1. Messages
  2. What's wrong with this code? It throws NoSuchElementException when I try to add an Edge?

What's wrong with this code? It throws NoSuchElementException when I try to add an Edge?

刑天 <gaoxtw...@...>
 




package com.sankuai.kg;


import java.io.File;
import java.util.Iterator;


import org.apache.commons.io.FileUtils;
import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal;
import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversalSource;
import org.apache.tinkerpop.gremlin.structure.Graph;
import org.apache.tinkerpop.gremlin.structure.Transaction;
import org.apache.tinkerpop.gremlin.structure.Vertex;
import org.apache.tinkerpop.gremlin.structure.util.empty.EmptyGraph;


public class Loader {


    public static void main(String[] args) throws Exception {
        Graph graph = EmptyGraph.instance();
        GraphTraversalSource g = graph.traversal().withRemote("remote-graph.properties");
        Iterator<String> lineIt = FileUtils.lineIterator(new File(args[0]));
        while (lineIt.hasNext()) {
            String line = lineIt.next();
            String[] cols = line.split(",");
           
            GraphTraversal<Vertex, Vertex> t1 = g.V().has("poiId", cols[0]);
            GraphTraversal<Vertex, Vertex> t2 = g.V().has("poiId", cols[3]);


            if (!t1.hasNext())
                g.addV().property("poiId", cols[0]).property("name", cols[1]).property("type", cols[2]).next();
            if (!t2.hasNext())
                g.addV().property(String.format("propId", cols[5]), cols[3]).property("name", cols[4])
                        .property("type", cols[5]).next();
            g.V().has("poiId", cols[0]).as("a").V().has("propId", cols[3]).as("b").addE(cols[6])
                    .from("a").to("b").next();
           
        }


        g.close();
    }


}
Join {janusgraph-users@lists.lfaidata.foundation to automatically receive all group messages.