How to use

addConnection

method

in

org.janusgraph.core.schema.JanusGraphManagement

private void createStrictSchemaForComplexConnections() {
  clopen(option(AUTO_TYPE), "none", option(SCHEMA_CONSTRAINTS), true);
  VertexLabel v1 = mgmt.makeVertexLabel("V1").make();
  VertexLabel v2 = mgmt.makeVertexLabel("V2").make();
  VertexLabel v3 = mgmt.makeVertexLabel("V3").make();
  VertexLabel v4 = mgmt.makeVertexLabel("V4").make();
  EdgeLabel e1 = mgmt.makeEdgeLabel("E1").make();
  EdgeLabel e2 = mgmt.makeEdgeLabel("E2").make();
  mgmt.addConnection(e1, v1, v2);
  mgmt.addConnection(e1, v3, v4);
  mgmt.addConnection(e2, v1, v4);
  mgmt.addConnection(e2, v3, v2);
  finishSchema();
}

private void createStrictSchemaForConnections() {
  clopen(option(AUTO_TYPE), "none", option(SCHEMA_CONSTRAINTS), true);
  VertexLabel user = mgmt.makeVertexLabel("user").make();
  VertexLabel company = mgmt.makeVertexLabel("company").make();
  EdgeLabel edge = mgmt.makeEdgeLabel("knows").make();
  mgmt.makeEdgeLabel("buys").make();
  mgmt.addConnection(edge, user, company);
  finishSchema();
}

private GraphTraversalSource prepareGraphForDirectCommitTests() {
  clopen(option(AUTO_TYPE), "none", option(SCHEMA_CONSTRAINTS), true);
  GraphTraversalSource g = graph.traversal();
  VertexLabel user = mgmt.makeVertexLabel("user").make();
  EdgeLabel edge = mgmt.makeEdgeLabel("knows").make();
  PropertyKey id = mgmt.makePropertyKey("id").cardinality(Cardinality.SINGLE).dataType(Integer.class).make();
  mgmt.addProperties(edge, id);
  mgmt.addConnection(edge, user, user);
  mgmt.commit();
  return g;
}

private void createStrictSchemaForEdgeProperties() {
  clopen(option(AUTO_TYPE), "none", option(SCHEMA_CONSTRAINTS), true);
  VertexLabel user = mgmt.makeVertexLabel("user").make();
  EdgeLabel edge = mgmt.makeEdgeLabel("knows").make();
  PropertyKey id = mgmt.makePropertyKey("id").cardinality(Cardinality.SINGLE).dataType(Integer.class).make();
  mgmt.makePropertyKey("test").cardinality(Cardinality.SINGLE).dataType(Integer.class).make();
  mgmt.addProperties(edge, id);
  mgmt.addConnection(edge, user, user);
  finishSchema();
}

@Test
public void testSupportChangeNameOfEdgeAndUpdateConnections() {
  clopen(option(AUTO_TYPE), "none", option(SCHEMA_CONSTRAINTS), true);
  VertexLabel user = mgmt.makeVertexLabel("V1").make();
  VertexLabel company = mgmt.makeVertexLabel("V2").make();
  EdgeLabel edge = mgmt.makeEdgeLabel("E1").make();
  mgmt.addConnection(edge, user, company);
  finishSchema();
  JanusGraphVertex v1 = tx.addVertex("V1");
  JanusGraphVertex v2 = tx.addVertex("V2");
  v1.addEdge("E1", v2);
  newTx();
  edge = mgmt.getEdgeLabel("E1");
  mgmt.changeName(edge, "E2");
  mgmt.commit();
  JanusGraphVertex v3 = tx.addVertex("V1");
  JanusGraphVertex v4 = tx.addVertex("V2");
  v3.addEdge("E2", v4);
}