Uses of Interface
org.locationtech.jts.geom.CoordinateSequence

Packages that use CoordinateSequence

Package	Description
org.locationtech.jts.algorithm	Contains classes and interfaces implementing fundamental computational geometry algorithms.
org.locationtech.jts.algorithm.distance	Classes to compute distance metrics between geometries.
org.locationtech.jts.densify	Classes to perform densification on geometries.
org.locationtech.jts.geom	Contains the Geometry interface hierarchy and supporting classes.
org.locationtech.jts.geom.impl	Implementations of interfaces for geometric structures.
org.locationtech.jts.geom.util	Provides classes that parse and modify Geometry objects.
org.locationtech.jts.io	Contains the interfaces for converting JTS objects to and from other formats.
org.locationtech.jts.io.geojson
org.locationtech.jts.operation.buffer.validate	Classes to perform validation of the results of buffer operations.
org.locationtech.jts.operation.distance	Provides classes for computing the distance between geometries
org.locationtech.jts.operation.distance3d
org.locationtech.jts.operation.overlay.snap	Classes to perform snapping on geometries to prepare them for overlay operations.
org.locationtech.jts.operation.predicate	Classes which implement topological predicates optimized for particular kinds of geometries.
org.locationtech.jts.precision	Provides classes for analyzing and manipulating the precision of Geometries.
org.locationtech.jts.simplify	Classes which implement algorithms for simplifying or generalizing geometries.
org.locationtech.jts.util	Contains support classes for the Java Topology Suite.
org.locationtech.jtsexample.geom
org.locationtech.jtsexample.io.gml2
org.locationtech.jtstest.testbuilder.geom
org.locationtech.jtstest.util.io

Uses of CoordinateSequence in org.locationtech.jts.algorithm

Methods in org.locationtech.jts.algorithm with parameters of type CoordinateSequence

Modifier and Type	Method	Description
static boolean	PointLocation.isOnLine(Coordinate p, CoordinateSequence line)	Tests whether a point lies on the line defined by a CoordinateSequence.
static double	CGAlgorithms.length(CoordinateSequence pts)	Deprecated. Computes the length of a linestring specified by a sequence of points.
static int	RayCrossingCounter.locatePointInRing(Coordinate p, CoordinateSequence ring)	Determines the Location of a point in a ring.
static double	Length.ofLine(CoordinateSequence pts)	Computes the length of a linestring specified by a sequence of points.
static double	Area.ofRing(CoordinateSequence ring)	Computes the area for a ring.
static double	Area.ofRingSigned(CoordinateSequence ring)	Computes the signed area for a ring.
static double	CGAlgorithms.signedArea(CoordinateSequence ring)	Deprecated. Computes the signed area for a ring.

Uses of CoordinateSequence in org.locationtech.jts.algorithm.distance

Methods in org.locationtech.jts.algorithm.distance with parameters of type CoordinateSequence

Modifier and Type	Method	Description
void	DiscreteHausdorffDistance.MaxDensifiedByFractionDistanceFilter.filter(CoordinateSequence seq, int index)

Uses of CoordinateSequence in org.locationtech.jts.densify

Methods in org.locationtech.jts.densify that return CoordinateSequence

Modifier and Type	Method	Description
protected CoordinateSequence	Densifier.DensifyTransformer.transformCoordinates(CoordinateSequence coords, Geometry parent)

Methods in org.locationtech.jts.densify with parameters of type CoordinateSequence

Modifier and Type	Method	Description
protected CoordinateSequence	Densifier.DensifyTransformer.transformCoordinates(CoordinateSequence coords, Geometry parent)

Uses of CoordinateSequence in org.locationtech.jts.geom

Classes in org.locationtech.jts.geom that implement CoordinateSequence

Modifier and Type	Class	Description
(package private) class	DefaultCoordinateSequence	Deprecated. no longer used

Fields in org.locationtech.jts.geom declared as CoordinateSequence

Modifier and Type	Field	Description
private CoordinateSequence	Point.coordinates	The Coordinate wrapped by this Point.
protected CoordinateSequence	LineString.points	The points of this LineString.

Methods in org.locationtech.jts.geom that return CoordinateSequence

Modifier and Type	Method	Description
CoordinateSequence	CoordinateSequence.copy()	Returns a deep copy of this collection.
CoordinateSequence	CoordinateSequenceFactory.create(int size, int dimension)	Creates a CoordinateSequence of the specified size and dimension.
CoordinateSequence	CoordinateSequenceFactory.create(Coordinate[] coordinates)	Returns a CoordinateSequence based on the given array.
CoordinateSequence	CoordinateSequenceFactory.create(CoordinateSequence coordSeq)	Creates a CoordinateSequence which is a copy of the given CoordinateSequence.
CoordinateSequence	DefaultCoordinateSequenceFactory.create(int size, int dimension)	Deprecated.
CoordinateSequence	DefaultCoordinateSequenceFactory.create(Coordinate[] coordinates)	Deprecated. Returns a DefaultCoordinateSequence based on the given array (the array is not copied).
CoordinateSequence	DefaultCoordinateSequenceFactory.create(CoordinateSequence coordSeq)	Deprecated.
private static CoordinateSequence	CoordinateSequences.createClosedRing(CoordinateSequenceFactory fact, CoordinateSequence seq, int size)
static CoordinateSequence	CoordinateSequences.ensureValidRing(CoordinateSequenceFactory fact, CoordinateSequence seq)	Ensures that a CoordinateSequence forms a valid ring, returning a new closed sequence of the correct length if required.
static CoordinateSequence	CoordinateSequences.extend(CoordinateSequenceFactory fact, CoordinateSequence seq, int size)
CoordinateSequence	LineString.getCoordinateSequence()
CoordinateSequence	Point.getCoordinateSequence()

Methods in org.locationtech.jts.geom with parameters of type CoordinateSequence

Modifier and Type	Method	Description
protected int	CoordinateSequenceComparator.compareCoordinate(CoordinateSequence s1, CoordinateSequence s2, int i, int dimension)	Compares the same coordinate of two CoordinateSequences along the given number of dimensions.
static void	CoordinateSequences.copy(CoordinateSequence src, int srcPos, CoordinateSequence dest, int destPos, int length)	Copies a section of a CoordinateSequence to another CoordinateSequence.
static void	CoordinateSequences.copyCoord(CoordinateSequence src, int srcPos, CoordinateSequence dest, int destPos)	Copies a coordinate of a CoordinateSequence to another CoordinateSequence.
CoordinateSequence	CoordinateSequenceFactory.create(CoordinateSequence coordSeq)	Creates a CoordinateSequence which is a copy of the given CoordinateSequence.
CoordinateSequence	DefaultCoordinateSequenceFactory.create(CoordinateSequence coordSeq)	Deprecated.
private static CoordinateSequence	CoordinateSequences.createClosedRing(CoordinateSequenceFactory fact, CoordinateSequence seq, int size)
LinearRing	GeometryFactory.createLinearRing(CoordinateSequence coordinates)	Creates a LinearRing using the given CoordinateSequence.
LineString	GeometryFactory.createLineString(CoordinateSequence coordinates)	Creates a LineString using the given CoordinateSequence.
MultiPoint	GeometryFactory.createMultiPoint(CoordinateSequence coordinates)	Creates a MultiPoint using the points in the given CoordinateSequence.
Point	GeometryFactory.createPoint(CoordinateSequence coordinates)	Creates a Point using the given CoordinateSequence; a null or empty CoordinateSequence will create an empty Point.
Polygon	GeometryFactory.createPolygon(CoordinateSequence shell)	Constructs a Polygon with the given exterior boundary.
static CoordinateSequence	CoordinateSequences.ensureValidRing(CoordinateSequenceFactory fact, CoordinateSequence seq)	Ensures that a CoordinateSequence forms a valid ring, returning a new closed sequence of the correct length if required.
OctagonalEnvelope	OctagonalEnvelope.expandToInclude(CoordinateSequence seq)
static CoordinateSequence	CoordinateSequences.extend(CoordinateSequenceFactory fact, CoordinateSequence seq, int size)
void	CoordinateSequenceFilter.filter(CoordinateSequence seq, int i)	Performs an operation on a coordinate in a CoordinateSequence.
private void	LineString.init(CoordinateSequence points)
private void	Point.init(CoordinateSequence coordinates)
static boolean	CoordinateSequences.isEqual(CoordinateSequence cs1, CoordinateSequence cs2)	Tests whether two CoordinateSequences are equal.
static boolean	CoordinateSequences.isRing(CoordinateSequence seq)	Tests whether a CoordinateSequence forms a valid LinearRing, by checking the sequence length and closure (whether the first and last points are identical in 2D).
static void	CoordinateSequences.reverse(CoordinateSequence seq)	Reverses the coordinates in a sequence in-place.
static void	CoordinateSequences.swap(CoordinateSequence seq, int i, int j)	Swaps two coordinates in a sequence.
static java.lang.String	CoordinateSequences.toString(CoordinateSequence cs)	Creates a string representation of a CoordinateSequence.

Constructors in org.locationtech.jts.geom with parameters of type CoordinateSequence

Constructor	Description
DefaultCoordinateSequence(CoordinateSequence coordSeq)	Deprecated. Creates a new sequence based on a deep copy of the given CoordinateSequence.
LinearRing(CoordinateSequence points, GeometryFactory factory)	Constructs a LinearRing with the vertices specified by the given CoordinateSequence.
LineString(CoordinateSequence points, GeometryFactory factory)	Constructs a LineString with the given points.
Point(CoordinateSequence coordinates, GeometryFactory factory)

Uses of CoordinateSequence in org.locationtech.jts.geom.impl

Classes in org.locationtech.jts.geom.impl that implement CoordinateSequence

Modifier and Type	Class	Description
class	CoordinateArraySequence	A CoordinateSequence backed by an array of Coordinates.
class	PackedCoordinateSequence	A CoordinateSequence implementation based on a packed arrays.
static class	PackedCoordinateSequence.Double	Packed coordinate sequence implementation based on doubles
static class	PackedCoordinateSequence.Float	Packed coordinate sequence implementation based on floats

Methods in org.locationtech.jts.geom.impl that return CoordinateSequence

Modifier and Type	Method	Description
CoordinateSequence	CoordinateArraySequenceFactory.create(int size, int dimension)	The created sequence dimension is clamped to be <= 3.
CoordinateSequence	CoordinateArraySequenceFactory.create(Coordinate[] coordinates)	Returns a CoordinateArraySequence based on the given array (the array is not copied).
CoordinateSequence	CoordinateArraySequenceFactory.create(CoordinateSequence coordSeq)
CoordinateSequence	PackedCoordinateSequenceFactory.create(double[] packedCoordinates, int dimension)
CoordinateSequence	PackedCoordinateSequenceFactory.create(float[] packedCoordinates, int dimension)
CoordinateSequence	PackedCoordinateSequenceFactory.create(int size, int dimension)
CoordinateSequence	PackedCoordinateSequenceFactory.create(Coordinate[] coordinates)
CoordinateSequence	PackedCoordinateSequenceFactory.create(CoordinateSequence coordSeq)

Methods in org.locationtech.jts.geom.impl with parameters of type CoordinateSequence

Modifier and Type	Method	Description
CoordinateSequence	CoordinateArraySequenceFactory.create(CoordinateSequence coordSeq)
CoordinateSequence	PackedCoordinateSequenceFactory.create(CoordinateSequence coordSeq)

Constructors in org.locationtech.jts.geom.impl with parameters of type CoordinateSequence

Constructor	Description
CoordinateArraySequence(CoordinateSequence coordSeq)	Creates a new sequence based on a deep copy of the given CoordinateSequence.

Uses of CoordinateSequence in org.locationtech.jts.geom.util

Methods in org.locationtech.jts.geom.util that return CoordinateSequence

Modifier and Type	Method	Description
protected CoordinateSequence	GeometryTransformer.copy(CoordinateSequence seq)	Convenience method which provides a standard way of copying CoordinateSequences
protected CoordinateSequence	GeometryTransformer.createCoordinateSequence(Coordinate[] coords)	Convenience method which provides standard way of creating a CoordinateSequence
abstract CoordinateSequence	GeometryEditor.CoordinateSequenceOperation.edit(CoordinateSequence coordSeq, Geometry geometry)	Edits a CoordinateSequence from a Geometry.
protected CoordinateSequence	GeometryTransformer.transformCoordinates(CoordinateSequence coords, Geometry parent)	Transforms a CoordinateSequence.

Methods in org.locationtech.jts.geom.util with parameters of type CoordinateSequence

Modifier and Type	Method	Description
protected CoordinateSequence	GeometryTransformer.copy(CoordinateSequence seq)	Convenience method which provides a standard way of copying CoordinateSequences
abstract CoordinateSequence	GeometryEditor.CoordinateSequenceOperation.edit(CoordinateSequence coordSeq, Geometry geometry)	Edits a CoordinateSequence from a Geometry.
void	AffineTransformation.filter(CoordinateSequence seq, int i)	Transforms the i'th coordinate in the input sequence
void	AffineTransformation.transform(CoordinateSequence seq, int i)	Applies this transformation to the i'th coordinate in the given CoordinateSequence.
protected CoordinateSequence	GeometryTransformer.transformCoordinates(CoordinateSequence coords, Geometry parent)	Transforms a CoordinateSequence.

Uses of CoordinateSequence in org.locationtech.jts.io

Methods in org.locationtech.jts.io that return CoordinateSequence

Modifier and Type	Method	Description
private CoordinateSequence	WKBReader.readCoordinateSequence(int size)
private CoordinateSequence	WKBReader.readCoordinateSequenceLineString(int size)
private CoordinateSequence	WKBReader.readCoordinateSequenceRing(int size)

Methods in org.locationtech.jts.io with parameters of type CoordinateSequence

Modifier and Type	Method	Description
private void	WKTWriter.appendCoordinate(CoordinateSequence seq, int i, java.io.Writer writer)	Appends the i'th coordinate from the sequence to the writer
private void	WKTWriter.appendSequenceText(CoordinateSequence seq, int level, boolean doIndent, java.io.Writer writer)	Converts a LineString to <LineString Text> format, then appends it to the writer.
static java.lang.String	WKTWriter.toLineString(CoordinateSequence seq)	Generates the WKT for a LINESTRING specified by a CoordinateSequence.
private void	WKBWriter.writeCoordinate(CoordinateSequence seq, int index, OutStream os)
private void	WKBWriter.writeCoordinateSequence(CoordinateSequence seq, boolean writeSize, OutStream os)

Uses of CoordinateSequence in org.locationtech.jts.io.geojson

Methods in org.locationtech.jts.io.geojson that return CoordinateSequence

Modifier and Type	Method	Description
private CoordinateSequence	GeoJsonReader.createCoordinate(java.util.List<java.lang.Number> ordinates)
private CoordinateSequence	GeoJsonReader.createCoordinateSequence(java.util.List<java.util.List<java.lang.Number>> coordinates)

Methods in org.locationtech.jts.io.geojson with parameters of type CoordinateSequence

Modifier and Type	Method	Description
private java.lang.String	GeoJsonWriter.getJsonString(CoordinateSequence coordinateSequence)

Uses of CoordinateSequence in org.locationtech.jts.operation.buffer.validate

Methods in org.locationtech.jts.operation.buffer.validate with parameters of type CoordinateSequence

Modifier and Type	Method	Description
void	BufferCurveMaximumDistanceFinder.MaxMidpointDistanceFilter.filter(CoordinateSequence seq, int index)

Uses of CoordinateSequence in org.locationtech.jts.operation.distance

Fields in org.locationtech.jts.operation.distance declared as CoordinateSequence

Modifier and Type	Field	Description
private CoordinateSequence	FacetSequence.pts

Methods in org.locationtech.jts.operation.distance with parameters of type CoordinateSequence

Modifier and Type	Method	Description
private static void	FacetSequenceTreeBuilder.addFacetSequences(CoordinateSequence pts, java.util.List sections)

Constructors in org.locationtech.jts.operation.distance with parameters of type CoordinateSequence

Constructor	Description
FacetSequence(CoordinateSequence pts, int start)	Creates a new sequence for a single point from a CoordinateSequence.
FacetSequence(CoordinateSequence pts, int start, int end)	Creates a new section based on a CoordinateSequence.

Uses of CoordinateSequence in org.locationtech.jts.operation.distance3d

Classes in org.locationtech.jts.operation.distance3d that implement CoordinateSequence

Modifier and Type	Class	Description
class	AxisPlaneCoordinateSequence	A CoordinateSequence wrapper which projects 3D coordinates into one of the three Cartesian axis planes, using the standard orthonormal projection (i.e.

Fields in org.locationtech.jts.operation.distance3d declared as CoordinateSequence

Modifier and Type	Field	Description
private CoordinateSequence	AxisPlaneCoordinateSequence.seq

Methods in org.locationtech.jts.operation.distance3d that return CoordinateSequence

Modifier and Type	Method	Description
private static CoordinateSequence	PlanarPolygon3D.project(CoordinateSequence seq, int facingPlane)
static CoordinateSequence	AxisPlaneCoordinateSequence.projectToXY(CoordinateSequence seq)	Creates a wrapper projecting to the XY plane.
static CoordinateSequence	AxisPlaneCoordinateSequence.projectToXZ(CoordinateSequence seq)	Creates a wrapper projecting to the XZ plane.
static CoordinateSequence	AxisPlaneCoordinateSequence.projectToYZ(CoordinateSequence seq)	Creates a wrapper projecting to the YZ plane.

Methods in org.locationtech.jts.operation.distance3d with parameters of type CoordinateSequence

Modifier and Type	Method	Description
private Vector3D	PlanarPolygon3D.averageNormal(CoordinateSequence seq)	Computes an average normal vector from a list of polygon coordinates.
private Coordinate	PlanarPolygon3D.averagePoint(CoordinateSequence seq)	Computes a point which is the average of all coordinates in a sequence.
private static CoordinateSequence	PlanarPolygon3D.project(CoordinateSequence seq, int facingPlane)
static CoordinateSequence	AxisPlaneCoordinateSequence.projectToXY(CoordinateSequence seq)	Creates a wrapper projecting to the XY plane.
static CoordinateSequence	AxisPlaneCoordinateSequence.projectToXZ(CoordinateSequence seq)	Creates a wrapper projecting to the XZ plane.
static CoordinateSequence	AxisPlaneCoordinateSequence.projectToYZ(CoordinateSequence seq)	Creates a wrapper projecting to the YZ plane.

Constructors in org.locationtech.jts.operation.distance3d with parameters of type CoordinateSequence

Constructor	Description
AxisPlaneCoordinateSequence(CoordinateSequence seq, int[] indexMap)

Uses of CoordinateSequence in org.locationtech.jts.operation.overlay.snap

Methods in org.locationtech.jts.operation.overlay.snap that return CoordinateSequence

Modifier and Type	Method	Description
protected CoordinateSequence	SnapTransformer.transformCoordinates(CoordinateSequence coords, Geometry parent)

Methods in org.locationtech.jts.operation.overlay.snap with parameters of type CoordinateSequence

Modifier and Type	Method	Description
protected CoordinateSequence	SnapTransformer.transformCoordinates(CoordinateSequence coords, Geometry parent)

Uses of CoordinateSequence in org.locationtech.jts.operation.predicate

Fields in org.locationtech.jts.operation.predicate declared as CoordinateSequence

Modifier and Type	Field	Description
private CoordinateSequence	GeometryContainsPointVisitor.rectSeq

Uses of CoordinateSequence in org.locationtech.jts.precision

Methods in org.locationtech.jts.precision with parameters of type CoordinateSequence

Modifier and Type	Method	Description
void	CommonBitsRemover.Translater.filter(CoordinateSequence seq, int i)
void	CoordinatePrecisionReducerFilter.filter(CoordinateSequence seq, int i)	Rounds the Coordinates in the sequence to match the PrecisionModel
void	SimpleMinimumClearance.ComputeMCCoordinateSequenceFilter.filter(CoordinateSequence seq, int i)

Uses of CoordinateSequence in org.locationtech.jts.simplify

Methods in org.locationtech.jts.simplify that return CoordinateSequence

Modifier and Type	Method	Description
protected CoordinateSequence	DouglasPeuckerSimplifier.DPTransformer.transformCoordinates(CoordinateSequence coords, Geometry parent)
protected CoordinateSequence	TopologyPreservingSimplifier.LineStringTransformer.transformCoordinates(CoordinateSequence coords, Geometry parent)
protected CoordinateSequence	VWSimplifier.VWTransformer.transformCoordinates(CoordinateSequence coords, Geometry parent)

Methods in org.locationtech.jts.simplify with parameters of type CoordinateSequence

Modifier and Type	Method	Description
protected CoordinateSequence	DouglasPeuckerSimplifier.DPTransformer.transformCoordinates(CoordinateSequence coords, Geometry parent)
protected CoordinateSequence	TopologyPreservingSimplifier.LineStringTransformer.transformCoordinates(CoordinateSequence coords, Geometry parent)
protected CoordinateSequence	VWSimplifier.VWTransformer.transformCoordinates(CoordinateSequence coords, Geometry parent)

Uses of CoordinateSequence in org.locationtech.jts.util

Methods in org.locationtech.jts.util with parameters of type CoordinateSequence

Modifier and Type	Method	Description
void	Debug.SegmentFindingFilter.filter(CoordinateSequence seq, int i)

Uses of CoordinateSequence in org.locationtech.jtsexample.geom

Classes in org.locationtech.jtsexample.geom that implement CoordinateSequence

Modifier and Type	Class	Description
class	ExtendedCoordinateSequence	Demonstrates how to implement a CoordinateSequence for a new kind of coordinate (an ExtendedCoordinate in this example).

Methods in org.locationtech.jtsexample.geom that return CoordinateSequence

Modifier and Type	Method	Description
CoordinateSequence	ExtendedCoordinateSequenceFactory.create(int size, int dimension)
CoordinateSequence	ExtendedCoordinateSequenceFactory.create(Coordinate[] coordinates)	Returns an ExtendedCoordinateSequence based on the given array -- the array is used directly if it is an instance of ExtendedCoordinate[]; otherwise it is copied.
CoordinateSequence	ExtendedCoordinateSequenceFactory.create(CoordinateSequence coordSeq)

Methods in org.locationtech.jtsexample.geom with parameters of type CoordinateSequence

Modifier and Type	Method	Description
static ExtendedCoordinate[]	ExtendedCoordinateSequence.copy(CoordinateSequence coordSeq)
CoordinateSequence	ExtendedCoordinateSequenceFactory.create(CoordinateSequence coordSeq)

Constructors in org.locationtech.jtsexample.geom with parameters of type CoordinateSequence

Constructor	Description
ExtendedCoordinateSequence(CoordinateSequence coordSeq)	Constructor that makes a copy of a CoordinateSequence.

Uses of CoordinateSequence in org.locationtech.jtsexample.io.gml2

Methods in org.locationtech.jtsexample.io.gml2 with parameters of type CoordinateSequence

Modifier and Type	Method	Description
LinearRing	FixingGeometryFactory.createLinearRing(CoordinateSequence cs)

Uses of CoordinateSequence in org.locationtech.jtstest.testbuilder.geom

Methods in org.locationtech.jtstest.testbuilder.geom with parameters of type CoordinateSequence

Modifier and Type	Method	Description
private void	GeometryPointLocater.NearestSegmentLocationFilter.checkSegment(LineString lineStr, CoordinateSequence seq, int i)
private void	GeometryPointLocater.NearestSegmentLocationFilter.checkVertex(LineString lineStr, CoordinateSequence seq, int i)
void	AdjacentVertexFinder.AdjacentVertexFilter.filter(CoordinateSequence seq, int i)
void	NearestPointFinder.NearestPointFilter.filter(CoordinateSequence seq, int i)
void	VertexLocater.NearestVertexFilter.filter(CoordinateSequence seq, int i)
void	VertexLocater.NearVerticesFilter.filter(CoordinateSequence seq, int i)
private void	FacetLocater.findLocations(java.util.Stack path, Geometry compGeom, CoordinateSequence seq, java.util.List locations)
private void	FacetLocater.findSegmentLocations(java.util.Stack path, Geometry compGeom, CoordinateSequence seq, java.util.List locations)
private void	FacetLocater.findVertexLocations(java.util.Stack path, Geometry compGeom, CoordinateSequence seq, java.util.List locations)

Uses of CoordinateSequence in org.locationtech.jtstest.util.io

Methods in org.locationtech.jtstest.util.io with parameters of type CoordinateSequence

Modifier and Type	Method	Description
private void	SVGWriter.appendCoordinate(CoordinateSequence seq, int i, java.io.Writer writer)	Appends the i'th coordinate from the sequence to the writer
private void	SVGWriter.appendSequencePath(CoordinateSequence seq, int level, boolean doIndent, java.io.Writer writer)	Converts a LineString to <LineString Text> format, then appends it to the writer.
private void	SVGWriter.appendSequencePoints(CoordinateSequence seq, int level, boolean doIndent, java.io.Writer writer)