateCoordinatori(getUser().getId(),selectedCoordinatore);

istaProvinceDaAssegnare=afacade.getProvincieDaAssegnareCoordinatori(getUser().getId());

I had already checked my converter that don't thow any Exception

so which can be the problem?

[psini]

With more time i noticed that this happens where the listshuttle is reRerendered from another component:

another example is :

<h:form >
 <h:outputText value="Coordinatori "/><br />
         <h:selectOneListbox id="coordinatori" value="#{assegnaCoordinatori.selectedCoordinatore}"    converter="ENTCONV_UT"  validator="ENTVAL" immediate="true" styleClass="select_style">
                    <s:selectItems value="#{assegnaCoordinatori.listaCoordinatori}" var="age" label="#{age.codFisc}"   />
         <a4j:support event="onchange"     action="#{test.onSelectCoordinatore}" reRender="tes"    >
             
         </a4j:support>
         </h:selectOneListbox>
 <rich:listShuttle id="tes" targetValue="#{test.listaOut}" sourceValue="#{test.listaIn}" var="items" fastOrderControlsVisible="false"  orderControlsVisible="false" sourceRequired="false" targetRequired="false">
 
  
            <rich:column>
                <h:outputText value="#{items}"></h:outputText>
            </rich:column>
           
            <a4j:support event="onlistchanged" action="#{test.save}" immediate="true" />  
            
 </rich:listShuttle>
 </h:form>

and the test bean is :

public List<String> listaIn;
    public List<String> listaOut;
    public test() {
        super();
        listaIn= new ArrayList<String>();
        listaOut=new ArrayList<String>();
        listaIn.add("A");
        listaIn.add("B");
        listaIn.add("C");
        listaOut.add("D");
        
        
    }
    public List<String> getListaIn() {
        return listaIn;
    }
    public void setListaIn(List<String> listaIn) {
        this.listaIn = listaIn;
    }
    public List<String> getListaOut() {
        return listaOut;
    }
    public void setListaOut(List<String> listaOut) {
        this.listaOut = listaOut;
    }
    
    public void save(){
        
        return;
    }
    
    public void onSelectCoordinatore(){
        listaOut.add("K");
        return;
    }

and the error :

sourceId=j_id62:tes[severity=(ERROR 2), summary=("Component j_id62:tes has invalid value expression K"), detail=("Component j_id62:tes has invalid value expression K")]

[ilya_shaikovsky]

For the second case - you have no converter at all.

for the first case - I gues converter just works in wrong way or equals() and hasCode() methods implemented wrong. This thread was risen many times at this forum and it's always had a solution by just debugging converter methods.

Provide simple war sample for investigation if will not be able to solve on your own.

[psini]

the solution is to use a <a4j:keepAlive> with  the bean name .

Thanks a lot.