/*
 * Copyright 2013-2015 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 org.springframework.data.rest.webmvc.jpa;

import java.util.HashSet;
import java.util.Set;

import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.ManyToMany;

import org.springframework.data.rest.core.annotation.RestResource;

/**
 * @author Oliver Gierke
 */
@Entity
public class Book {

	@Id @GeneratedValue Long id;
	public String isbn;

	@ManyToMany(cascade = { CascadeType.MERGE })//
	@RestResource(path = "creators") public Set<Author> authors;

	public String title;

	protected Book() {}

	public Book(String isbn, String title, Iterable<Author> authors) {

		this.isbn = isbn;
		this.title = title;

		this.authors = new HashSet<Author>();

		for (Author author : authors) {
			author.books.add(this);
			this.authors.add(author);
		}
	}
}
