rdf4j-postgis  Version 0.1.0.0
PointFromText Class Reference

Creates a point from a WKT string representation. More...

Inheritance diagram for PointFromText:
Collaboration diagram for PointFromText:

Public Member Functions

Geometry construct (String input)
 
String getURI ()
 
Value evaluate (ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException
 

Detailed Description

Creates a point from a WKT string representation.

Member Function Documentation

◆ construct()

Geometry construct ( String  input)

Reimplemented from GeometricConstructor.

16  {
17  WKTReader wktreader=new WKTReader();
18  Geometry geom;
19  try {
20  geom = wktreader.read(input);
21  if("POINT".equalsIgnoreCase(geom.getGeometryType().toUpperCase())){
22  return geom;
23  }
24  } catch (ParseException e) {
25  // TODO Auto-generated catch block
26  e.printStackTrace();
27  }
28  return null;
29  }

◆ evaluate()

Value evaluate ( ValueFactory  valueFactory,
Value...  args 
) throws ValueExprEvaluationException
inherited
17  {
18  if (args.length != 1) {
19  throw new ValueExprEvaluationException(getURI() + " requires exactly 1 arguments, got " + args.length);
20  }
21  String geomString = args[0].stringValue();
22  Geometry result = construct(geomString);
23  return valueFactory.createLiteral(WKTDatatype.INSTANCE.unparse(result), WKTDatatype.LiteralIRI);
24  }

References GeometricConstructor.construct(), WKTDatatype.INSTANCE, WKTDatatype.LiteralIRI, and WKTDatatype.unparse().

Referenced by GeomFromGeoJSONTest.testGeomFromGeoJSON(), GeomFromTextTest.testGeomFromText(), GeomFromWKBTest.testGeomFromWKB(), MakeLineTest.testMakeLine1(), MakePointTest.testMakePoint1(), MakePointTest.testMakePointXYZ(), PointFromTextTest.testPointFromText(), and PolygonFromTextTest.testPolygonFromText().

◆ getURI()

String getURI ( )
32  {
33  return POSTGIS.st_pointFromText.stringValue();
34  }

References POSTGIS.st_pointFromText.