An ORM / OGM for the Tinkerpop graph stack.
Discussion at https://groups.google.com/forum/#!forum/totorom
This project has been created as an alternative to the Tinkerpop Frames project. If you like Gremlin and you like Java then you will like this!
<dependency>
<groupId>org.jglue.totorom</groupId>
<artifactId>totorom-tinkerpop2</artifactId>
<version>0.5.1</version>
</dependency>
It's just a way to give typed context to your gremlin queries:
public class Person extends FramedVertex {
public String getName() {
return getProperty("name");
}
public void setName(String name) {
setProperty("name", name); //Properties are simple method calls
}
public List<Knows> getKnowsList() {
return outE("knows").toList(Knows.class); //Gremlin natively supported
}
public List<Person> getFriendsOfFriends() {
return out("knows").out("knows").except(this).toList(Person.class); //Gremlin natively supported
}
public Knows addKnows(Person friend) {
return addEdge("knows", friend, Knows.class); //Elements are automatically unwrapped
}
}
public class Knows extends FramedEdge {
public void setYears(int years) {
setProperty("years", years);
}
public int getYears() {
return getProperty("years");
}
}
public class Programmer extends Person {
}
And here is how you interact with the framed elements:
public void testBasic() {
Graph g = new TinkerGraph();
FramedGraph fg = new FramedGraph(g);
Person p1 = fg.addVertex(Person.class);
p1.setName("Bryn");
Person p2 = fg.addVertex(Person.class);
p2.setName("Julia");
Knows knows = p1.addKnows(p2);
knows.setYears(15);
Person bryn = fg.V().has("name", "Bryn").next(Person.class);
Assert.assertEquals("Bryn", bryn.getName());
Assert.assertEquals(15, bryn.getKnowsList().get(0).getYears());
}
Using TypeResolver.Java will save the type of Java class the element was created with for use later:
public void testJavaTyping() {
Graph g = new TinkerGraph();
FramedGraph fg = new FramedGraph(g, FrameFactory.Default, TypeResolver.Java);//Java type resolver
//Also note FrameFactory.Default. Other options are CDI and Spring.
Person p1 = fg.addVertex(Programmer.class);
p1.setName("Bryn");
Person p2 = fg.addVertex(Person.class);
p2.setName("Julia");
Person bryn = fg.V().has("name", "Bryn").next(Person.class);
Person julia = fg.V().has("name", "Julia").next(Person.class);
Assert.assertEquals(Programmer.class, bryn.getClass());
Assert.assertEquals(Person.class, julia.getClass());
}
Here's a nice blog post talking about Totorom
This project uses code derived from the Tinkerpop project under the apache licence and or tinkerpop licence.