org.h2.util.geometry

Class GeoJsonUtils.GeoJsonTarget

java.lang.Object

org.h2.util.geometry.GeometryUtils.Target

org.h2.util.geometry.GeoJsonUtils.GeoJsonTarget

Enclosing class:

GeoJsonUtils

public static final class GeoJsonUtils.GeoJsonTarget
extends GeometryUtils.Target

Converter output target that writes a GeoJson.

Constructor Summary

Constructors

Constructor and Description
GeoJsonTarget(JSONByteArrayTarget output, int dimensionSystem) Creates new GeoJson output target.

Method Summary

Modifier and Type	Method and 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	endNonEmptyPolygon() Invoked after writing of non-empty POLYGON.
protected void	endObject(int type) Invoked after writing of the object.
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, init

Methods inherited from class java.lang.Object

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

Constructor Detail

GeoJsonTarget

public GeoJsonTarget(JSONByteArrayTarget output,
                     int dimensionSystem)

Creates new GeoJson output target.

Parameters:

output - output JSON target

dimensionSystem - dimension system to use

Method Detail

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

endNonEmptyPolygon

protected void endNonEmptyPolygon()

Description copied from class: GeometryUtils.Target

Invoked after writing of non-empty POLYGON.

Overrides:

endNonEmptyPolygon in class GeometryUtils.Target

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.

endObject

protected void endObject(int type)

Description copied from class: GeometryUtils.Target

Invoked after writing of the object.

Overrides:

endObject in class GeometryUtils.Target

Parameters:

type - type of the object

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