Application: gvSIG desktop

package org.gvsig.remoteClient.gml.engine;

import java.io.IOException;

import java.io.InputStream;

import org.gvsig.exceptions.BaseException;

import org.gvsig.remoteClient.gml.engine.readers.IReaderFile;

import org.gvsig.remoteClient.gml.factories.IGeometriesFactory;

import org.gvsig.remoteClient.kml.exceptions.KmlException;

/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.

 *

 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

/* CVS MESSAGES:

 *

 * $Id: AbstractDriver.java 10269 2007-02-12 13:51:08Z jorpiell $

 * $Log$

 * Revision 1.1  2007-02-12 13:49:18  jorpiell

 * A?adido el driver de KML

 *

 *

 */

/**

 * @author Jorge Piera Llodr? (piera_jor@gva.es)

 */

public abstract class AbstractDriver implements IDriver{

        private InputStream inputStream = null;

        private IReaderFile reader = null;        

        protected IFeaturesParser featuresParser = null;

        /**

         * Constructor

         * @param file

         * File to read        

         * @param factory

         * Geometries factory that is used to create the parsed geometries

         * When the file is not found

         * @throws BaseException 

         */

        public AbstractDriver(InputStream file, IGeometriesFactory factory) throws BaseException{

                //file to parse...

                this.inputStream = file;                        

                initializeReader();

                initialize(factory);

        }

        /**

         * Initializes the file reader

         *

         */

        protected abstract void initializeReader() throws BaseException;

        /**

         * Initializes the IReader, tries to parse  the file header 

         * to obtain the version and parses all the needed schemas

         * @param factory

         * Geometries factory that is used to create the parsed 

         * geometries

         * @throws BaseException 

         */

        protected abstract void initialize(IGeometriesFactory factory) throws BaseException;

        /**

         * @return Returns the reader.

         */

        public IReaderFile getReader() {

                return reader;

        }

        /**

         * @param reader The reader to set.

         */

        protected void setReader(IReaderFile reader) {

                this.reader = reader;

        }

        /**

         * @return Returns the inputStream.

         */

        public InputStream getInputStream() {

                return inputStream;

        }

        /**

         * @return Returns the encoding.

         * @throws KmlException 

         */

        protected String getEncoding() throws KmlException {

                String encoding = "UTF-8";

                InputStream is = getInputStream();                

                int index = -1;

                int endIndex = -1;

                String header = "";

                boolean endHeader = false;

                try {

                        int i = 1;

                        while((!endHeader) && (i < 100)){

                                byte[] buffer = new byte[1];

                                is.read(buffer);

                                header = header + new String(buffer);

                                //This if is to locate the encoding string

                                if (index == -1) { 

                                        String searchText = "encoding=\"";

                                        index = header.indexOf(searchText);

                                        if (index > -1){

                                                header = "";

                                        }

                                }

                                //This if is to locate the encoding value

                                if (index > -1){

                                        String searchText = "\"";

                                        endIndex = header.indexOf(searchText);

                                        if (endIndex > -1){

                                                encoding = header.substring(0, endIndex);

                                        }

                                }

                                //To finish to parse the header

                                if (endIndex > -1){

                                        String searchText = ">";

                                        int headerEndIndex = header.indexOf(searchText);

                                        if (headerEndIndex > -1){

                                                endHeader = true;

                                        }

                                }

                                i++;

                        }                

                } catch (IOException e) {

                        throw new KmlException(getInputStream(),e);

                }                

                return encoding;

        }        

}