예제 #1
0
  public static void main(String args[]) throws Exception {
    String inputFile = "samplein.txt";
    String outputFile = "sampleout.txt";

    RandomAccessFile inf = new RandomAccessFile(inputFile, "r");
    RandomAccessFile outf = new RandomAccessFile(outputFile, "rw");
    long inputLength = new File(inputFile).length();

    FileChannel inc = inf.getChannel();
    FileChannel outc = outf.getChannel();

    MappedByteBuffer inputData = inc.map(FileChannel.MapMode.READ_ONLY, 0, inputLength);

    Charset latin1 = Charset.forName("ISO-8859-1");
    CharsetDecoder decoder = latin1.newDecoder();
    CharsetEncoder encoder = latin1.newEncoder();

    CharBuffer cb = decoder.decode(inputData);

    // Process char data here

    ByteBuffer outputData = encoder.encode(cb);

    outc.write(outputData);

    inf.close();
    outf.close();
  }
예제 #2
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  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);
    }
  }
예제 #3
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  private void merge(SingleHit[] hits, String prefix, int chrom) throws IOException {
    String postmp = getPositionsFname(prefix, chrom) + ".tmp";
    String weightstmp = getWeightsFname(prefix, chrom) + ".tmp";
    String lastmp = getLaSFname(prefix, chrom) + ".tmp";
    RandomAccessFile positionsRAF = new RandomAccessFile(postmp, "rw");
    RandomAccessFile weightsRAF = new RandomAccessFile(weightstmp, "rw");
    RandomAccessFile lasRAF = new RandomAccessFile(lastmp, "rw");
    int newsize = getPositionsBuffer().limit() + hits.length;
    IntBP posfile =
        new IntBP(positionsRAF.getChannel().map(FileChannel.MapMode.READ_WRITE, 0, newsize * 4));
    FloatBP weightfile =
        new FloatBP(weightsRAF.getChannel().map(FileChannel.MapMode.READ_WRITE, 0, newsize * 4));
    IntBP lasfile =
        new IntBP(lasRAF.getChannel().map(FileChannel.MapMode.READ_WRITE, 0, newsize * 4));

    int oldp = 0;
    int newp = 0;
    int pos = 0;
    IntBP oldpositions = getPositionsBuffer();
    FloatBP oldweights = getWeightsBuffer();
    IntBP oldlas = getLASBuffer();
    while (oldp < oldpositions.limit() || newp < hits.length) {
      while (newp < hits.length
          && (oldp == oldpositions.limit() || hits[newp].pos <= oldpositions.get(oldp))) {
        posfile.put(pos, hits[newp].pos);
        weightfile.put(pos, hits[newp].weight);
        lasfile.put(pos, Hits.makeLAS(hits[newp].length, hits[newp].strand));
        newp++;
        pos++;
      }
      while (oldp < oldpositions.limit()
          && (newp == hits.length || oldpositions.get(oldp) <= hits[newp].pos)) {
        posfile.put(pos, oldpositions.get(oldp));
        weightfile.put(pos, oldweights.get(oldp));
        lasfile.put(pos, oldlas.get(oldp));
        oldp++;
        pos++;
      }
      //            System.err.println(String.format("%d %d %d", pos, newp, oldp));
    }
    posfile = null;
    weightfile = null;
    lasfile = null;
    oldpositions = null;
    oldweights = null;
    oldlas = null;
    positionsRAF.close();
    weightsRAF.close();
    lasRAF.close();
    /* ideally this part with the renames would atomic... */
    (new File(postmp)).renameTo(new File(getPositionsFname(prefix, chrom)));
    (new File(weightstmp)).renameTo(new File(getWeightsFname(prefix, chrom)));
    (new File(lastmp)).renameTo(new File(getLaSFname(prefix, chrom)));
  }
예제 #4
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  public void resort(String prefix, int chrom) throws IOException {
    IntBP positions = getPositionsBuffer();
    FloatBP weights = getWeightsBuffer();
    IntBP las = getLASBuffer();
    long indices[] = new long[positions.limit()];
    for (int i = 0; i < indices.length; i++) {
      long v = positions.get(i);
      v <<= 32;
      v |= i;
      indices[i] = v;
    }
    Arrays.sort(indices);

    String postmp = getPositionsFname(prefix, chrom) + ".tmp";
    String weightstmp = getWeightsFname(prefix, chrom) + ".tmp";
    String lastmp = getLaSFname(prefix, chrom) + ".tmp";
    RandomAccessFile positionsRAF = new RandomAccessFile(postmp, "rw");
    RandomAccessFile weightsRAF = new RandomAccessFile(weightstmp, "rw");
    RandomAccessFile lasRAF = new RandomAccessFile(lastmp, "rw");
    int newsize = getPositionsBuffer().limit();
    IntBP posfile =
        new IntBP(positionsRAF.getChannel().map(FileChannel.MapMode.READ_WRITE, 0, newsize * 4));
    FloatBP weightfile =
        new FloatBP(weightsRAF.getChannel().map(FileChannel.MapMode.READ_WRITE, 0, newsize * 4));
    IntBP lasfile =
        new IntBP(lasRAF.getChannel().map(FileChannel.MapMode.READ_WRITE, 0, newsize * 4));

    for (int i = 0; i < indices.length; i++) {
      int index = (int) (indices[i] & 0xffffffffL);
      int pos = (int) (indices[i] >> 32);
      posfile.put(i, pos);
      weightfile.put(i, weights.get(index));
      lasfile.put(i, las.get(index));
    }
    posfile = null;
    weightfile = null;
    lasfile = null;
    positionsRAF.close();
    weightsRAF.close();
    lasRAF.close();
    /* ideally this part with the renames would atomic... */
    (new File(postmp)).renameTo(new File(getPositionsFname(prefix, chrom)));
    (new File(weightstmp)).renameTo(new File(getWeightsFname(prefix, chrom)));
    (new File(lastmp)).renameTo(new File(getLaSFname(prefix, chrom)));
  }
예제 #5
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;
  }
예제 #6
0
  /**
   * Creates and initializes an SPV block store. Will create the given file if it's missing. This
   * operation will block on disk.
   */
  public SPVBlockStore(NetworkParameters params, File file) throws BlockStoreException {
    checkNotNull(file);
    this.params = checkNotNull(params);
    try {
      this.numHeaders = DEFAULT_NUM_HEADERS;
      boolean exists = file.exists();
      // Set up the backing file.
      randomAccessFile = new RandomAccessFile(file, "rw");
      long fileSize = getFileSize();
      if (!exists) {
        log.info("Creating new SPV block chain file " + file);
        randomAccessFile.setLength(fileSize);
      } else if (randomAccessFile.length() != fileSize) {
        throw new BlockStoreException(
            "File size on disk does not match expected size: "
                + randomAccessFile.length()
                + " vs "
                + fileSize);
      }

      FileChannel channel = randomAccessFile.getChannel();
      fileLock = channel.tryLock();
      if (fileLock == null)
        throw new BlockStoreException("Store file is already locked by another process");

      // Map it into memory read/write. The kernel will take care of flushing writes to disk at the
      // most
      // efficient times, which may mean that until the map is deallocated the data on disk is
      // randomly
      // inconsistent. However the only process accessing it is us, via this mapping, so our own
      // view will
      // always be correct. Once we establish the mmap the underlying file and channel can go away.
      // Note that
      // the details of mmapping vary between platforms.
      buffer = channel.map(FileChannel.MapMode.READ_WRITE, 0, fileSize);

      // Check or initialize the header bytes to ensure we don't try to open some random file.
      byte[] header;
      if (exists) {
        header = new byte[4];
        buffer.get(header);
        if (!new String(header, "US-ASCII").equals(HEADER_MAGIC))
          throw new BlockStoreException("Header bytes do not equal " + HEADER_MAGIC);
      } else {
        initNewStore(params);
      }
    } catch (Exception e) {
      try {
        if (randomAccessFile != null) randomAccessFile.close();
      } catch (IOException e2) {
        throw new BlockStoreException(e2);
      }
      throw new BlockStoreException(e);
    }
  }
예제 #7
0
  public static void writeSingleHits(
      IntBP positions, FloatBP weights, IntBP las, String prefix, int chrom) throws IOException {
    String postmp = getPositionsFname(prefix, chrom) + ".tmp";
    String weightstmp = getWeightsFname(prefix, chrom) + ".tmp";
    String lastmp = getLaSFname(prefix, chrom) + ".tmp";
    RandomAccessFile positionsRAF = new RandomAccessFile(postmp, "rw");
    RandomAccessFile weightsRAF = new RandomAccessFile(weightstmp, "rw");
    RandomAccessFile lasRAF = new RandomAccessFile(lastmp, "rw");

    Bits.sendBytes(positions.bb, 0, positions.bb.limit(), positionsRAF.getChannel());
    Bits.sendBytes(weights.bb, 0, weights.bb.limit(), weightsRAF.getChannel());
    Bits.sendBytes(las.bb, 0, las.bb.limit(), lasRAF.getChannel());
    positionsRAF.close();
    weightsRAF.close();
    lasRAF.close();

    /* ideally this part with the renames would atomic... */
    (new File(postmp)).renameTo(new File(getPositionsFname(prefix, chrom)));
    (new File(weightstmp)).renameTo(new File(getWeightsFname(prefix, chrom)));
    (new File(lastmp)).renameTo(new File(getLaSFname(prefix, chrom)));
  }
  private void readPalette() {
    RandomAccessFile rIn = null;
    ByteBuffer buf = null;
    int i;
    try {
      if (paletteFile != null) {
        // see if the file exists, if not, set it to the default palette.
        File file = new File(paletteFile);

        numPaletteEntries = (int) (file.length() / 4);

        buf = ByteBuffer.allocate(numPaletteEntries * 4);

        rIn = new RandomAccessFile(paletteFile, "r");

        FileChannel inChannel = rIn.getChannel();

        inChannel.position(0);
        inChannel.read(buf);

        // Check the byte order.
        buf.order(ByteOrder.LITTLE_ENDIAN);

        buf.rewind();
        IntBuffer ib = buf.asIntBuffer();
        paletteData = new int[numPaletteEntries];
        ib.get(paletteData);
        ib = null;
      }

    } catch (Exception e) {
      System.err.println("Caught exception: " + e.toString());
      System.err.println(e.getStackTrace());
    } finally {
      if (rIn != null) {
        try {
          rIn.close();
        } catch (Exception e) {
        }
      }
    }
  }
예제 #9
0
  /** @param args */
  public static void main(String[] args) {
    FileChannel fc = null;
    RandomAccessFile raf = null;
    // StringBuilder sb;

    if (args.length != 1) {
      System.out.println("Usage: Ntfs filename");
      System.exit(1);
    }
    /*
    sb = new StringBuilder();
    int[] foo = {129,4,229,33};
    for (int b: foo) {
        sb.insert(0,String.format("%02X", b));
    }
    System.out.println(sb.toString());
    System.exit(0);
    */
    try {
      raf = new RandomAccessFile(args[0], "r");
      fc = raf.getChannel();
      Filesystem fs = new Filesystem(fc);

      fs.demo();
      // fs.displayFs();
    } catch (FileNotFoundException x) {
      System.out.println("FNF exp: " + x.getMessage());
    } catch (IOException x) {
      System.out.println("IO exp: " + x.getMessage());
    } finally {
      if (raf != null)
        try {
          raf.close();
        } catch (IOException e) {
          e.printStackTrace(); // To change body of catch statement use File | Settings | File
          // Templates.
        }
    }
  }
예제 #10
0
  /**
   * Decode file charset.
   *
   * @param f File to process.
   * @return File charset.
   * @throws IOException in case of error.
   */
  public static Charset decode(File f) throws IOException {
    SortedMap<String, Charset> charsets = Charset.availableCharsets();

    String[] firstCharsets = {
      Charset.defaultCharset().name(), "US-ASCII", "UTF-8", "UTF-16BE", "UTF-16LE"
    };

    Collection<Charset> orderedCharsets = U.newLinkedHashSet(charsets.size());

    for (String c : firstCharsets)
      if (charsets.containsKey(c)) orderedCharsets.add(charsets.get(c));

    orderedCharsets.addAll(charsets.values());

    try (RandomAccessFile raf = new RandomAccessFile(f, "r")) {
      FileChannel ch = raf.getChannel();

      ByteBuffer buf = ByteBuffer.allocate(4096);

      ch.read(buf);

      buf.flip();

      for (Charset charset : orderedCharsets) {
        CharsetDecoder decoder = charset.newDecoder();

        decoder.reset();

        try {
          decoder.decode(buf);

          return charset;
        } catch (CharacterCodingException ignored) {
        }
      }
    }

    return Charset.defaultCharset();
  }