EDIT

import org.springframework.beans.factory.annotation.Autowired;

import eu.etaxonomy.cdm.service.IRegistrationWorkingSetService;

import eu.etaxonomy.cdm.vaadin.util.converter.TypeDesignationSetManager.TypeDesignationWorkingSet;

import eu.etaxonomy.cdm.vaadin.view.registration.RegistrationDTO;

    @Autowired

    private IRegistrationWorkingSetService registrationWorkingSetService;

    /**

     * {@inheritDoc}

     */

    @Override

    protected NameTypeDesignation loadBeanById(Object identifier) {

        if(identifier instanceof Integer || identifier == null){

            return super.loadBeanById(identifier);

        } else {

            TypeDesignationWorkingsetEditorIdSet idset = (TypeDesignationWorkingsetEditorIdSet)identifier;

            RegistrationDTO regDTO = registrationWorkingSetService.loadDtoById(idset.registrationId);

            // find the working set

            TypeDesignationWorkingSet typeDesignationWorkingSet = regDTO.getTypeDesignationWorkingSet(idset.workingsetId);

            int nameTypeDesignationId = typeDesignationWorkingSet.getBaseEntityReference().getId();

            // NameTypeDesignation bameTypeDesignation = regDTO.getNameTypeDesignation(typeDesignationWorkingSet.getBaseEntityReference());

            if(!typeDesignationWorkingSet.getBaseEntityReference().getType().equals(NameTypeDesignation.class)){

                throw new RuntimeException("TypeDesignationWorkingsetEditorIdSet references not a NameTypeDesignation");

            }

            return super.loadBeanById(nameTypeDesignationId);

        }

    }