| gvSIG desktop 1

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

 *

 * Copyright (C) 2007 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.

 */

package org.gvsig.raster.dataset.io.rmf;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileWriter;

import java.io.IOException;

import java.io.InputStreamReader;

import java.util.ArrayList;

/**

 * Gestor para la escritura de bloques XML en el fichero RMF. Cada cliente que quiere

 * escribir en el se registrar? a traves de ClientRegister y esta clase ser? la encargada

 * de gestionar la lectura y escritura de bloques.

 *

 * 21-abr-2007

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

 */

public class RmfBlocksManager extends ClientRegister implements IRmfBlock {

        public static final String MAIN_TAG = "RasterMetaFile";

        private String path = null;

        /**

         * Constructor. Asigna la ruta del fichero. 

         * @param path

         */

        public RmfBlocksManager(String path) {

                this.path = path;

        }

        /**

         * Asigna la ruta del fichero

         * @param path

         */

        public void setPath(String path) {

                this.path = path;

        }

        /*

         *  (non-Javadoc)

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

         */

        public void read(String xml) throws ParsingException {

                File file = new File(path);

                ArrayList lines = new ArrayList();

                BufferedReader inGrf = null;

                try {

                        inGrf = new BufferedReader(new InputStreamReader(new FileInputStream(file)));

                        String str = inGrf.readLine();

                        while(str != null) {

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

                                        IRmfBlock block = ((IRmfBlock)clients.get(i));

                                        String main = block.getMainTag();

                                        if(str.startsWith("<" + main)) {

                                                lines.clear();

                                                while(str.compareTo("</" + main + ">") != 0) {

                                                        lines.add(str);

                                                        str = inGrf.readLine();

                                                }

                                                lines.add(str);

                                                StringBuffer buf = new StringBuffer();

                                                for (int j = 0; j < lines.size(); j++)

                                                        buf.append((String)lines.get(j));

                                                block.read(buf.toString());

                                                break;

                                        }

                                }

                                str = inGrf.readLine();

                        }

                } catch (FileNotFoundException e) {

                        throw new ParsingException("File Input error: creating BufferedReader");

                } catch (IOException ex) {

                        throw new ParsingException("File Input error: reading lines");

                }

        }

        /**

         * Creaci?n de nuevo fichero RMF. A?ade la cabecera y vuelca el contenido de 

         * todos los IRmfBlock.

         * @param file Fichero

         * @return true si el fichero no existia y se ha creado nuevo

         * @throws IOException

         */

        private boolean create(File file) throws IOException {

                if(!file.exists()) {

                        file.createNewFile();

                        FileWriter writer = new FileWriter(file);

                        writer.write("<?xml version=\"1.0\" encoding=\"ISO-8859-15\"?>\n");

                        writer.write("<RasterMetaFile>\n");

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

                                IRmfBlock block = ((IRmfBlock)clients.get(i));

                                writer.write(block.write());

                        }

                        writer.write("\n</RasterMetaFile>\n");

                        writer.close();

                        return true;

                }

                return false;

        }

        /*

         *  (non-Javadoc)

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

         */

        public String write() throws IOException {

                File file = new File(path);

                ArrayList lines = new ArrayList();

                if(create(file))

                        return null;

                //A?adir bloques al fichero.

                BufferedReader inGrf = new BufferedReader(new InputStreamReader(new FileInputStream(file)));

                String str = inGrf.readLine();

                while(str != null) {

                        lines.add(str);

                        str = inGrf.readLine();

                }

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

                        IRmfBlock block = ((IRmfBlock)clients.get(i));

                        String tag = block.getMainTag();

                        for (int line = 0; line < lines.size(); line++) {

                                str = (String)lines.get(line);

                                if(str.compareTo("</" + getMainTag() + ">") == 0 || str.startsWith("<" + tag )) {

                                        String xmlBlock = block.write();

                                        if(line != 0)

                                                lines.add(line, xmlBlock);

                                        if(str.startsWith("<" + tag)) {

                                                while(((String)lines.get(line + 1)).compareTo("</" + tag + ">") != 0)

                                                        lines.remove(line + 1);

                                                lines.remove(line + 1);

                                        }

                                        break;

                                }

                        }                                         

                }

                //Escribir fichero de salida.

                file.delete();

                file.createNewFile();

                FileWriter writer = new FileWriter(file);

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

                        writer.write((String)lines.get(i) + "\n");

                writer.close();

                return null;

        }

        /*

         *  (non-Javadoc)

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

         */

        public String getMainTag() {

                return MAIN_TAG;

        }

        /*

         * (non-Javadoc)

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

         */

        public Object getResult() {

                return null;

        }

}