defineRelation

Callable

• defineRelation<O, D>(tag: Tag, origin?: Class<O>, destination?: Class<D>, direction?: Direction): Relation<O, D>
• defineRelation(tag: Tag, direction?: Direction): Relation<CloudObject, CloudObject>

---

• Create a constant relation object between two specified DataTypes.

  That constant is used especially to create queries see Query.follow(relation)

  ---

  Type parameters

  • O: CloudObject<O>
  • D: CloudObject<D>

  Parameters

  • tag: Tag

    tag of the relation

  • optionalorigin: Class<O>

    origin DataType of the relation

  • optionaldestination: Class<D>

    destination DataType of the relation. Default is CloudObject

  • optionaldirection: Direction

    direction of the relation, pointing towards origin or destination. Default is DESTINATION

  Returns Relation<O, D>

  newly defined relation