Application: gvSIG desktop

/* 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.

 * 

 */

/*

 * AUTHORS (In addition to CIT):

 * 2010 {Prodevelop}   {Task}

 */

package org.gvsig.installer.lib.impl.utils;

import java.io.BufferedInputStream;

import java.io.BufferedOutputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.OutputStream;

import java.util.ArrayList;

import java.util.List;

import java.util.zip.ZipEntry;

import java.util.zip.ZipOutputStream;

import org.gvsig.installer.lib.api.creation.InstallerCreationServiceException;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

/**

 * @author <a href="mailto:jpiera@gvsig.org">Jorge Piera Llodr&aacute;</a>

 */

public class Compress {

        static final int BUFFER = 2048;

        private static final Logger logger = LoggerFactory.getLogger(Compress.class);

        public Compress() {

                super();                

        }

        public void compressPlugin(File file, String fileName, OutputStream os) throws InstallerCreationServiceException {

                ArrayList<File> files = new ArrayList<File>();

                ArrayList<String> fileNames = new ArrayList<String>();

                files.add(file);

                fileNames.add(fileName);

                compressPlugins(files, fileNames, os);

        }

        public void compressPlugins(List<File> files, List<String> fileNames, OutputStream os) throws InstallerCreationServiceException {

                try{

                        ZipOutputStream zos = new ZipOutputStream(new BufferedOutputStream(os));

                        byte[] buf = new byte[1024];

                        int len;

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

                                File file = files.get(i);                                

                                int parentFileLenght = file.getParentFile().toString().length();

                                String pluginName = file.toString().substring(parentFileLenght, file.toString().length());                                

                                ZipEntry zipEntry = new ZipEntry(fileNames.get(i));                                

                                zos.putNextEntry(zipEntry);                                                                

                                ZipOutputStream zosPlugin = new ZipOutputStream(zos);                                

                                compressPluginFile(file, parentFileLenght, zosPlugin);                                

                                zosPlugin.finish();

                                zos.closeEntry();

                                zos.close();                                

                        }

                        zos.close();

                } catch (Exception e) {

                        logger.error("Error compressing the plugin");

                        throw new InstallerCreationServiceException("Error writing the plugin", e);

                }

        }

        private void compressPluginFile(File file, int parenFileLength, ZipOutputStream zosPlugin) throws IOException  {                

                if (file.isDirectory()) {

                        String[] fileNames = file.list();

                        if (fileNames != null) {

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

                                        compressPluginFile(new File(file, fileNames[i]), parenFileLength, zosPlugin);

                                }

                        }

                }else{

                        byte[] buf = new byte[1024];

                        int len;

                        String fileName = file.toString().substring(parenFileLength, file.toString().length());

                        ZipEntry zipEntry = new ZipEntry(fileName);      

                        zosPlugin.putNextEntry(zipEntry);   

                        FileInputStream fin = new FileInputStream(file);

                        BufferedInputStream in = new BufferedInputStream(fin);                            

                        while ((len = in.read(buf)) >= 0) {

                                zosPlugin.write(buf, 0, len);

                        }        

                        in.close();      

                        zosPlugin.closeEntry();

                }

        }

}