WKBDatatype Class Reference

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 WKBDatatype:

Collaboration diagram for WKBDatatype:

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.WKB
	The default WKT type URI. More...
static final WKBDatatype	INSTANCE = new WKBDatatype()
	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 WKBDatatype.WKBTextSRS.getWkbText().

                                                         {
                WKBTextSRS wkbTextSRS = new WKBTextSRS(geometryLiteral);

                WKBReader wkbReader = new WKBReader();
                Geometry geometry;
                        try {
                                geometry = wkbReader.read(wkbTextSRS.getWkbText().getBytes());
                                return geometry;
                        } catch (ParseException e) {
                                throw new RuntimeException(e.getMessage());
                        }


            }

toString()

String toString

(

)

                                     {
                return "WKBDatatype{" + 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.

Referenced by AsBinary.operation().

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

Member Data Documentation

INSTANCE

final WKBDatatype INSTANCE = new WKBDatatype()

static

A static instance of WKTDatatype.

Referenced by LiteralRegistry.LiteralRegistry(), and AsBinary.operation().

URI

final String URI = POSTGIS.WKB

static

The default WKT type URI.

Referenced by LiteralRegistry.LiteralRegistry().