How to combine annotations for hibernate mapping?

Question

Assuming that (using JPA) I have an entity with an id:

...
@Id
@TableGenerator(name = "EVENT_GEN",
                table = "SEQUENCES",
                pkColumnName = "SEQ_NAME",
                valueColumnName = "SEQ_NUMBER",
                pkColumnValue = "ID_SEQUENCE",
                allocationSize=1)
private Long id;
...

how can I declare a custom annotation so the above id mapping will be :

@CustomIdAnnotation
private Long id

May be something like this SO answer.

Answer 1

As Neil Stockton mention, the meta annotation will probably be a part of next JPA version 2.2.

And for now, with JPA 2.1, I can use @Embeddable class for both id (@EmbeddedId) and non-id field (@Embedded)

Just to note that for @Embeddable, I can use a generic class, so it will be useful for any type + I can easily override my column attributes:

@Embeddable
@Getter @Setter @NoArgsConstructor // Lombok library
public class EmbeddableGeneric<T> {
    @Column 
    // other annotations
    T myField;
    
    ...
}

and in my entity class:

@Entity
@Getter @Setter @NoArgsConstructor // You know now what's this!
public class Person {

    @Id
    @GeneratedValue
    private Long id;

    @Embedded
    @AttributeOverride(name = "myField", column = @Column(name = "STRING_FIELD"))
    private EmbeddableGeneric<String> myString;

...
}

Let's wait for JPA 2.2 to overcome this verbosity.