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.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.grid.filter.statistics.StatisticsListManager;

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 realce.

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

 */

public class EnhancementListManager implements RasterFilterListManager {

        protected RasterFilterList          filterList        = null;

        private RasterFilterListManagerImpl filterListManager = null;

        private Statistics                  stats             = null;

        /**

         * Constructor

         * @param filterListManager

         */

        public EnhancementListManager(RasterFilterListManagerImpl filterListManager) {

                this.filterListManager = filterListManager;

                this.filterList = filterListManager.getFilterList();

                stats = (Statistics)filterList.getEnvParam("IStatistics");

        }

        public Class<?> getFilterClassByID(String id) {

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

                        return LinearEnhancementFilter.class;

                return null;

        }

        /**

         * Asigna el objeto con las estadisticas.

         * @param stats

         */

        public void setStatistics(Statistics stats) {

                this.stats = stats;

        }

        /**

         * Registra EnhancementListManager en los puntos de extension de RasterFilter

         */

        public static void register() {

                ExtensionPointManager extensionPoints = ToolsLocator.getExtensionPointManager();

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

                point.append("Enhancement", "", EnhancementListManager.class);

        }

        /**

         * A?ade un filtro de realce.

         * La forma de inserci?n del filtro es fija ya que la inserci?n de un realce lleva implicita

         * la inserci?n de un filtro de recorte de colas (tailtrim), aunque no en todos los casos.

         * Si ya existe un filtro de realce en la lista se obtiene la posici?n de este.

         * Si es necesario un recorte de colas entonces se comprueba si existe un uno reemplazandose

         * por el nuevo y sino se insertar? uno. Al final reemplazamos el realce que existia.

         *

         * Si por el contrario no existen realce ni trim se a?aden ambos al final de la lista.

         * @param removeEnds eliminar extremos en los m?ximos y m?nimos

         * @param stats Objeto de estadisticas asociado

         * @param tailTrim porcentaje de recorte de colas. Ser? un valor entre 0 y 1.

         * @param insertionMode Modo de inserci?n

         * @param renderBands bandas RGB mostradas en la visualizaci?n.

         * @throws FilterTypeException

         */

        public void addEnhancedFilter(boolean removeEnds, Statistics stats, double tailTrim, int[] renderBands) throws FilterTypeException {

                try {

                        if (tailTrim == 0) { // En este caso siempre es necesario el m?ximo y

                                // m?nimo

                                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;

                                        }

                                }

                        } else {

                                StatisticsListManager slm = new StatisticsListManager(filterListManager, stats);

                                slm.addTailFilter(tailTrim, 0D, removeEnds, stats);

                        }

                        RasterFilter filter = createEnhancedFilter(removeEnds, stats, tailTrim, renderBands);

                        if (filter != null)

                                filterList.add(filter);

                } catch (ProcessInterruptedException e) {

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

                }

        }

        public static RasterFilter createEnhancedFilter(boolean removeEnds, Statistics stats, double tailTrim, int[] renderBands) {

                RasterFilter filter = new LinearEnhancementFloatFilter();

                if (filter != null) {

                        filter.addParam("stats", stats);

                        if (removeEnds) {

                                filter.addParam("remove", new Boolean(true));

                        } else {

                                filter.addParam("remove", new Boolean(false));

                        }

                        filter.addParam("tailTrim", new Double(tailTrim));

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

                if (rf instanceof LinearEnhancementFilter) {

                        filterList.add("filter.enhanced.active=true");

                        filterList.add("filter.enhanced.tailTrim=" + ((LinearEnhancementFilter) rf).getTailTrim().toString());

                        StringBuffer values = new StringBuffer();

                        for (int i = 0; i < ((LinearEnhancementFilter) rf).renderBands.length; i++) {

                                values.append(((LinearEnhancementFilter) rf).renderBands[i]);

                                if (i < ((LinearEnhancementFilter) rf).renderBands.length - 1)

                                        values.append(",");

                        }

                        filterList.add("filter.enhanced.renderbands=" + values.toString());

                        filterList.add("filter.enhanced.remove=" + ((LinearEnhancementFilter) rf).getRemoveEnds().toString());

                }

                return filterList;

        }

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

                if (fil.startsWith("filter.enhanced.active") && RasterFilterListManagerImpl.getValue(fil).equals("true") && stats != null) {

                        filters.remove(filteri);

                        double tailTrim = 0D;

                        int[] renderBands = new int[] { 0, 0, 0 };

                        for (int propFilter = 0; propFilter < filters.size(); propFilter++) {

                                String elem = (String) filters.get(propFilter);

                                if (elem.startsWith("filter.enhanced.tailTrim")) {

                                        try {

                                                tailTrim = new Double(RasterFilterListManagerImpl.getValue(elem)).doubleValue();

                                        } catch (NumberFormatException ex) {

                                                // tailTrim sigue valiendo 0

                                        }

                                }

                                if (elem.startsWith("filter.enhanced.renderbands")) {

                                        String value = RasterFilterListManagerImpl.getValue(elem);

                                        String[] valueList = value.split(",");

                                        renderBands = new int[valueList.length];

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

                                                try {

                                                        renderBands[i] = Integer.parseInt(valueList[i]);

                                                } catch (NumberFormatException e) {

                                                        // No a?ade el valor

                                                }

                                        }

                                        // filters.remove(propFilter);

                                        // propFilter--;

                                }

                                if (elem.startsWith("filter.enhanced.remove")) {

                                        addEnhancedFilter(Boolean.valueOf(RasterFilterListManagerImpl.getValue(elem)).booleanValue(), stats, tailTrim, renderBands);

                                        filters.remove(propFilter);

                                        propFilter--;

                                }

                        }

                        filteri = -1;

                }

                return filteri;

        }

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

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

                filters.add(LinearEnhancementFilter.class);

                return filters;

        }

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

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

                        boolean removeEnds = false;

                        double tailTrim = 0.0;

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

                        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("RemoveEnds") &&

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

                                        removeEnds = ((Boolean) ((ParamImpl)params.getParam(i)).getDefaultValue()).booleanValue();

                                        continue;

                                }

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

                                        ((ParamImpl)params.getParam(i)).getDefaultValue() instanceof Double)

                                        tailTrim = ((Double) ((ParamImpl)params.getParam(i)).getDefaultValue()).doubleValue() / 100.0;

                        }

                        addEnhancedFilter(removeEnds, (Statistics) filterList.getEnvParam("IStatistics"), tailTrim, renderBands);

                }

        }

        /*

         * (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(LinearEnhancementFilter.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;

        }

}