Package org.apache.sis.internal.feature.jts

Class ShapeConverter

java.lang.Object

org.apache.sis.internal.feature.jts.ShapeConverter

Direct Known Subclasses:

ShapeConverter.Double, ShapeConverter.Float

abstract class ShapeConverter
extends Object

Converts a Java2D Shape to a JTS Geometry. Two subclasses exist depending on whether the geometries will store coordinates as float or double floating point numbers.

Since:

1.2

Version:

1.2

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static final class	ShapeConverter.Double	A converter of Java2D Shape to a JTS Geometry storing coordinates as double values.
private static final class	ShapeConverter.Float	A converter of Java2D Shape to a JTS Geometry storing coordinates as float values.

Field Summary

Fields

Modifier and Type	Field	Description
private static final int	DIMENSION	Number of dimensions of geometries built by this class.
private final org.locationtech.jts.geom.GeometryFactory	factory	The JTS factory for creating geometry.
private final List<org.locationtech.jts.geom.Geometry>	geometries	All geometries that are component of a multi-geometries.
private int	geometryType	Bitmask combination of the type of all geometries built.
private static final int	INITIAL_CAPACITY	Initial number of coordinate values that the buffer can hold.
protected final PathIterator	iterator	Iterator over the coordinates of the Java2D shape to convert to a JTS geometry.
protected int	length	Number of values in the float[] or double[] array stored by sub-class.
private static final int	LINESTRING	Bit mask of the kind of geometric objects created.
private static final int	POINT	Bit mask of the kind of geometric objects created.
private static final int	POLYGON	Bit mask of the kind of geometric objects created.

Constructor Summary

Constructors

Constructor	Description
ShapeConverter(org.locationtech.jts.geom.GeometryFactory factory, PathIterator iterator, boolean isFloat)	Creates a new converter from Java2D shape to JTS geometry.

Method Summary

Modifier and Type	Method	Description
(package private) abstract void	addPoint()	Stores the single point obtained by the last call to currentSegment().
private org.locationtech.jts.geom.Geometry	build()	Iterates over all coordinates given by the iterator and stores them in a JTS geometry.
(package private) static org.locationtech.jts.geom.Geometry	create(org.locationtech.jts.geom.GeometryFactory factory, Shape shape, double flatness)	Converts a Java2D Shape to a JTS geometry.
(package private) abstract int	currentSegment()	Returns the coordinates and type of the current path segment in the iteration.
private void	flush(boolean isRing)	Copies current coordinates in a new JTS geometry, then resets length to 0 in preparation for the next geometry.
(package private) abstract PackedCoordinateSequence	toSequence(boolean close)	Returns a copy of current coordinate values as a JTS coordinate sequence.

Methods inherited from class java.lang.Object

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

Field Details

DIMENSION

private static final int DIMENSION

Number of dimensions of geometries built by this class.

See Also:

• Constant Field Values

INITIAL_CAPACITY

private static final int INITIAL_CAPACITY

Initial number of coordinate values that the buffer can hold. The buffer capacity will be expanded as needed.

See Also:

• Constant Field Values

POINT

private static final int POINT

Bit mask of the kind of geometric objects created. Used for detecting if all objects are of the same type.

See Also:

• geometryType
• Constant Field Values

LINESTRING

private static final int LINESTRING

Bit mask of the kind of geometric objects created. Used for detecting if all objects are of the same type.

See Also:

• geometryType
• Constant Field Values

POLYGON

private static final int POLYGON

Bit mask of the kind of geometric objects created. Used for detecting if all objects are of the same type.

See Also:

• geometryType
• Constant Field Values

geometries

private final List<org.locationtech.jts.geom.Geometry> geometries

All geometries that are component of a multi-geometries. The above masks tell if the geometry can be built as a multi-line strings or multi-points.

factory

private final org.locationtech.jts.geom.GeometryFactory factory

The JTS factory for creating geometry. May be user-specified. Note that the CoordinateSequenceFactory is ignored;

iterator

protected final PathIterator iterator

Iterator over the coordinates of the Java2D shape to convert to a JTS geometry.

length

protected int length

Number of values in the float[] or double[] array stored by sub-class.

geometryType

private int geometryType

Bitmask combination of the type of all geometries built. This is a combination of POINT, LINESTRING and/or POLYGON.

Constructor Details

ShapeConverter

ShapeConverter(org.locationtech.jts.geom.GeometryFactory factory,
 PathIterator iterator,
 boolean isFloat)

Creates a new converter from Java2D shape to JTS geometry.

Parameters:

factory - the JTS factory for creating geometry, or null for automatic.

iterator - iterator over the coordinates of the Java2D shape to convert to a JTS geometry.

isFloat - whether to store coordinates as float instead of double.

Method Details

create

static org.locationtech.jts.geom.Geometry create(org.locationtech.jts.geom.GeometryFactory factory,
 Shape shape,
 double flatness)

Converts a Java2D Shape to a JTS geometry. Coordinates are copies; this is not a view.

Parameters:

factory - factory to use for creating the geometry, or null for the default.

shape - the Java2D shape to convert. Cannot be null.

flatness - the maximum distance that line segments are allowed to deviate from curves.

Returns:

JTS geometry with shape coordinates. Never null but can be empty.

currentSegment

abstract int currentSegment()

Returns the coordinates and type of the current path segment in the iteration. This method delegate to one of the two PathIterator.currentSegment(…) methods, depending on the precision of floating-point values.

addPoint

abstract void addPoint()

Stores the single point obtained by the last call to currentSegment(). As a consequence, length is increased by 2.

toSequence

abstract PackedCoordinateSequence toSequence(boolean close)

Returns a copy of current coordinate values as a JTS coordinate sequence. The number of values to copy in a new array is length. The copy is wrapped in a PackedCoordinateSequence.

Parameters:

close - whether to ensure that the first point is repeated as the last point.

Returns:

a JTS coordinate sequence containing a copy of current coordinate values.

build

private org.locationtech.jts.geom.Geometry build()

Iterates over all coordinates given by the iterator and stores them in a JTS geometry. The path shall contain only straight lines; curves are not supported.

flush

private void flush(boolean isRing)

Copies current coordinates in a new JTS geometry, then resets length to 0 in preparation for the next geometry.

Parameters:

isRing - whether the geometry should be a closed polygon.