Hi,
this is an example with graph database

OrientGraph g=new OrientGraph(currentPath);
OClass p=g.createVertexType("Person", "V");
p.createProperty("name", OType.STRING);
p.createProperty("lista", OType.LINKLIST);
OClass c=g.createVertexType("Contract", "V");
c.createProperty("name", OType.STRING);
OrientVertex v2=g.addVertex("class:Contract");
v2.setProperties("name","contratto 1");
OrientVertex v1=g.addVertex("class:Person");
v1.setProperties("name","alessandro");

List<OIdentifiable> linklist = new ArrayList<OIdentifiable>();
linklist.add(v2);
v1.setProperties("lista",linklist);
g.shutdown();

I hope I have helped you

Alessandro

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