gistfile1.java

//////////////////////////////////
///////// BLUEPRINTS ////////////
/////////////////////////////////

public interface Graph {
   public <S, A extends Flow<A, S, Vertex>> A V();
   ...
}

public interface Flow<A extends Flow, S, E> {
    public A has(String key, Object value);
    public A out();
    public A value(String key);
}

public class GremlinFlow<S, E> implements Flow<GremlinFlow, S, E> {
    public GremlinFlow has(String key, Object value) {
        return this;
    }
    public GremlinFlow out() {
        return this;
    }
    public GremlinFlow value(String key) {
        return this;
    }
}

//////////////////////////////////
///////// TINKERGRAPH ////////////
//////////////////////////////////

public class TinkerGraph {
    public <S, A extends Flow<A, S, Vertex>> A V() {
        return (A) new GremlinFlow<S, Vertex>();
    }
    ...
}

/// EXAMPLE TEST -- RETURNS NOTHING, BUT DEMONSTRATES THE FUNCTION CHAINING OFF g.V()

@Test
public void shouldFlow() {
   Graph g = TinkerFactory.createClassic();
   g.V().has("name","marko").out();
}