/*********************************************************************
*
*      Copyright (C) 2002 Andrew Khan
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
***************************************************************************/

package jxl.biff.formula;

import jxl.biff.IntegerHelper;

/**
 * A "holding" token for a range separator.  This token gets instantiated
 * when the lexical analyzer can't distinguish a range cleanly, eg in the
 * case where where one of the identifiers of the range is a formula
 */
class RangeSeparator extends BinaryOperator implements ParsedThing
{
  /** 
   * Constructor
   */
  public RangeSeparator()
  {
  }

  public String getSymbol()
  {
    return ":";
  }

  /**
   * Abstract method which gets the token for this operator
   *
   * @return the string symbol for this token
   */
  Token getToken()
  {
    return Token.RANGE;
  }

  /**
   * Gets the precedence for this operator.  Operator precedents run from 
   * 1 to 5, one being the highest, 5 being the lowest
   *
   * @return the operator precedence
   */
  int getPrecedence()
  {
    return 1;
  }

  /**
   * Overrides the getBytes() method in the base class and prepends the 
   * memFunc token
   *
   * @return the bytes
   */
  byte[] getBytes()
  {
    setVolatile();
    setOperandAlternateCode();

    byte[] funcBytes = super.getBytes();

    byte[] bytes = new byte[funcBytes.length+3];
    System.arraycopy(funcBytes, 0, bytes, 3, funcBytes.length);
    
    // Indicate the mem func 
    bytes[0] = Token.MEM_FUNC.getCode();
    IntegerHelper.getTwoBytes(funcBytes.length, bytes, 1);

    return bytes;
  }
  
}