add support for @Inheritance

[SingingBush]

Hibernate allows support for inheritance making it possible to things like this:

@Inheritance(strategy=InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn(name="content_type", discriminatorType=DiscriminatorType.STRING)
@Table("site_content")
public class SiteContent {
    @Id
    @Generated
    public uint id;

    @Column("title") @NotNull
    public string title;

    @Column("content") @NotNull
    public string content; // LONGTEXT
}

@Entity
@DiscriminatorValue("wikipage")
public class WikiPage : SiteContent {}

@Entity
@DiscriminatorValue("blogpost")
public class BlogPost : SiteContent {}

More information on @Inheritance and the related annotations can be found here.