OrientIndexHandler.scala

class OrientIndexHandler(graph: OrientGraph) extends IndexHandler {

  override def createUniqueIndexField[ModelType, FieldType](field: Field[ModelType, FieldType], label: String): Unit = {

    val keyName = field.name
    val indexName = s"idx${label}_$keyName"

    val vertexType = graph.getVertexType(label)
    if (!vertexType.existsProperty(keyName)) {
      field match {
        case uuidField: UuidField[_] =>
          UuidPropertyCreator(keyName, indexName, vertexType)
        case _ =>
          // Ignore this field
      }
    }

  }

  override def createFulltextIndexField(property: String, label: String): Unit = {

  }

  /**
   * UUID field property creator
   */
  object UuidPropertyCreator {

    def apply[ModelType](keyName: String, indexName: String, vertexType: OrientVertexType) = {
      vertexType.createProperty(keyName, OType.STRING).setMin("36").setMax("36").setMandatory(true)
      vertexType.createIndex(indexName, OClass.INDEX_TYPE.UNIQUE, keyName)
    }

  }
}

OrientVertexBuilder.scala

class OrientVertexBuilder(graph: TransactionalGraph) extends VertexBuilder {

  /**
   * Vertex creator method
   *
   * @param label
   * @return
   */
  override def createVertexWithLabel(label: String): Vertex = {

    val vertex = graph match {
      case og: OrientGraph =>

        og.addVertex(label, null).asInstanceOf[Vertex]
      case _ =>
        graph.addVertex(null)

    }

    vertex
  }
}