Question

I can’t find an @Equal constraint in Play! 2.

I looked through the API
http://www.playframework.org/documentation/api/2.0.2/java/index.html

I want to have a SignupForm that checks if the passwords are equal. I don’t believe that I have to write my own constraint for such a common problem.

Something like:

...
@Min(6)
public String password;
@Equal(password)
public String confirmPassword;
...

Answer 1

I don’t any @Equal contraint in other Java framework neither in the JSR 303.

To check for password, it’s not difficult: in your form object, just write a public String validate() method:

public class SignupForm {

    @Min(6)
    public String password;

    @Min(6)
    public String confirmPassword;

    public String validate() {
        if(!password.equals(confirmPassword)) {
            return "Password mismatch";
        }
        return null;
    }

}

Take a look at the zentask sample, in this class.