Subversion Repositories bacoAlunos

package pt.estgp.es.exemplos.hibernate.utils;

import java.io.*;
import java.security.DigestInputStream;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
 * @author Jorge Machado
 * @date 27/Mai/2008
 * @see jomm.utils
 */
public class StreamsUtils
{
    public static byte[] readBytes(5+0%2Fdocs%2Fapi+InputStream">InputStream stream) throws 1.5.0/docs/api/java/io/IOException.html">IOException
    {
        1.5.0/docs/api/java/io/ByteArrayOutputStream.html">ByteArrayOutputStream b = new 1.5.0/docs/api/java/io/ByteArrayOutputStream.html">ByteArrayOutputStream();
        int readedBytes;
        byte[] buf = new byte[1024];
        while ((readedBytes = stream.read(buf)) > 0)
        {
            b.write(buf, 0, readedBytes);
        }
        b.close();
        return b.toByteArray();
    }

    public static 1.5.0/docs/api/java/lang/String.html">String readString(5+0%2Fdocs%2Fapi+InputStream">InputStream stream) throws 1.5.0/docs/api/java/io/IOException.html">IOException
    {
        1.5.0/docs/api/java/io/ByteArrayOutputStream.html">ByteArrayOutputStream b = new 1.5.0/docs/api/java/io/ByteArrayOutputStream.html">ByteArrayOutputStream();
        int readedBytes;
        byte[] buf = new byte[1024];
        while ((readedBytes = stream.read(buf)) > 0)
        {
            b.write(buf, 0, readedBytes);
        }
        b.close();
        return b.toString();
    }

    public static void inputStream2File(5+0%2Fdocs%2Fapi+InputStream">InputStream stream, 1.5.0/docs/api/java/io/File.html">File f) throws 1.5.0/docs/api/java/io/IOException.html">IOException
    {
        f.getParentFile().mkdirs();
        1.5.0/docs/api/java/io/FileOutputStream.html">FileOutputStream out = new 1.5.0/docs/api/java/io/FileOutputStream.html">FileOutputStream(f);
        inputStream2OutputStream(stream,out);
    }

    /**
     * ATENTION this method does not close the given stream
     * @param stream
     * @param f
     * @return
     * @throws IOException
     */
    public static 1.5.0/docs/api/java/lang/String.html">String inputStream2FileGetMd5(5+0%2Fdocs%2Fapi+InputStream">InputStream stream, 1.5.0/docs/api/java/io/File.html">File f) throws 1.5.0/docs/api/java/io/IOException.html">IOException
    {
        f.getParentFile().mkdirs();
        1.5.0/docs/api/java/io/FileOutputStream.html">FileOutputStream out = new 1.5.0/docs/api/java/io/FileOutputStream.html">FileOutputStream(f);
        return inputStream2OutputStreamGetMd5(stream, out);
    }

    public static void inputStream2OutputStream(5+0%2Fdocs%2Fapi+InputStream">InputStream stream, 5+0%2Fdocs%2Fapi+OutputStream">OutputStream out) throws 1.5.0/docs/api/java/io/IOException.html">IOException
    {
        inputStream2OutputStream(stream,out,true,true);
    }

    public static void inputStream2OutputStream(5+0%2Fdocs%2Fapi+InputStream">InputStream stream, 5+0%2Fdocs%2Fapi+OutputStream">OutputStream out,boolean closeOut,boolean closeIn) throws 1.5.0/docs/api/java/io/IOException.html">IOException
    {
        int readedBytes;
        byte[] buf = new byte[1024];
        while ((readedBytes = stream.read(buf)) > 0)
        {
            out.write(buf, 0, readedBytes);
        }
        if(closeIn)
            stream.close();
        if(closeOut)
            out.close();
    }

    /**
     * Return digest Md5 from consumed bytes
     * * ATENTION this method does not close the given stream
     * @param stream
     * @param out
     * @return Md5 HEX
     * @throws IOException
     */
    public static 1.5.0/docs/api/java/lang/String.html">String inputStream2OutputStreamGetMd5(5+0%2Fdocs%2Fapi+InputStream">InputStream stream, 5+0%2Fdocs%2Fapi+OutputStream">OutputStream out) throws 1.5.0/docs/api/java/io/IOException.html">IOException
    {
        1.5.0/docs/api/java/security/MessageDigest.html">MessageDigest messageDigest = null;
        try {
            messageDigest = 1.5.0/docs/api/java/security/MessageDigest.html">MessageDigest.getInstance("MD5");
        } catch (1.5.0/docs/api/java/security/NoSuchAlgorithmException.html">NoSuchAlgorithmException e) {
            e.printStackTrace();
        }

        1.5.0/docs/api/java/security/DigestInputStream.html">DigestInputStream digestInputStream = new 1.5.0/docs/api/java/security/DigestInputStream.html">DigestInputStream(stream, messageDigest);
        int readedBytes;
        byte[] buf = new byte[1024];
        while ((readedBytes = digestInputStream.read(buf)) > 0)
        {
            out.write(buf, 0, readedBytes);
        }
        messageDigest = digestInputStream.getMessageDigest();
        1.5.0/docs/api/java/lang/String.html">String md5 = BytesUtils.toHex(messageDigest.digest());
        out.close();
        return md5;
    }

    /**
     * Return digest Md5 from consumed bytes
     * * ATENTION this method does not close the given stream
     * @param stream
     * @param out
     * @return Md5 HEX
     * @throws IOException
     */
    public static 1.5.0/docs/api/java/lang/String.html">String getFileMd5(1.5.0/docs/api/java/io/File.html">File f) throws 1.5.0/docs/api/java/io/IOException.html">IOException
    {
        1.5.0/docs/api/java/security/MessageDigest.html">MessageDigest messageDigest = null;
        try {
            messageDigest = 1.5.0/docs/api/java/security/MessageDigest.html">MessageDigest.getInstance("MD5");
        } catch (1.5.0/docs/api/java/security/NoSuchAlgorithmException.html">NoSuchAlgorithmException e) {
            e.printStackTrace();
        }

        1.5.0/docs/api/java/security/DigestInputStream.html">DigestInputStream digestInputStream = new 1.5.0/docs/api/java/security/DigestInputStream.html">DigestInputStream(new 1.5.0/docs/api/java/io/FileInputStream.html">FileInputStream(f), messageDigest);
        int readedBytes;
        byte[] buf = new byte[1024];
        while ((readedBytes = digestInputStream.read(buf)) > 0)
        {
            //nottinhg to do only calculate nd5
        }
        messageDigest = digestInputStream.getMessageDigest();
        1.5.0/docs/api/java/lang/String.html">String md5 = BytesUtils.toHex(messageDigest.digest());
        digestInputStream.close();
        return md5;
    }
}