org.geotools.geometry.jts

Class GeometryCoordinateSequenceTransformer

Object

GeometryCoordinateSequenceTransformer

public class GeometryCoordinateSequenceTransformer
extends Object

Service object that takes a geometry and applies a MathTransform to the coordinates it contains, creating a new geometry as the transformed output.

The standard usage pattern is to supply a MathTransform and @link CoordinateReferenceSystem} explicitly. The transform(Geometry) method can then be used to construct transformed geometries using the GeometryFactory and CoordinateSequenceFactory of the input geometry.

Author:

Andrea Aime, Martin Davis

Constructor Summary

Constructors

Constructor and Description
GeometryCoordinateSequenceTransformer() Creates a transformer which uses the CoordinateSequenceFactory of the source geometries.
GeometryCoordinateSequenceTransformer(CoordinateSequenceTransformer transformer) Creates a transformer which uses a client-specified CoordinateSequenceTransformer.

Method Summary

Modifier and Type	Method and Description
void	setCoordinateReferenceSystem(CoordinateReferenceSystem crs) Sets the target coordinate reference system.
void	setMathTransform(MathTransform transform) Sets the math transform to be used for transformation
Geometry	transform(Geometry g) Applies the transform to the provided geometry, creating a new transformed geometry.
LineString	transformLineString(LineString ls, GeometryFactory gf)
Point	transformPoint(Point point, GeometryFactory gf)
Polygon	transformPolygon(Polygon polygon, GeometryFactory gf)

Methods inherited from class Object

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

Constructor Detail

GeometryCoordinateSequenceTransformer

public GeometryCoordinateSequenceTransformer()

Creates a transformer which uses the CoordinateSequenceFactory of the source geometries.

GeometryCoordinateSequenceTransformer

public GeometryCoordinateSequenceTransformer(CoordinateSequenceTransformer transformer)

Creates a transformer which uses a client-specified CoordinateSequenceTransformer.

WARNING: The CoordinateSequenceTransformer must use the same CoordinateSequenceFactory as the output GeometryFactory, so that geometries are constructed consistently.

Method Detail

setMathTransform

public void setMathTransform(MathTransform transform)

Sets the math transform to be used for transformation

setCoordinateReferenceSystem

public void setCoordinateReferenceSystem(CoordinateReferenceSystem crs)

Sets the target coordinate reference system.

This value is used to set the coordinate reference system of geometries after they have been transformed.

Parameters:

crs - The target coordinate reference system.

transform

public Geometry transform(Geometry g)
                   throws TransformException

Applies the transform to the provided geometry, creating a new transformed geometry.

Parameters:

g - the geometry to transform

Returns:

a new transformed geometry

Throws:

TransformException

transformLineString

public LineString transformLineString(LineString ls,
                                      GeometryFactory gf)
                               throws TransformException

Throws:

TransformException

transformPoint

public Point transformPoint(Point point,
                            GeometryFactory gf)
                     throws TransformException

Throws:

TransformException

transformPolygon

public Polygon transformPolygon(Polygon polygon,
                                GeometryFactory gf)
                         throws TransformException

Throws:

TransformException