Imho it would have to iterate as well. As the type is stored with the relationship record and so can only be accessed after having read it.
It might be to have some minimal performance improvements that relationships would not have to be fully loaded, nor put into the cache for that. But this is always a question of the use-case. What will be done next with those rel-types. What was the use-case for this operation again? Cheers Michael Am 31.07.2011 um 18:59 schrieb Niels Hoogeveen: > > Good point. > It could for all practical purposes even be Iterable<RelationshipType> so > they can be lazily fetched, as long as the underlying implementation makes > certain that any iteration of the RelationshipTypes forms a set (no > duplicates). > There is no need to have RelationshipTypes in any particular order, and if > that is needed in the application, they can usually be sorted locally since > Nodes will generally have associated Relationships of only a handful of > RelationshipTypes. > > That said, the more important question is, if the Neo4j store can produce > this meta-information. For sparsely connected nodes, it is possible to > iterate over the relationships and return the set of RelationshipTypes, but > this is not a proper solution when nodes are densely connected. So there is > no general solution for this question yet. > Niels > >> From: j...@neotechnology.com >> Date: Sun, 31 Jul 2011 17:29:29 +0100 >> To: user@lists.neo4j.org >> Subject: Re: [Neo4j] Node#getRelationshipTypes >> >> Hi Niels, >> >> Ignoring the operational use for getting relationship types, I do think >> these should be generalised from: >> >>> RelationshipType[] getRelationshipTypes(); >>> RelationshipType[] getRelationshipTypes(Direction); >> >> to: >> >> Set<RelationshipType> getRelationshipTypes(); >> Set<RelationshipType> getgetRelationshipTypes(Direction); >> >> Unless you need the ordering and you think the overhead of creating a some >> kind of Set is too onerous from a performance point of view. >> >> Jim >> _______________________________________________ >> Neo4j mailing list >> User@lists.neo4j.org >> https://lists.neo4j.org/mailman/listinfo/user > > _______________________________________________ > Neo4j mailing list > User@lists.neo4j.org > https://lists.neo4j.org/mailman/listinfo/user _______________________________________________ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
