Package io.debezium.data.geometry

Class Point

java.lang.Object

io.debezium.data.geometry.Geometry

io.debezium.data.geometry.Point

public class Point
extends Geometry

A semantic type for a geometric Point, defined as a set of (x,y) coordinates. This historically used to be a useful class, but is now mostly obsolete due to the generic Geometry type. TODO for 1.0: Decide whether to remove it or keep it.

Author:

Horia Chiorean, Omar Al-Safi

Field Summary

Fields

Modifier and Type	Field	Description
static String	LOGICAL_NAME
private static int	WKB_POINT
private static int	WKB_POINT_SIZE
static String	X_FIELD
static String	Y_FIELD

Fields inherited from class io.debezium.data.geometry.Geometry

SRID_FIELD, WKB_FIELD

Constructor Summary

Constructors

Constructor	Description
Point()

Method Summary

Modifier and Type	Method	Description
static org.apache.kafka.connect.data.SchemaBuilder	builder()	Returns a SchemaBuilder for a Point field.
private static byte[]	buildWKBPoint(double x, double y)	Creates WKB for a 2D {x,y} point.
static org.apache.kafka.connect.data.Struct	createValue(org.apache.kafka.connect.data.Schema geomSchema, byte[] wkb, Integer srid)	Create a value for this schema using WKB
static org.apache.kafka.connect.data.Struct	createValue(org.apache.kafka.connect.data.Schema geomSchema, double x, double y)	Creates a value for this schema using 2 given coordinates.
static double[]	parseWKBPoint(byte[] wkb)	Parses a 2D WKB Point into a {x,y} coordinate array.

Methods inherited from class io.debezium.data.geometry.Geometry

schema

Methods inherited from class java.lang.Object

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

Field Detail

LOGICAL_NAME

public static final String LOGICAL_NAME

See Also:

Constant Field Values

X_FIELD

public static final String X_FIELD

See Also:

Constant Field Values

Y_FIELD

public static final String Y_FIELD

See Also:

Constant Field Values

WKB_POINT

private static final int WKB_POINT

See Also:

Constant Field Values

WKB_POINT_SIZE

private static final int WKB_POINT_SIZE

See Also:

Constant Field Values

Constructor Detail

Point

public Point()

Method Detail

builder

public static org.apache.kafka.connect.data.SchemaBuilder builder()

Returns a SchemaBuilder for a Point field. A Geometry with extra X & Y fields

Returns:

the schema builder

buildWKBPoint

private static byte[] buildWKBPoint(double x,
                                    double y)

Creates WKB for a 2D {x,y} point.

Parameters:

x - coordinate

y - coordinate

Returns:

OGC WKB byte array

parseWKBPoint

public static double[] parseWKBPoint(byte[] wkb)
                              throws IllegalArgumentException

Parses a 2D WKB Point into a {x,y} coordinate array. Returns null for any non-point or points with Z/M/etc modifiers.

Parameters:

wkb - OGC WKB geometry

Returns:

x,y coordinate array

Throws:

IllegalArgumentException

createValue

public static org.apache.kafka.connect.data.Struct createValue(org.apache.kafka.connect.data.Schema geomSchema,
                                                               double x,
                                                               double y)

Creates a value for this schema using 2 given coordinates.

Parameters:

pointSchema - a Schema instance which represents a point; may not be null

x - the X coordinate of the point; may not be null

y - the Y coordinate of the point; may not be null

Returns:

a Struct which represents a Connect value for this schema; never null

createValue

public static org.apache.kafka.connect.data.Struct createValue(org.apache.kafka.connect.data.Schema geomSchema,
                                                               byte[] wkb,
                                                               Integer srid)
                                                        throws IllegalArgumentException

Create a value for this schema using WKB

Parameters:

pointSchema - a Schema instance which represents a point; may not be null

wkb - the original Well-Known binary representation of the coordinate; may not be null

srid - the coordinate reference system identifier; null if unset/unknown

Returns:

a Struct which represents a Connect value for this schema; never null

Throws:

IllegalArgumentException