Constraints.java

/*
 * Copyright 2014-2015 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 com.example;

import java.util.List;

import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;

import org.springframework.restdocs.constraints.ConstraintDescriptions;

public class Constraints {

	@SuppressWarnings("unused")
	// tag::constraints[]
	public void example() {
		ConstraintDescriptions userConstraints = new ConstraintDescriptions(UserInput.class); // <1>
		List<String> descriptions = userConstraints.descriptionsForProperty("name"); // <2>
	}

	static class UserInput {

		@NotNull
		@Size(min = 1)
		String name;

		@NotNull
		@Size(min = 8)
		String password;

	}
	// end::constraints[]

}