/*
* 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 openbook.domain;
import java.util.HashSet;
import java.util.Set;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.ManyToMany;
import javax.persistence.Version;
/**
* A persistent entity to represent an author of one or more Book.
* <br>
* <b>Notes</b>: No setter for identity value.
* <br>
* <LI><b>Identity</b>:Generated value as identity.
* <LI><b>Mapping</b>:Many-to-Many mapping to Books.
* <LI><b>Version</b>: Yes.
*
* @author Pinaki Poddar
*
*/
@Entity
public class Author {
@Id
@GeneratedValue
private long id;
private String name;
@ManyToMany(mappedBy="authors")
private Set<Book> books;
@Version
private int version;
public long getId() {
return id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Set<Book> getBooks() {
return books;
}
public void addBook(Book book) {
if (books == null)
books = new HashSet<Book>();
books.add(book);
}
public int getVersion() {
return version;
}
}