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.store.properties;

import java.util.List;

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

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

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

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

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

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

import org.gvsig.raster.impl.provider.RasterProvider;

/**

 * Estadisticas asociadas a un fichero raster formado por multiples ficheros.

 *

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

 */

public class MultiProviderStatistics extends AbstractStatistics {

        protected Statistics[]                 statList      = null;

        protected int                          nBands        = 0;

        protected boolean                      forceToRecalc = false;

        protected RasterProvider               provider      = null;

        /**

         * Constructor

         */

        public MultiProviderStatistics() {

        }

        /**

         * Constructor

         */

        public MultiProviderStatistics(List<RasterProvider> providerList, RasterProvider provider) {

                this(providerList);

                this.provider = provider;

        }

        /**

         * Constructor

         */

        @SuppressWarnings("unused")

        private MultiProviderStatistics(RasterProvider[] providerList) {

                statList = new Statistics[providerList.length];

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

                        statList[i] = providerList[i].getStatistics();

                        this.nBands += providerList[i].getBandCount();

                }

        }

        /**

         * Constructor

         */

        private MultiProviderStatistics(List<RasterProvider> providerList) {

                statList = new Statistics[providerList.size()];

                for(int i = 0; i < providerList.size(); i ++) {

                        if(providerList.get(i) != null) {

                                statList[i] = providerList.get(i).getStatistics();

                                this.nBands += providerList.get(i).getBandCount();

                        }

                }

        }

        /**

         * Constructor

         */

        @SuppressWarnings("unused")

        private MultiProviderStatistics(Statistics[] statList, int nBands) {

                this.nBands = nBands;

                this.statList = statList;

                for(int nDataset = 0; nDataset < statList.length; nDataset ++) {

                        try {

                                statList[nDataset].calculate(RasterLibrary.statisticsScale);

                        } catch (FileNotOpenException e) {

                        } catch (RasterDriverException e) {

                        } catch (ProcessInterruptedException e) {

                        }

                }

                constructStats(nBands);

        }

        /**

         * Adds a new data store to the statistics list

         * @param provider

         */

        public void addProvider(RasterProvider provider) {

                Statistics[] statListAux = new Statistics[statList.length + 1];

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

                        statListAux[i] = statList[i];

                }

                statListAux[statList.length] = provider.getStatistics();

                statList = statListAux;

        }

        /**

         * Calcula las estadisticas recorriendo todo el fichero.

         */

        public void calculate(double scale)throws FileNotOpenException, RasterDriverException, ProcessInterruptedException {

                if (!forceToRecalc) {

                        if (!isCalculated()) {

                                try {

                                        provider.loadObjectFromRmf(SimpleProviderStatistics.class, this);

                                } catch (RmfSerializerException e) {

                                        // Si no se puede cargar del RMF, recalcularemos las estadisticas.

                                }

                        }

                        if (isCalculated())

                                return;

                }

                for(int nDataset = 0; nDataset < statList.length; nDataset ++) {

                        statList[nDataset].calculate(scale);

                }

                try {

                        constructStats(nBands);

                } catch (ArrayIndexOutOfBoundsException e) {

                        throw new RasterDriverException("Error en el acceso al array de m?ximos y m?nimos");

                }

                calculated = true;

                forceToRecalc = false;

                try {

                        provider.saveObjectToRmf(Statistics.class, this);

                } catch (RmfSerializerException e) {

                        // No salva a rmf

                }

        }

        public void resetPercent() {

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

                        statList[i].resetPercent();

                }

        }

        public int getPercent() {

                int sum = 0;

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

                        sum += statList[i].getPercent();

                }

                return sum / statList.length;

        }

        public void forceToRecalc() {

                this.forceToRecalc = true;

        }

        /**

         * Construye todos los datos del DatasetStadistics actual a partir de toda la

         * lista de DatasetStatistics que tiene este objeto.

         *

         * @param len

         * @throws ArrayIndexOutOfBoundsException

         */

        private void constructStats(int len) throws ArrayIndexOutOfBoundsException {

                max = new double[len];

                min = new double[len];

                secondMax = new double[len];

                secondMin = new double[len];

                maxByteUnsigned = new double[len];

                minByteUnsigned = new double[len];

                secondMaxByteUnsigned = new double[len];

                secondMinByteUnsigned = new double[len];

                mean = new double[len];

                variance = new double[len];

                nValues = new long[len];

                int count = 0;

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

                        if(statList[i].getMax() == null)

                                return;

                        for(int j = 0; j < statList[i].getMax().length; j ++) {

                                max[count] = statList[i].getMax()[j];

                                min[count] = statList[i].getMin()[j];

                                secondMax[count] = statList[i].getSecondMax()[j];

                                secondMin[count] = statList[i].getSecondMin()[j];

                                maxByteUnsigned[count] = statList[i].getMaxByteUnsigned()[j];

                                minByteUnsigned[count] = statList[i].getMinByteUnsigned()[j];

                                secondMaxByteUnsigned[count] = statList[i].getSecondMaxByteUnsigned()[j];

                                secondMinByteUnsigned[count] = statList[i].getSecondMinByteUnsigned()[j];

                                mean[count] = statList[i].getMean()[j];

                                variance[count] = statList[i].getVariance()[j];

                                nValues[count] = statList[i].getNumberOfValues()[j];

                                count ++;

                        }

                }

        }

        /**

         * Obtiene el flag que informa de si las estad?sticas est?n calculadas o no.

         * @return true indica que est?n calculadas y false que no lo est?n

         */

        public boolean isCalculated() {

                return calculated;

        }

        public int getBandCount() {

                if(bandCount <= 0) {

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

                                bandCount += statList[i].getBandCount();

                }

                return bandCount;

        }

        public void setBandCount(int bandCount) {

                this.bandCount = bandCount;

        }

        /**

         * Returns the number of providers.

         * @return

         */

        public int getNumberOfProviders() {

                return statList != null ? statList.length :0;

        }

        public Statistics cloneStatistics() {

                MultiProviderStatistics s = new MultiProviderStatistics();

                s.statList = statList;

                s.nBands = nBands;

                return super.cloneStatistics(s);

        }

}