查找基于多个主题的三元组 (SANSA-STACK)

Question

我有一个使用主题查找三元组的代码，所以我正在使用三元组的查找方法并提供必要的信息，如下所示：

  import net.sansa_stack.rdf.spark.model._

  val node1 = NodeFactory.createURI("http://dbpedia.org/resource/Charles_Dickens")
  val result: RDD[graph.Triple] = triplesRdd.find(Some(node1), None, None)

但是我怎样才能找到可以传递多个主题节点的结果？

  val node1 = NodeFactory.createURI("http://dbpedia.org/resource/Charles_Dickens")
  val node2 = NodeFactory.createURI("http://dbpedia.org/resource/Henry_James")
  val nodes = List(node1, node2)

  //Here I want to pass list of Subject notes
  val result = triplesRdd.find(Some(node2),None,None)

Answer 1

尝试此代码并检查是否有帮助，

  val node1 = NodeFactory.createURI("http://dbpedia.org/resource/Charles_Dickens")
  val node2 = NodeFactory.createURI("http://dbpedia.org/resource/Henry_James")
  val nodes = List(node1, node2)

  //Just use filter instead of find ,it will create new RDD containing only items matching those provided subjects
  val result = tripleRDD.filter(triple => nodes.contains(triple.getSubject))
  result.toDF().show(1000,truncate = false)

查找基于多个主题的三元组 (SANSA-STACK)

Finding triples based on multiple subjects (SANSA-STACK)

rdf

jena

triples

sansa