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/* 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.serializer;

import java.io.IOException;

import java.io.Reader;

import java.io.StringReader;

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

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

import org.gvsig.raster.impl.store.properties.DataStoreColorInterpretation;

import org.gvsig.raster.impl.store.rmf.ClassSerializer;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.extensionpoint.ExtensionPoint;

import org.gvsig.tools.extensionpoint.ExtensionPointManager;

import org.kxml2.io.KXmlParser;

import org.xmlpull.v1.XmlPullParserException;

/**

 * <P>

 * Clase para convertir a XML la informaci?n de interpretaci?n de color de cada

 * banda del raster.

 * </P>

 * \<ColorInterpretation\>

 * \<BandCount\>3\</BandCount\><BR>

 * \<Band\>Red\</Band\><BR>

 * \<Band\>Green\</Band\><BR>

 * \<Band\>Blue\</Band\><BR>

 * \</ColorInterpretation\><BR>

 *

 * @version 14/01/2008

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

 */

public class ColorInterpretationRmfSerializer extends ClassSerializer {

        //TAGS

        public static final String         MAIN_TAG  = "ColorInterpretation";

        public static final String         BAND      = "Band";

        public static final String         BANDCOUNT = "BandCount";

        private ColorInterpretation        datasetCI = null;

        /**

         * Registra ColorInterpretationRmfSerializer en los puntos de extension de Serializer

         */

        public static void register() {

                ExtensionPointManager extensionPoints =ToolsLocator.getExtensionPointManager();

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

                point.append("ColorInterpretation", "", ColorInterpretationRmfSerializer.class);

        }

        /**

         * Constructor. Asigna la tabla a serializar.

         * @param ColorTable tabla a convertir en XML

         */

        public ColorInterpretationRmfSerializer(DataStoreColorInterpretation datasetCI) {

                this.datasetCI = datasetCI;

        }

        /**

         * Constructor.

         */

        public ColorInterpretationRmfSerializer() {

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.dataset.io.rmf.IRmfBlock#read(java.lang.String)

         */

        public void read(String xml) throws ParsingException {

                String cInterp = null;

                datasetCI = new DataStoreColorInterpretation();

                KXmlParser parser = new KXmlParser();

                Reader reader = new StringReader(xml);

                try {

                        parser.setInput(reader);

                } catch (XmlPullParserException e) {

                        throw new ParsingException(xml);

                }

                try {

                        int tag = parser.nextTag();

                        if ( parser.getEventType() != KXmlParser.END_DOCUMENT ){

                                parser.require(KXmlParser.START_TAG, null, MAIN_TAG);

                                while(tag != KXmlParser.END_DOCUMENT) {

                                        switch(tag) {

                                                case KXmlParser.START_TAG:

                                                        if (parser.getName().compareTo(MAIN_TAG) == 0) {

                                                                int nBands = Integer.valueOf(parserString(parser, BANDCOUNT, null)).intValue();

                                                                datasetCI.initColorInterpretation(nBands);

                                                                for (int i = 0; i < nBands; i++) {

                                                                        cInterp = parserString(parser, BAND, null);

                                                                        datasetCI.setColorInterpValue(i, cInterp);

                                                                }

                                                        }

                                                        break;

                                                case KXmlParser.END_TAG:

                                                        break;

                                                case KXmlParser.TEXT:

                                                        break;

                                        }

                                        tag = parser.next();

                                }

                                parser.require(KXmlParser.END_DOCUMENT, null, null);

                        }

                } catch (XmlPullParserException e) {

                        throw new ParsingException(xml);

                } catch (IOException e) {

                        throw new ParsingException(xml);

                }

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.dataset.io.rmf.IRmfBlock#write()

         */

        public String write() {

                StringBuffer b = new StringBuffer();

                if (datasetCI == null)

                        return null;

                b.append("<" + MAIN_TAG + ">\n");

                putProperty(b, BANDCOUNT, datasetCI.length(), 1);

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

                        String ci = datasetCI.get(i);

                        if (ci != null)

                                putProperty(b, BAND, ci, 1);

                }

                b.append("</" + MAIN_TAG + ">\n");

                return b.toString();

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.dataset.io.rmf.IRmfBlock#getResult()

         */

        public Object getResult() {

                return datasetCI;

        }

        /*

         *  (non-Javadoc)

         * @see org.gvsig.raster.dataset.io.rmf.IRmfBlock#getMainTag()

         */

        public String getMainTag() {

                return MAIN_TAG;

        }

}