bytesmessageimpl.java

来自「RESIN 3.2 最新源码」· Java 代码 · 共 765 行 · 第 1/2 页

      }
    } catch (JMSException e) {
      throw e;
    } catch (RuntimeException e) {
      throw e;
    } catch (Throwable e) {
      throw new JMSExceptionWrapper(e);
    }

    return cb.toString();
  }

  /**
   * Read a byte array object from the stream.
   */
  public int readBytes(byte []value)
    throws JMSException
  {
    ReadStream is = getReadStream();

    try {
      return is.read(value);
    } catch (IOException e) {
      throw new JMSExceptionWrapper(e);
    }
  }

  /**
   * Read a byte array object from the stream.
   */
  public int readBytes(byte []value, int length)
    throws JMSException
  {
    ReadStream is = getReadStream();

    try {
      return is.read(value, 0, length);
    } catch (IOException e) {
      throw new JMSExceptionWrapper(e);
    }
  }

  protected ReadStream getReadStream()
    throws JMSException
  {
    checkBodyReadable();

    /* ejb/6a87
    if (_rs == null)
      throw new MessageEOFException(L.l("bytes message may not be read"));
    */
      
    return _rs;
  }

  /**
   * Clears the message and puts it into write mode.
   */
  public void clearBody()
    throws JMSException
  {
    super.clearBody();
    
    _ws = null;
    _tempStream = null;
    _rs = null;
  }

  /**
   * Writes a boolean to the stream.
   */
  public void writeBoolean(boolean b)
    throws JMSException
  {
    try {
      getWriteStream().write(b ? 1 : 0);
    } catch (IOException e) {
      throw new JMSExceptionWrapper(e);
    }
  }

  /**
   * Writes a byte to the stream.
   */
  public void writeByte(byte b)
    throws JMSException
  {
    try {
      getWriteStream().write(b);
    } catch (IOException e) {
      throw new JMSExceptionWrapper(e);
    }
  }

  /**
   * Writes a short to the stream.
   */
  public void writeShort(short s)
    throws JMSException
  {
    try {
      WriteStream ws = getWriteStream();
    
      ws.write(s >> 8);
      ws.write(s);
    } catch (IOException e) {
      throw new JMSExceptionWrapper(e);
    }
  }

  /**
   * Writes an integer to the stream.
   */
  public void writeInt(int i)
    throws JMSException
  {
    try {
      WriteStream ws = getWriteStream();
    
      ws.write(i >> 24);
      ws.write(i >> 16);
      ws.write(i >> 8);
      ws.write(i);
    } catch (IOException e) {
      throw new JMSExceptionWrapper(e);
    }
  }

  /**
   * Writes a long to the stream.
   */
  public void writeLong(long l)
    throws JMSException
  {
    try {
      WriteStream ws = getWriteStream();
    
      ws.write((int) (l >> 56));
      ws.write((int) (l >> 48));
      ws.write((int) (l >> 40));
      ws.write((int) (l >> 32));
      ws.write((int) (l >> 24));
      ws.write((int) (l >> 16));
      ws.write((int) (l >> 8));
      ws.write((int) l);
    } catch (IOException e) {
      throw new JMSExceptionWrapper(e);
    }
  }

  /**
   * Writes a float to the stream.
   */
  public void writeFloat(float f)
    throws JMSException
  {
    int i = Float.floatToIntBits(f);
    writeInt(i);
  }

  /**
   * Writes a double to the stream.
   */
  public void writeDouble(double d)
    throws JMSException
  {
    long l = Double.doubleToLongBits(d);
    writeLong(l);
  }

  /**
   * Writes a string to the stream.
   */
  public void writeUTF(String s)
    throws JMSException
  {
    try {
      WriteStream out = getWriteStream();

      int len = s.length();

      int byteLength = 0;

      for (int i = 0; i < len; i++) {
        int ch = s.charAt(0);

        if (ch == 0)
          byteLength += 2;
        else if (ch < 0x80)
          byteLength += 1;
        else if (ch < 0x800)
          byteLength += 2;
        else
          byteLength += 3;
      }

      out.write(byteLength >> 8);
      out.write(byteLength);

      for (int i = 0; i < len; i++) {
        int ch = s.charAt(i);

        if (ch == 0) {
          out.write(0xc0);
          out.write(0x80);
        }
        else if (ch < 0x80)
          out.write(ch);
        else if (ch < 0x800) {
          out.write(0xc0 + ((ch >> 6) & 0x1f));
          out.write(0x80 + (ch & 0x3f));
        }
        else if (ch < 0x8000) {
          out.write(0xe0 + ((ch >> 12) & 0x0f));
          out.write(0x80 + ((ch >> 6) & 0x3f));
          out.write(0x80 + (ch & 0x3f));
        }
      }
    } catch (IOException e) {
      throw new JMSExceptionWrapper(e);
    }
  }

  /**
   * Writes a character to the stream.
   */
  public void writeChar(char ch)
    throws JMSException
  {
    try {
      WriteStream ws = getWriteStream();

      ws.write(ch >> 8);
      ws.write(ch);
    } catch (IOException e) {
      throw new JMSExceptionWrapper(e);
    }
  }

  /**
   * Writes a byte array to the stream.
   */
  public void writeBytes(byte []buf)
    throws JMSException
  {
    writeBytes(buf, 0, buf.length);
  }

  /**
   * Writes a byte array to the stream.
   */
  public void writeBytes(byte []buf, int offset, int length)
    throws JMSException
  {
    try {
      WriteStream ws = getWriteStream();

      ws.write(buf, offset, length);
    } catch (IOException e) {
      throw new JMSExceptionWrapper(e);
    }
  }

  /**
   * Writes the next object.
   */
  public void writeObject(Object obj)
    throws JMSException
  {
    if (obj == null)
      throw new NullPointerException();
    else if (obj instanceof Boolean)
      writeBoolean(((Boolean) obj).booleanValue());
    else if (obj instanceof Byte)
      writeByte(((Byte) obj).byteValue());
    else if (obj instanceof Short)
      writeShort(((Short) obj).shortValue());
    else if (obj instanceof Character)
      writeChar(((Character) obj).charValue());
    else if (obj instanceof Integer)
      writeInt(((Integer) obj).intValue());
    else if (obj instanceof Long)
      writeLong(((Long) obj).longValue());
    else if (obj instanceof Float)
      writeFloat(((Float) obj).floatValue());
    else if (obj instanceof Double)
      writeDouble(((Double) obj).doubleValue());
    else if (obj instanceof String)
      writeUTF((String) obj);
    else if (obj instanceof byte[])
      writeBytes((byte[]) obj);
    else
      throw new MessageFormatException(obj.getClass().getName() + ": " + String.valueOf(obj));
  }

  public long getBodyLength()
    throws JMSException
  {
    checkBodyReadable();
    
    if (_tempStream == null)
      return 0;
    else
      return _tempStream.getLength();
  }

  protected WriteStream getWriteStream()
    throws JMSException
  {
    checkBodyWriteable();

    if (_tempStream == null)
      _tempStream = new TempStream();
    
    if (_ws == null)
      _ws = new WriteStream(_tempStream);

    return _ws;
  }

  public MessageImpl copy()
  {
    try {
      return new BytesMessageImpl(this);
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }

  protected void copy(BytesMessageImpl newMsg)
  {
    super.copy(newMsg);

    try {
      if (_ws != null)
	_ws.flush();

      if (_tempStream != null)
	newMsg._tempStream = _tempStream.copy();
    } catch (Exception e) {
      log.log(Level.WARNING, e.toString(), e);
    }
  }

  /**
   * Serialize the body to an input stream.
   */
  @Override
  public InputStream bodyToInputStream()
    throws IOException
  {
    if (_tempStream != null)
      return _tempStream.openReadAndSaveBuffer();
    else
      return null;
  }

  /**
   * Read the body from an input stream.
   */
  @Override
  public void readBody(InputStream is)
    throws IOException, JMSException
  {
    if (is != null) {
      WriteStream out = getWriteStream();

      out.writeStream(is);

      out.close();
    }

    reset();
  }

  public String toString()
  {
    return "BytesMessageImpl[]";
  }
}