Siba/src/siba/model/SibaModel.java

package siba.model;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.LinkedList;
import java.util.List;

import org.apache.commons.compress.archivers.ArchiveException;
import org.apache.commons.compress.archivers.ArchiveStreamFactory;
import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
import org.apache.commons.compress.archivers.tar.TarArchiveInputStream;
import org.apache.commons.compress.utils.IOUtils;


public class SibaModel
{
	
public static File   backup(File repertoireAsauvegarder){
	 File sauvegarde = new File("");
	return sauvegarde;
}
public static File   md5(File repertoireAsauvegarder) throws IOException{
	 File sauvegarde = new File(repertoireAsauvegarder.getName()+"md5");
	 try
	{	byte[] byterepertoireAsauvegarder = repertoireAsauvegarder.toString().getBytes() ;
		byte[] hash = null;
		MessageDigest md = MessageDigest.getInstance("MD5");
		hash = md.digest(byterepertoireAsauvegarder);
		StringBuilder hashString = new StringBuilder();
		for (int i = 0; i < hash.length; i++)
		{
		        String hex = Integer.toHexString(hash[i]);
		        if (hex.length() == 1)
		        {
		                hashString.append('0');
		                hashString.append(hex.charAt(hex.length() - 1));
		        }
		        else
		                hashString.append(hex.substring(hex.length() - 2));
		}
		FileWriter ffw = new FileWriter(sauvegarde);
		ffw.write(hashString.toString());
		ffw.close();
	}
	catch (NoSuchAlgorithmException e)
	{
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
	 
	return sauvegarde;
}
public static void extract(File repertoireAdecompresser, File destination) throws IOException, ArchiveException{
	 File file = destination;

     final List<File> untaredFiles = new LinkedList<File>();
        InputStream is;
		try
		{
			is = new FileInputStream(repertoireAdecompresser);
		
		 
        final TarArchiveInputStream debInputStream = (TarArchiveInputStream) new ArchiveStreamFactory().createArchiveInputStream("tar", is);
        TarArchiveEntry entry = null; 
        while ((entry = (TarArchiveEntry)debInputStream.getNextEntry()) != null) {
            final File outputFile = new File(file, entry.getName());
            if (entry.isDirectory()) {
                if (!outputFile.exists()) {
                    if (!outputFile.mkdirs()) {
                        throw new IllegalStateException(String.format("Couldn't create directory %s.", outputFile.getAbsolutePath()));
                    }
                }
            } else {
                final OutputStream outputFileStream = new FileOutputStream(outputFile); 
                IOUtils.copy(debInputStream, outputFileStream);
                outputFileStream.close();
            }
            untaredFiles.add(outputFile);
        }
        debInputStream.close(); }
        catch (FileNotFoundException e)
		{
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

 }
}