ejava.examples.orm.rel.annotated

Class Media

java.lang.Object

ejava.examples.orm.rel.annotated.Media

@Entity
public class Media
extends Object

This class represents a media topic, for which there are many copies and authors. There are also many media in an Inventory

It is an example of a ManyToOne uni-directional relationship. There are zero to many MediaCopy(s) for each Media. However, there is no reference to the copies from Media. All access to the copies must come through querying the MediaCopies. MediaCopy happens to both "own" the relationship and be the only that it can be navigated by (uni-directional).

It is also an example of a OneToMany uni-directional relationship using a Join (or Link) table. There are zero to many Media in Inventory. However, there is no reference to the Inventory from this class or MEDIA table. The linkage is done through a separate table defined in the Inventory class. Inventory both "owns" the relationship and is the only side that it can be navigated by. It is also an example of ManyToMany bi-directional relationship. Each Media can have zero to many Authors. Each Author can have zero to many Media. Author "owns" the relationship (thus defines the join/link table). Media only defines the mapping back to Author. The relationship can be navigated by either side.

Field Summary

Fields

Modifier and Type	Field and Description
private Collection<Author>	authors
private long	id
private String	title

Constructor Summary

Constructors

Constructor and Description
Media()

Method Summary

Modifier and Type	Method and Description
Collection<Author>	getAuthors()
long	getId()
String	getTitle()
void	setAuthors(Collection<Author> authors)
void	setTitle(String title)
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

id

private long id

title

private String title

authors

private Collection<Author> authors

Constructor Detail

Media

public Media()

Method Detail

getId

public long getId()

getTitle

public String getTitle()

setTitle

public void setTitle(String title)

getAuthors

public Collection<Author> getAuthors()

setAuthors

public void setAuthors(Collection<Author> authors)

toString

public String toString()

Overrides:

toString in class Object