Hello everybody, A related question is can I index both Nodes & Relations? As I can see LuceneIndexBatchInserter.index( long node, String key, Object value ) applies for Nodes only.
2010/1/28 Mattias Persson <matt...@neotechnology.com> > Not at all, you're not the first one to overlook that inheritance! > > 2010/1/28, Anton Popov <popov.ua.w...@gmail.com>: > > Thanks for a quick answer, Mattias. > > > > Sorry for a stupid questions, just haven't noticed the inheritance of > > Relationship interface. > > > > On 28 January 2010 19:43, Mattias Persson <matt...@neotechnology.com> > wrote: > > > >> Relationship has all the property methods, just like Node... they're > >> actually on PropertyContainer (a common super interface to Node and > >> Relationship) see > >> http://api.neo4j.org/current/org/neo4j/graphdb/Relationship.html and > >> http://api.neo4j.org/current/org/neo4j/graphdb/PropertyContainer.html > >> for more information. > >> > >> So to manage the cost in a dijkstra algorithm you can use whatever > >> property key, f.ex. "weight", like this: > >> > >> Relationship rel = ... // any relationship > >> rel.setProperty( "weight", 4 ); > >> > >> And if you're using the Dijkstra algorithms in the "neo4j-graph-algo" > >> component, http://components.neo4j.org/neo4j-graph-algo/ , you can > >> instantiate it with a CostEvaluator instance something like this: > >> > >> new CostEvaluator<Integer>() > >> { > >> CostType getCost( Relationship relationship, boolean backwards ) > >> { > >> / TODO Handle backwards flag? > >> return ( Integer ) relationship.getProperty( "weight", 1 ); > >> } > >> } > >> > >> ...and pass it to your Dijkstra algo instance. > >> > >> Is this what you were looking for? > >> > >> 2010/1/28 Anton Popov <popov.ua.w...@gmail.com>: > >> > Hello everyone, > >> > > >> > Is there any possibility to assign properties to Relations? > >> > The matter is I want to try Dijkstra algorithm performance on some > >> weighted > >> > directed graph and don't know where to put weight actually... > >> > > >> > -- > >> > Best regards, > >> > Popov Anton > >> > _______________________________________________ > >> > Neo mailing list > >> > User@lists.neo4j.org > >> > https://lists.neo4j.org/mailman/listinfo/user > >> > > >> > >> > >> > >> -- > >> Mattias Persson, [matt...@neotechnology.com] > >> Neo Technology, www.neotechnology.com > >> _______________________________________________ > >> Neo mailing list > >> User@lists.neo4j.org > >> https://lists.neo4j.org/mailman/listinfo/user > >> > > > > > > > > -- > > Best regards, > > Popov Anton > > _______________________________________________ > > Neo mailing list > > User@lists.neo4j.org > > https://lists.neo4j.org/mailman/listinfo/user > > > > > -- > Mattias Persson, [matt...@neotechnology.com] > Neo Technology, www.neotechnology.com > _______________________________________________ > Neo mailing list > User@lists.neo4j.org > https://lists.neo4j.org/mailman/listinfo/user > -- Best regards, Popov Anton _______________________________________________ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
