diff options
Diffstat (limited to 'server/src/main/java/com/vaadin/data/Binder.java')
| -rw-r--r-- | server/src/main/java/com/vaadin/data/Binder.java | 30 |
1 files changed, 27 insertions, 3 deletions
diff --git a/server/src/main/java/com/vaadin/data/Binder.java b/server/src/main/java/com/vaadin/data/Binder.java index f9e076e13f..360daa73bf 100644 --- a/server/src/main/java/com/vaadin/data/Binder.java +++ b/server/src/main/java/com/vaadin/data/Binder.java @@ -728,6 +728,23 @@ public class Binder<BEAN> implements Serializable { */ public BindingBuilder<BEAN, TARGET> asRequired( ErrorMessageProvider errorMessageProvider); + + /** + * Sets the field to be required and delegates the required check to a custom validator. + * This means two things: + * <ol> + * <li>the required indicator will be displayed for this field</li> + * <li>the field value is validated by customRequiredValidator</li> + * </ol> + * + * @see HasValue#setRequiredIndicatorVisible(boolean) + * @param customRequiredValidator + * validator responsible for the required check + * @return this binding, for chaining + * @since + */ + public BindingBuilder<BEAN, TARGET> asRequired( + Validator<TARGET> customRequiredValidator); } /** @@ -885,11 +902,18 @@ public class Binder<BEAN> implements Serializable { @Override public BindingBuilder<BEAN, TARGET> asRequired( ErrorMessageProvider errorMessageProvider) { + return asRequired( + Validator.from( + value -> !Objects.equals(value, field.getEmptyValue()), + errorMessageProvider)); + } + + @Override + public BindingBuilder<BEAN, TARGET> asRequired( + Validator<TARGET> customRequiredValidator) { checkUnbound(); field.setRequiredIndicatorVisible(true); - return withValidator( - value -> !Objects.equals(value, field.getEmptyValue()), - errorMessageProvider); + return withValidator(customRequiredValidator); } /** |