org.h2.util.geometry

Class GeometryUtils

java.lang.Object

org.h2.util.geometry.GeometryUtils

public final class GeometryUtils
extends java.lang.Object

Utilities for GEOMETRY data type.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	GeometryUtils.DimensionSystemTarget Converter output target that determines minimal dimension system for a geometry.
static class	GeometryUtils.EnvelopeTarget Converter output target that calculates an envelope.
static class	GeometryUtils.Target Converter output target.

Field Summary

Fields

Modifier and Type	Field and Description
static int	DIMENSION_SYSTEM_XY Code of 2D (XY) dimension system.
static int	DIMENSION_SYSTEM_XYM Code of M (XYM) dimension system.
static int	DIMENSION_SYSTEM_XYZ Code of Z (XYZ) dimension system.
static int	DIMENSION_SYSTEM_XYZM Code of ZM (XYZM) dimension system.
static int	GEOMETRY_COLLECTION GEOMETRYCOLLECTION geometry type.
static int	LINE_STRING LINESTRING geometry type.
static int	M Number of M coordinate.
static int	MAX_X Maximum X coordinate index.
static int	MAX_Y Maximum Y coordinate index.
static int	MIN_X Minimum X coordinate index.
static int	MIN_Y Minimum Y coordinate index.
static int	MULTI_LINE_STRING MULTILINESTRING geometry type.
static int	MULTI_POINT MULTIPOINT geometry type.
static int	MULTI_POLYGON MULTIPOLYGON geometry type.
static int	POINT POINT geometry type.
static int	POLYGON POLYGON geometry type.
static int	X Number of X coordinate.
static int	Y Number of Y coordinate.
static int	Z Number of Z coordinate.

Method Summary

Modifier and Type	Method and Description
static double[]	getEnvelope(byte[] ewkb) Calculates an envelope of a specified geometry.
static boolean	intersects(double[] envelope1, double[] envelope2) Checks whether two envelopes intersect with each other.
static double[]	union(double[] envelope1, double[] envelope2) Returns union of two envelopes.

Methods inherited from class java.lang.Object

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

Field Detail

POINT

public static final int POINT

POINT geometry type.

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Constant Field Values

LINE_STRING

public static final int LINE_STRING

LINESTRING geometry type.

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Constant Field Values

POLYGON

public static final int POLYGON

POLYGON geometry type.

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Constant Field Values

MULTI_POINT

public static final int MULTI_POINT

MULTIPOINT geometry type.

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Constant Field Values

MULTI_LINE_STRING

public static final int MULTI_LINE_STRING

MULTILINESTRING geometry type.

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Constant Field Values

MULTI_POLYGON

public static final int MULTI_POLYGON

MULTIPOLYGON geometry type.

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Constant Field Values

GEOMETRY_COLLECTION

public static final int GEOMETRY_COLLECTION

GEOMETRYCOLLECTION geometry type.

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Constant Field Values

X

public static final int X

Number of X coordinate.

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Constant Field Values

Y

public static final int Y

Number of Y coordinate.

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Constant Field Values

Z

public static final int Z

Number of Z coordinate.

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Constant Field Values

M

public static final int M

Number of M coordinate.

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Constant Field Values

DIMENSION_SYSTEM_XY

public static final int DIMENSION_SYSTEM_XY

Code of 2D (XY) dimension system.

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Constant Field Values

DIMENSION_SYSTEM_XYZ

public static final int DIMENSION_SYSTEM_XYZ

Code of Z (XYZ) dimension system. Can also be used in bit masks to determine presence of dimension Z.

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Constant Field Values

DIMENSION_SYSTEM_XYM

public static final int DIMENSION_SYSTEM_XYM

Code of M (XYM) dimension system. Can also be used in bit masks to determine presence of dimension M.

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Constant Field Values

DIMENSION_SYSTEM_XYZM

public static final int DIMENSION_SYSTEM_XYZM

Code of ZM (XYZM) dimension system. Can be also combined from DIMENSION_SYSTEM_XYZ and DIMENSION_SYSTEM_XYM using bitwise OR.

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Constant Field Values

MIN_X

public static final int MIN_X

Minimum X coordinate index.

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Constant Field Values

MAX_X

public static final int MAX_X

Maximum X coordinate index.

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Constant Field Values

MIN_Y

public static final int MIN_Y

Minimum Y coordinate index.

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Constant Field Values

MAX_Y

public static final int MAX_Y

Maximum Y coordinate index.

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Constant Field Values

Method Detail

getEnvelope

public static double[] getEnvelope(byte[] ewkb)

Calculates an envelope of a specified geometry.

Parameters:

ewkb - EWKB of a geometry

Returns:

envelope, or null

intersects

public static boolean intersects(double[] envelope1,
                                 double[] envelope2)

Checks whether two envelopes intersect with each other.

Parameters:

envelope1 - first envelope, or null

envelope2 - second envelope, or null

Returns:

whether the specified envelopes intersects

union

public static double[] union(double[] envelope1,
                             double[] envelope2)

Returns union of two envelopes. This method does not modify the specified envelopes, but may return one of them as a result.

Parameters:

envelope1 - first envelope, or null

envelope2 - second envelope, or null

Returns:

union of two envelopes