graph - Java GraphTraversal 输出 Gremlin 查询

Question

如何从 Java GraphTraversal 对象输出 Gremlin 查询？默认输出 (graphTraversal.toString()) 看起来像 [HasStep([~label.eq(brand), name.eq(Nike), status.within([VALID])] )] 不易阅读。

Answer 1

Gremlin 提供了 GroovyTranslator 类来帮助实现这一点。这是一个例子。

// Simple traversal we can use for testing a few things
Traversal t = 
  g.V().has("airport","region","US-TX").
        local(values("code","city").
        fold());


// Generate the text form of the query from a Traversal
String query;
query = GroovyTranslator.of("g").
        translate(t.asAdmin().getBytecode());

System.out.println("\nResults from GroovyTranslator on a traversal");
System.out.println(query);

这取自此处的一组示例:https://github.com/krlawrence/graph/blob/master/sample-code/RemoteWriteText.java