content: /*
   * Copyright (c) 2008-2009, Motorola, Inc.
   *
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *
   * - Redistributions of source code must retain the above copyright notice,
   * this list of conditions and the following disclaimer.
   *
   * - Redistributions in binary form must reproduce the above copyright notice,
   * this list of conditions and the following disclaimer in the documentation
   * and/or other materials provided with the distribution.
   *
   * - Neither the name of the Motorola, Inc. nor the names of its contributors
   * may be used to endorse or promote products derived from this software
   * without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   */
  
  package javax.obex;
  
  import java.io.IOException;
  import java.io.OutputStream;
  import java.io.ByteArrayOutputStream;
  
  /**
   * This object provides an output stream to the Operation objects used in this
   * package.
   * @hide
   */
  public final class PrivateOutputStream extends OutputStream {
  
      private BaseStream mParent;
  
      private ByteArrayOutputStream mArray;
  
      private boolean mOpen;
  
      private int mMaxPacketSize;
  
      /**
       * Creates an empty <code>PrivateOutputStream</code> to write to.
       * @param p the connection that this stream runs over
       */
      public PrivateOutputStream(BaseStream p, int maxSize) {
          mParent = p;
          mArray = new ByteArrayOutputStream();
          mMaxPacketSize = maxSize;
          mOpen = true;
      }
  
      /**
       * Determines how many bytes have been written to the output stream.
       * @return the number of bytes written to the output stream
       */
      public int size() {
          return mArray.size();
      }
  
      /**
       * Writes the specified byte to this output stream. The general contract for
       * write is that one byte is written to the output stream. The byte to be
       * written is the eight low-order bits of the argument b. The 24 high-order
       * bits of b are ignored.
       * @param b the byte to write
       * @throws IOException if an I/O error occurs
       */
      @Override
      public synchronized void write(int b) throws IOException {
          ensureOpen();
          mParent.ensureNotDone();
          mArray.write(b);
          if (mArray.size() == mMaxPacketSize) {
              mParent.continueOperation(true, false);
          }
      }
  
      @Override
      public void write(byte[] buffer) throws IOException {
          write(buffer, 0, buffer.length);
      }
  
      @Override
      public synchronized void write(byte[] buffer, int offset, int count) throws IOException {
          int offset1 = offset;
          int remainLength = count;
  
          if (buffer == null) {
              throw new IOException("buffer is null");
          }
          if ((offset | count) < 0 || count > buffer.length - offset) {
              throw new IndexOutOfBoundsException("index outof bound");
          }
  
          ensureOpen();
          mParent.ensureNotDone();
          while ((mArray.size() + remainLength) >= mMaxPacketSize) {
              int bufferLeft = mMaxPacketSize - mArray.size();
              mArray.write(buffer, offset1, bufferLeft);
              offset1 += bufferLeft;
              remainLength -= bufferLeft;
              mParent.continueOperation(true, false);
          }
          if (remainLength > 0) {
              mArray.write(buffer, offset1, remainLength);
          }
      }
  
      /**
       * Reads the bytes that have been written to this stream.
       * @param size the size of the array to return
       * @return the byte array that is written
       */
      public synchronized byte[] readBytes(int size) {
          if (mArray.size() > 0) {
              byte[] temp = mArray.toByteArray();
              mArray.reset();
              byte[] result = new byte[size];
              System.arraycopy(temp, 0, result, 0, size);
              if (temp.length != size) {
                  mArray.write(temp, size, temp.length - size);
              }
              return result;
          } else {
              return null;
          }
      }
  
      /**
       * Verifies that this stream is open
       * @throws IOException if the stream is not open
       */
      private void ensureOpen() throws IOException {
          mParent.ensureOpen();
          if (!mOpen) {
              throw new IOException("Output stream is closed");
          }
      }
  
      /**
       * Closes the output stream. If the input stream is already closed, do
       * nothing.
       * @throws IOException this will never happen
       */
      @Override
      public void close() throws IOException {
          mOpen = false;
          mParent.streamClosed(false);
      }
  
      /**
       * Determines if the connection is closed
       * @return <code>true</code> if the connection is closed; <code>false</code>
       *         if the connection is open
       */
      public boolean isClosed() {
          return !mOpen;
      }
  }
  