Re: GWT 2.5 RC2 EntityProxy Validation

I just tried to implement clientside validation like that and ran into the problem that I get "Incompatible return types" for @OneToMany etc. associations as one has to use the Proxy types as return types in the Proxy interfaces and the Entity interfaces in the Entity interfaces. Anyone has an idea how it could be possible to get around that? :)

Am Samstag, 13. Oktober 2012 05:29:10 UTC+2 schrieb Daniel Mauricio Patino León:

Hello there.

I have a question of wich is the best option to validate my domain objects on the client side with RequestFactory.

It's posible to validate a Proxy with the new Validation of 2.5 RC2 ?

If i do a validation of my proxy don't get any constraints violations.

What i did to get a work arround of this was move the anoations to my proxy:

@ProxyFor(value=Employee.class, locator=EntityLocator.class)

public interface EmployeeProxy extends EntityProxy {

@NotNull(message="Cannot be empty.")

@Size(min = 4, message = "Name must be at least 4 characters long.")

public String getFirstName();

        /* ......................   */

}

Then i implemented that interface on my domain object.

@Entity

public class Employee extends EntityBase implements EmployeeProxy {

      @Column(nullable = false)

      private String firstName;

      @Override

public String getFirstName() {

return firstName;

}

       /* ......................   */

       @Override

public EntityProxyId<?> stableId() {

return null;

}

}

Now i get validation on the client side with:

EmployeeRequest request = requestFactory.employeeRequest();

EmployeeProxy employeeProxy = request.create(EmployeeProxy.class);

request.addNewEmployee(employeeProxy);

driver.edit(employeeProxy, request);

Set<ConstraintViolation<EmployeeProxy>> violations = validator.validate(employeeProxy);

System.out.println(violations);

and also on the server side when i click on save button with this:

driver.flush().fire(new Receiver<Void>() {

@Override

public void onSuccess(Void response) {

Window.alert("Succeed");

}

@Override

public void onConstraintViolation(Set<ConstraintViolation<?>> violations) {

//ConstraintViolation<?> violation = violations.iterator().next();

//Window.alert(violation.getMessage() + " " +violation.getPropertyPath().toString());

for(ConstraintViolation<?> violation: violations){

if(violation.getPropertyPath().toString().equals("age")){

ageError.setText(violation.getMessage());

}else if(violation.getPropertyPath().toString().equals("firstName")){

firstNameError.setText(violation.getMessage());

}else if(violation.getPropertyPath().toString().equals("lastName")){

lastNameError.setText(violation.getMessage());

}

}

// ... others

}

});

I this correct?

This can cause problems ?

thank you.

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