Package org.locationtech.jts.geomgraph

Class Node

java.lang.Object

org.locationtech.jts.geomgraph.GraphComponent

org.locationtech.jts.geomgraph.Node

Direct Known Subclasses:

RelateNode

public class Node
extends GraphComponent

Version:

1.7

Constructor Summary

Constructors

Constructor	Description
Node(Coordinate coord, EdgeEndStar edges)

Method Summary

Modifier and Type	Method	Description
void	add(EdgeEnd e)	Add the edge to the list of edges at this node.
Coordinate	getCoordinate()
EdgeEndStar	getEdges()
boolean	isIncidentEdgeInResult()	Tests whether any incident edge is flagged as being in the result.
boolean	isIsolated()	An isolated component is one that does not intersect or touch any other component.
void	mergeLabel(Label label2)	To merge labels for two nodes, the merged location for each LabelElement is computed.
void	mergeLabel(Node n)
void	print(java.io.PrintStream out)
void	setLabel(int argIndex, int onLocation)
void	setLabelBoundary(int argIndex)	Updates the label of a node to BOUNDARY, obeying the mod-2 boundaryDetermination rule.

Methods inherited from class org.locationtech.jts.geomgraph.GraphComponent

getLabel, isCovered, isCoveredSet, isInResult, isVisited, setCovered, setInResult, setLabel, setVisited, updateIM

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Node

public Node(Coordinate coord,
            EdgeEndStar edges)

Method Detail

getCoordinate

public Coordinate getCoordinate()

Specified by:

getCoordinate in class GraphComponent

Returns:

a coordinate in this component (or null, if there are none)

getEdges

public EdgeEndStar getEdges()

isIncidentEdgeInResult

public boolean isIncidentEdgeInResult()

Tests whether any incident edge is flagged as being in the result. This test can be used to determine if the node is in the result, since if any incident edge is in the result, the node must be in the result as well.

Returns:

true if any incident edge in the in the result

isIsolated

public boolean isIsolated()

Description copied from class: GraphComponent

An isolated component is one that does not intersect or touch any other component. This is the case if the label has valid locations for only a single Geometry.

Specified by:

isIsolated in class GraphComponent

Returns:

true if this component is isolated

add

public void add(EdgeEnd e)

Add the edge to the list of edges at this node.

Parameters:

e - EdgeEnd

mergeLabel

public void mergeLabel(Node n)

mergeLabel

public void mergeLabel(Label label2)

To merge labels for two nodes, the merged location for each LabelElement is computed. The location for the corresponding node LabelElement is set to the result, as long as the location is non-null.

Parameters:

label2 - Label to merge

setLabel

public void setLabel(int argIndex,
                     int onLocation)

setLabelBoundary

public void setLabelBoundary(int argIndex)

Updates the label of a node to BOUNDARY, obeying the mod-2 boundaryDetermination rule.

Parameters:

argIndex - location index

print

public void print(java.io.PrintStream out)