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

java.nio.channels.FileChannel.transferTo()
Transfers data from the file to the given channel. It may be very efficient. By invoking this methid, it will read form the file and write into the writable channel. Note: no guarantee whether all bytes may be transfered.And it does not modify the position of the channel. @param position the non-negative position to begin @param count the non-negative bytes to be transferred @param target the target channel to write into @return the number of bytes that were transferred. @throws IllegalArgumentException If the parameters are not correct @throws NonReadableChannelException If this channel is not readable @throws NonWritableChannelException If the target channel is not writable @throws ClosedChannelException If either channel has already been closed @throws AsynchronousCloseException If either channel is closed by other threads during this operation @throws ClosedByInterruptException If the thread is interrupted during this operation @throws IOException If any I/O error occurs


    public static String read(File file, String encoding) throws IOException {
        FileChannel in = new FileInputStream(file).getChannel();
        try {
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            in.transferTo(0, in.size(), Channels.newChannel(baos));
            return baos.toString(encoding);
        } finally {
            in.close();
        }
    }

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              wrapped = in;
            }
            
            if (wrapped instanceof FileInputStream) {
                FileChannel fileChannel = ((FileInputStream)wrapped).getChannel();
                fileChannel.transferTo(skipped, fileChannel.size(), channel);
                fileChannel.close();
            } else {
                int i = 0;


                // read all the content of the underlying InputStream in 16384 byte chunks, wrap them

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                        condition_.await();
                    }
                }
                
                /* returns the number of bytes transferred from file to the socket */
                long bytesTransferred = fc.transferTo(startPosition, limit, socketChannel_);
                if (logger_.isDebugEnabled())
                    logger_.debug("Bytes transferred " + bytesTransferred);                
                bytesWritten += bytesTransferred;
                startPosition += bytesTransferred; 
                /*

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            wbc = Channels.newChannel(out);


            long count    = 0;
            int attempts  = 0;
            while (count < sz) {
                long written = fc.transferTo(count, sz, wbc);
                count += written;


                if (written == 0) {
                    attempts++;
                    if (attempts > 100) {

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                out = Channels.newChannel(os);
            }
            FileChannel fc = s.getChannel();
            long pos = 0;
            while (pos < len) {
                long i = fc.transferTo(pos, len - pos, out);
                pos += i;
            }
            s.close();
        } else {
            IOHelper.copy(getInputStream(), os);

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        int safe_max = (64 * 1024 * 1024) / 4;
        long size = srcChannel.size();
        long position = 0;
        while (position < size)
        {
          position += srcChannel.transferTo(position, safe_max,
              dstChannel);
        }
      }


      // Close the channels

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            File fileServer = new File(Constants.PHOTO_DIR + personId + ".jpg");
            if(!fileServer.exists()) {
              fileServer.createNewFile();
            }
          
          in.transferTo(0, in.size(), new FileOutputStream(fileServer).getChannel());
    } catch (FileNotFoundException e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();
    }

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            File fileServer = new File(Constants.PHOTO_DIR + personId + ".jpg");
            if(!fileServer.exists()) {
              fileServer.createNewFile();
            }
          
          in.transferTo(0, in.size(), new FileOutputStream(fileServer).getChannel());
          in.close();
    } catch (FileNotFoundException e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();

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                     File fileServer = new File(Constants.DOWNLOAD_DIR +  fileDescriptor.getName());
                     if(!fileServer.exists()) {
                       fileServer.createNewFile();
                     }
                   
                   inFileChannel.transferTo(0, inFileChannel.size(), new FileOutputStream(fileServer).getChannel());
                   
                   inFileChannel.close();
                 }
            }

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                {
                    int toTransfer = (int) Math.min(CHUNK_SIZE, length - bytesTransferred);
                    long lastWrite;
                    if (sc != null)
                    {
                        lastWrite = fc.transferTo(section.left + bytesTransferred, toTransfer, sc);
                        throttle.throttleDelta(lastWrite);
                    }
                    else
                    {
                        // NIO is not available. Fall back to normal streaming.

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