| gvSIG desktop 1

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

 *

 * Copyright (C) 2006 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.

 */

package org.gvsig.raster.grid.filter.enhancement;

import java.util.ArrayList;

import org.gvsig.raster.dataset.FileNotOpenException;

import org.gvsig.raster.dataset.Params;

import org.gvsig.raster.dataset.io.RasterDriverException;

import org.gvsig.raster.grid.filter.FilterTypeException;

import org.gvsig.raster.grid.filter.IRasterFilterListManager;

import org.gvsig.raster.grid.filter.RasterFilter;

import org.gvsig.raster.grid.filter.RasterFilterList;

import org.gvsig.raster.grid.filter.RasterFilterListManager;

import org.gvsig.raster.hierarchy.IStatistics;

import org.gvsig.raster.util.extensionPoints.ExtensionPoints;

import org.gvsig.raster.util.extensionPoints.ExtensionPointsSingleton;

/**

 * Gestor de la pila de filtros para el filtro de ecualizaci?n de histograma.

 * @author Nacho Brodin (nachobrodin@gmail.com)

 */

public class EcualizationManager implements IRasterFilterListManager {

        protected RasterFilterList                         filterList = null;

        /**

         * Constructor

         * @param filterListManager

         */

        public EcualizationManager(RasterFilterListManager filterListManager) {

                this.filterList = filterListManager.getFilterList();

        }

        public static void register() {

                ExtensionPoints extensionPoints = ExtensionPointsSingleton.getInstance();

                extensionPoints.add("RasterFilter", "Ecualization", EcualizationManager.class);

        }

        /**

         * A?ade un filtro de ecualizaci?n de histograma.

         * @param IStatistics

         * @throws FilterTypeException 

         */

        public void addEcualizationFilter(IStatistics stats, int[] renderBands) throws FilterTypeException {

                try {

                        if (!stats.isCalculated()) {

                                try {

                                        stats.calcFullStatistics();

                                } catch (FileNotOpenException e) {

                                        // No podemos aplicar el filtro

                                        return;

                                } catch (RasterDriverException e) {

                                        // No podemos aplicar el filtro

                                        return;

                                }

                        }

                        RasterFilter filter = createEnhancedFilter(stats, renderBands);

                        if (filter != null)

                                filterList.add(filter);

                } catch (InterruptedException e) {

                        //Si se ha interrumpido no a?adimos el filtro

                }

        }

        /**

         * Crea un filtro de Ecualizaci?n de histograma.

         * @param stats

         * @param renderBands

         * @return

         */

        public static RasterFilter createEnhancedFilter(IStatistics stats, int[] renderBands) {

                RasterFilter filter = new EcualizationByteFilter();

                if (filter != null) {

                        filter.addParam("stats", stats);

                        filter.addParam("renderBands", renderBands);

                }

                return filter;

        }

        /**

         * Obtiene un Array de Strings a partir de una pila de filtros. Cada elemento

         * del array tendr? la forma de elemento=valor.

         */

        public ArrayList getStringsFromFilterList(ArrayList filterList, RasterFilter rf) {

                return filterList;

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.grid.filter.IRasterFilterListManager#createFilterListFromStrings(java.util.ArrayList, java.lang.String, int)

         */

        public int createFilterListFromStrings(ArrayList filters, String fil, int filteri) throws FilterTypeException {

                return filteri;

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.grid.filter.IRasterFilterListManager#getRasterFilterList()

         */

        public ArrayList getRasterFilterList() {

                ArrayList filters = new ArrayList();

                filters.add(EcualizationFilter.class);

                return filters;

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.grid.filter.IRasterFilterListManager#addFilter(java.lang.Class, org.gvsig.raster.dataset.Params)

         */

        public void addFilter(Class classFilter, Params params) throws FilterTypeException {

                if (classFilter.equals(EcualizationFilter.class)) {

                        int[] renderBands = { 0, 1, 2 };

                        for (int i = 0; i < params.getNumParams(); i++) {

                                if (params.getParam(i).id.equals("RenderBands") && 

                                        params.getParam(i).defaultValue instanceof String) {

                                        String[] bands = new String((String) params.getParam(i).defaultValue).split(" ");

                                        renderBands[0] = new Integer(bands[0]).intValue();

                                        renderBands[1] = new Integer(bands[1]).intValue();

                                        renderBands[2] = new Integer(bands[2]).intValue();

                                        continue;

                                }

                        }

                        addEcualizationFilter((IStatistics) filterList.getEnvParam("IStatistics"), renderBands);

                }

        }

}