csv.jflex.skel

java操作excel的类

  /** This character denotes the end of file */
  private static final int YYEOF = -1;

  /** initial size of the lookahead buffer */
--- private static final int YY_BUFFERSIZE = ...;

  /** lexical states */
---  lexical states, charmap
  /** 
   * Per instance reference to the character map.
   * This can be cloned and modified per instance if needed.
   * It is initally set to the static value.
   */
  private char [] yycmap_instance = yycmap;

  /* error codes */
  private static final int YY_UNKNOWN_ERROR = 0;
  private static final int YY_ILLEGAL_STATE = 1;
  private static final int YY_NO_MATCH = 2;
  private static final int YY_PUSHBACK_2BIG = 3;

  /* error messages for the codes above */
  private static final String YY_ERROR_MSG[] = {
    "Unkown internal scanner error",
    "Internal error: unknown state",
    "Error: could not match input",
    "Error: pushback value was too large"
  };

--- isFinal list
  /** the input device */
  private java.io.Reader yy_reader;

  /** the current state of the DFA */
  private int yy_state;

  /** the current lexical state */
  private int yy_lexical_state = YYINITIAL;

  /** this buffer contains the current text to be matched and is
      the source of the yytext() string */
  private char yy_buffer[] = new char[YY_BUFFERSIZE];

  /** the textposition at the last accepting state */
  private int yy_markedPos;

  /** the textposition at the last state to be included in yytext */
  private int yy_pushbackPos;

  /** the current text position in the buffer */
  private int yy_currentPos;

  /** startRead marks the beginning of the yytext() string in the buffer */
  private int yy_startRead;

  /** endRead marks the last character in the buffer, that has been read
      from input */
  private int yy_endRead;

  /** yy_atEOF == true <=> the scanner is at the EOF */
  private boolean yy_atEOF;

--- user class code

  /**
   * Creates a new scanner
   * There is also a java.io.InputStream version of this constructor.
   *
   * @param   in  the java.io.Reader to read input from.
   */
--- constructor declaration


  /**
   * Refills the input buffer.
   *
   * @return      <code>false</code>, iff there was new input.
   * 
   * @exception   IOException  if any I/O-Error occurs
   */
  private boolean yy_refill() throws java.io.IOException {

    /* first: make room (if you can) */
    if (yy_startRead > 0) {
      System.arraycopy(yy_buffer, yy_startRead, 
                       yy_buffer, 0, 
                       yy_endRead-yy_startRead);

      /* translate stored positions */
      yy_endRead-= yy_startRead;
      yy_currentPos-= yy_startRead;
      yy_markedPos-= yy_startRead;
      yy_pushbackPos-= yy_startRead;
      yy_startRead = 0;
    }

    /* is the buffer big enough? */
    if (yy_currentPos >= yy_buffer.length) {
      /* if not: blow it up */
      char newBuffer[] = new char[yy_currentPos*2];
      System.arraycopy(yy_buffer, 0, newBuffer, 0, yy_buffer.length);
      yy_buffer = newBuffer;
    }

    /* finally: fill the buffer with new input */
    int numRead = yy_reader.read(yy_buffer, yy_endRead, 
                                            yy_buffer.length-yy_endRead);

    if (numRead < 0) {
      return true;
    }
    else {
      yy_endRead+= numRead;  
      return false;
    }
  }
  
  /**
   * Enters a new lexical state
   *
   * @param newState the new lexical state
   */
  private final void yybegin(int newState) {
    yy_lexical_state = newState;
  }

  /**
   * Returns the text matched by the current regular expression.
   */
  private final String yytext() {
    return new String( yy_buffer, yy_startRead, yy_markedPos-yy_startRead );
  }

  /**
   * Returns the length of the matched text region.
   */
  private final int yylength() {
    return yy_markedPos-yy_startRead;
  }


  /**
   * Reports an error that occured while scanning.
   *
   * In a wellformed scanner (no or only correct usage of 
   * yypushback(int) and a match-all fallback rule) this method 
   * will only be called with things that "Can't Possibly Happen".
   * If this method is called, something is seriously wrong
   * (e.g. a JFlex bug producing a faulty scanner etc.).
   *
   * Usual syntax/scanner level error handling should be done
   * in error fallback rules.
   *
   * @param   errorCode  the code of the errormessage to display
   */
--- yy_ScanError declaration  
    String message;
    try {
      message = YY_ERROR_MSG[errorCode];
    }
    catch (ArrayIndexOutOfBoundsException e) {
      message = YY_ERROR_MSG[YY_UNKNOWN_ERROR];
    }

--- throws clause
  } 


  /**
   * Pushes the specified amount of characters back into the input stream.
   *
   * They will be read again by then next call of the scanning method
   *
   * @param number  the number of characters to be read again.
   *                This number must not be greater than yylength()!
   */
--- yypushback decl (contains yy_ScanError exception)
    if ( number > yylength() )
      yy_ScanError(YY_PUSHBACK_2BIG);

    yy_markedPos -= number;
  }

--- yy_doEof
  /**
   * Resumes scanning until the next regular expression is matched,
   * the end of input is encountered or an I/O-Error occurs.
   *
   * @return      the next token
   * @exception   IOException  if any I/O-Error occurs
   */
--- yylex declaration
    int yy_input;
    int yy_action;

    // cached fields:
    int yy_currentPos_l;
    int yy_startRead_l;
    int yy_markedPos_l;
    int yy_endRead_l = yy_endRead;
    char [] yy_buffer_l = yy_buffer;
    char [] yycmap_l = yycmap_instance;

--- local declarations

    while (true) {
      yy_markedPos_l = yy_markedPos;

--- start admin (line, char, col count)
      yy_action = -1;

      yy_startRead_l = yy_currentPos_l = yy_currentPos = 
                       yy_startRead = yy_markedPos_l;
  
--- start admin (lexstate etc)

      yy_forAction: {
        while (true) {
    
--- next input, line, col, char count, next transition, isFinal action
            yy_action = yy_state; 
            yy_markedPos_l = yy_currentPos_l; 
--- line count update
          }

        }
      }

      // store back cached position
      yy_markedPos = yy_markedPos_l;
--- char count update

      switch (yy_action) {

--- actions
        default: 
          if (yy_input == YYEOF && yy_startRead == yy_currentPos) {
            yy_atEOF = true;
--- eofvalue
          } 
          else {
--- no match
          }
      }
    }
  }

--- main

}