Examples with HasValue com.vaadin.flow.component.HasValue used on opensource projects

Example 1 with HasValue

use of com.vaadin.flow.component.HasValue in project flow by vaadin.

the class BinderTest method setValidationErrorHandler_handlerIsSet_handlerMethodsAreCalled.

@Test
public void setValidationErrorHandler_handlerIsSet_handlerMethodsAreCalled() {
    TestTextField testField = new TestTextField();
    class TestErrorHandler implements BinderValidationErrorHandler {

        private ValidationResult result;

        private boolean clearIsCalled;

        @Override
        public void handleError(HasValue<?, ?> field, ValidationResult result) {
            Assert.assertSame(testField, field);
            this.result = result;
            clearIsCalled = false;
        }

        @Override
        public void clearError(HasValue<?, ?> field) {
            Assert.assertSame(testField, field);
            result = null;
            clearIsCalled = true;
        }
    }
    ;
    TestErrorHandler handler = new TestErrorHandler();
    binder.setValidationErrorHandler(handler);
    binder.forField(testField).asRequired().withValidator((val, context) -> {
        if ("bar".equals(val)) {
            return ValidationResult.error("foo");
        }
        return ValidationResult.ok();
    }).bind(Person::getFirstName, Person::setFirstName);
    binder.setBean(new Person());
    testField.setValue("bar");
    Assert.assertTrue(handler.result.isError());
    Assert.assertFalse(handler.clearIsCalled);
    testField.setValue("foo");
    Assert.assertNull(handler.result);
    Assert.assertTrue(handler.clearIsCalled);
    Assert.assertSame(handler, binder.getValidationErrorHandler());
}

Example 2 with HasValue

use of com.vaadin.flow.component.HasValue in project flow by vaadin.

the class Binder method bindProperty.

/**
 * Binds {@code property} with {@code propertyType} to the field in the
 * {@code objectWithMemberFields} instance using {@code memberField} as a
 * reference to a member.
 *
 * @param objectWithMemberFields
 *            the object that contains (Java) member fields to build and
 *            bind
 * @param memberField
 *            reference to a member field to bind
 * @param property
 *            property name to bind
 * @param propertyType
 *            type of the property
 * @return {@code true} if property is successfully bound
 */
private boolean bindProperty(Object objectWithMemberFields, Field memberField, String property, Class<?> propertyType) {
    Type valueType = GenericTypeReflector.getTypeParameter(memberField.getGenericType(), HasValue.class.getTypeParameters()[1]);
    if (valueType == null) {
        throw new IllegalStateException(String.format("Unable to detect value type for the member '%s' in the " + "class '%s'.", memberField.getName(), objectWithMemberFields.getClass().getName()));
    }
    if (propertyType.equals(GenericTypeReflector.erase(valueType))) {
        HasValue<?, ?> field;
        // Get the field from the object
        try {
            field = (HasValue<?, ?>) ReflectTools.getJavaFieldValue(objectWithMemberFields, memberField, HasValue.class);
        } catch (IllegalArgumentException | IllegalAccessException | InvocationTargetException e) {
            // If we cannot determine the value, just skip the field
            return false;
        }
        if (field == null) {
            field = makeFieldInstance((Class<? extends HasValue<?, ?>>) memberField.getType());
            initializeField(objectWithMemberFields, memberField, field);
        }
        forField(field).bind(property);
        return true;
    } else {
        throw new IllegalStateException(String.format("Property type '%s' doesn't " + "match the field type '%s'. " + "Binding should be configured manually using converter.", propertyType.getName(), valueType.getTypeName()));
    }
}