Package org.h2.util.geometry

Class GeoJsonUtils

java.lang.Object

org.h2.util.geometry.GeoJsonUtils

public final class GeoJsonUtils
extends java.lang.Object

GeoJson format support for GEOMETRY data type.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	GeoJsonUtils.GeoJsonTarget	Converter output target that writes a GeoJson.

Field Summary

Fields

Modifier and Type	Field	Description
(package private) static java.lang.String[]	TYPES	0-based type names of geometries, subtract 1 from type code to get index in this array.

Constructor Summary

Constructors

Modifier	Constructor	Description
private	GeoJsonUtils()

Method Summary

Modifier and Type	Method	Description
static byte[]	ewkbToGeoJson(byte[] ewkb, int dimensionSystem)	Converts EWKB with known dimension system to GeoJson.
static byte[]	geoJsonToEwkb(byte[] json, int srid)	Converts EWKB with known dimension system to GeoJson.
private static void	parse(JSONObject o, GeometryUtils.Target target, int type)
private static void	parse(JSONValue v, GeometryUtils.Target target)
private static void	parseCoordinate(JSONValue v, GeometryUtils.Target target, int index, int total)
private static void	parseGeometryCollection(JSONObject o, GeometryUtils.Target target)
private static void	parseLineString(JSONArray a, GeometryUtils.Target target)
private static void	parsePolygon(JSONArray a, GeometryUtils.Target target)
private static void	parseRing(JSONValue[] points, GeometryUtils.Target target)
private static double	readCoordinate(JSONValue[] values, int index)

Methods inherited from class java.lang.Object

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

Field Detail

TYPES

static final java.lang.String[] TYPES

0-based type names of geometries, subtract 1 from type code to get index in this array.

Constructor Detail

GeoJsonUtils

private GeoJsonUtils()

Method Detail

ewkbToGeoJson

public static byte[] ewkbToGeoJson(byte[] ewkb,
                                   int dimensionSystem)

Converts EWKB with known dimension system to GeoJson.

Parameters:

ewkb - geometry object in EWKB format

dimensionSystem - dimension system of the specified object, may be the same or smaller than its real dimension system. M dimension system is not supported.

Returns:

GeoJson representation of the specified geometry

Throws:

DbException - on unsupported dimension system

geoJsonToEwkb

public static byte[] geoJsonToEwkb(byte[] json,
                                   int srid)

Converts EWKB with known dimension system to GeoJson.

Parameters:

json - geometry object in GeoJson format

srid - the SRID of geometry

Returns:

GeoJson representation of the specified geometry

Throws:

DbException - on unsupported dimension system

parse

private static void parse(JSONValue v,
                          GeometryUtils.Target target)

parse

private static void parse(JSONObject o,
                          GeometryUtils.Target target,
                          int type)

parseGeometryCollection

private static void parseGeometryCollection(JSONObject o,
                                            GeometryUtils.Target target)

parseLineString

private static void parseLineString(JSONArray a,
                                    GeometryUtils.Target target)

parsePolygon

private static void parsePolygon(JSONArray a,
                                 GeometryUtils.Target target)

parseRing

private static void parseRing(JSONValue[] points,
                              GeometryUtils.Target target)

parseCoordinate

private static void parseCoordinate(JSONValue v,
                                    GeometryUtils.Target target,
                                    int index,
                                    int total)

readCoordinate

private static double readCoordinate(JSONValue[] values,
                                     int index)