Flip Class Reference

Inheritance diagram for Flip:

Collaboration diagram for Flip:

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

Member Function Documentation

evaluate()

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

inherited

                                                                                                            {
                if (args.length != 1) {
                        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());
                        GridCoverage result = modify(geom);
                        return valueFactory.createLiteral(((RasterLiteral) l).unparse(result),((Literal)args[0]).getDatatype());
                }
                return null;
        }

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

getURI()

String getURI

(

)

                               {
                return POSTGIS.st_flip.stringValue();
        }

References POSTGIS.st_flip.

modify()

GridCoverage modify

(

GridCoverage

raster

)

Reimplemented from RasterModifierFunction.

                                                        {/*
                final PlanarImage inputImage = (PlanarImage) ((GridCoverage)raster).getRenderedImage();
        ParameterBlockJAI parameterBlock = new ParameterBlockJAI("transpose", "rendered");
        parameterBlock.addSource(inputImage);
 
        parameterBlock.setParameter("type", TransposeDescriptor.FLIP_VERTICAL);
        PlanarImage outputImage = JAI.create("transpose", parameterBlock);
 
        final int numBands = raster.getSampleDimensions().size();
        GridCoverageFactory factory = CoverageFactoryFinder.getGridCoverageFactory(null);
        if (numBands == 1) {
                return raster;
        } else {
            SampleDimension[] bands = raster.getSampleDimensions().toArray(new SampleDimension[0]);
 
            Set<Number> nodataValues = bands[0].getNoDataValues();
            Object noData = nodataValues == null ? Integer.MAX_VALUE : nodataValues.iterator().next().doubleValue();
 
            Map properties = raster.getProperties();
            properties.put(Vocabulary.formatInternational(VocabularyKeys.NODATA), noData);
            properties.put("GC_NODATA", noData);
 
            return factory.create(raster.getName(), outputImage, raster.getEnvelope(), bands, null,
                    properties);*/
                return null;
        }