Package org.apache.jena.geosparql.implementation.datatype

Class WKTDatatype

java.lang.Object

org.apache.jena.datatypes.BaseDatatype

org.apache.jena.geosparql.implementation.datatype.GeometryDatatype

org.apache.jena.geosparql.implementation.datatype.WKTDatatype

All Implemented Interfaces:

RDFDatatype

public class WKTDatatype
extends GeometryDatatype

WKTDatatype class allows the URI "geo:wktLiteral" to be used as a datatype and it will parse that datatype to a JTS Geometry. Req 10 All RDFS Literals of type geo:wktLiteral shall consist of an optional URI identifying the coordinate reference system followed by Simple Features Well Known Text (WKT) describing a geometric value. Valid geo:wktLiterals are formed by concatenating a valid, absolute URI as defined in [RFC 2396], one or more spaces (Unicode U+0020 character) as a separator, and a WKT string as defined in Simple Features [ISO 19125-1]. Req 11 The URI <http://www.opengis.net/def/crs/OGC/1.3/CRS84> shall be assumed as the spatial reference system for geo:wktLiterals that do not * specify an explicit spatial reference system URI.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.jena.datatypes.BaseDatatype

BaseDatatype.TypedValue

Field Summary

Fields

Modifier and Type	Field	Description
static final WKTDatatype	INSTANCE	A static instance of WKTDatatype.
static final String	URI	The default WKT type URI.

Method Summary

Modifier and Type	Method	Description
GeometryWrapper	read(String geometryLiteral)
String	toString()
String	unparse(Object geometry)	This method Un-parses the JTS Geometry to the WKT literal

Methods inherited from class org.apache.jena.geosparql.implementation.datatype.GeometryDatatype

check, checkURI, get, get, parse, parse, registerDatatypes

Methods inherited from class org.apache.jena.datatypes.BaseDatatype

cannonicalise, extendedTypeDefinition, getHashCode, getJavaClass, getURI, isEqual, isValid, isValidLiteral, isValidValue, langTagCompatible, normalizeSubType

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

URI

public static final String URI

The default WKT type URI.

See Also:

• Constant Field Values

INSTANCE

public static final WKTDatatype INSTANCE

A static instance of WKTDatatype.

Method Details

unparse

public String unparse(Object geometry)

This method Un-parses the JTS Geometry to the WKT literal

Specified by:

unparse in interface RDFDatatype

Overrides:

unparse in class BaseDatatype

Parameters:

geometry - - the JTS Geometry to be un-parsed

Returns:

WKT - the returned WKT Literal.
Notice that the Spatial Reference System is not specified in returned WKT literal.

read

public GeometryWrapper read(String geometryLiteral)

Specified by:

read in class GeometryDatatype

toString

public String toString()

Overrides:

toString in class BaseDatatype