WKTDatatype class allows the URI "geo:wktLiteral" to be used as a datatype and it will parse that datatype to a JTS Geometry. More...

Inheritance diagram for TWKBDatatype:

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Collaboration diagram for TWKBDatatype:

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Classes
class	WKBTextSRS

Public Member Functions
String	unparse (Geometry geometry)
	This method Un-parses the JTS Geometry to the WKT literal. More...

Geometry	read (String geometryLiteral)

String	toString ()

Static Public Attributes
static final String	URI = POSTGIS.TWKB
	The default WKT type URI. More...

static final TWKBDatatype	INSTANCE = new TWKBDatatype()
	A static instance of WKTDatatype. More...

Detailed Description

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.

Member Function Documentation

◆ read()

Geometry read ( String geometryLiteral )

References LiteralUtils.createGeometry(), TWKBDatatype.WKBTextSRS.getWkbText(), and TWKBReader.read().

                                                  {
         WKBTextSRS wkbTextSRS = new WKBTextSRS(geometryLiteral);
 
         TWKBReader wkbReader = new TWKBReader();
         Geometry geometry;
                 try {
                         geometry = wkbReader.read(wkbTextSRS.getWkbText().getBytes());
                         return LiteralUtils.createGeometry(geometry.getCoordinates(), geometry.getGeometryType(), geometry.getSRID());
                 } catch (ParseException e) {
                         // TODO Auto-generated catch block
                         e.printStackTrace();
                         throw new RuntimeException();
                 }
 
 
     }

◆ toString()

String toString ( )

                              {
         return "TWKBDatatype{" + URI + '}';
     }

◆ unparse()

String unparse ( Geometry geometry )

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

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.

References TWKBWriter.write().

                                              {
             TWKBWriter writer=new TWKBWriter();
             return writer.write(geometry).toString();
     }

Member Data Documentation

◆ INSTANCE

final TWKBDatatype INSTANCE = new TWKBDatatype()

static

A static instance of WKTDatatype.

Referenced by LiteralRegistry.LiteralRegistry().

◆ URI

final String URI = POSTGIS.TWKB