java - Gremlin Groovy ClassCastException with Frames -


i'm receiving following error while using @gremlingroovy annotation associated tinkerpop's frames.

java.lang.classcastexception: com.thinkaurelius.titan.graphdb.relations.cacheedge cannot cast com.tinkerpop.blueprints.vertex     @ com.tinkerpop.frames.structures.framedvertexiterable$1.next(framedvertexiterable.java:36)     @ com.tinkerpop.frames.annotations.gremlin.gremlingroovyannotationhandler.processvertex(gremlingroovyannotationhandler.java:75)     @ com.tinkerpop.frames.annotations.gremlin.gremlingroovyannotationhandler.processelement(gremlingroovyannotationhandler.java:114)     @ com.tinkerpop.frames.annotations.gremlin.gremlingroovyannotationhandler.processelement(gremlingroovyannotationhandler.java:30)     @ com.tinkerpop.frames.framedelement.invoke(framedelement.java:83)     @ com.sun.proxy.$proxy81.getproxycandidateedgefrompersonuuid(unknown source)     @ com.company.prod.domain.person$impl.toimpl(person.java:100)     ....

the following line causes error:

fooedge fe = foo.getfooedgefromuuid(this.getuuid());

which calling method:

@gremlingroovy("it.oute('has').filter{it.inv().has('uuid', t.eq, uuid).hasnext()}") fooedge getfooedgefromuuid(@gremlinparam("uuid") string uuid);

i've tried following traversal (which causes same error):

@gremlingroovy("it.out('has').has('uuid', t.eq, uuid).ine('has')")

however, when open gremlin shell test out same exact traversal - works out fine. thoughts on may causing issue?

this isn't of answer workaround. instead of using @gremlingroovy annotation 1 can use gremlin @javahandler annotation.

@javahandler void getfooedgefromuuid(string uuid);  abstract class impl implements javahandlercontext<vertex>, foo {     public fooedge getfooedgefromuuid(string uuid) {         return frameedges(                 gremlin().out("has")                         .has("person-uuid", tokens.t.eq, uuid)                         .ine("has"),                 fooedge.class).iterator().next();     } }

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