Examples of DimensionFilter

org.geotools.referencing.operation.transform.DimensionFilter
An utility class for the separation of {@linkplain ConcatenatedTransform concatenation} of{@linkplain PassThroughTransform pass through transforms}. Given an arbitrary {@linkplain MathTransform math transform}, this utility class will returns a new math transform that operates only of a given set of source dimensions. For example if the supplied {@code transform} has (x, y, z) inputs and(longitude, latitude, height) outputs, then the following code:
```
 {@linkplain #addSourceDimensionRange addSourceDimensionRange}(0, 2); MathTransform mt =  {@linkplain #separate separate}(transform); 
```
will returns a transform with (x, y) inputs and (probably) (longitude, latitude) outputs. The later can be verified with a call to {@link #getTargetDimensions}.
@since 2.1 @source $URL$ @version $Id$ @author Martin Desruisseaux (IRD) @author Simone Giannecchini @todo This class is specific to Geotools implementation; it is better to avoid it ifyou can. It could be generalized a bit if we perform the same operations on {@link org.opengis.referencing.operation.CoordinateOperation} interfaces insteadof math transforms. We should revisit this issue after grid coverage API has been revisited (since grid coverage is a user of this class). @todo This class contains a set of static methods that could be factored out insome kind of {@code org.geotools.util.SortedIntegerSet} implementation.

Examples of org.geotools.referencing.operation.transform.DimensionFilter

                if (upperDim-lowerDim != toSource2D.getSourceDimensions()) {
                    // TODO: localize
                    throw new InvalidGridGeometryException("Unsupported math transform.");
                }
                final MathTransformFactory factory = ReferencingFactoryFinder.getMathTransformFactory(hints);
                final DimensionFilter       filter = new DimensionFilter(factory);
                toTarget = gridToCrs2D;
                try {
                    if (lowerDim != 0) {
                        filter.addSourceDimensionRange(0, lowerDim);
                        MathTransform step = filter.separate(toSource);
                        ensureStableDimensions(filter);
                        step = factory.createPassThroughTransform(0, step, sourceDim-lowerDim);
                        toTarget = factory.createConcatenatedTransform(step, toTarget);
                    }
                    if (upperDim != sourceDim) {
                        filter.clear();
                        filter.addSourceDimensionRange(upperDim, sourceDim);
                        MathTransform step = filter.separate(toSource);
                        ensureStableDimensions(filter);
                        step = factory.createPassThroughTransform(upperDim, step, 0);
                        toTarget = factory.createConcatenatedTransform(toTarget, step);
                    }
                } catch (FactoryException exception) {

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Examples of org.geotools.referencing.operation.transform.DimensionFilter

        }
        /*
         * Finds the axis for the two dimensional parts. We infer them from the grid range.
         * If no grid range were specified, then we assume that they are the 2 first dimensions.
         */
        final DimensionFilter filter = DimensionFilter.getInstance(hints);
        if (gridRange != null) {
            final int dimension = gridRange.getDimension();
            for (int i=0; i<dimension; i++) {
                if (gridRange.getSpan(i) > 1) {
                    filter.addSourceDimension(i);
                }
            }
        } else {
            filter.addSourceDimensionRange(0, 2);
        }
        Exception cause = null;
        int[] dimensions = filter.getSourceDimensions();
        /*
         * Select a math transform that operate only on the two dimensions choosen above.
         * If such a math transform doesn't have exactly 2 output dimensions, then select
         * the same output dimensions than the input ones.
         */
        MathTransform candidate;
        if (dimensions.length == 2) {
            axis[0] = dimensions[0]; // gridDimensionX
            axis[1] = dimensions[1]; // gridDimensionY
            try {
                candidate = filter.separate(transform);
                if (candidate.getTargetDimensions() != 2) {
                    filter.clear();
                    filter.addSourceDimensions(dimensions);
                    filter.addTargetDimensions(dimensions);
                    candidate = filter.separate(transform);
                }
                dimensions = filter.getTargetDimensions();
                axis[2] = dimensions[0]; // axisDimensionX
                axis[3] = dimensions[1]; // axisDimensionY
                try {
                    return (MathTransform2D) candidate;
                } catch (ClassCastException exception) {

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Examples of org.geotools.referencing.operation.transform.DimensionFilter

    private static MathTransform2D toMathTransform2D(final MathTransform        transform,
                                                     final MathTransformFactory mtFactory,
                                                     final GridGeometry2D       sourceGG)
            throws FactoryException
    {
        final DimensionFilter filter = new DimensionFilter(mtFactory);
        filter.addSourceDimension(sourceGG.axisDimensionX);
        filter.addSourceDimension(sourceGG.axisDimensionY);
        MathTransform candidate = filter.separate(transform);
        if (candidate instanceof MathTransform2D) {
            return (MathTransform2D) candidate;
        }
        filter.addTargetDimension(sourceGG.axisDimensionX);
        filter.addTargetDimension(sourceGG.axisDimensionY);
        candidate = filter.separate(transform);
        if (candidate instanceof MathTransform2D) {
            return (MathTransform2D) candidate;
        }
        throw new FactoryException(Errors.format(ErrorKeys.NO_TRANSFORM2D_AVAILABLE));
    }

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