package org.neo4j.graphalgo.impl.util;
import java.util.Iterator;
import org.neo4j.graphalgo.CostEvaluator;
import org.neo4j.graphalgo.WeightedPath;
import org.neo4j.graphdb.Direction;
import org.neo4j.graphdb.Node;
import org.neo4j.graphdb.Path;
import org.neo4j.graphdb.PropertyContainer;
import org.neo4j.graphdb.Relationship;
public class WeightedPathImpl implements WeightedPath
{
private final Path path;
private final double weight;
public WeightedPathImpl( CostEvaluator<Double> costEvaluator, Path path )
{
this.path = path;
double cost = 0;
for ( Relationship relationship : path.relationships() )
{
cost += costEvaluator.getCost( relationship, Direction.OUTGOING );
}
this.weight = cost;
}
public WeightedPathImpl( double weight, Path path )
{
this.path = path;
this.weight = weight;
}
public double weight()
{
return weight;
}
public Node startNode()
{
return path.startNode();
}
public Node endNode()
{
return path.endNode();
}
public Relationship lastRelationship()
{
return path.lastRelationship();
}
public int length()
{
return path.length();
}
public Iterable<Node> nodes()
{
return path.nodes();
}
public Iterable<Relationship> relationships()
{
return path.relationships();
}
@Override
public String toString()
{
return path.toString() + " weight:" + this.weight;
}
public Iterator<PropertyContainer> iterator()
{
return path.iterator();
}
}