largestringbuildervalue.java

RESIN 3.2 最新源码

  public final StringValue appendUnicode(char []buf, int offset, int length)
  {
    return append(buf, offset, length);
  }
  
  /**
   * Append a Java string to the value.
   */
  @Override
  public StringValue append(String s)
  {
    int len = s.length();
    
    ensureCapacity(_length + len);
    
    for (int i = 0; i < len; i++) {
      _bufferList[_length / SIZE][_length % SIZE] = (byte) s.charAt(i);
      
      _length++;
    }
    
    return this;
  }
  
  /**
   * Append a Java buffer to the value.
   */
  @Override
  public final StringValue append(char []buf, int offset, int length)
  {
    ensureCapacity(_length + length);

    for (int i = offset; i < length + offset; i++) {
      _bufferList[_length / SIZE][_length % SIZE] = (byte) buf[i];
      
      _length++;
    }

    return this;
  }

  /**
   * Append a buffer to the value.
   */
  public final StringValue append(byte []buf, int offset, int length)
  {
    ensureCapacity(_length + length);

    while (length > 0) {
      int chunk = _length / SIZE;
      int chunkOffset = _length % SIZE;

      int sublen = SIZE - chunkOffset;
      if (length < sublen)
	sublen = length;

      System.arraycopy(buf, offset, _bufferList[chunk], chunkOffset, sublen);

      offset += sublen;
      length -= sublen;
      _length += sublen;
    }
      
    return this;
  }

  /**
   * Append a double to the value.
   */
  public final StringValue append(byte []buf)
  {
    return append(buf, 0, buf.length);
  }

  /**
   * Append a Java byte to the value without conversions.
   */
  @Override
  public final StringValue append(char v)
  {
    if (_length % SIZE == 0)
      ensureCapacity(_length + 1);

    _bufferList[_length / SIZE][_length % SIZE] = (byte) v;

    _length += 1;

    return this;
  }

  /**
   * Append a Java byte to the value without conversions.
   */
  public final StringValue append(byte v)
  {
    if (_length % SIZE == 0)
      ensureCapacity(_length + 1);

    _bufferList[_length / SIZE][_length % SIZE] = (byte) v;

    _length += 1;

    return this;
  }

  /**
   * Append a Java boolean to the value.
   */
  @Override
  public final StringValue append(boolean v)
  {
    return append(v ? "true" : "false");
  }

  /**
   * Append a Java long to the value.
   */
  @Override
  public StringValue append(long v)
  {
    // XXX: this probably is frequent enough to special-case
    
    return append(String.valueOf(v));
  }

  /**
   * Append a Java double to the value.
   */
  @Override
  public StringValue append(double v)
  {
    return append(String.valueOf(v));
  }
  
  /**
   * Append a Java value to the value.
   */
  @Override
  public final StringValue append(Value v)
  {
    v.appendTo(this);

    return this;
  }

  /**
   * Append from an input stream, using InputStream.read semantics,
   * i.e. just call is.read once even if more data is available.
   */
  public int appendRead(InputStream is, long length)
  {
    try {
      int offset = _length % SIZE;

      if (offset == 0) {
	ensureCapacity(_length + SIZE);
      }
      
      byte []buffer = _bufferList[_length / SIZE];
      int sublen = SIZE - offset;

      if (length < sublen)
	sublen = (int) length;

      sublen = is.read(buffer, 0, sublen);

      if (sublen > 0) {
	_length += sublen;

	return sublen;
      }
      else
	return -1;
    } catch (IOException e) {
      throw new QuercusRuntimeException(e);
    }
  }

  /**
   * Append from an input stream, reading from the input stream until
   * end of file or the length is reached.
   */
  public int appendReadAll(InputStream is, long length)
  {
    int readLength = 0;
    
    while (length > 0) {
      int sublen = appendRead(is, length);

      if (sublen < 0)
	return readLength <= 0 ? -1 : readLength;

      length -= sublen;
      readLength += sublen;
    }

    return readLength;
  }
  
  /**
   * Append to a string builder.
   */
  public StringValue appendTo(UnicodeBuilderValue sb)
  {
    if (length() == 0)
      return sb;
    
    Env env = Env.getInstance();

    try {
      Reader reader = env.getRuntimeEncodingFactory().create(toInputStream());
      
      if (reader != null) {
        sb.append(reader);

        reader.close();
      }

      return sb;
    } catch (IOException e) {
      throw new QuercusRuntimeException(e);
    }
  }

  //
  // Java generator code
  //

  /**
   * Prints the value.
   * @param env
   */
  public void print(Env env)
  {
    for (int i = 0; i < _length; i += SIZE) {
      int chunk = i / SIZE;
      int sublen = _length - i;

      if (SIZE < sublen)
	sublen = SIZE;
	
      env.write(_bufferList[chunk], 0, sublen);
    }
  }

  /**
   * Prints the value.
   * @param env
   */
  public void print(Env env, WriteStream out)
  {
    try {
      for (int i = 0; i < _length; i += SIZE) {
	int chunk = i / SIZE;
	int sublen = _length - i;

	if (SIZE < sublen)
	  sublen = SIZE;
	
	out.write(_bufferList[chunk], 0, sublen);
      }
    } catch (IOException e) {
      throw new QuercusRuntimeException(e);
    }
  }

  /**
   * Serializes the value.
   */
  public void serialize(StringBuilder sb)
  {
    sb.append("s:");
    sb.append(_length);
    sb.append(":\"");
    sb.append(toString());
    sb.append("\";");
  }

  /**
   * Returns an OutputStream.
   */
  public OutputStream getOutputStream()
  {
    return new BuilderOutputStream();
  }

  private void ensureCapacity(int newCapacity)
  {
    int chunk = _length / SIZE;
    int endChunk = newCapacity / SIZE;

    if (_bufferList.length <= endChunk) {
      byte [][]bufferList = new byte[endChunk + 32][];
      System.arraycopy(_bufferList, 0, bufferList, 0, _bufferList.length);
      _bufferList = bufferList;
    }

    for (; chunk <= endChunk; chunk++) {
      if (_bufferList[chunk] == null)
	_bufferList[chunk] = new byte[SIZE];
    }
  }

  /**
   * Returns the hash code.
   */
  @Override
  public int hashCode()
  {
    if (_hashCode != 0)
      return _hashCode;
    
    int hash = 37;

    int length = _length;

    byte [][]bufferList = _bufferList;
    for (int i = 0; i < length; i++) {
      hash = 65521 * hash + (bufferList[i / SIZE][i % SIZE] & 0xff);
    }

    _hashCode = hash;

    return hash;
  }

  @Override
  public String toDebugString()
  {
    StringBuilder sb = new StringBuilder();

    int length = length();

    sb.append("string(");
    sb.append(length);
    sb.append(") \"");

    int appendLength = length > 256 ? 256 : length;

    for (int i = 0; i < appendLength; i++)
      sb.append(charAt(i));

    if (length > 256)
      sb.append(" ...");

    sb.append('"');

    return sb.toString();
  }

  @Override
  public void varDumpImpl(Env env,
                          WriteStream out,
                          int depth,
                          IdentityHashMap<Value, String> valueSet)
    throws IOException
  {
    int length = length();

    if (length < 0)
        length = 0;
    
    out.print("string(");
    out.print(length);
    out.print(") \"");

    for (int i = 0; i < length; i++) {
      int ch = charAt(i);

      out.print((char) ch);
    }

    out.print("\"");
    
    /*
    int length = length();

    if (length < 0)
        length = 0;

    out.print("string");
    
    out.print("(");
    out.print(length);
    out.print(") \"");

    for (int i = 0; i < length; i++) {
      char ch = charAt(i);

      if (0x20 <= ch && ch <= 0x7f || ch == '\t' || ch == '\r' || ch == '\n')
        out.print(ch);
      else if (ch <= 0xff)
        out.print("\\x" + Integer.toHexString(ch / 16) + Integer.toHexString(ch % 16));
      else {
        out.print("\\u"
		  + Integer.toHexString((ch >> 12) & 0xf)
		  + Integer.toHexString((ch >> 8) & 0xf)
		  + Integer.toHexString((ch >> 4) & 0xf)
		  + Integer.toHexString((ch) & 0xf));
      }
    }

    out.print("\"");
    */
  }

  class BuilderInputStream extends InputStream {
    private int _index;
    
    /**
     * Reads the next byte.
     */
    @Override
    public int read()
    {
      if (_index < _length)
	return charAt(_index++);
      else
	return -1;
    }

    /**
     * Reads into a buffer.
     */
    @Override
    public int read(byte []buffer, int offset, int length)
    {
      int sublen = _length - _index;

      if (length < sublen)
	sublen = length;

      if (sublen <= 0)
	return -1;

      for (int i = 0; i < sublen; i++)
	buffer[offset + i] = (byte) charAt(_index + i);

      _index += sublen;

      return sublen;
    }
  }

  class BuilderOutputStream extends OutputStream {
    /**
     * Writes the next byte.
     */
    @Override
    public void write(int ch)
    {
      append(ch);
    }

    /**
     * Reads into a buffer.
     */
    @Override
    public void write(byte []buffer, int offset, int length)
    {
      append(buffer, offset, length);
    }
  }
}