com.vividsolutions.jts.geomgraph
Class GraphComponent

java.lang.Object
  com.vividsolutions.jts.geomgraph.GraphComponent

Direct Known Subclasses:

Edge, Node

public abstract class GraphComponent
extends java.lang.Object

A GraphComponent is the parent class for the objects' that form a graph. Each GraphComponent can carry a Label.

Version:

1.7

Field Summary

protected Label

label

Constructor Summary

GraphComponent()

GraphComponent(Label label)

Method Summary

protected abstract void	computeIM(IntersectionMatrix im) compute the contribution to an IM for this component
abstract Coordinate	getCoordinate()
Label	getLabel()
boolean	isCovered()
boolean	isCoveredSet()
boolean	isInResult()
abstract boolean	isIsolated() An isolated component is one that does not intersect or touch any other component.
boolean	isVisited()
void	setCovered(boolean isCovered)
void	setInResult(boolean isInResult)
void	setLabel(Label label)
void	setVisited(boolean isVisited)
void	updateIM(IntersectionMatrix im) Update the IM with the contribution for this component.

Methods inherited from class java.lang.Object

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

Field Detail

label

protected Label label

Constructor Detail

GraphComponent

public GraphComponent()

GraphComponent

public GraphComponent(Label label)

Method Detail

getLabel

public Label getLabel()

setLabel

public void setLabel(Label label)

setInResult

public void setInResult(boolean isInResult)

isInResult

public boolean isInResult()

setCovered

public void setCovered(boolean isCovered)

isCovered

public boolean isCovered()

isCoveredSet

public boolean isCoveredSet()

isVisited

public boolean isVisited()

setVisited

public void setVisited(boolean isVisited)

getCoordinate

public abstract Coordinate getCoordinate()

Returns:

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

computeIM

protected abstract void computeIM(IntersectionMatrix im)

compute the contribution to an IM for this component

isIsolated

public abstract boolean isIsolated()

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.

Returns:

true if this component is isolated

updateIM

public void updateIM(IntersectionMatrix im)

Update the IM with the contribution for this component. A component only contributes if it has a labelling for both parent geometries