Application: gvSIG desktop

/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

package com.iver.cit.gvsig.fmap.drivers.shp;

import com.iver.cit.gvsig.fmap.core.IGeometry;

import com.iver.cit.gvsig.fmap.drivers.shp.write.SHPMultiLine;

import com.iver.cit.gvsig.fmap.drivers.shp.write.SHPMultiPoint;

import com.iver.cit.gvsig.fmap.drivers.shp.write.SHPPoint;

import com.iver.cit.gvsig.fmap.drivers.shp.write.SHPPolygon;

import com.iver.cit.gvsig.fmap.drivers.shp.write.SHPShape;

import com.iver.cit.gvsig.fmap.drivers.shp.write.ShapefileException;

import com.iver.cit.gvsig.fmap.layers.SelectableDataSource;

import java.io.File;

import java.util.BitSet;

/**

 * Clase con las constantes que representan los diferentes tipos de Shape y

 * m?todos est?ticos relativos a los shapes.

 *

 * @author Vicente Caballero Navarro

 */

public class SHP {

    public static final int NULL = 0;

    public static final int POINT2D = 1;

    public static final int POLYLINE2D = 3;

    public static final int POLYGON2D = 5;

    public static final int MULTIPOINT2D = 8;

    public static final int POINT3D = 11;

    public static final int POLYLINE3D = 13;

    public static final int POLYGON3D = 15;

    public static final int MULTIPOINT3D = 18;

    /**

     * Crea a partir del tipo de geometr?a un shape del tipo m?s adecuado.

     *

     * @param type Tipo de geometr?a.

     *

     * @return Geometr?a m?s adecuada.

     *

     * @throws ShapefileException Se lanza cuando es causada por la creaci?n

     *         del shape.

     */

    public static SHPShape create(int type) throws ShapefileException {

        SHPShape shape;

        switch (type) {

            case 1:

            case 11:

            case 21:

                shape = new SHPPoint(type);

                break;

            case 3:

            case 13:

            case 23:

                shape = new SHPMultiLine(type);

                break;

            case 5:

            case 15:

            case 25:

                shape = new SHPPolygon(type);

                break;

            case 8:

            case 18:

            case 28:

                shape = new SHPMultiPoint(type);

                break;

            default:

                shape = null;

        }

        return shape;

    }

    /**

     * Crea un fichero en formato shape con las geometr?as que se pasan como

     * par?metro en forma de array, un bitset para saber las seleccionadas, un

     * SelectableDataSource para obtener los valores y el fichero a crear.

     *

     * @param fgs Array de geometr?as.

     * @param bitset Bitset con la selecci?n.

     * @param sds SelectableDataSource.

     * @param f Fichero a crear o modificar.

     */

    public static void SHPFileFromGeometries(IGeometry[] fgs, BitSet bitset,

        SelectableDataSource sds, File f) {

        SHPOnlyFromGeometries(fgs, f);

        DBFFromGeometries dfg = new DBFFromGeometries(fgs, f);

        dfg.create(sds, bitset);

    }

    /**

     * Obtiene un fichero shape con las geometr?as que se pasan como par?metro,

     * sin crear un dbf.

     *

     * @param fgs Array de IGeometries.

     * @param f Fichero que hay que crear.

     */

    public static void SHPOnlyFromGeometries(IGeometry[] fgs, File f) {

        SHPSHXFromGeometries ssfg = new SHPSHXFromGeometries(fgs, f);

        ssfg.create();

    }

    /**

     * Devuelve un array con dos doubles, el primero representa el m?nimo valor

     * y el segundo el m?ximo de entre los valores que se pasan como par?metro

     * en forma de array.

     *

     * @param zs Valores a comprobar.

     *

     * @return Array de doubles con el valor m?nimo y el valor m?ximo.

     */

    public static double[] getZMinMax(double[] zs) {

        if (zs == null) {

            return null;

        }

        double min = Double.MAX_VALUE;

        double max = Double.NEGATIVE_INFINITY;

        for (int i = 0; i < zs.length; i++) {

            if (zs[i] > max) {

                max = zs[i];

            }

            if (zs[i] < min) {

                min = zs[i];

            }

        }

        return new double[] { min, max };

    }

}