Null value in the first itemUnselect event on primefaces autoComplete - primefaces

Question

I am facing a strange situation when using primefaces p:autoComplete. I put this piece of code in a xhtml file, inside a h:form tag:
<p:autoComplete id="to"
multiple="true"
value="#{editEmailComponent.receiversEntitiesToDummy}"
completeMethod="#{editEmailComponent.completeQuery}"
emptyMessage="#{text['list.empty']}"
var="ent"
itemLabel="#{ent.class.simpleName eq 'EntityGroupHeader'? ent.design : (ent.class.simpleName eq 'EntityContactList'? ent.email : ent.abstractEntityEmail)}"
itemValue="#{ent}"
forceSelection="true"
cache="false"
styleClass="full-width"
autocomplete="none">
<o:converter converterId="omnifaces.ListConverter"
list="#{editEmailComponent.receiversAllConverter}" />
<p:column>
<h:outputText rendered="#{(ent.class.simpleName ne 'EntityGroupHeader') and (ent.class.simpleName ne 'EntityContactList')}" value="\# #{ent.number}" />
<h:outputText rendered="#{ent.class.simpleName eq 'EntityGroupHeader'}" value="\# #{ent.design}" />
<h:outputText rendered="#{ent.class.simpleName eq 'EntityContactList'}" value="#{ent.nif}" />
</p:column>
<p:column>
<h:outputText rendered="#{(ent.class.simpleName ne 'EntityGroupHeader') and (ent.class.simpleName ne 'EntityContactList')}" value="#{ent.abstractEntityDesignation}" />
<h:outputText rendered="#{ent.class.simpleName eq 'EntityContactList'}" value="#{ent.designation}" />
</p:column>
<p:column>
<h:outputText rendered="#{(ent.class.simpleName ne 'EntityGroupHeader') and (ent.class.simpleName ne 'EntityContactList')}" value="#{ent.abstractEntityEmail}" />
<h:outputText rendered="#{ent.class.simpleName eq 'EntityContactList'}" value="#{ent.email}" />
</p:column>
<p:ajax event="query" process="#this"/>
<p:ajax event="itemSelect" process="#form" listener="#{editEmailComponent.onItemSelectTo}" update="to" />
<p:ajax event="itemUnselect" process="#form" listener="#{editEmailComponent.onItemUnselectTo}" update="to" />
</p:autoComplete>
The action associated to this itemUnselect event is:
public void onItemUnselectTo(UnselectEvent event) {
onItemUnselect(receiversEntitiesToDummy, event);
BaseObject obj2 = (BaseObject) event.getObject();
//Instancia da entidade e converter para receiver
if(obj2 instanceof EntityContactList){
EntityContactList aux = (EntityContactList) obj2;
for(Receiver rec : receiversTo)
if(rec.getEntity().equals(aux.getEntity()))
receiversTo.remove(rec);
}
private static void onItemUnselect(List<BaseObject> list, UnselectEvent event) {
BaseObject obj = (BaseObject) event.getObject();
list.remove(obj);
}
I initialize the list of this autocomplete like this:
private List<BaseObject> receiversEntitiesToDummy = new ArrayList<>();
...
EntityContactList result = entityManager.getEntityContactList(receiver.getEntity(),null);
receiversEntitiesToDummy.add(result);
So, when I remove this first element the "obj2" is null but when I search and select some object the "obj2" is properly filled. Anyone knows why this happens?
Note: I am using primefaces 5.2.

Answer 1

I solved my problem changing the way I populate the list with the first element.
Instead of this:
private List<BaseObject> receiversEntitiesToDummy = new ArrayList<>();
...
EntityContactList result = entityManager.getEntityContactList(receiver.getEntity(),null);
receiversEntitiesToDummy.add(result);
I put the first element using the query function and it works.
EntityContactList result = entityManager.getEntityContactList(receiver.getEntity(),null);
List<BaseObject> aux = new ArrayList<>();
if(receiver.getEntity().getAbstractEntityEmail() != null)
aux = completeQuery(receiver.getEntity().getAbstractEntityEmail());
if(aux.contains(result)){
int num = aux.indexOf(result);
EntityContactList another = (EntityContactList) aux.get(num);
receiversEntitiesToDummy.add(another);
}