Application: gvSIG desktop » gvSIG raster

/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Government (CIT)

 *

 * 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., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 */

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

import java.util.ArrayList;

import java.util.List;

import org.gvsig.fmap.dal.coverage.RasterLibrary;

import org.gvsig.fmap.dal.coverage.dataset.Buffer;

import org.gvsig.fmap.dal.coverage.datastruct.BufferHistogram;

import org.gvsig.fmap.dal.coverage.datastruct.Params;

import org.gvsig.fmap.dal.coverage.exception.FileNotOpenException;

import org.gvsig.fmap.dal.coverage.exception.FilterTypeException;

import org.gvsig.fmap.dal.coverage.exception.ProcessInterruptedException;

import org.gvsig.fmap.dal.coverage.exception.RasterDriverException;

import org.gvsig.fmap.dal.coverage.grid.RasterFilter;

import org.gvsig.fmap.dal.coverage.grid.RasterFilterList;

import org.gvsig.fmap.dal.coverage.grid.RasterFilterListManager;

import org.gvsig.fmap.dal.coverage.store.props.Statistics;

import org.gvsig.raster.impl.grid.filter.RasterFilterListManagerImpl;

import org.gvsig.raster.impl.store.ParamImpl;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.extensionpoint.ExtensionPoint;

import org.gvsig.tools.extensionpoint.ExtensionPointManager;

/**

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

 *

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

 */

public class EqualizationManager implements RasterFilterListManager {

        protected RasterFilterList                         filterList = null;

        /**

         * Default constructor. Sets the filter list.

         * @param filterList

         */

        public EqualizationManager(RasterFilterList filterList) {

                this.filterList = filterList;

        }

        /**

         * Constructor

         * @param filterListManager

         */

        public EqualizationManager(RasterFilterListManagerImpl filterListManager) {

                this.filterList = filterListManager.getFilterList();

        }

        /**

         * Registra EqualizationManager en los puntos de extension de RasterFilter

         */

        public static void register() {

                ExtensionPointManager extensionPoints = ToolsLocator.getExtensionPointManager();

                ExtensionPoint point = extensionPoints.get("RasterFilter");

                point.append("Equalization", "", EqualizationManager.class);

        }

        public boolean isDataTypeSupported(int dataType) {

                if(dataType != Buffer.TYPE_BYTE)

                        return false;

                return true;

        }

        public Class<?> getFilterClassByID(String id) {

                if(id.compareTo("equalization") == 0)

                        return EqualizationFilter.class;

                return null;

        }

        /**

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

         * @param IStatistics

         * @throws FilterTypeException

         */

        public void addEqualizationFilter(Statistics stats, int[] renderBands, BufferHistogram hist, int[] ecualizedBands) throws FilterTypeException {

                try {

                        if (!stats.isCalculated()) {

                                try {

                                        stats.calculate(RasterLibrary.statisticsScale);

                                } catch (FileNotOpenException e) {

                                        // No podemos aplicar el filtro

                                        return;

                                } catch (RasterDriverException e) {

                                        // No podemos aplicar el filtro

                                        return;

                                }

                        }

                        RasterFilter filter = createEnhancedFilter(stats, renderBands, hist, ecualizedBands);

                        if (filter != null)

                                filterList.add(filter);

                } catch (ProcessInterruptedException 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(Statistics stats, int[] renderBands, BufferHistogram hist, int[] ecualizedBands) {

                RasterFilter filter = new EqualizationByteFilter();

                if (filter != null) {

                        filter.addParam("stats", stats);

                        filter.addParam("renderBands", renderBands);

                        filter.addParam("histogram", hist);

                        filter.addParam("ecualizedBands", ecualizedBands);

                }

                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 List<String> getStringsFromFilterList(List<String> filterList, RasterFilter rf) {

                return filterList;

        }

        public int createFilterListFromStrings(List<String> filters, String fil, int filteri) throws FilterTypeException {

                return filteri;

        }

        public List<Class<?>> getRasterFilterList() {

                List<Class<?>> filters = new ArrayList<Class<?>>();

                filters.add(EqualizationFilter.class);

                return filters;

        }

        /*

         * (non-Javadoc)

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

         */

        @SuppressWarnings("unchecked")

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

                if (EqualizationFilter.class.isAssignableFrom(classFilter)) {

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

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

                        BufferHistogram hist = null;

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

                                if (((ParamImpl)params.getParam(i)).getId().equals("RenderBands") &&

                                        ((ParamImpl)params.getParam(i)).getDefaultValue() instanceof String) {

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

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

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

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

                                        continue;

                                }

                                if (((ParamImpl)params.getParam(i)).getId().equals("Histogram") &&

                                        ((ParamImpl)params.getParam(i)).getDefaultValue() instanceof BufferHistogram) {

                                        hist = (BufferHistogram)((ParamImpl)params.getParam(i)).getDefaultValue();

                                }

                                if (((ParamImpl)params.getParam(i)).getId().equals("EcualizedBands") &&

                                        ((ParamImpl)params.getParam(i)).getDefaultValue() instanceof int[]) {

                                        ecualizedBands = (int[])((ParamImpl)params.getParam(i)).getDefaultValue();

                                }

                        }

                        addEqualizationFilter((Statistics) filterList.getEnvParam("IStatistics"), renderBands, hist, ecualizedBands);

                }

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.fmap.dal.coverage.grid.RasterFilterListManager#addFilter(org.gvsig.fmap.dal.coverage.datastruct.Params)

         */

        public void addFilter(Params params) throws FilterTypeException {

                addFilter(EqualizationFilter.class, params);

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.fmap.dal.coverage.grid.RasterFilterListManager#createFilter(org.gvsig.fmap.dal.coverage.datastruct.Params)

         */

        public RasterFilter createFilter(Params params) {

                //TODO: crear un filtro de este tipo

                return null;

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.fmap.dal.coverage.grid.RasterFilterListManager#getFilterList()

         */

        public RasterFilterList getFilterList() {

                return filterList;

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.fmap.dal.coverage.grid.RasterFilterListManager#setFilterList(org.gvsig.fmap.dal.coverage.grid.RasterFilterList)

         */

        public void setFilterList(RasterFilterList filterList) {

                this.filterList = filterList;

        }

}