Dear ,
I am trying find the shortest path between two nodes .
I am getting two shortest paths .But my requirement is internally it should
filter based on one of the nodes property value . it should return relevant
path based on node property value.
I added Node filter to the PathExpanderBuilder .but as it is traversing
through the whole path at some node, it is giving false as the getP1()
method is giving false and finally it is not returning any paths.
can some body help?
public Iterable<Path> shortestPath(Node sourceNode, Node destNode)
{
Integer depth=10;
PathExpander<?> expander;
List<Path> paths = new ArrayList<>();
if ( orderedRelTypes == null )
{
expander = PathExpanders.allTypesAndDirections();
}
else
{
PathExpanderBuilder expanderBuilder = PathExpanderBuilder.empty();
expanderBuilder = expanderBuilder
.add(MyRelationshipTypes.IS_LOCATED_AT, Direction.BOTH)
.add(MyRelationshipTypes.BELONGS_TO, Direction.BOTH)
.add(MyRelationshipTypes.CARRIES, Direction.BOTH)
.addNodeFilter(getP1());
expander = expanderBuilder.build();
}
try (Transaction tx = Neo4JDBEngine.getGraphService().beginTx()) {
PathFinder<Path> shortestPath = GraphAlgoFactory.shortestPath(
expander, depth == null ? 4 : depth.intValue());
for (Path path : shortestPath.findAllPaths(sourceNode, destNode)) {
paths.add(path);
}
tx.success();
}
return paths;
}
public static Predicate<Node> getP1() {
return p -> "RFS".equals(p.getProperty("Type"));
}
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