Object

com.datastax.bdp.graph.spark.graphframe

Order

Related Doc: package graphframe

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object Order

spark-shell show error: "ambiguous reference to overloaded definition" for two functions: GraphTraversal.by(Order) GraphTraversal.by(Comparable) * scala> g.V().values("name").order().by(Order.decr) console>:43: error: ambiguous reference to overloaded definition, both method by in trait GraphTraversal of type (x$1: org.apache.tinkerpop.gremlin.process.traversal.Order)org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal[org.apache.spark.sql.Row,E2] and method by in trait GraphTraversal of type (x$1: java.util.Comparator[E2])org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal[org.apache.spark.sql.Row,E2] match argument types (org.apache.tinkerpop.gremlin.process.traversal.Order)

To workaround this problem you should directly cast Order to super class: Comparable scala> g.V().values("name").order().by(Order.decr.asInstanceOf[Order])

that is inconvenient for user. This class is replicate the Order interface but returns Comparable instread of Order. It is used in spark-shell imports

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  7. val decr: Comparator[_]

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  8. val desc: Comparator[_]

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