Package org.apache.sis.internal.feature.j2d

Class Polyline.Iter

java.lang.Object

org.apache.sis.internal.feature.j2d.Polyline.Iter

All Implemented Interfaces:

PathIterator

Enclosing class:

Polyline

static final class Polyline.Iter
extends Object
implements PathIterator

Iterator over polyline(s) or polygon(s) coordinates. This implementation requires that all Polyline instances have non-empty coordinates array, otherwise ArrayIndexOutOfBoundsException will occur.

Field Summary

Fields

Modifier and Type	Field	Description
private boolean	closing	true if currentSegment(double[]) shall return PathIterator.SEG_CLOSE.
private float[]	coordinates	Coordinates to return (after conversion by inflate) in calls to currentSegment(double[]).
private AffineTransform	inflate	The transform to apply on each coordinate tuple.
private boolean	isDone	Whether iteration is finished.
private boolean	isPolygon	Whether current coordinates make a polygon.
private final Iterator<Polyline>	polylines	Next polylines on which to iterate, or an empty iterator if none.
private int	position	Current position in coordinates array.
private final AffineTransform	toUserSpace	The user-specified transform, or null if none.

Fields inherited from interface java.awt.geom.PathIterator

SEG_CLOSE, SEG_CUBICTO, SEG_LINETO, SEG_MOVETO, SEG_QUADTO, WIND_EVEN_ODD, WIND_NON_ZERO

Constructor Summary

Constructors

Constructor	Description
Iter()	Creates an empty iterator.
Iter(AffineTransform at, Polyline first, Iterator<Polyline> next)	Creates a new iterator.

Method Summary

Modifier and Type	Method	Description
int	currentSegment(double[] coords)	Returns coordinates of current line segment.
int	currentSegment(float[] coords)	Returns coordinates of current line segment.
int	getWindingRule()	Arbitrary winding rule, since enclosing class do not yet compute shape interior.
boolean	isDone()	Returns true if there are no more points to iterate.
void	next()	Moves to the next point.
private void	setSource(Polyline polyline)	Initializes the coordinates, isPolygon and inflate fields for iteration over coordinate values given by the specified polyline.

Methods inherited from class java.lang.Object

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

Field Details

toUserSpace

private final AffineTransform toUserSpace

The user-specified transform, or null if none.

inflate

private AffineTransform inflate

The transform to apply on each coordinate tuple. This is the concatenation of user-specified transform with Polyline.inflate. Shall not be null, unless the iterator is empty.

polylines

private final Iterator<Polyline> polylines

Next polylines on which to iterate, or an empty iterator if none.

coordinates

private float[] coordinates

Coordinates to return (after conversion by inflate) in calls to currentSegment(double[]).

position

private int position

Current position in coordinates array.

closing

private boolean closing

true if currentSegment(double[]) shall return PathIterator.SEG_CLOSE.

isPolygon

private boolean isPolygon

Whether current coordinates make a polygon. If true, then iteration shall emit a closing PathIterator.SEG_CLOSE type before to move to next polyline or polygon.

isDone

private boolean isDone

Whether iteration is finished.

Constructor Details

Iter

Iter()

Creates an empty iterator.

Iter

Iter(AffineTransform at,
 Polyline first,
 Iterator<Polyline> next)

Creates a new iterator.

Parameters:

at - the transform to apply on each coordinate tuple.

first - the first polyline or polygon.

next - all other polylines or polygons.

Method Details

setSource

private void setSource(Polyline polyline)

Initializes the coordinates, isPolygon and inflate fields for iteration over coordinate values given by the specified polyline.

getWindingRule

public int getWindingRule()

Arbitrary winding rule, since enclosing class do not yet compute shape interior.

Specified by:

getWindingRule in interface PathIterator

isDone

public boolean isDone()

Returns true if there are no more points to iterate.

Specified by:

isDone in interface PathIterator

next

public void next()

Moves to the next point.

Specified by:

next in interface PathIterator

currentSegment

public int currentSegment(float[] coords)

Returns coordinates of current line segment.

Specified by:

currentSegment in interface PathIterator

currentSegment

public int currentSegment(double[] coords)

Returns coordinates of current line segment.

Specified by:

currentSegment in interface PathIterator