Resample Class Reference

Inheritance diagram for Resample:

Collaboration diagram for Resample:

Public Member Functions
String	getURI ()
GridCoverage	modify (GridCoverage inputCoverage)
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_resample.stringValue();
        }

References POSTGIS.st_resample.

modify()

GridCoverage modify

(

GridCoverage

inputCoverage

)

Reimplemented from RasterModifierFunction.

                                                               {
                /*Interpolation interpolation = Interpolation.getInstance(Interpolation.INTERP_NEAREST);
        switch (resamplingType) {
        case BICUBIC:
            interpolation = Interpolation.getInstance(Interpolation.INTERP_BICUBIC);
            break;
        case BILINEAR:
            interpolation = Interpolation.getInstance(Interpolation.INTERP_BILINEAR);
            break;
        default:
            interpolation = Interpolation.getInstance(Interpolation.INTERP_NEAREST);
            break;
        }
 
        // recalculate gridenvelope
        CoordinateReferenceSystem crs = inputCoverage.getCoordinateReferenceSystem();
        ReferencedEnvelope extent = RasterHelper.getResolvedEnvelope(new ReferencedEnvelope(
                inputCoverage.getEnvelope()), cellSizeX, cellSizeY);
 
        Dimension dim = RasterHelper.getDimension(extent, cellSizeX, cellSizeY);
        GridEnvelope gridRange = new GridEnvelope(0, 0, dim.width, dim.height);
        GridGeometry gridGeometry = new GridGeometry(gridRange, extent);
 
        // execute resample
        try {
            return (GridCoverage) Operations.DEFAULT.resample(inputCoverage, crs, gridGeometry,
                    interpolation);
        } catch (CoverageProcessingException e) {
            throw new ProcessException(e);
        }*/
                return null;
        }