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 org.gvsig.fmap.dal.coverage.RasterLocator;

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

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

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

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

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

import org.gvsig.fmap.dal.coverage.store.RasterDataStore;

import org.gvsig.fmap.dal.coverage.store.parameter.RasterDataParameters;

import org.gvsig.fmap.dal.coverage.store.parameter.RemoteStoreParameters;

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

import org.gvsig.fmap.dal.coverage.util.ProviderServices;

import org.gvsig.fmap.dal.exception.CloseException;

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

import org.gvsig.tools.locator.LocatorException;

/**

 * Class to get histograms from a remote service. If the image has a fixed

 * size then a MultiDataStoreHistogram will build the histogram.

 * 

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

 */

public class RemoteStoreHistogram extends MultiProviderHistogramComputer {

        private RemoteRasterProvider                provider            = null;

        private HistogramComputer                   lastBufferHistogram = null;

        /**

         * Constructor

         * @param dataset

         */

        public RemoteStoreHistogram(RemoteRasterProvider prov) {

                super(prov);

                this.provider = prov;

        }

        /**

         * Obtiene el histograma. Pregunta a todos los datasets que forman el multidataset

         * por su histograma y luego los fusiona.

         * @return histograma 

         * @throws HistogramException 

         */

        public BufferHistogram getBufferHistogram()

                throws ProcessInterruptedException, HistogramException {

                if(((RemoteStoreParameters)provider.getDataParameters()).isSizeFixed()) 

                        return super.getBufferHistogram();

                else {

                        ProviderServices provServ = RasterLocator.getManager().getProviderServices();

                        RasterDataParameters storeParameters = provServ.createParameters(

                                        provider.getLastRequest().getPath());

                        storeParameters.setSRS(provider.getProjection());

                        try {

                                RasterDataStore mrs = RasterLocator.getManager().open(storeParameters);

                                lastBufferHistogram = mrs.getHistogramComputer();

                                BufferHistogram bh = lastBufferHistogram.getBufferHistogram();

                                mrs.close();

                                return bh;

                        } catch (LocatorException e) {

                                throw new HistogramException(e.getMessage(), e);

                        } catch (NotSupportedExtensionException e) {

                                throw new HistogramException(e.getMessage(), e);

                        } catch (RasterDriverException e) {

                                throw new HistogramException(e.getMessage(), e);

                        } catch (CloseException e) {

                                throw new HistogramException(e.getMessage(), e);

                        } 

                }

        }

        /**

         * Pone a cero el porcentaje de progreso del proceso de calculo de histograma

         */

        public void resetPercent() {

                if(((RemoteStoreParameters)provider.getDataParameters()).isSizeFixed()) 

                        super.resetPercent();

                else {

                        if(lastBufferHistogram != null)

                                lastBufferHistogram.resetPercent();

                }

        }

        /**

         * Obtiene el porcentaje de proceso en la construcci?n del histograma,

         * @return porcentaje de progreso

         */

        public int getPercent() {

                if(((RemoteStoreParameters)provider.getDataParameters()).isSizeFixed()) 

                        return super.getPercent();

                else {

                        if(lastBufferHistogram != null)

                                return lastBufferHistogram.getPercent();

                }

                return 0;

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.fmap.dal.coverage.dataset.Histogram#getMaximum()

         */

        public double getMaximum() {

                if(((RemoteStoreParameters)provider.getDataParameters()).isSizeFixed()) 

                        return super.getMaximum();

                else {

                        ProviderServices provServ = RasterLocator.getManager().getProviderServices();

                        RasterDataParameters storeParameters = provServ.createParameters(

                                        provider.getLastRequest().getPath());

                        storeParameters.setSRS(provider.getProjection());

                        try {

                                RasterDataStore mrs = RasterLocator.getManager().open(storeParameters);

                                double res = mrs.getHistogramComputer().getMaximum();

                                mrs.close();

                                return res;

                        } catch (LocatorException e) {

                                return 0;

                        } catch (NotSupportedExtensionException e) {

                                return 0;

                        } catch (RasterDriverException e) {

                                return 0;

                        } catch (CloseException e) {

                                return 0;

                        } 

                }

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.fmap.dal.coverage.dataset.Histogram#getMinimum()

         */

        public double getMinimum() {

                if(((RemoteStoreParameters)provider.getDataParameters()).isSizeFixed()) 

                        return super.getMinimum();

                else {

                        ProviderServices provServ = RasterLocator.getManager().getProviderServices();

                        RasterDataParameters storeParameters = provServ.createParameters(

                                        provider.getLastRequest().getPath());

                        storeParameters.setSRS(provider.getProjection());

                        try {

                                RasterDataStore mrs = RasterLocator.getManager().open(storeParameters);

                                double res = mrs.getHistogramComputer().getMinimum();

                                mrs.close();

                                return res;

                        } catch (LocatorException e) {

                                return 0;

                        } catch (NotSupportedExtensionException e) {

                                return 0;

                        } catch (RasterDriverException e) {

                                return 0;

                        } catch (CloseException e) {

                                return 0;

                        }

                }

        }

}