EDIT

import java.util.EnumSet;

import org.springframework.context.event.EventListener;

import eu.etaxonomy.cdm.persistence.hibernate.permission.CRUD;

import eu.etaxonomy.cdm.vaadin.event.ReferenceEditorAction;

import eu.etaxonomy.cdm.vaadin.view.reference.ReferencePopupEditor;

import eu.etaxonomy.vaadin.ui.view.DoneWithPopupEvent;

import eu.etaxonomy.vaadin.ui.view.DoneWithPopupEvent.Reason;

    ReferencePopupEditor newReferencePopup = null;

    @EventListener(condition = "#event.type == T(eu.etaxonomy.cdm.vaadin.event.AbstractEditorAction.Action).ADD")

    public void onReferenceEditorActionAdd(ReferenceEditorAction event) {

        if(getView() == null || event.getSourceView() != getView() ){

            return;

        }

        newReferencePopup = getNavigationManager().showInPopup(ReferencePopupEditor.class);

        newReferencePopup.grantToCurrentUser(EnumSet.of(CRUD.UPDATE, CRUD.DELETE));

        newReferencePopup.withDeleteButton(true);

        newReferencePopup.loadInEditor(null);

    }

    @EventListener

    public void onDoneWithPopupEvent(DoneWithPopupEvent event){

        if(event.getPopup() == newReferencePopup){

            if(event.getReason() == Reason.SAVE){

                Reference newReference = newReferencePopup.getBean();

                // TODO the bean contained in the popup editor is not yet updated at this point.

                //      so re reload it using the uuid since new beans will not have an Id at this point.

                newReference = getRepo().getReferenceService().find(newReference.getUuid());

                getView().getNomReferenceCombobox().setValue(newReference);

            }

            newReferencePopup = null;

        }

    }