Mirror Class Reference

Inheritance diagram for Mirror:

Collaboration diagram for Mirror:

Public Member Functions
String	getURI ()
GridCoverage	modify (GridCoverage raster, Boolean type, Double zFactor)
Value	evaluate (ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException

Member Function Documentation

evaluate()

Value evaluate ( ValueFactory  valueFactory, Value...  args  ) throws ValueExprEvaluationException

inherited

                                                                                                            {
                if (args.length != 3) {
                        throw new ValueExprEvaluationException(getURI() + " requires exactly 1 arguments, got " + args.length);
                }
                LiteralType l=LiteralRegistry.getLiteral(((Literal)args[0]).getDatatype().toString());
                if(l instanceof RasterLiteral) {
                        GridCoverage geom=((RasterLiteral)l).read(args[0].stringValue());
                        Boolean type = Boolean.valueOf(args[1].stringValue());
                        Double zFactor = Double.valueOf(args[2].stringValue());
                        GridCoverage result = modify(geom,type,zFactor);
                        return valueFactory.createLiteral(((RasterLiteral) l).unparse(result),((Literal)args[0]).getDatatype());
                }
                return null;
        }

References LiteralRegistry.getLiteral(), and RasterModifierBoolDoubleFunction.modify().

getURI()

String getURI

(

)

                               {
                return POSTGIS.st_mirror.stringValue();
        }

References POSTGIS.st_mirror.

modify()

GridCoverage modify	(	GridCoverage	raster,
		Boolean	type,
		Double	zFactor
	)

Reimplemented from RasterModifierBoolDoubleFunction.

                                                                                      {
                 // transpose parameters: type
        // http://download.java.net/media/jai/javadoc/1.1.3/jai-apidocs/javax/media/jai/operator/TransposeDescriptor.html
        // http://java.sun.com/products/java-media/jai/forDevelopers/jai1_0_1guide-unc/Geom-image-manip.doc.html#51140
        final PlanarImage inputImage = (PlanarImage) raster.render(raster.getGridGeometry().getExtent());
        ParameterBlockJAI parameterBlock = new ParameterBlockJAI("transpose", "rendered");
        parameterBlock.addSource(inputImage);
 
        parameterBlock.setParameter("type", TransposeDescriptor.FLIP_HORIZONTAL);
        PlanarImage outputImage = JAI.create("transpose", parameterBlock);
 
        final int numBands = raster.getSampleDimensions().size();
        /*
        if (numBands == 1) {
                return raster;
        } else {
            List<SampleDimension> bands = raster.getSampleDimensions();
 
            Set<Number> nodataValues = bands.get(0).getNoDataValues();
            Object noData = nodataValues == null ? Integer.MAX_VALUE : nodataValues[0];
 
            Map properties = raster.getProperties();
            properties.put(Vocabulary.formatInternational(VocabularyKeys.NODATA), noData);
            properties.put("GC_NODATA", noData);
 
            GridCoverageFactory factory = CoverageFactoryFinder.getGridCoverageFactory(null);
                return CoverageWrapper.createGeometry(factory.create(raster. getName(), outputImage, raster.getEnvelope(), bands, null,
                    properties), wrapper.getSrsURI(), wrapper.getRasterDatatypeURI()).asNodeValue();
        }*/
        return null;
        }