Ejemplo n.º 1
0
  private static void testExceptions(FileChannel fc) throws IOException {
    checkException(fc, null, 0L, fc.size(), NullPointerException.class);

    checkException(fc, MapMode.READ_ONLY, -1L, fc.size(), IllegalArgumentException.class);

    checkException(
        fc, null, -1L, fc.size(), IllegalArgumentException.class, NullPointerException.class);

    checkException(fc, MapMode.READ_ONLY, 0L, -1L, IllegalArgumentException.class);

    checkException(fc, null, 0L, -1L, IllegalArgumentException.class, NullPointerException.class);

    checkException(
        fc, MapMode.READ_ONLY, 0L, Integer.MAX_VALUE + 1L, IllegalArgumentException.class);

    checkException(
        fc,
        null,
        0L,
        Integer.MAX_VALUE + 1L,
        IllegalArgumentException.class,
        NullPointerException.class);

    checkException(fc, MapMode.READ_ONLY, Long.MAX_VALUE, 1L, IllegalArgumentException.class);

    checkException(
        fc, null, Long.MAX_VALUE, 1L, IllegalArgumentException.class, NullPointerException.class);
  }
Ejemplo n.º 2
0
  public void write(Tag tag, RandomAccessFile raf, RandomAccessFile tempRaf)
      throws CannotWriteException, IOException {
    FileChannel fc = raf.getChannel();

    int oldTagSize = 0;

    if (tagExists(fc)) {
      // read the length
      if (!canOverwrite(raf))
        throw new CannotWriteException("Overwritting of this kind of ID3v2 tag not supported yet");
      fc.position(6);

      ByteBuffer buf = ByteBuffer.allocate(4);
      fc.read(buf);
      oldTagSize = (buf.get(0) & 0xFF) << 21;
      oldTagSize += (buf.get(1) & 0xFF) << 14;
      oldTagSize += (buf.get(2) & 0xFF) << 7;
      oldTagSize += buf.get(3) & 0xFF;
      oldTagSize += 10;

      // System.err.println("Old tag size: "+oldTagSize);
      int newTagSize = tc.getTagLength(tag);

      if (oldTagSize >= newTagSize) {
        // replace
        // System.err.println("Old ID32v Tag found, replacing the old
        // tag");
        fc.position(0);

        fc.write(tc.convert(tag, oldTagSize - newTagSize));

        // ID3v2 Tag Written

        return;
      }
    }

    // create new tag with padding
    // System.err.println("Creating a new ID3v2 Tag");
    fc.position(oldTagSize);

    if (fc.size() > 15 * 1024 * 1024) {
      FileChannel tempFC = tempRaf.getChannel();

      tempFC.position(0);
      tempFC.write(tc.convert(tag, Id3v2TagCreator.DEFAULT_PADDING));
      tempFC.transferFrom(fc, tempFC.position(), fc.size() - oldTagSize);

      fc.close();
    } else {
      ByteBuffer[] content = new ByteBuffer[2];

      content[1] = ByteBuffer.allocate((int) fc.size());
      fc.read(content[1]);
      content[1].rewind();
      content[0] = tc.convert(tag, Id3v2TagCreator.DEFAULT_PADDING);
      fc.position(0);
      fc.write(content);
    }
  }
Ejemplo n.º 3
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 public static void main(String[] arguments) {
   try {
     // read byte data into a byte buffer
     String data = "friends.dat";
     FileInputStream inData = new FileInputStream(data);
     FileChannel inChannel = inData.getChannel();
     long inSize = inChannel.size();
     ByteBuffer source = ByteBuffer.allocate((int) inSize);
     inChannel.read(source, 0);
     source.position(0);
     System.out.println("Original byte data:");
     for (int i = 0; source.remaining() > 0; i++) {
       System.out.print(source.get() + " ");
     }
     // convert byte data into character data
     source.position(0);
     Charset ascii = Charset.forName("US-ASCII");
     CharsetDecoder toAscii = ascii.newDecoder();
     CharBuffer destination = toAscii.decode(source);
     destination.position(0);
     System.out.println("\n\nNew character data:");
     for (int i = 0; destination.remaining() > 0; i++) {
       System.out.print(destination.get());
     }
     System.out.println();
   } catch (FileNotFoundException fne) {
     System.out.println(fne.getMessage());
   } catch (IOException ioe) {
     System.out.println(ioe.getMessage());
   }
 }
Ejemplo n.º 4
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  public static void runTests() {
    try {

      // SHA1 sha1Jmule = new SHA1();
      MessageDigest sha1Sun = MessageDigest.getInstance("SHA-1");
      SHA1 sha1Gudy = new SHA1();
      // SHA1Az shaGudyResume = new SHA1Az();

      ByteBuffer buffer = ByteBuffer.allocate(1024 * 1024);

      File dir = new File(dirname);
      File[] files = dir.listFiles();

      for (int i = 0; i < files.length; i++) {
        FileChannel fc = new RandomAccessFile(files[i], "r").getChannel();

        System.out.println("Testing " + files[i].getName() + " ...");

        while (fc.position() < fc.size()) {
          fc.read(buffer);
          buffer.flip();

          byte[] raw = new byte[buffer.limit()];
          System.arraycopy(buffer.array(), 0, raw, 0, raw.length);

          sha1Gudy.update(buffer);
          sha1Gudy.saveState();
          ByteBuffer bb = ByteBuffer.wrap(new byte[56081]);
          sha1Gudy.digest(bb);
          sha1Gudy.restoreState();

          sha1Sun.update(raw);

          buffer.clear();
        }

        byte[] sun = sha1Sun.digest();
        sha1Sun.reset();

        byte[] gudy = sha1Gudy.digest();
        sha1Gudy.reset();

        if (Arrays.equals(sun, gudy)) {
          System.out.println("  SHA1-Gudy: OK");
        } else {
          System.out.println("  SHA1-Gudy: FAILED");
        }

        buffer.clear();
        fc.close();
        System.out.println();
      }

    } catch (Throwable e) {
      Debug.printStackTrace(e);
    }
  }
Ejemplo n.º 5
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 public static void main(String[] args) throws Exception {
   if (args.length != 2) {
     System.out.println("arguments: sourcefile destfile");
     System.exit(1);
   }
   FileChannel in = new FileInputStream(args[0]).getChannel(),
       out = new FileOutputStream(args[1]).getChannel();
   in.transferTo(0, in.size(), out);
   // Or:
   // out.transferFrom(in, 0, in.size());
 }
Ejemplo n.º 6
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  /**
   * Read the contents of a text file using a memory-mapped byte buffer.
   *
   * <p>A MappedByteBuffer, is simply a special ByteBuffer. MappedByteBuffer maps a region of a file
   * directly in memory. Typically, that region comprises the entire file, although it could map a
   * portion. You must, therefore, specify what part of the file to map. Moreover, as with the other
   * Buffer objects, no constructor exists; you must ask the java.nio.channels.FileChannel for its
   * map() method to get a MappedByteBuffer.
   *
   * <p>Direct buffers allocate their data directly in the runtime environment memory, bypassing the
   * JVM|OS boundary, usually doubling file copy speed. However, they generally cost more to
   * allocate.
   */
  private static String fastStreamCopy(String filename) {
    String s = "";
    FileChannel fc = null;
    try {
      fc = new FileInputStream(filename).getChannel();

      // int length = (int)fc.size();

      MappedByteBuffer byteBuffer = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
      // CharBuffer charBuffer =
      // Charset.forName("ISO-8859-1").newDecoder().decode(byteBuffer);

      // ByteBuffer byteBuffer = ByteBuffer.allocate(length);
      // ByteBuffer byteBuffer = ByteBuffer.allocateDirect(length);
      // CharBuffer charBuffer = byteBuffer.asCharBuffer();

      // CharBuffer charBuffer =
      // ByteBuffer.allocateDirect(length).asCharBuffer();
      /*
       * int size = charBuffer.length(); if (size > 0) { StringBuffer sb =
       * new StringBuffer(size); for (int count=0; count<size; count++)
       * sb.append(charBuffer.get()); s = sb.toString(); }
       *
       * if (length > 0) { StringBuffer sb = new StringBuffer(length); for
       * (int count=0; count<length; count++) {
       * sb.append(byteBuffer.get()); } s = sb.toString(); }
       */
      int size = byteBuffer.capacity();
      if (size > 0) {
        // Retrieve all bytes in the buffer
        byteBuffer.clear();
        byte[] bytes = new byte[size];
        byteBuffer.get(bytes, 0, bytes.length);
        s = new String(bytes);
      }

      fc.close();
    } catch (FileNotFoundException fnfx) {
      System.err.println("File not found: " + fnfx);
    } catch (IOException iox) {
      System.err.println("I/O problems: " + iox);
    } finally {
      if (fc != null) {
        try {
          fc.close();
        } catch (IOException ignore) {
          // ignore
        }
      }
    }
    return s;
  }
Ejemplo n.º 7
0
  public static long checksumMappedFile(Path filename) throws IOException {
    try (FileChannel channel = FileChannel.open(filename)) {
      CRC32 crc = new CRC32();
      int length = (int) channel.size();
      MappedByteBuffer buffer = channel.map(FileChannel.MapMode.READ_ONLY, 0, length);

      for (int p = 0; p < length; p++) {
        int c = buffer.get(p);
        crc.update(c);
      }
      return crc.getValue();
    }
  }
Ejemplo n.º 8
0
  public RandomAccessFile delete(RandomAccessFile raf, RandomAccessFile tempRaf)
      throws IOException {
    FileChannel fc = raf.getChannel();
    fc.position(0);

    if (!tagExists(fc)) return raf;

    fc.position(6);

    ByteBuffer b = ByteBuffer.allocate(4);
    fc.read(b);
    b.rewind();

    int tagSize = (b.get() & 0xFF) << 21;
    tagSize += (b.get() & 0xFF) << 14;
    tagSize += (b.get() & 0xFF) << 7;
    tagSize += b.get() & 0xFF;

    FileChannel tempFC = tempRaf.getChannel();
    tempFC.position(0);

    fc.position(tagSize + 10);

    // Here we will try to skip eventual trash afer the tag and before the
    // audio data
    b = ByteBuffer.allocate(4);
    int skip = 0;
    while (fc.read(b) != -1) {
      if ((b.get(0) & 0xFF) == 0xFF
          && (b.get(1) & 0xE0) == 0xE0
          && (b.get(1) & 0x06) != 0
          && (b.get(2) & 0xF0) != 0xF0
          && (b.get(2) & 0x08) != 0x08) {
        fc.position(fc.position() - 4);
        break;
      }

      fc.position(fc.position() - 3);
      b.rewind();
      skip++;
    }

    tempFC.transferFrom(fc, 0, fc.size() - tagSize - 10 - skip);
    return tempRaf;
  }
Ejemplo n.º 9
0
 /**
  * copies file "in" to file "out"
  *
  * @param in
  * @param out
  * @throws java.io.IOException
  */
 public static boolean copy(File in, File out) {
   Boolean returnVal = true;
   try {
     FileChannel inChannel = new FileInputStream(in).getChannel();
     FileChannel outChannel = new FileOutputStream(out).getChannel();
     try {
       inChannel.transferTo(0, inChannel.size(), outChannel);
     } catch (IOException e) {
       returnVal = false;
     } finally {
       if (inChannel != null) inChannel.close();
       if (outChannel != null) outChannel.close();
     }
   } catch (Exception ea) {
     returnVal = false;
   }
   return returnVal;
 }
Ejemplo n.º 10
0
  public static void copyFileNIO(String filenameIn, String filenameOut, long kbchunks)
      throws IOException {

    FileInputStream in = new FileInputStream(filenameIn);
    FileChannel inChannel = in.getChannel();

    FileOutputStream out = new FileOutputStream(filenameOut);
    FileChannel outChannel = out.getChannel();

    long size = inChannel.size();
    // outChannel.position(size-2);
    // outChannel.write(ByteBuffer.allocate(1));
    // outChannel.position(0);

    if (debug)
      System.out.println(
          "read " + filenameIn + " len = " + size + " out starts at=" + outChannel.position());

    long start = System.currentTimeMillis();
    long done = 0;
    while (done < size) {
      long need = Math.min(kbchunks * 1000, size - done);
      done += inChannel.transferTo(done, need, outChannel);
    }

    outChannel.close();
    inChannel.close();

    double took = .001 * (System.currentTimeMillis() - start);
    if (debug) System.out.println(" write file= " + filenameOut + " len = " + size);

    double rate = size / took / (1000 * 1000);
    System.out.println(
        " copyFileNIO("
            + kbchunks
            + " kb chunk) took = "
            + took
            + " sec; rate = "
            + rate
            + "Mb/sec");
  }
Ejemplo n.º 11
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  /*
   * Method used to move a file from sourceFile to destFile
   */
  public static void moveFile(File sourceFile, File destFile) throws IOException {
    FileChannel source = null;
    FileChannel destination = null;

    try {
      source = new FileInputStream(sourceFile).getChannel();
      destination = new FileOutputStream(destFile).getChannel();

      long count = 0;
      long size = source.size();
      source.transferTo(count, size, destination);
    } finally {
      if (source != null) {
        source.close();
      }

      if (destination != null) {
        destination.close();
      }
    }
  }
Ejemplo n.º 12
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  public static void main(String[] argv) {
    if (argv.length != 3) {
      usage();
    }

    String tempFile = argv[0];
    String testFile = argv[1];
    int fileSize = Integer.valueOf(argv[2]).intValue();
    int exitcode = 0;
    int numRead;
    int numThisBuf;
    int numWritten;

    if ((fileSize <= 0) || (fileSize % 4096 != 0)) {
      System.out.println("Error: size is not a multiple of 4096!!!!!!");
      System.out.println();
      usage();
    }

    try {
      int bufSize = 4096;
      byte[] inBytes = new byte[bufSize];
      byte[] outBytes = new byte[bufSize];
      Random ioRandom = new Random(2006);
      ioRandom.nextBytes(outBytes);
      ByteBuffer inBuf = ByteBuffer.allocate(bufSize);
      ByteBuffer outBuf = ByteBuffer.wrap(outBytes);

      //
      // Loop forever
      //
      while (true) {
        //
        // Write the temporary file
        //
        FileOutputStream fos = new FileOutputStream(tempFile);
        FileChannel foc = fos.getChannel();
        numWritten = 0;
        while (numWritten < fileSize) {
          outBuf.clear(); // sets limit to capacity & position to zero
          while (outBuf.hasRemaining()) {
            numWritten += foc.write(outBuf);
          }
        }

        //
        // Move to permanent location
        //
        FileChannel srcChannel = new FileInputStream(tempFile).getChannel();
        FileChannel dstChannel = new FileOutputStream(testFile).getChannel();
        dstChannel.transferFrom(srcChannel, 0, srcChannel.size());
        srcChannel.close();
        dstChannel.close();
        boolean success = (new File(tempFile)).delete();
        if (!success) {
          System.out.println("Warning: unable to delete temporary file");
        }

        //
        // Read and compare
        //
        FileInputStream fis = new FileInputStream(testFile);
        FileChannel fic = fis.getChannel();

        for (numRead = 0, numThisBuf = 0; numRead < fileSize; numThisBuf = 0) {
          inBuf.rewind(); // Set the buffer position to 0
          numThisBuf = fic.read(inBuf);
          while (numThisBuf < bufSize) {
            numThisBuf += fic.read(inBuf);
          }
          numRead += bufSize;
          inBuf.rewind(); // Set the buffer position to 0
          inBuf.get(inBytes);
          boolean same = Arrays.equals(inBytes, outBytes);
          if (same = false) {
            System.out.println("Data read does not equal data written at " + numRead + " bytes");
          }
        }
      }

    } catch (FileNotFoundException fnfe) {
      fnfe.printStackTrace(System.err);
      exitcode = 1;
      // break;
    } catch (SecurityException se) {
      se.printStackTrace(System.err);
      exitcode = 1;
      // break;
    } catch (Throwable t) {
      t.printStackTrace(System.err);
      exitcode = 1;
    }

    System.exit(exitcode);
  }
Ejemplo n.º 13
0
  /** Test exceptions specified by map method */
  private static void testExceptions() throws Exception {
    // check exceptions when channel opened for read access
    try (FileChannel fc = FileChannel.open(blah.toPath(), READ)) {
      testExceptions(fc);

      checkException(fc, MapMode.READ_WRITE, 0L, fc.size(), NonWritableChannelException.class);

      checkException(
          fc,
          MapMode.READ_WRITE,
          -1L,
          fc.size(),
          NonWritableChannelException.class,
          IllegalArgumentException.class);

      checkException(
          fc,
          MapMode.READ_WRITE,
          0L,
          -1L,
          NonWritableChannelException.class,
          IllegalArgumentException.class);

      checkException(fc, MapMode.PRIVATE, 0L, fc.size(), NonWritableChannelException.class);

      checkException(
          fc,
          MapMode.PRIVATE,
          -1L,
          fc.size(),
          NonWritableChannelException.class,
          IllegalArgumentException.class);

      checkException(
          fc,
          MapMode.PRIVATE,
          0L,
          -1L,
          NonWritableChannelException.class,
          IllegalArgumentException.class);
    }

    // check exceptions when channel opened for write access
    try (FileChannel fc = FileChannel.open(blah.toPath(), WRITE)) {
      testExceptions(fc);

      checkException(fc, MapMode.READ_ONLY, 0L, fc.size(), NonReadableChannelException.class);

      checkException(
          fc,
          MapMode.READ_ONLY,
          -1L,
          fc.size(),
          NonReadableChannelException.class,
          IllegalArgumentException.class);

      /*
       * implementation/spec mismatch, these tests disabled for now
       */
      // checkException(fc, MapMode.READ_WRITE, 0L, fc.size(),
      //               NonWritableChannelException.class);
      // checkException(fc, MapMode.PRIVATE, 0L, fc.size(),
      //               NonWritableChannelException.class);
    }

    // check exceptions when channel opened for read and write access
    try (FileChannel fc = FileChannel.open(blah.toPath(), READ, WRITE)) {
      testExceptions(fc);
    }
  }
Ejemplo n.º 14
0
 public void prepare() throws IOException {
   if (fc == null) fc = new RandomAccessFile(fn, "r").getChannel();
   length = fc.size();
   position = 0; // NB only
 }