Package org.neo4j.graphdb.traversal

Examples of org.neo4j.graphdb.traversal.Traverser.nodes()

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                .prune(Traversal.pruneAfterDepth(MAXIMUM_DEPTH))
                .filter(returnEval)
                .expand(Traversal.expanderForTypes(relType, Direction.BOTH));
        final Traverser traverser = traversalDescription
                .traverse(startNode);
        return traverser.nodes().iterator();
    }

    private static class PathReturnEval implements Predicate<Path> {
        private final Map<Node, Node> myNodes;
        private final Map<Node, Node> otherNodes;
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    public void testTraverseToNeighbour() {
        final Relationship rel = relationship();
        final TraversalDescription traversalDescription = RestTraversal.description().maxDepth(1).breadthFirst();
        System.out.println("traversalDescription = " + traversalDescription);
        final Traverser traverser = traversalDescription.traverse(rel.getStartNode());
        final Iterable<Node> nodes = traverser.nodes();
        Assert.assertEquals(rel.getEndNode(), nodes.iterator().next());
    }

}
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    public void testTraverseToNeighbour() {
        final Relationship rel = relationship();
        final TraversalDescription traversalDescription = RestTraversal.description().maxDepth(1).breadthFirst();
        System.out.println("traversalDescription = " + traversalDescription);
        final Traverser traverser = traversalDescription.traverse(rel.getStartNode());
        final Iterable<Node> nodes = traverser.nodes();
        Assert.assertEquals(rel.getEndNode(), nodes.iterator().next());
    }

}
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       */
      @Test
      public void checkTraverseByPropertiesRest() throws Exception {       
          Traverser heroesTraverserRest = getHeroesViaRest();
          Traverser heroesTraverserByPropertiesRest = getHeroesByNodePropertiesViaRest();
          assertEquals( heroesTraverserRest.nodes().iterator().next(), heroesTraverserByPropertiesRest.nodes().iterator().next() );
      }
     
      /**
       * check if rest traversal and traversal via the collection node return the same result
       * @throws Exception
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       */
      @Test
      public void checkTraverseByCollectionNode() throws Exception {       
          Traverser heroesTraverserRest = getHeroesViaRest();
          Traverser heroesTraverserByCollection = getHeroesByCollectionNodeViaRest();
          assertEquals( heroesTraverserRest.nodes().iterator().next(), heroesTraverserByCollection.nodes().iterator().next() );
      }     
     
     
      /**
       * returns a traverser for all nodes that have an outgoing relationship of the type KNOWS
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           public void compareIndexAndTraversal() throws Exception {
             IndexManager index = graphDb.index();            
             Index<Node> goodGuys = index.forNodes("heroes");
             IndexHits<Node> hits = goodGuys.query( "name", "*" );           
             Traverser heroesTraverser = getHeroes();              
               assertEquals( heroesTraverser.nodes().iterator().next().getId(), hits.iterator().next().getId() );
           }
          
          
           @Test
           public void checkTraverseByProperties() throws Exception {       
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           @Test
           public void checkTraverseByProperties() throws Exception {       
               Traverser heroesTraverser = getHeroes();
               Traverser heroesTraverserByProperties = getHeroesByNodeProperties();
               assertEquals( heroesTraverser.nodes().iterator().next(), heroesTraverserByProperties.nodes().iterator().next() );
           }
         
          
           /**
            * returns a traverser for all nodes that have an outgoing relationship of the type KNOWS
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    public void testTraverseToNeighbour() {
        final Relationship rel = relationship();
        final TraversalDescription traversalDescription = RestTraversal.description().maxDepth(1).breadthFirst();
        System.out.println("traversalDescription = " + traversalDescription);
        final Traverser traverser = traversalDescription.traverse(rel.getStartNode());
        final Iterable<Node> nodes = traverser.nodes();
        Assert.assertEquals(rel.getEndNode(), nodes.iterator().next());
    }

}
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                .order(Traversal.postorderBreadthFirst())
                .evaluator(Evaluators.toDepth(MAXIMUM_DEPTH))
                .evaluator(calculateRatingPredicate)
                .relationships(DynamicRelationshipType.withName("friends"));
        final Traverser traverser = traversalDescription.traverse(userNode);
        final Iterator<Node> it = traverser.nodes().iterator();
        while (it.hasNext()) {
            it.next();
        }
        return calculateRatingPredicate.getRecommendedRestaurants(n);
    }
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    @Test
    public void nodesIteratorReturnAllNodes() throws Exception
    {
        Traverser traverser = Traversal.description().traverse( referenceNode() );
        int count = 0;
        for ( Node node : traverser.nodes() )
        {
            assertNotNull( "returned nodes should not be null. node #"
                           + count, node );
            count++;
        }
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