springfox.bean.validators.plugins.BeanValidators.java Source code

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Here is the source code for springfox.bean.validators.plugins.BeanValidators.java

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/*
 *
 *  Copyright 2015 the original author or authors.
 *
 *  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 springfox.bean.validators.plugins;

import com.fasterxml.jackson.databind.introspect.AnnotatedMember;
import com.fasterxml.jackson.databind.introspect.BeanPropertyDefinition;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Optional;
import com.google.common.collect.FluentIterable;
import org.springframework.core.Ordered;
import springfox.documentation.spi.schema.contexts.ModelPropertyContext;

import java.lang.annotation.Annotation;
import java.lang.reflect.AnnotatedElement;

public class BeanValidators {
    public final static int BEAN_VALIDATOR_PLUGIN_ORDER = Ordered.HIGHEST_PRECEDENCE + 500;

    private BeanValidators() {
        throw new UnsupportedOperationException();
    }

    public static <T extends Annotation> Optional<T> validatorFromBean(ModelPropertyContext context,
            Class<T> annotationType) {

        Optional<BeanPropertyDefinition> propertyDefinition = context.getBeanPropertyDefinition();
        Optional<T> notNull = Optional.absent();
        if (propertyDefinition.isPresent()) {
            notNull = annotationFrom(propertyDefinition.get().getGetter(), annotationType)
                    .or(annotationFrom(propertyDefinition.get().getField(), annotationType));
        }
        return notNull;
    }

    public static <T extends Annotation> Optional<T> validatorFromField(ModelPropertyContext context,
            Class<T> annotationType) {

        Optional<AnnotatedElement> annotatedElement = context.getAnnotatedElement();
        Optional<T> notNull = Optional.absent();
        if (annotatedElement.isPresent()) {
            notNull = Optional.fromNullable(annotatedElement.get().getAnnotation(annotationType));
        }
        return notNull;
    }

    @VisibleForTesting
    static <T extends Annotation> Optional<T> annotationFrom(AnnotatedMember nullableMember,
            Class<T> annotationType) {

        Optional<AnnotatedMember> member = Optional.fromNullable(nullableMember);
        Optional<T> notNull = Optional.absent();
        if (member.isPresent()) {
            notNull = FluentIterable.from(member.get().annotations()).filter(annotationType).first();
        }
        return notNull;
    }

}