feat: allow disabling validation status change listener registration …

…on binder (#14158) (CP: 9.0) (#14199)

Add binder-level flag to allow disabling of 
validation status change listener registration 
for HasValidator fields.

Related to #13940 (comment) and #13940 (comment)

Co-authored-by: Knoobie <Knoobie@gmx.de>
Co-authored-by: Marco Collovati <marco@vaadin.com>

flow-data/src/main/java/com/vaadin/flow/data/binder/Binder.java

@@ -1221,7 +1221,8 @@ public BindingImpl(BindingBuilderImpl<BEAN, FIELDVALUE, TARGET> builder,
             onValueChange = getField().addValueChangeListener(
                     event -> handleFieldValueChange(event));
 
-            if (getField() instanceof HasValidator) {
+            if (getBinder().isFieldsValidationStatusChangeListenerEnabled()
+                    && getField() instanceof HasValidator) {
                 HasValidator<FIELDVALUE> hasValidatorField = (HasValidator<FIELDVALUE>) getField();
                 onValidationStatusChange = hasValidatorField
                         .addValidationStatusChangeListener(
@@ -1679,6 +1680,8 @@ void setIdentity() {
 
     private boolean validatorsDisabled = false;
 
+    private boolean fieldsValidationStatusChangeListenerEnabled = true;
+
     /**
      * Creates a binder using a custom {@link PropertySet} implementation for
      * finding and resolving property names for
@@ -3448,6 +3451,30 @@ public boolean isValidatorsDisabled() {
         return validatorsDisabled;
     }
 
+    /**
+     * Control whether bound fields implementing {@link HasValidator} subscribe
+     * for field's {@code ValidationStatusChangeEvent}s and will
+     * {@code validate} upon receiving them.
+     *
+     * @param fieldsValidationStatusChangeListenerEnabled
+     *            Boolean value.
+     */
+    public void setFieldsValidationStatusChangeListenerEnabled(
+            boolean fieldsValidationStatusChangeListenerEnabled) {
+        this.fieldsValidationStatusChangeListenerEnabled = fieldsValidationStatusChangeListenerEnabled;
+    }
+
+    /**
+     * Returns if the bound fields implementing {@link HasValidator} subscribe
+     * for field's {@code ValidationStatusChangeEvent}s and will
+     * {@code validate} upon receiving them.
+     *
+     * @return Boolean value
+     */
+    public boolean isFieldsValidationStatusChangeListenerEnabled() {
+        return fieldsValidationStatusChangeListenerEnabled;
+    }
+
     /**
      * Sets a {@code handler} to customize the {@link RuntimeException} thrown
      * by delegates (like {@link Setter}, {@link ValueProvider},

flow-data/src/test/java/com/vaadin/flow/data/binder/BinderValidationStatusChangeListenerTest.java

@@ -63,6 +63,16 @@ public void fieldWithHasValidatorDefaults_bindIsCalled_addValidationStatusListen
                 .addValidationStatusChangeListener(Mockito.any());
     }
 
+    @Test
+    public void binderWithFieldsValidationStatusChangeListenerDisabled_bindIsCalled_noValidationStatusListenerIsCalled() {
+        binder.setFieldsValidationStatusChangeListenerEnabled(false);
+        TestHasValidatorDatePicker.DatePickerHasValidatorDefaults field = Mockito
+                .spy(TestHasValidatorDatePicker.DatePickerHasValidatorDefaults.class);
+        binder.bind(field, BIRTH_DATE_PROPERTY);
+        Mockito.verify(field, Mockito.never())
+                .addValidationStatusChangeListener(Mockito.any());
+    }
+
     @Test
     public void fieldWithHasValidatorOnlyGetDefaultValidatorOverridden_bindIsCalled_addValidationStatusListenerIsCalled() {
         TestHasValidatorDatePicker.DataPickerHasValidatorGetDefaultValidatorOverridden field = Mockito
@@ -101,6 +111,17 @@ public void fieldWithHasValidatorFullyOverridden_fieldValidationStatusChangesToF
         Assert.assertEquals(INVALID_DATE_FORMAT, componentErrors.get(field));
     }
 
+    @Test
+    public void binderWithFieldsValidationStatusChangeListenerDisabled_fieldValidationStatusChangesToFalse_binderHandleErrorIsNotCalled() {
+        binder.setFieldsValidationStatusChangeListenerEnabled(false);
+        TestHasValidatorDatePicker.DataPickerHasValidatorOverridden field = new TestHasValidatorDatePicker.DataPickerHasValidatorOverridden();
+        binder.bind(field, BIRTH_DATE_PROPERTY);
+        Assert.assertEquals(0, componentErrors.size());
+
+        field.fireValidationStatusChangeEvent(false);
+        Assert.assertEquals(0, componentErrors.size());
+    }
+
     @Test
     public void fieldWithHasValidatorFullyOverridden_fieldValidationStatusChangesToTrue_binderClearErrorIsCalled() {
         TestHasValidatorDatePicker.DataPickerHasValidatorOverridden field = new TestHasValidatorDatePicker.DataPickerHasValidatorOverridden();