Android Open Source - makler Channel Tools

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License

The source code is released under:

GNU General Public License

Java Source Code

package pl.net.newton.Makler.history;
/* w ww .java 2 s.  c  om*/
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.nio.channels.Channels;
import java.nio.channels.ReadableByteChannel;
import java.nio.channels.WritableByteChannel;

public final class ChannelTools {
  private ChannelTools() {
  }

  public static void fastChannelCopy(final ReadableByteChannel src, final WritableByteChannel dest)
      throws IOException {
    final ByteBuffer buffer = ByteBuffer.allocateDirect(16 * 1024);
    while (src.read(buffer) != -1) {
      // prepare the buffer to be drained
      buffer.flip();
      // write to the channel, may block
      dest.write(buffer);
      // If partial transfer, shift remainder down
      // If buffer is empty, same as doing clear()
      buffer.compact();
    }
    // EOF will leave buffer in fill state
    buffer.flip();
    // make sure the buffer is fully drained.
    while (buffer.hasRemaining()) {
      dest.write(buffer);
    }
  }

  public static void copy(InputStream is, OutputStream os) throws IOException {
    final ReadableByteChannel inputChannel = Channels.newChannel(is);
    final WritableByteChannel outputChannel = Channels.newChannel(os);
    // copy the channels
    ChannelTools.fastChannelCopy(inputChannel, outputChannel);
    // closing the channels
    inputChannel.close();
    outputChannel.close();
  }
}

Java Source Code List

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