Application: gvSIG desktop » gvSIG geoprocess

import org.gvsig.geoprocess.GeoProcessLocator;

import org.gvsig.geoprocess.GeoProcessManager;

 * 

 * @author gvSIG Team

    /**

     * Builds an instance of this operation.

     * 

     * @param distance

     * @param layer

     * @param userDistance

     */

    public InBufferOperation(IDistance distance, IVectorLayer layer,

        double userDistance) {

        super(distance, layer, userDistance);

    }

    public EditableFeature invoke(org.gvsig.fmap.geom.Geometry g,

        Feature feature) {

        // if we have radial internal buffers, we start by most interior buffer

        Geometry newGeom = null;

        Geometry previousInteriorRing = null;

        Geometry originalGeometry = GeometryUtil.geomToJTS(g);

        Geometry inputParam = originalGeometry;

        distance.setFeature(feature);

        GeoProcessManager manager = GeoProcessLocator.getGeoProcessManager();

        double bufferDistance =

            distance.getBufferDistance(userDistance, projection,

                manager.getDistanceUnits(), manager.getMapUnits());

        if (originalGeometry.getDimension() != 0)

            inputParam =

                TopologyPreservingSimplifier.simplify(originalGeometry,

                    bufferDistance / 10d);

        for (int i = numberOfRadialBuffers; i >= 1; i--) {

            double distRing = i * bufferDistance;

            BufferOp bufOp = new BufferOp(inputParam);

            bufOp.setEndCapStyle(capBuffer == CAP_ROUND

                ? BufferParameters.CAP_ROUND : BufferParameters.CAP_SQUARE);

            Geometry newGeometry = bufOp.getResultGeometry(-1 * distRing);

            if (verifyNilGeometry(newGeometry))

                return lastEditFeature;

            if (previousInteriorRing != null)

                newGeom =

                    JTSFacade.difference(newGeometry, previousInteriorRing);

            else

                newGeom = newGeometry;

            try {

                lastEditFeature = persister.addFeature(newGeom, id, distRing);

                id++;

                previousInteriorRing = newGeom;

            } catch (CreateGeometryException e) {

                Sextante.addErrorToLog(e);

            } catch (DataException e) {

                Sextante.addErrorToLog(e);

            }

        }

        return lastEditFeature;

    }

    /*

     * (non-Javadoc)

     * 

     * @see

     * org.gvsig.geoprocess.algorithm.base.core.GeometryOperation#invoke(org

     * .gvsig.fmap.geom.Geometry, org.gvsig.fmap.dal.feature.EditableFeature)

     */

    public void invoke(org.gvsig.fmap.geom.Geometry g, EditableFeature feature) {

        invoke(g, (Feature) feature);

    }