org.h2gis.functions.spatial.buffer

Class ST_Buffer

java.lang.Object

org.h2gis.api.AbstractFunction

org.h2gis.api.DeterministicScalarFunction

org.h2gis.functions.spatial.buffer.ST_Buffer

All Implemented Interfaces:

org.h2gis.api.Function, org.h2gis.api.ScalarFunction

public class ST_Buffer
extends org.h2gis.api.DeterministicScalarFunction

ST_Buffer computes a buffer around a Geometry. Circular arcs are approximated using 8 segments per quadrant. In particular, circles contain 32 line segments.

Author:

Nicolas Fortin, Erwan Bocher

Field Summary

Fields inherited from interface org.h2gis.api.ScalarFunction

PROP_DETERMINISTIC, PROP_NOBUFFER

Fields inherited from interface org.h2gis.api.Function

PROP_NAME, PROP_REMARKS

Constructor Summary

Constructors

Constructor and Description
ST_Buffer() Default constructor

Method Summary

Modifier and Type	Method and Description
static org.locationtech.jts.geom.Geometry	buffer(org.locationtech.jts.geom.Geometry geom, Double distance)
static org.locationtech.jts.geom.Geometry	buffer(org.locationtech.jts.geom.Geometry geom, Double distance, org.h2.value.Value value)
String	getJavaStaticMethod()

Methods inherited from class org.h2gis.api.AbstractFunction

addProperty, getProperty, removeProperty

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.h2gis.api.Function

getProperty

Constructor Detail

ST_Buffer

public ST_Buffer()

Default constructor

Method Detail

getJavaStaticMethod

public String getJavaStaticMethod()

buffer

public static org.locationtech.jts.geom.Geometry buffer(org.locationtech.jts.geom.Geometry geom,
                                                        Double distance)

Parameters:

geom - Geometry instance

distance - Buffer width in projection unit

Returns:

geom buffer around geom geometry.

buffer

public static org.locationtech.jts.geom.Geometry buffer(org.locationtech.jts.geom.Geometry geom,
                                                        Double distance,
                                                        org.h2.value.Value value)
                                                 throws IllegalArgumentException

Parameters:

geom - Geometry instance

distance - Buffer width in projection unit

value - Int or varchar end type

Returns:

a buffer around a geometry.

Throws:

IllegalArgumentException