[TINKERPOP-1036] Support self-looping edges in IO

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.1.0-incubating
• Fix Version/s: 3.1.1-incubating
• Component/s: io
• Assignee: Stephen Mallette
• Reporter: Stephen Mallette
• Created: 09/Dec/15 22:35
• Updated: 12/Jan/16 21:48
• Resolved: 12/Jan/16 21:13

Description

Seems like GraphSON is having trouble with self-loops. Not sure about other IO at this time.

gremlin> a = TinkerGraph.open()
==>tinkergraph[vertices:0 edges:0]
gremlin> v1 = a.addVertex()
==>v[0]
gremlin> v2 = a.addVertex()
==>v[1]
gremlin> control = v1.addEdge("CONTROL", v2)
==>e[2][0-CONTROL->1]
gremlin> selfLoop = v1.addEdge("SELF-LOOP", v1)
==>e[3][0-SELF-LOOP->0]
gremlin> a.io(IoCore.graphson()).writeGraph("test.gson")
==>null
gremlin> b = TinkerGraph.open()
==>tinkergraph[vertices:0 edges:0]
gremlin> b.io(IoCore.graphson()).readGraph("test.gson")
==>null
gremlin> b.traversal().E()
==>e[2][0-CONTROL->1]

with graphson of:

{"id":0,"label":"vertex","inE":{"SELF-LOOP":[{"id":3,"outV":0}]},"outE":{"CONTROL":[{"id":2,"inV":1}]}}
{"id":1,"label":"vertex","inE":{"CONTROL":[{"id":2,"outV":0}]}}