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.serializer;

import java.io.IOException;

import java.io.Reader;

import java.io.StringReader;

import java.text.ParseException;

import java.util.ArrayList;

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

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

import org.gvsig.raster.impl.datastruct.DefaultSerialInfo;

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

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 una serie y obtener esta informaci?n desde XML.

 * Esta clase implementa el interfaz IRmfBlock con los m?todos de escritura y

 * lectura. Estos ser?n utilizados por el gestor de ficheros RMF para escribir y

 * leer datos.

 * </P>

 * <P>

 * La estructura XML es la siguiente:

 * </P>

 * <P>

 * \<Serials\><BR>

 * &nbsp;\<Serial\><BR>

 * &nbsp;&nbsp;\<Name\>katrina\</Name\><BR>

 * &nbsp;&nbsp;\<Description\>Evoluci?n del huracan katrina\</Description\><BR>

 * &nbsp;&nbsp;\<Type\>Single value\</Type\><BR>

 * &nbsp;&nbsp;\<Dates\><BR>

 * &nbsp;&nbsp;&nbsp;\<Date\>28//8//2005-6:10:00\</Date\><BR>

 * &nbsp;&nbsp;\</Dates\><BR>

 * &nbsp;\</Serial\><BR>

 * \</Serials\><BR>

 * </P>

 *

 * @version 23/04/2007

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

 */

public class SerialRmfSerializer extends ClassSerializer {

        //TAGS

        public static final String MAIN_TAG   = "Serials";

        public static final String SERIAL     = "Serial";

        public static final String DESC       = "Description";

        public static final String TIMETYPE   = "TimeType";

        public static final String DATATYPE   = "DataType";

        public static final String DATES      = "Dates";

        public static final String DATE       = "Date";

        public static final String NAME       = "Name";

        private TimeSeries         serialInfo = null;

        /**

         * Registra GeoPointRmfSerializer en los puntos de extension de Serializer

         */

        public static void register() {

                ExtensionPointManager extensionPoints = ToolsLocator.getExtensionPointManager();

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

                point.append("Series", "", SerialRmfSerializer.class);

        }

        /**

         * Constructor. Asigna la lista de puntos a serializar.

         * @param ColorTable tabla a convertir en XML

         */

        public SerialRmfSerializer(TimeSeries serialInfo) {

                this.serialInfo = serialInfo;

        }

        private void readDate(DefaultSerialInfo tInfo, KXmlParser parser) throws ParseException {

                String d = parser.getText();

                try {

                        Double value = new Double(d);

                        tInfo.addValue(value.doubleValue());

                } catch (NumberFormatException e) {

                        tInfo.addValue(d);

                }

        }

        /**

         * Parsers a date list

         * @param tInfo

         * @param parser

         * @param xml

         * @param tag

         * @throws XmlPullParserException

         * @throws IOException

         * @throws ParsingException

         * @throws NumberFormatException

         * @throws ParseException 

         */

        public void parserDates(DefaultSerialInfo tInfo, KXmlParser parser, String parseableTag, String[] errorTags) throws XmlPullParserException, IOException, NumberFormatException, ParsingException, ParseException  {

                boolean end = false;

                boolean init = false;

                boolean readDate = false;

                int tag = parser.next();

                while (!end) {

                        switch (tag) {

                                case KXmlParser.END_DOCUMENT:

                                        return;

                                case KXmlParser.START_TAG:

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

                                                init = true;

                                        }

                                        if(init) {

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

                                                        readDate = true;

                                                }

                                        }

                                        break;

                                case KXmlParser.END_TAG:

                                        if (parser.getName().compareTo(parseableTag) == 0)

                                                end = true;

                                        break;

                                case KXmlParser.TEXT:

                                        if(readDate) {

                                                readDate(tInfo, parser);

                                                readDate = false;

                                        }

                                        break;

                        }

                        if (!end)

                                tag = parser.next();

                }

        }

        /**

         * Parsers a serial structure

         * @param tInfo

         * @param parser

         * @param xml

         * @param tag

         * @throws XmlPullParserException

         * @throws IOException

         * @throws ParsingException

         * @throws NumberFormatException

         * @throws ParseException 

         */

        public void parserSerial(DefaultSerialInfo tInfo, KXmlParser parser, String xml, int tag) throws XmlPullParserException, IOException, NumberFormatException, ParsingException, ParseException  {

                String name = parserString(parser, NAME, null);

                String desc = parserString(parser, DESC, null);

                String timeType = parserString(parser, TIMETYPE, null);

                String dataType = parserString(parser, DATATYPE, null);

                tInfo.setSerialName(name);

                tInfo.setDescription(desc);

                try {

                        tInfo.setTimeType(new Integer(timeType));

                } catch (NumberFormatException e) {

                }

                try {

                        tInfo.setDataType(new Integer(dataType));

                } catch (NumberFormatException e) {

                }

                parserDates(tInfo, parser, DATES, null);

        }

        /*

         * (non-Javadoc)

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

         */

        public void read(String xml) throws ParsingException {

                ArrayList<DefaultSerialInfo> list = new ArrayList<DefaultSerialInfo>();

                DefaultSerialInfo tInfo = null;

                boolean init = false;

                boolean tagOk = false;

                boolean end = false;

                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)

                                                                init = true;

                                                        if(init) {

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

                                                                        tInfo = new DefaultSerialInfo();

                                                                        tagOk = true;

                                                                }

                                                        }

                                                        break;

                                                case KXmlParser.END_TAG:

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

                                                                end = true;

                                                        break;

                                                case KXmlParser.TEXT:

                                                        if(tagOk) {

                                                                parserSerial(tInfo, parser, xml, tag);

                                                                list.add(tInfo);

                                                                tagOk = false;

                                                        }

                                                        break;

                                        }

                                        if(end)

                                                break;

                                        tag = parser.next();

                                }

                        }

                } catch (XmlPullParserException e) {

                        throw new ParsingException(xml);

                } catch (IOException e) {

                        throw new ParsingException(xml);

                } catch (NumberFormatException e) {

                        throw new ParsingException(xml);

                } catch (ParseException e) {

                        throw new ParsingException(xml);

                }

                ((DefaultTimeSerials)serialInfo).setSerial(list);

        }

        /*

         * (non-Javadoc)

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

         */

        public String write() {

                StringBuffer b = new StringBuffer();

                DefaultTimeSerials si = (DefaultTimeSerials)serialInfo;

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

                for (int i = 0; i < si.getNumberOfSerials(); i++) {

                        DefaultSerialInfo ti = si.getSerial(i);

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

                        putProperty(b, NAME, ti.getSerialName(), 2);

                        putProperty(b, DESC, ti.getDescription(), 2);

                        putProperty(b, TIMETYPE, ti.getTimeType() + "", 2);

                        putProperty(b, DATATYPE, ti.getDataType() + "", 2);

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

                        for (int j = 0; j < ti.getTime().size(); j++) {

                                putProperty(b, DATE, ti.getTimeInfo(j), 3);

                        }

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

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

                }

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

                return b.toString();

        }

        /*

         * (non-Javadoc)

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

         */

        public Object getResult() {

                return serialInfo;

        }

        /*

         *  (non-Javadoc)

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

         */

        public String getMainTag() {

                return MAIN_TAG;

        }

}