[jnosql-dev] Creates a @UniqueName in Graph API

[Otávio Gonçalves de Santana <otaviopolianasantana@xxxxxxxxx>]

Currently, the Graph integrates with Tinkerpop, and that has Id whose some implementation does not allow a defined Id, so:

Guest hillmer = Guest.of("Hillmer");
hillmer = graphTemplate.insert(hillmer);

Guest hillmer2 = Guest.of("Hillmer");
hillmer2 = graphTemplate.insert(hillmer2);

Guest hillmer3 = Guest.of("Hillmer");
hillmer3 = graphTemplate.insert(hillmer3);

Inspired by NaturalId from hibernate the goal is create a UniqueName.

So,

@Entity
public class Guest {
@Id
private Long id;

@UniqueVertexProperty
@Column
private String name;
}

So:

Guest hillmer = Guest.of("Hillmer");
hillmer = graphTemplate.insert(hillmer);

Guest hillmer2 = Guest.of("Hillmer");
hillmer2 = graphTemplate.insert(hillmer2);// an exception because cannot insert twice

• https://docs.jboss.org/hibernate/orm/5.0/mappingGuide/en-US/html/ch07.html
• https://www.thoughts-on-java.org/naturalid-good-way-persist-natural-ids-hibernate/

Ref: https://github.com/eclipse/jnosql-artemis/issues/42

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Otávio Gonçalves de Santana

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