使用過濾器在遍歷的Neo4j

Question

如何，我可以添加過濾器來定遍歷：

TraversalDescription td = Traversal.description() 
       .breadthFirst() 
       .relationships(RelTypes.KNOWS) 
       .evaluator(Evaluators.excludeStartPosition()).evaluator(Evaluators.atDepth(1)) 

，只有擁有財產Name == John節點將在結果？

Answer 1

Evaluator e = new Evaluator() { 

      @Override 
      public Evaluation evaluate(Path arg0) { 
       // TODO Auto-generated method stub 
       if(arg0.endNode().getProperty("Name").equals("John")){ 
        return Evaluation.INCLUDE_AND_CONTINUE; 
       }else{ 
        return Evaluation.EXCLUDE_AND_CONTINUE; 
       } 
      } 
     }; 

     TraversalDescription td = Traversal.description() 
       .breadthFirst() 
       .relationships(RelTypes.KNOWS) 
       .evaluator(Evaluators.excludeStartPosition()).evaluator(Evaluators.atDepth(1)).evaluator(e); 

     return td.traverse(a);