Inheritance
- All entities must declare a primary key/identifier
- Primary keys should be of the following types: any Java primitive type, any primitive wrapper type; java.lang.String; java.util.Date; java.sql.Date
- Do not use floating-point types!
| Primary Key Example |
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- A primary key may be generated by the persistence provider
| Auto-Generated Key Example |
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@Entity
public class EntityClass {
private Long id;
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
public Long getId() {
return id;
}
}
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- The persistence provider may use a table/sequence to generate keys
| Table-Generated Key Example |
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Inheritance