hessianoutput.java

来自「RESIN 3.2 最新源码」· Java 代码 · 共 950 行 · 第 1/2 页

   *
   * @param value the double value to write.
   */
  public void writeDouble(double value)
    throws IOException
  {
    long bits = Double.doubleToLongBits(value);
    
    os.write('D');
    os.write((byte) (bits >> 56));
    os.write((byte) (bits >> 48));
    os.write((byte) (bits >> 40));
    os.write((byte) (bits >> 32));
    os.write((byte) (bits >> 24));
    os.write((byte) (bits >> 16));
    os.write((byte) (bits >> 8));
    os.write((byte) (bits));
  }

  /**
   * 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
  {
    os.write('d');
    os.write((byte) (time >> 56));
    os.write((byte) (time >> 48));
    os.write((byte) (time >> 40));
    os.write((byte) (time >> 32));
    os.write((byte) (time >> 24));
    os.write((byte) (time >> 16));
    os.write((byte) (time >> 8));
    os.write((byte) (time));
  }

  /**
   * 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
  {
    os.write('N');
  }

  /**
   * 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
  {
    if (value == null) {
      os.write('N');
    }
    else {
      int length = value.length();
      int offset = 0;
      
      while (length > 0x8000) {
        int sublen = 0x8000;

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

	if (0xd800 <= tail && tail <= 0xdbff)
	  sublen--;
        
        os.write('s');
        os.write(sublen >> 8);
        os.write(sublen);

        printString(value, offset, sublen);

        length -= sublen;
        offset += sublen;
      }

      os.write('S');
      os.write(length >> 8);
      os.write(length);

      printString(value, offset, 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) {
      os.write('N');
    }
    else {
      while (length > 0x8000) {
        int sublen = 0x8000;

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

	if (0xd800 <= tail && tail <= 0xdbff)
	  sublen--;
        
        os.write('s');
        os.write(sublen >> 8);
        os.write(sublen);

        printString(buffer, offset, sublen);

        length -= sublen;
        offset += sublen;
      }

      os.write('S');
      os.write(length >> 8);
      os.write(length);

      printString(buffer, offset, length);
    }
  }

  /**
   * Writes a byte array to the stream.
   * The array will be written with the following syntax:
   *
   * <code><pre>
   * B b16 b18 bytes
   * </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 writeBytes(byte []buffer)
    throws IOException
  {
    if (buffer == null)
      os.write('N');
    else
      writeBytes(buffer, 0, buffer.length);
  }
  
  /**
   * Writes a byte array to the stream.
   * The array will be written with the following syntax:
   *
   * <code><pre>
   * B b16 b18 bytes
   * </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 writeBytes(byte []buffer, int offset, int length)
    throws IOException
  {
    if (buffer == null) {
      os.write('N');
    }
    else {
      while (length > 0x8000) {
        int sublen = 0x8000;
        
        os.write('b');
        os.write(sublen >> 8);
        os.write(sublen);

        os.write(buffer, offset, sublen);

        length -= sublen;
        offset += sublen;
      }

      os.write('B');
      os.write(length >> 8);
      os.write(length);
      os.write(buffer, offset, length);
    }
  }
  
  /**
   * Writes a byte buffer to the stream.
   *
   * <code><pre>
   * </pre></code>
   */
  public void writeByteBufferStart()
    throws IOException
  {
  }
  
  /**
   * Writes a byte buffer to the stream.
   *
   * <code><pre>
   * b b16 b18 bytes
   * </pre></code>
   */
  public void writeByteBufferPart(byte []buffer, int offset, int length)
    throws IOException
  {
    while (length > 0) {
      int sublen = length;

      if (0x8000 < sublen)
	sublen = 0x8000;

      os.write('b');
      os.write(sublen >> 8);
      os.write(sublen);

      os.write(buffer, offset, sublen);

      length -= sublen;
      offset += sublen;
    }
  }
  
  /**
   * Writes a byte buffer to the stream.
   *
   * <code><pre>
   * b b16 b18 bytes
   * </pre></code>
   */
  public void writeByteBufferEnd(byte []buffer, int offset, int length)
    throws IOException
  {
    writeBytes(buffer, offset, length);
  }

  /**
   * Writes a reference.
   *
   * <code><pre>
   * R b32 b24 b16 b8
   * </pre></code>
   *
   * @param value the integer value to write.
   */
  public void writeRef(int value)
    throws IOException
  {
    os.write('R');
    os.write(value >> 24);
    os.write(value >> 16);
    os.write(value >> 8);
    os.write(value);
  }

  /**
   * Writes a placeholder.
   *
   * <code><pre>
   * P
   * </pre></code>
   */
  public void writePlaceholder()
    throws IOException
  {
    os.write('P');
  }

  /**
   * If the object has already been written, just write its ref.
   *
   * @return true if we're writing a ref.
   */
  public boolean addRef(Object object)
    throws IOException
  {
    if (_refs == null)
      _refs = new IdentityHashMap();

    Integer ref = (Integer) _refs.get(object);

    if (ref != null) {
      int value = ref.intValue();
      
      writeRef(value);
      return true;
    }
    else {
      _refs.put(object, new Integer(_refs.size()));
      
      return false;
    }
  }

  /**
   * Resets the references for streaming.
   */
  public void resetReferences()
  {
    if (_refs != null)
      _refs.clear();
  }

  /**
   * Removes a reference.
   */
  public boolean removeRef(Object obj)
    throws IOException
  {
    if (_refs != null) {
      _refs.remove(obj);

      return true;
    }
    else
      return false;
  }

  /**
   * Replaces a reference from one object to another.
   */
  public boolean replaceRef(Object oldRef, Object newRef)
    throws IOException
  {
    Integer value = (Integer) _refs.remove(oldRef);

    if (value != null) {
      _refs.put(newRef, value);
      return true;
    }
    else
      return false;
  }

  /**
   * Prints a string to the stream, encoded as UTF-8 with preceeding length
   *
   * @param v the string to print.
   */
  public void printLenString(String v)
    throws IOException
  {
    if (v == null) {
      os.write(0);
      os.write(0);
    }
    else {
      int len = v.length();
      os.write(len >> 8);
      os.write(len);

      printString(v, 0, len);
    }
  }

  /**
   * Prints a string to the stream, encoded as UTF-8
   *
   * @param v the string to print.
   */
  public void printString(String v)
    throws IOException
  {
    printString(v, 0, v.length());
  }
  
  /**
   * Prints a string to the stream, encoded as UTF-8
   *
   * @param v the string to print.
   */
  public void printString(String v, int offset, int length)
    throws IOException
  {
    for (int i = 0; i < length; i++) {
      char ch = v.charAt(i + offset);

      if (ch < 0x80)
        os.write(ch);
      else if (ch < 0x800) {
        os.write(0xc0 + ((ch >> 6) & 0x1f));
        os.write(0x80 + (ch & 0x3f));
      }
      else {
        os.write(0xe0 + ((ch >> 12) & 0xf));
        os.write(0x80 + ((ch >> 6) & 0x3f));
        os.write(0x80 + (ch & 0x3f));
      }
    }
  }
  
  /**
   * Prints a string to the stream, encoded as UTF-8
   *
   * @param v the string to print.
   */
  public void printString(char []v, int offset, int length)
    throws IOException
  {
    for (int i = 0; i < length; i++) {
      char ch = v[i + offset];

      if (ch < 0x80)
        os.write(ch);
      else if (ch < 0x800) {
        os.write(0xc0 + ((ch >> 6) & 0x1f));
        os.write(0x80 + (ch & 0x3f));
      }
      else {
        os.write(0xe0 + ((ch >> 12) & 0xf));
        os.write(0x80 + ((ch >> 6) & 0x3f));
        os.write(0x80 + (ch & 0x3f));
      }
    }
  }

  public void flush()
    throws IOException
  {
    if (this.os != null)
      this.os.flush();
  }

  public void close()
    throws IOException
  {
    if (this.os != null)
      this.os.flush();
  }
}