You'd have to do the filtering/pruning in an evaluator, but the
sub-pathing afterwards, like:
for ( Path path : description.traverse(...) )
{
path = subPath( path, 2 );
}
private Path subPath( Path source, int from )
{
if ( source.length() < from )
throw new IllegalArgumentException( source + " isn't long
enough (" + from + ")" );
Iterator<Node> nodes = source.nodes().iterator();
Iterator<Relationship> relationships =
source.relationships().iterator();
for ( int i = 0; i < from; i++ )
{
nodes.next();
relationships.next();
}
PathImpl.Builder builder = new PathImpl.Builder( nodes.next() );
while ( relationships.hasNext() )
{
builder = builder.push( relationships.next() );
}
return builder.build();
}
Such a method should preferably be added to the Path interface,
Path#subPath or similar and it would be implemented much better also
:)
2011/4/7 Brendan Cheng <ccp...@gmail.com>:
> Hi,
>
> I would like to fetch a ending portion of a path where the timestamp
> of the relationship match. for example:
>
> (Node 1)---<2pm>---->(Node 3)---<3PM>--->(Node 4)----<4PM>--->(Node 64)
>
> from the above , I only want the subpath starting from Node 4 onward
> for the timestamp greater than 3:30PM
>
>
> How could I code evaluator to do it?
>
> Thanks in advance,
>
> Brendan
> _______________________________________________
> Neo4j mailing list
> User@lists.neo4j.org
> https://lists.neo4j.org/mailman/listinfo/user
>
--
Mattias Persson, [matt...@neotechnology.com]
Hacker, Neo Technology
www.neotechnology.com
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