Spring custom Generic converter not working - spring-mvc

Question

In my spring mvc web-application i use a generic converter that converts String (id) to Company by fetch using (service and dao) components
first of all in my MVC-config i add the converter like follow :
#Override
public void addFormatters(FormatterRegistry registry) {
registry.addConverter(new GenericIdToCompanyConverter(new CompanyServiceImp()));
}
companyService
#Service
#Transactional
#Qualifier("companyService")
public class CompanyServiceImp implements ICompanyService {
#Resource
#Qualifier("companyDAO")
private ICompanyDao dao;
public void setDao(ICompanyDao dao) {
this.dao = dao;
}
#Override
public Company find(Long id) throws BusinessException {
Company current = dao.find(id);
if(current == null) {
throw new BusinessException("notFound");
}
return current;
}
....
}
Generic converter :
public class GenericIdToCompanyConverter implements GenericConverter {
private ICompanyService companyService;
public GenericIdToCompanyConverter(ICompanyService companyService) {
super();
this.companyService = companyService;
}
#Override
public Set<ConvertiblePair> getConvertibleTypes() {
ConvertiblePair[] pairs = new ConvertiblePair[] { new ConvertiblePair(Number.class, Company.class), new ConvertiblePair(String.class, Company.class) };
return ImmutableSet.copyOf(pairs);
}
#Override
public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
long id = 0;
if( sourceType.getType() == String.class) {
try {
id = Long.valueOf((String) source);
}catch(NumberFormatException e) {
return null;
}
}else if( sourceType.getType() == Number.class) {
id = (Long) source;
}else {
return null;
}
try {
return companyService.find(Long.valueOf(id));
} catch (BusinessException e) {
return null;
}
}
}
and here the controller that receives data form (via ajax request)
public #ResponseBody JsonResponseBean applay(#Valid VoucherForm form, BindingResult result, Locale locale) throws BusinessException {
....
}
where VoucherForm has these attributes
public class VoucherForm{
protected Long id;
protected Company company;
...
}
when i run the application and call controller method it returns type mismatch error for company attribute
and when i execute this on debug mode i see that it fails on serviceCompany - dao.find(id) statment where my dao is == null
Please help

Answer 1

finally i have to autowire the converter
Mvc-config
....
#Autowired
private GenericIdToCompanyConverter genericIdToCompanyConverter;
#Override
public void addFormatters(FormatterRegistry registry) {
registry.addConverter(genericIdToCompanyConverter);
}
and update the converter like follow :
public class GenericIdToCompanyConverter implements GenericConverter {
#Resource
#Qualifier("companyService")
private ICompanyService companyService;
#Override
public Set<ConvertiblePair> getConvertibleTypes() {
....
}
#Override
public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
....
}
}