Package org.h2.util.geometry

Class EWKBUtils.EWKBTarget

java.lang.Object

org.h2.util.geometry.GeometryUtils.Target

org.h2.util.geometry.EWKBUtils.EWKBTarget

Enclosing class:

EWKBUtils

public static final class EWKBUtils.EWKBTarget
extends GeometryUtils.Target

Converter output target that writes a EWKB.

Constructor Summary

Constructors

Constructor	Description
EWKBTarget(java.io.ByteArrayOutputStream output, int dimensionSystem)	Creates a new EWKB output target.

Method Summary

Modifier and Type	Method	Description
protected void	addCoordinate(double x, double y, double z, double m, int index, int total)	Invoked to add a coordinate to a geometry.
protected void	init(int srid)	Initializes top-level target.
protected void	startCollection(int type, int numItems)	Invoked before writing of a collection.
protected GeometryUtils.Target	startCollectionItem(int index, int total)	Invoked before writing of a collection item.
protected void	startLineString(int numPoints)	Invoked before writing a LINESTRING.
protected void	startPoint()	Invoked before writing a POINT.
protected void	startPolygon(int numInner, int numPoints)	Invoked before writing a POLYGON.
protected void	startPolygonInner(int numInner)	Invoked before writing an inner polygon in POLYGON.

Methods inherited from class org.h2.util.geometry.GeometryUtils.Target

dimensionSystem, endCollectionItem, endNonEmptyPolygon, endObject

Methods inherited from class java.lang.Object

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

Constructor Detail

EWKBTarget

public EWKBTarget(java.io.ByteArrayOutputStream output,
                  int dimensionSystem)

Creates a new EWKB output target.

Parameters:

output - output stream

dimensionSystem - dimension system to use

Method Detail

init

protected void init(int srid)

Description copied from class: GeometryUtils.Target

Initializes top-level target.

Overrides:

init in class GeometryUtils.Target

Parameters:

srid - SRID

startPoint

protected void startPoint()

Description copied from class: GeometryUtils.Target

Invoked before writing a POINT.

Overrides:

startPoint in class GeometryUtils.Target

startLineString

protected void startLineString(int numPoints)

Description copied from class: GeometryUtils.Target

Invoked before writing a LINESTRING.

Overrides:

startLineString in class GeometryUtils.Target

Parameters:

numPoints - number of points in line string

startPolygon

protected void startPolygon(int numInner,
                            int numPoints)

Description copied from class: GeometryUtils.Target

Invoked before writing a POLYGON. If polygon is empty, both parameters are 0.

Overrides:

startPolygon in class GeometryUtils.Target

Parameters:

numInner - number of inner polygons

numPoints - number of points in outer polygon

startPolygonInner

protected void startPolygonInner(int numInner)

Description copied from class: GeometryUtils.Target

Invoked before writing an inner polygon in POLYGON.

Overrides:

startPolygonInner in class GeometryUtils.Target

Parameters:

numInner - number of points in inner polygon

startCollection

protected void startCollection(int type,
                               int numItems)

Description copied from class: GeometryUtils.Target

Invoked before writing of a collection.

Overrides:

startCollection in class GeometryUtils.Target

Parameters:

type - type of collection, one of GeometryUtils.MULTI_POINT, GeometryUtils.MULTI_LINE_STRING, GeometryUtils.MULTI_POLYGON, GeometryUtils.GEOMETRY_COLLECTION

numItems - number of items in this collection

startCollectionItem

protected GeometryUtils.Target startCollectionItem(int index,
                                                   int total)

Description copied from class: GeometryUtils.Target

Invoked before writing of a collection item.

Overrides:

startCollectionItem in class GeometryUtils.Target

Parameters:

index - 0-based index of this item in the collection

total - total number of items in the collection

Returns:

output target that should be used for processing of this collection item. May return this target or an custom sub-target.

addCoordinate

protected void addCoordinate(double x,
                             double y,
                             double z,
                             double m,
                             int index,
                             int total)

Description copied from class: GeometryUtils.Target

Invoked to add a coordinate to a geometry.

Specified by:

addCoordinate in class GeometryUtils.Target

Parameters:

x - X coordinate

y - Y coordinate

z - Z coordinate (NaN if not used)

m - M coordinate (NaN if not used)

index - 0-based index of coordinate in the current sequence

total - total number of coordinates in the current sequence