com.revolsys.jts.geomgraph

Class GraphComponent

java.lang.Object

com.revolsys.jts.geomgraph.GraphComponent

Direct Known Subclasses:

Edge, Node

public abstract class GraphComponent
extends 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

Fields

Modifier and Type	Field and Description
protected Label	label

Constructor Summary

Constructors

Constructor and Description
GraphComponent()
GraphComponent(Label label)

Method Summary

Methods

Modifier and Type	Method and Description
protected abstract void	computeIM(IntersectionMatrix im) compute the contribution to an IM for this component
abstract Point	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

computeIM

protected abstract void computeIM(IntersectionMatrix im)

compute the contribution to an IM for this component

getCoordinate

public abstract Point getCoordinate()

Returns:

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

getLabel

public Label getLabel()

isCovered

public boolean isCovered()

isCoveredSet

public boolean isCoveredSet()

isInResult

public boolean isInResult()

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

isVisited

public boolean isVisited()

setCovered

public void setCovered(boolean isCovered)

setInResult

public void setInResult(boolean isInResult)

setLabel

public void setLabel(Label label)

setVisited

public void setVisited(boolean isVisited)

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