@Retention(CLASS) @Target({FIELD})

public @interface Required

Marks a @Bind field whose component must hold a non-empty value. The binder generated by the Codename One Maven plugin installs a com.codename1.ui.validation.LengthConstraint(1) on the matching component and wires it into the Validator returned by Binding#getValidator().

@Bindable
public class SignupModel {
    @Bind(name="userField") @Required
    private String user;
}

Stack with other validation annotations – the constraints are combined (AND) via Validator.addConstraint(Component, Constraint...). The first failing constraint’s message is shown.

Methods

public abstract String message() default "" Override the default error message (“A value is required”).

Method details

message

public abstract String message() default ""

Override the default error message (“A value is required”).