Hi All, I am sorry for my previous email, I made a mistake and chose a wrong mailing list (neo4j instead of gremlin mailing list).
Best Regards, Wojtek Dnia 18 października 2011 9:59 skarab77 <[email protected]> napisał(a): > I need a pipe, which returns a set of vertices for an input Vertex (wrapped > in User Defined Step). I use blueprints pipes with Neo4j. My current code is: > > import org.junit.Test > import com.tinkerpop.blueprints.pgm.Graph > import com.tinkerpop.blueprints.pgm.Vertex > import com.tinkerpop.blueprints.pgm.impls.neo4j.Neo4jVertex > import com.tinkerpop.blueprints.pgm.impls.tg.TinkerGraphFactory > import com.tinkerpop.gremlin.Gremlin > import com.tinkerpop.pipes.AbstractPipe > import com.tinkerpop.pipes.Pipe > > class MyUDSTest { > > public static class MyPipe extends AbstractPipe<Vertex, Iterable<Vertex>> { > > @Override > protected Iterable<Vertex> processNextStart() throws > NoSuchElementException { > def v = this.starts.next(); > > def nodes = [v, v, v].iterator; > > return new Iterable<Vertex>() { > @Override > public Iterator<Vertex> iterator() { > return new Iterator<Vertex>() { > @Override > public boolean hasNext() { > return nodes.hasNext(); > } > > @Override > public Vertex next() { > return new Neo4jVertex(nodes.next(), graph); > } > > @Override > public void remove() { > throw new UnsupportedOperationException(); > > } > }; > } > }; > } > > } > > @Test > public void testUDS() > { > Gremlin.load(); > Graph g; > Gremlin.defineStep('myPipe',[Vertex,Pipe], { new MyPipe() }) > > g = TinkerGraphFactory.createTinkerGraph() > println "$g" > def result = [] > g.v(1).myPipe.filter{true} >> result > > result.each { > println "$it" > } > > } > > } > > However it does not work property in the gremlin expression: > > Gremlin.defineStep('myPipe',[Vertex,Pipe], { new MyPipe() }) > ... > def result = []; > g.v(1).myPipe >> result > > result.each > { > println it > } > > prints out: neo4j.MyUDSTest$MyPipe$1@49aacd5f. I would expect that I will get > a list of vertices. Could anybody help me with this pipe? > > _______________________________________________ Neo4j mailing list [email protected] https://lists.neo4j.org/mailman/listinfo/user
