It's ugly but it works. If you have a better workaround please share.
The idea is instead of querying for List<ContactProxy> you query for
List<ContactWrapperProxy>.
Then you call ContactWrapper.getPersonContact(). If it returns non-null
value then it's a person.
Otherwise you call ContactWrapper.getCompanyContact() and repeat the check.
Server:
class ContactWrapper {
private PersonContact personContact;
private CompanyContact companyContact;
// returns null if not a PersonContact
public PersonContact getPersonContact() { return personContact; }
public void setPersonContact(PersonContact personContact) {
this.personContact = personContact; }
// returns null if not a CompanyContact
public CompanyContact getCompanyContact() { return companyContact; }
public void setCompanyContact(CompanyContact companyContact) {
this.companyContact = companyContact; }
}
class SomeService {
public static List<ContactWrapper> queryContracts() {
final List<Contact> contacts = // polymorphic JPA query
final List<ContactWrapper> ret = new
ArrayList<ContactWrapper>(contacts.size());
for(Contact c : contacts) {
final ContactWrapper w = new ContactWrapper();
if(contact intanceof CompanyContact) {
w.setCompanyContact((CompanyContact)c)
}
else if(contact intanceof PersonContact) {
w.setPersonContact((PersonContact)c)
}
ret.add(w);
}
return ret;
}
}
Client:
@ProxyFor(ContactWrapper.class)
interface ContactWrapperProxy extends ValueProxy (
PersonContactProxy getPersonContact();
CompanyContact getCompanyContact();
}
@Service(SomeService.class)
interface SomeServiceRequest exntends RequestContext {
// return List<ContactWrapperProxy> instead of List<ContactProxy>
List<ContactWrapperProxy> queryContracts();
}
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