com.graphhopper.storage.index

Class QueryResult

java.lang.Object

com.graphhopper.storage.index.QueryResult

public class QueryResult
extends Object

Result of LocationIndex lookup.

 X=query coordinates S=snapped coordinates: "snapping" real coords to road N=tower or pillar
 node T=closest tower node XS=distance
 X
 |
 T--S----N
 

Author:

Peter Karich

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	QueryResult.Position Whether the query point is projected onto a tower node, pillar node or somewhere within the closest edge.

Field Summary

Fields

Modifier and Type	Field and Description
static int	INVALID_NODE

Constructor Summary

Constructors

Constructor and Description
QueryResult(double queryLat, double queryLon)

Method Summary

Modifier and Type	Method and Description
void	calcSnappedPoint(DistanceCalc distCalc) Calculates the closet point on the edge from the query point.
EdgeIteratorState	getClosestEdge()
int	getClosestNode() Returns the closest matching node.
double	getQueryDistance()
GHPoint	getQueryPoint()
GHPoint3D	getSnappedPoint() Calculates the position of the query point 'snapped' to a close road segment or node.
QueryResult.Position	getSnappedPosition()
int	getWayIndex() References to a tower node or the index of wayGeometry of the closest edge.
boolean	isValid()
void	setClosestEdge(EdgeIteratorState detach)
void	setClosestNode(int node)
void	setQueryDistance(double dist)
void	setSnappedPosition(QueryResult.Position pos)
void	setWayIndex(int wayIndex)
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

INVALID_NODE

public static final int INVALID_NODE

See Also:

Constant Field Values

Constructor Detail

QueryResult

public QueryResult(double queryLat,
                   double queryLon)

Method Detail

getClosestNode

public int getClosestNode()

Returns the closest matching node. This is either a tower node of the base graph or a virtual node (see also QueryGraph.create(Graph, List)).

Returns:

INVALID_NODE if nothing found, this should be avoided via a call of 'isValid'

setClosestNode

public void setClosestNode(int node)

getQueryDistance

public double getQueryDistance()

Returns:

the distance of the query to the snapped coordinates. In meter

setQueryDistance

public void setQueryDistance(double dist)

getWayIndex

public int getWayIndex()

References to a tower node or the index of wayGeometry of the closest edge. If wayGeometry has length L then the wayIndex 0 refers to the *base* node, 1 to L (inclusive) refer to the wayGeometry indices (minus one) and L+1 to the *adjacent* node. Currently only initialized if returned from Location2NodesNtree.

setWayIndex

public void setWayIndex(int wayIndex)

getSnappedPosition

public QueryResult.Position getSnappedPosition()

Returns:

0 if on edge. 1 if on pillar node and 2 if on tower node.

setSnappedPosition

public void setSnappedPosition(QueryResult.Position pos)

isValid

public boolean isValid()

Returns:

true if a close node was found

getClosestEdge

public EdgeIteratorState getClosestEdge()

Returns:

the closest matching edge. Will be null if nothing found or call isValid before

setClosestEdge

public void setClosestEdge(EdgeIteratorState detach)

getQueryPoint

public GHPoint getQueryPoint()

getSnappedPoint

public GHPoint3D getSnappedPoint()

Calculates the position of the query point 'snapped' to a close road segment or node. Call calcSnappedPoint before, if not, an IllegalStateException is thrown.

calcSnappedPoint

public void calcSnappedPoint(DistanceCalc distCalc)

Calculates the closet point on the edge from the query point.

toString

public String toString()

Overrides:

toString in class Object