org.shapelogic.polygon
Class PolygonEndPointAdjuster

java.lang.Object
  org.shapelogic.polygon.PolygonEndPointAdjuster

All Implemented Interfaces:

Calc<Polygon>, LazyCalc<Polygon>, Improver<Polygon>

public class PolygonEndPointAdjuster
extends java.lang.Object
implements Improver<Polygon>

Take a polygon as input and a list of sets of point that potentially can be combined. Create a new polygon. I think that if there have been no changes then just return the original polygon. I think that polygons are supposed to be immutable.

Author:

Sami Badawi

Field Summary

protected Polygon	_calcValue
protected java.util.Map<IPoint2D,IPoint2D>	_clusterPointToCommonPointMapping
protected java.util.Map<java.util.Set<IPoint2D>,IPoint2D>	_clustersToPointMapping
protected boolean	_createdNewVersion
protected boolean	_dirty
protected java.util.List<java.util.Set<IPoint2D>>	_endPointsMultiClusters
protected Polygon	_inputPolygon

Constructor Summary

PolygonEndPointAdjuster()

PolygonEndPointAdjuster(Polygon inputPolygon)

Method Summary

boolean	adjustmentPointOkForLine(CLine line, IPoint2D newPoint)
Polygon	calc()
boolean	createdNewVersion()
static IPoint2D	extendLine(CLine line, IPoint2D clusterPoint)
Polygon	getCalcValue() If dirty do calc() else return cached value.
java.util.List<java.util.Set<IPoint2D>>	getEndPointsMultiClusters()
Polygon	getInput()
boolean	isDirty()
void	setInput(Polygon input)
void	setup()
static boolean	startPointIsClosest(CLine line, IPoint2D clusterPoint)
protected IPoint2D	testCluster(java.util.Set<IPoint2D> cluster) If all the points in a cluster can be combined to a single point

Methods inherited from class java.lang.Object

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

Field Detail

_inputPolygon

protected Polygon _inputPolygon

_calcValue

protected Polygon _calcValue

_dirty

protected boolean _dirty

_endPointsMultiClusters

protected java.util.List<java.util.Set<IPoint2D>> _endPointsMultiClusters

_clustersToPointMapping

protected java.util.Map<java.util.Set<IPoint2D>,IPoint2D> _clustersToPointMapping

_clusterPointToCommonPointMapping

protected java.util.Map<IPoint2D,IPoint2D> _clusterPointToCommonPointMapping

_createdNewVersion

protected boolean _createdNewVersion

Constructor Detail

PolygonEndPointAdjuster

public PolygonEndPointAdjuster()

PolygonEndPointAdjuster

public PolygonEndPointAdjuster(Polygon inputPolygon)

Method Detail

getInput

public Polygon getInput()

Specified by:

getInput in interface Improver<Polygon>

isDirty

public boolean isDirty()

Specified by:

isDirty in interface LazyCalc<Polygon>

setup

public void setup()

Specified by:

setup in interface LazyCalc<Polygon>

calc

public Polygon calc()

Specified by:

calc in interface Calc<Polygon>

getCalcValue

public Polygon getCalcValue()

Description copied from interface: Calc

If dirty do calc() else return cached value. This should maybe be moved up in the hierarchy

Specified by:

getCalcValue in interface Calc<Polygon>

testCluster

protected IPoint2D testCluster(java.util.Set<IPoint2D> cluster)

If all the points in a cluster can be combined to a single point

Returns:

the point if it is possible otherwise null This class has very strict criteria for joining points. Only join if all lines are either very small or straight, and the new point keep all the straight lines straight. This might be relaxed in subclasses, by overriding this method

startPointIsClosest

public static boolean startPointIsClosest(CLine line,
                                          IPoint2D clusterPoint)

extendLine

public static IPoint2D extendLine(CLine line,
                                  IPoint2D clusterPoint)

adjustmentPointOkForLine

public boolean adjustmentPointOkForLine(CLine line,
                                        IPoint2D newPoint)

getEndPointsMultiClusters

public java.util.List<java.util.Set<IPoint2D>> getEndPointsMultiClusters()

createdNewVersion

public boolean createdNewVersion()

Specified by:

createdNewVersion in interface Improver<Polygon>

setInput

public void setInput(Polygon input)

Specified by:

setInput in interface Improver<Polygon>