[TINKERPOP-3015] Use wildcard instead of Object for hasId predicates

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 3.5.7, 3.6.5
• Component/s: process
• Assignee: Unassigned
• Reporter: Christopher Smith
• Created: 10/Nov/23 19:41
• Updated: 22/Aug/24 20:57

Description

From both GraphTraversal and __, the hasId(P) steps specify a P<Object>. Common predicates, such as within, propagate the generic type from their own arguments, so that this produces a compile-time error:

Collection<String> ids = ...
g.V().hasId(P.within(ids))

I believe that without loss of safety, the signature in both locations could be changed to P<?>, making the typical case of "here's a collection of IDs of known type" work smoothly.