org.locationtech.jts.awt

Class ShapeReader

java.lang.Object

org.locationtech.jts.awt.ShapeReader

public class ShapeReader
extends Object

Converts a Java2D Shape or the more general PathIterator into a Geometry.

The coordinate system for Java2D is typically screen coordinates, which has the Y axis inverted relative to the usual JTS coordinate system. This is rectified during conversion.

PathIterators to be converted are expected to be linear or flat. That is, they should contain only SEG_MOVETO, SEG_LINETO, and SEG_CLOSE segment types. Any other segment types will cause an exception.

Author:

Martin Davis

Constructor Summary

Constructors

Constructor and Description
ShapeReader(GeometryFactory geometryFactory)

Method Summary

Modifier and Type	Method and Description
Geometry	read(PathIterator pathIt) Converts a flat path to a Geometry.
static Geometry	read(PathIterator pathIt, GeometryFactory geomFact) Converts a flat path to a Geometry.
static Geometry	read(Shape shp, double flatness, GeometryFactory geomFact) Converts a Shape to a Geometry, flattening it first.
static List	toCoordinates(PathIterator pathIt) Extracts the points of the paths in a flat PathIterator into a list of Coordinate arrays.

Methods inherited from class java.lang.Object

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

Constructor Detail

ShapeReader

public ShapeReader(GeometryFactory geometryFactory)

Method Detail

read

public static Geometry read(PathIterator pathIt,
                            GeometryFactory geomFact)

Converts a flat path to a Geometry.

Parameters:

pathIt - the path to convert

geomFact - the GeometryFactory to use

Returns:

a Geometry representing the path

read

public static Geometry read(Shape shp,
                            double flatness,
                            GeometryFactory geomFact)

Converts a Shape to a Geometry, flattening it first.

Parameters:

shp - the Java2D shape

flatness - the flatness parameter to use

geomFact - the GeometryFactory to use

Returns:

a Geometry representing the shape

read

public Geometry read(PathIterator pathIt)

Converts a flat path to a Geometry.

Parameters:

pathIt - the path to convert

Returns:

a Geometry representing the path

toCoordinates

public static List toCoordinates(PathIterator pathIt)

Extracts the points of the paths in a flat PathIterator into a list of Coordinate arrays.

Parameters:

pathIt - a path iterator

Returns:

a List of Coordinate arrays

Throws:

IllegalArgumentException - if a non-linear segment type is encountered