Examples of java.nio.channels.FileChannel.map()

java.nio.channels.FileChannel.map()
Maps the file into memory.There can be three modes:Read-only,Read/write and Private. After mapping, the memory and the file channel do not affect each other. Note : mapping a file into memory is usually expensive. @param mode one of three modes to map @param position the starting position of the file @param size the size to map @return the mapped byte buffer @throws NonReadableChannelException If the file is not opened for reading but the given mode is "READ_ONLY" @throws NonWritableChannelException If the file is not opened for writing but the mode is not "READ_ONLY" @throws IllegalArgumentException If the given parameters of position and size are not correct @throws IOException If any I/O error occurs

      long size) throws IOException {
    FileChannel channel = raf.getChannel();


    boolean threw = true;
    try {
      MappedByteBuffer mbb = channel.map(mode, 0, size);
      threw = false;
      return mbb;
    } finally {
      Closeables.close(channel, threw);
    }

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                            length = 4096;
                        } else {
                            length = remaining;
                        }
                        
                        MappedByteBuffer buffer = fc.map(MapMode.READ_ONLY, offset, length);
                        ByteBuffer[] bufs = new ByteBuffer[] { buffer };
                  
                        outChannel.write(bufs, this);
                            
                        offset += length;

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                            length = 4096;
                        } else {
                            length = remaining;
                        }
                        
                        MappedByteBuffer buffer = fc.map(MapMode.READ_ONLY, offset, length);
                        ByteBuffer[] bufs = new ByteBuffer[] { buffer };
                  
                        outChannel.write(bufs, this);
                            
                        offset += length;

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                            length = 4096;
                        } else {
                            length = remaining;
                        }
                        
                        MappedByteBuffer buffer = fc.map(MapMode.READ_ONLY, offset, length);
                        ByteBuffer[] bufs = new ByteBuffer[] { buffer };
                  
                        outChannel.write(bufs, this);
                            
                        offset += length;

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                            length = 4096;
                        } else {
                            length = remaining;
                        }
                        
                        MappedByteBuffer buffer = fc.map(MapMode.READ_ONLY, offset, length);
                        ByteBuffer[] bufs = new ByteBuffer[] { buffer };
                  
                        outChannel.write(bufs, this);
                            
                        offset += length;

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  private String readFile(String path) throws IOException {
    FileInputStream stream = new FileInputStream(new File(path));
    try {
      FileChannel fc = stream.getChannel();
      MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc
          .size());
      /* Instead of using default, pass in a decoder. */
      return Charset.forName("ISO-8859-1").decode(bb).toString();
    } finally {
      stream.close();

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  private String readFile(String path) throws IOException {
    FileInputStream stream = new FileInputStream(new File(path));
    try {
      FileChannel fc = stream.getChannel();
      MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc
          .size());
      /* Instead of using default, pass in a decoder. */
      return Charset.forName("ISO-8859-1").decode(bb).toString();
    } finally {
      stream.close();

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            }
            in = new FileInputStream(source).getChannel();
            out = new FileOutputStream(dest).getChannel();


            long size = in.size();
            MappedByteBuffer buf = in.map(FileChannel.MapMode.READ_ONLY, 0, size);


            out.write(buf);


        } finally {
            if (in != null) {

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        boolean capped = false;
        int lineCount = 0;
        try {
            RandomAccessFile raf = new RandomAccessFile(file, "r");
            FileChannel fc = raf.getChannel();
            MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
            CharBuffer cb = Charset.forName(System.getProperty("file.encoding")).decode(bb);
            Matcher target = null;
            Matcher any = null;
            Matcher lines = FULL_LINE_PATTERN.matcher(cb);
            Matcher text = textSearch == null ? null : textSearch.matcher("");

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                       || (start>0 && start<=logFileTime && end>0 && end>=logFileTime)) {


                        // It's in the range, so process the file
                        RandomAccessFile raf = new RandomAccessFile(logFiles[i], "r");
                        FileChannel fc = raf.getChannel();
                        MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
                        CharBuffer cb = Charset.forName("US-ASCII").decode(bb); //todo: does Jetty use a different charset on a foreign PC?
                        Matcher lines = FULL_LINE_PATTERN.matcher(cb);
                        Matcher target = ACCESS_LOG_PATTERN.matcher("");
                        SimpleDateFormat format = (start == 0 && end == 0) ? null : new SimpleDateFormat(ACCESS_LOG_DATE_FORMAT);
                        int max = maxResults == null ? MAX_SEARCH_RESULTS : Math.min(maxResults.intValue(), MAX_SEARCH_RESULTS);

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