hessian2output.java

来自「RESIN 3.2 最新源码」· Java 代码 · 共 1,662 行 · 第 1/3 页

   * <code>writeMapBegin</code> followed by the map contents and then
   * call <code>writeMapEnd</code>.
   *
   * <code><pre>
   * Mt b16 b8 (<key> <value>)z
   * </pre></code>
   */
  public void writeMapBegin(String type)
    throws IOException
  {
    if (SIZE < _offset + 32)
      flush();
    
    _buffer[_offset++] = 'M';

    writeType(type);
  }

  /**
   * Writes the tail of the map to the stream.
   */
  public void writeMapEnd()
    throws IOException
  {
    if (SIZE < _offset + 32)
      flush();
    
    _buffer[_offset++] = (byte) 'z';
  }

  /**
   * Writes the object definition
   *
   * <code><pre>
   * O t b16 b8 <string>*
   * </pre></code>
   */
  public int writeObjectBegin(String type)
    throws IOException
  {
    if (_classRefs == null)
      _classRefs = new HashMap();

    Integer refV = (Integer) _classRefs.get(type);

    if (refV != null) {
      int ref = refV.intValue();
      
      if (SIZE < _offset + 32)
	flush();

      _buffer[_offset++] = (byte) 'o';
      writeInt(ref);

      return ref;
    }
    else {
      int ref = _classRefs.size();
      
      _classRefs.put(type, Integer.valueOf(ref));
      
      if (SIZE < _offset + 32)
	flush();

      _buffer[_offset++] = (byte) 'O';

      writeString(type);

      return -1;
    }
  }

  /**
   * Writes the tail of the class definition to the stream.
   */
  public void writeClassFieldLength(int len)
    throws IOException
  {
    writeInt(len);
  }

  /**
   * Writes the tail of the object definition to the stream.
   */
  public void writeObjectEnd()
    throws IOException
  {
  }

  /**
   * Writes a remote object reference to the stream.  The type is the
   * type of the remote interface.
   *
   * <code><pre>
   * 'r' 't' b16 b8 type url
   * </pre></code>
   */
  public void writeRemote(String type, String url)
    throws IOException
  {
    if (SIZE < _offset + 32)
      flush();

    _buffer[_offset++] = (byte) 'r';

    writeType(type);

    if (SIZE < _offset + 32)
      flush();

    _buffer[_offset++] = (byte) 'S';
    
    printLenString(url);
  }

  private void writeType(String type)
    throws IOException
  {
    if (type == null)
      return;

    int len = type.length();
    if (len == 0)
      return;

    if (_typeRefs == null)
      _typeRefs = new HashMap();

    Integer typeRefV = (Integer) _typeRefs.get(type);
    
    if (typeRefV != null) {
      int typeRef = typeRefV.intValue();
      
      flushIfFull();
      
      _buffer[_offset++] = (byte) TYPE_REF;
      
      writeInt(typeRef);
    }
    else {
      _typeRefs.put(type, Integer.valueOf(_typeRefs.size()));

      if (SIZE < _offset + 32)
	flush();
      
      _buffer[_offset++] = (byte) 't';
      
      printLenString(type);
    }
  }

  /**
   * Writes a boolean value to the stream.  The boolean will be written
   * with the following syntax:
   *
   * <code><pre>
   * T
   * F
   * </pre></code>
   *
   * @param value the boolean value to write.
   */
  public void writeBoolean(boolean value)
    throws IOException
  {
    if (SIZE < _offset + 16)
      flush();

    if (value)
      _buffer[_offset++] = (byte) 'T';
    else
      _buffer[_offset++] = (byte) 'F';
  }

  /**
   * Writes an integer value to the stream.  The integer will be written
   * with the following syntax:
   *
   * <code><pre>
   * I b32 b24 b16 b8
   * </pre></code>
   *
   * @param value the integer value to write.
   */
  public void writeInt(int value)
    throws IOException
  {
    int offset = _offset;
    byte []buffer = _buffer;

    if (SIZE <= offset + 16) {
      flush();
      offset = _offset;
    }
    
    if (INT_DIRECT_MIN <= value && value <= INT_DIRECT_MAX)
      buffer[offset++] = (byte) (value + INT_ZERO);
    else if (INT_BYTE_MIN <= value && value <= INT_BYTE_MAX) {
      buffer[offset++] = (byte) (INT_BYTE_ZERO + (value >> 8));
      buffer[offset++] = (byte) (value);
    }
    else if (INT_SHORT_MIN <= value && value <= INT_SHORT_MAX) {
      buffer[offset++] = (byte) (INT_SHORT_ZERO + (value >> 16));
      buffer[offset++] = (byte) (value >> 8);
      buffer[offset++] = (byte) (value);
    }
    else {
      buffer[offset++] = (byte) ('I');
      buffer[offset++] = (byte) (value >> 24);
      buffer[offset++] = (byte) (value >> 16);
      buffer[offset++] = (byte) (value >> 8);
      buffer[offset++] = (byte) (value);
    }

    _offset = offset;
  }

  /**
   * Writes a long value to the stream.  The long will be written
   * with the following syntax:
   *
   * <code><pre>
   * L b64 b56 b48 b40 b32 b24 b16 b8
   * </pre></code>
   *
   * @param value the long value to write.
   */
  public void writeLong(long value)
    throws IOException
  {
    int offset = _offset;
    byte []buffer = _buffer;

    if (SIZE <= offset + 16) {
      flush();
      offset = _offset;
    }

    if (LONG_DIRECT_MIN <= value && value <= LONG_DIRECT_MAX) {
      buffer[offset++] = (byte) (value + LONG_ZERO);
    }
    else if (LONG_BYTE_MIN <= value && value <= LONG_BYTE_MAX) {
      buffer[offset++] = (byte) (LONG_BYTE_ZERO + (value >> 8));
      buffer[offset++] = (byte) (value);
    }
    else if (LONG_SHORT_MIN <= value && value <= LONG_SHORT_MAX) {
      buffer[offset++] = (byte) (LONG_SHORT_ZERO + (value >> 16));
      buffer[offset++] = (byte) (value >> 8);
      buffer[offset++] = (byte) (value);
    }
    else if (-0x80000000L <= value && value <= 0x7fffffffL) {
      buffer[offset + 0] = (byte) LONG_INT;
      buffer[offset + 1] = (byte) (value >> 24);
      buffer[offset + 2] = (byte) (value >> 16);
      buffer[offset + 3] = (byte) (value >> 8);
      buffer[offset + 4] = (byte) (value);

      offset += 5;
    }
    else {
      buffer[offset + 0] = (byte) 'L';
      buffer[offset + 1] = (byte) (value >> 56);
      buffer[offset + 2] = (byte) (value >> 48);
      buffer[offset + 3] = (byte) (value >> 40);
      buffer[offset + 4] = (byte) (value >> 32);
      buffer[offset + 5] = (byte) (value >> 24);
      buffer[offset + 6] = (byte) (value >> 16);
      buffer[offset + 7] = (byte) (value >> 8);
      buffer[offset + 8] = (byte) (value);

      offset += 9;
    }

    _offset = offset;
  }

  /**
   * Writes a double value to the stream.  The double will be written
   * with the following syntax:
   *
   * <code><pre>
   * D b64 b56 b48 b40 b32 b24 b16 b8
   * </pre></code>
   *
   * @param value the double value to write.
   */
  public void writeDouble(double value)
    throws IOException
  {
    int offset = _offset;
    byte []buffer = _buffer;

    if (SIZE <= offset + 16) {
      flush();
      offset = _offset;
    }
    
    int intValue = (int) value;
    
    if (intValue == value) {
      if (intValue == 0) {
	buffer[offset++] = (byte) DOUBLE_ZERO;

        _offset = offset;

        return;
      }
      else if (intValue == 1) {
	buffer[offset++] = (byte) DOUBLE_ONE;

        _offset = offset;

        return;
      }
      else if (-0x80 <= intValue && intValue < 0x80) {
	buffer[offset++] = (byte) DOUBLE_BYTE;
	buffer[offset++] = (byte) intValue;

        _offset = offset;

        return;
      }
      else if (-0x8000 <= intValue && intValue < 0x8000) {
	buffer[offset + 0] = (byte) DOUBLE_SHORT;
	buffer[offset + 1] = (byte) (intValue >> 8);
	buffer[offset + 2] = (byte) intValue;

	_offset = offset + 3;
        
        return;
      }
    }

    float f = (float) value;

    if (f == value) {
      int bits = Float.floatToIntBits(f);
      
      buffer[offset + 0] = (byte) (DOUBLE_FLOAT);
      buffer[offset + 1] = (byte) (bits >> 24);
      buffer[offset + 2] = (byte) (bits >> 16);
      buffer[offset + 3] = (byte) (bits >> 8);
      buffer[offset + 4] = (byte) (bits);

      _offset = offset + 5;

      return;
    }
    
    long bits = Double.doubleToLongBits(value);
    
    buffer[offset + 0] = (byte) 'D';
    buffer[offset + 1] = (byte) (bits >> 56);
    buffer[offset + 2] = (byte) (bits >> 48);
    buffer[offset + 3] = (byte) (bits >> 40);
    buffer[offset + 4] = (byte) (bits >> 32);
    buffer[offset + 5] = (byte) (bits >> 24);
    buffer[offset + 6] = (byte) (bits >> 16);
    buffer[offset + 7] = (byte) (bits >> 8);
    buffer[offset + 8] = (byte) (bits);

    _offset = offset + 9;
  }

  /**
   * Writes a date to the stream.
   *
   * <code><pre>
   * T  b64 b56 b48 b40 b32 b24 b16 b8
   * </pre></code>
   *
   * @param time the date in milliseconds from the epoch in UTC
   */
  public void writeUTCDate(long time)
    throws IOException
  {
    if (SIZE < _offset + 32)
      flush();

    int offset = _offset;
    byte []buffer = _buffer;
    
    buffer[offset++] = (byte) ('d');
    buffer[offset++] = ((byte) (time >> 56));
    buffer[offset++] = ((byte) (time >> 48));
    buffer[offset++] = ((byte) (time >> 40));
    buffer[offset++] = ((byte) (time >> 32));
    buffer[offset++] = ((byte) (time >> 24));
    buffer[offset++] = ((byte) (time >> 16));
    buffer[offset++] = ((byte) (time >> 8));
    buffer[offset++] = ((byte) (time));

    _offset = offset;
  }

  /**
   * Writes a null value to the stream.
   * The null will be written with the following syntax
   *
   * <code><pre>
   * N
   * </pre></code>
   *
   * @param value the string value to write.
   */
  public void writeNull()
    throws IOException
  {
    int offset = _offset;
    byte []buffer = _buffer;

    if (SIZE <= offset + 16) {
      flush();
      offset = _offset;
    }

    buffer[offset++] = 'N';

    _offset = offset;
  }

  /**
   * Writes a string value to the stream using UTF-8 encoding.
   * The string will be written with the following syntax:
   *
   * <code><pre>
   * S b16 b8 string-value
   * </pre></code>
   *
   * If the value is null, it will be written as
   *
   * <code><pre>
   * N
   * </pre></code>
   *
   * @param value the string value to write.
   */
  public void writeString(String value)
    throws IOException
  {
    int offset = _offset;
    byte []buffer = _buffer;

    if (SIZE <= offset + 16) {
      flush();
      offset = _offset;
    }
    
    if (value == null) {
      buffer[offset++] = (byte) 'N';

      _offset = offset;
    }
    else {
      int length = value.length();
      int strOffset = 0;
      
      while (length > 0x8000) {
        int sublen = 0x8000;

	offset = _offset;

	if (SIZE <= offset + 16) {
	  flush();
	  offset = _offset;
	}

	// chunk can't end in high surrogate
	char tail = value.charAt(strOffset + sublen - 1);

	if (0xd800 <= tail && tail <= 0xdbff)
	  sublen--;

	buffer[offset + 0] = (byte) 's';
        buffer[offset + 1] = (byte) (sublen >> 8);
        buffer[offset + 2] = (byte) (sublen);

	_offset = offset + 3;

        printString(value, strOffset, sublen);

        length -= sublen;
        strOffset += sublen;
      }

      offset = _offset;

      if (SIZE <= offset + 16) {
	flush();
	offset = _offset;
      }

      if (length <= STRING_DIRECT_MAX) {
	buffer[offset++] = (byte) (STRING_DIRECT + length);
      }
      else {
	buffer[offset++] = (byte) ('S');
	buffer[offset++] = (byte) (length >> 8);
	buffer[offset++] = (byte) (length);
      }

      _offset = offset;

      printString(value, strOffset, length);
    }
  }

  /**
   * Writes a string value to the stream using UTF-8 encoding.
   * The string will be written with the following syntax:
   *
   * <code><pre>
   * S b16 b8 string-value
   * </pre></code>
   *
   * If the value is null, it will be written as
   *
   * <code><pre>
   * N
   * </pre></code>
   *
   * @param value the string value to write.
   */
  public void writeString(char []buffer, int offset, int length)
    throws IOException
  {
    if (buffer == null) {
      if (SIZE < _offset + 16)
	flush();
      
      _buffer[_offset++] = (byte) ('N');
    }
    else {
      while (length > 0x8000) {
        int sublen = 0x8000;

	if (SIZE < _offset + 16)
	  flush();

	// chunk can't end in high surrogate
	char tail = buffer[offset + sublen - 1];

	if (0xd800 <= tail && tail <= 0xdbff)
	  sublen--;
	
        _buffer[_offset++] = (byte) 's';
        _buffer[_offset++] = (byte) (sublen >> 8);
        _buffer[_offset++] = (byte) (sublen);

        printString(buffer, offset, sublen);

        length -= sublen;
        offset += sublen;
      }