2010/9/28 Joshi Hemant - hjoshi <hemant.jo...@acxiom.com>
> On second thought, you could use the new traversal framework as well. I
> haven't used all the features but it should be possible to do something
> like:
> TraversalDescription td =
> Traversal.description().breadthFirst().relationships(
> relation_1, Direction.OUTGOING ).relationships(
> relation_2, Direction.OUTGOING).filter(
> Traversal.returnAllButStartNode() );
>
> I think it will do relation_1 nodes first and then traverse to
> relation_2 nodes from those in a breadth_first manner.
> -Hemant
>
That traverser will traverse both relation_1 and relation_2 on all levels,
wherever it is. This kind of functionality is planned for the next iteration
of the traversal framework. One not-so-funny-solution would be to do this
manually with Node#getRelationships manually and use different types for
each level.
Node start = ...;
for ( Relationship relL1 : start.getRelationships( relation_1 ) ) {
Node nodeL1 = relL1.getOtherNode( start );
for ( Relationship relL2 : nodeL1.getRelationships( relation_2 ) ) {
Node nodeL2 = relL2.getOtherNode( nodeL1 );
.....
}
}
>
> -----Original Message-----
> From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org]
> On Behalf Of Joshi Hemant - hjoshi
> Sent: Tuesday, September 28, 2010 9:42 AM
> To: Neo4j user discussions
> Subject: Re: [Neo4j] traversing-functionality
>
> Have you looked at PatternMatch functionality? Take a look at
> http://components.neo4j.org/neo4j-graph-matching/
> IMO, you can define a pattern for relation_1 and from what you get as
> pattern nodes in relation_1, define relation_2 for them.
>
> Only thing you will need to know is where to look for such a pattern in
> the graph (i.e. start node). If you do not know the start node and want
> to want generic pattern, scan over entire graph using (Node n :
> graphDb.getAllNodes()) and repeat PatternMatch with each node as a
> starting point.
>
> -Hemant
>
> -----Original Message-----
> From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org]
> On Behalf Of Konstanze.Lorenz
> Sent: Tuesday, September 28, 2010 8:36 AM
> To: user@lists.neo4j.org
> Subject: [Neo4j] traversing-functionality
>
> Hi,
> For the project I'm working on, I need a traversing as follows:
> the relationships, which are put in for the traversing should not be
> attended at the same depth.
> That means: At first I want to get all nodes by traversing relation_1
> and then on this sample space I want to get all nodes by traversing
> relation_2.
> BUT:
> Traversal.description.expand(Traversal.expanderForTypes(Relation_1,Direc
> tion.Outgoing, Relation_2,Direction.Outgoing)
> traverses over all nodes with relation_1 and relation_2.
>
> By now, I didn't find this functionality implemented - has someone a
> hint where I can get it (if already existent) or an idea how to
> implement it in a reasonable way?
>
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--
Mattias Persson, [matt...@neotechnology.com]
Hacker, Neo Technology
www.neotechnology.com
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