Book (OpenJPA Parent POM 2.4.3 API)

All Implemented Interfaces:

Serializable
```
@Entity
public class Book
extends Object
implements Serializable
```
An immutable persistent entity represents a Book.
The mutable properties of the book such as number of items in stock etc. are factored out in a separate Inventory instance.
The state of inventory is mutable, but the relation to inventory is immutable.
Identity: Application-defined identity.
Mapping: One-to-One bi-directional, immutable mapping to Inventory. Many-to-Many bi-directional mapping to Author.
Version: No.

Constructors
Constructor and Description
`Book()` A no-arg constructor is required for JPA Specification.
`Book(String ISBN, String title, double price, int initialSupply)` Construct a book with given parameters.

Methods
Modifier and Type	Method and Description
`void`	`addAuthor(Author... authors)`
`boolean`	`equals(Object obj)`
`List<Author>`	`getAuthors()`
`Inventory`	`getInventory()`
`String`	`getISBN()`
`double`	`getPrice()`
`String`	`getTitle()`
`int`	`getVersion()`
`int`	`hashCode()`
`void`	`setAuthors(List<Author> authors)`

public void addAuthor(Author... authors)

public void setAuthors(List<Author> authors)

Class Book