neo4j: cypher vs core API

gistfile1.java

cypher:

START researchArea = node:research_areas('research_area_id:1'), month = node:months('month:8'), year = node:years('year:2012')
MATCH researchArea-[:has_child*1..5]->otherResearchArea-[:has_product]->product-[:sold]->sales-[:soldInMonth]->month, sales-[:soldInYear]->year
RETURN DISTINCT(sales.sales), sales.name, product

core API:

        GraphDatabaseService db = new GraphDatabaseFactory().newEmbeddedDatabase("/path/to/db");

        Node researchArea = db.index().forNodes("research_areas").get("research_area_id", "1").getSingle();
        final Node month = db.index().forNodes("months").get("month", "8").getSingle();
        final Node year = db.index().forNodes("years").get("year", "2012").getSingle();


        final List<Map<String, Object>> rows = new ArrayList<Map<String, Object>>();

        Traversal.description()
                .depthFirst()
                .relationships(DynamicRelationshipType.withName("has_child"), Direction.OUTGOING)
                .evaluator(Evaluators.toDepth(5))
                .evaluator(new Evaluator() {
                    public Evaluation evaluate(Path path) {
                        Node subResearchArea = path.endNode();
                        for (Relationship researchAreaToProduct : subResearchArea.getRelationships(DynamicRelationshipType.withName("has_product"))) {
                            Node productNode = researchAreaToProduct.getEndNode();
                            for (Relationship productToSales : productNode.getRelationships(DynamicRelationshipType.withName("sold"))) {
                                Node salesNode = productToSales.getEndNode();

                                Iterable<Relationship> salesToMonths = salesNode.getRelationships(DynamicRelationshipType.withName("soldInMonth"));
                                Iterable<Relationship> salesToYears = salesNode.getRelationships(DynamicRelationshipType.withName("soldInYear"));

                                for (Relationship salesToMonth : salesToMonths) {
                                    for (Relationship salesToYear : salesToYears) {
                                        if (salesToMonth.getEndNode().equals(month) && salesToYear.getEndNode().equals(year)) {
                                            HashMap<String, Object> rowProperties = new HashMap<String, Object>();
                                            rowProperties.put("name", salesNode.getProperty("name"));
                                            rowProperties.put("sales", salesNode.getProperty("sales"));
                                            rowProperties.put("product", productNode.getProperty("product_id"));
                                            rows.add(rowProperties);
                                        }
                                    }
                                }
                            }
                        }


                        return Evaluation.INCLUDE_AND_CONTINUE;
                    }
                })
                .traverse(researchArea);