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/*
* Copyright 2000-2016 Vaadin Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.vaadin.data;
import java.lang.annotation.Annotation;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;
import com.vaadin.server.SerializablePredicate;
/**
* This interface represents a predicate which returns {@code true} if bound
* field should be configured to have required indicator via
* {@link HasValue#setRequiredIndicatorVisible(boolean)}.
*
* @see BeanValidationBinder
* @see BeanValidationBinder#setRequiredConfigurator(RequiredFieldConfigurator)
*
* @author Vaadin Ltd
* @since 8.0
*
*/
public interface RequiredFieldConfigurator
extends SerializablePredicate<Annotation> {
/**
* Configurator which is aware of {@literal @NotNull} annotation presence
* for a property.
*/
public RequiredFieldConfigurator NOT_NULL = annotation -> annotation
.annotationType().equals(NotNull.class);
/**
* Configurator which is aware of {@literal @NotEmpty} annotation presence
* for a property.
*/
public RequiredFieldConfigurator NOT_EMPTY = annotation -> annotation
.annotationType().getName()
.equals("org.hibernate.validator.constraints.NotEmpty");
/**
* Configurator which is aware of {@literal Size} annotation with
* {@code min()> 0} presence for a property.
*/
public RequiredFieldConfigurator SIZE = annotation -> annotation
.annotationType().equals(Size.class)
&& ((Size) annotation).min() > 0;
/**
* Default configurator which is combination of {@link #NOT_NULL},
* {@link #NOT_EMPTY} and {@link #SIZE} configurators.
*/
public RequiredFieldConfigurator DEFAULT = NOT_NULL.chain(NOT_EMPTY)
.chain(SIZE);
public default RequiredFieldConfigurator chain(
RequiredFieldConfigurator configurator) {
return descriptor -> test(descriptor) || configurator.test(descriptor);
}
}
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