001    /**
002     * =========================================
003     * LibFormula : a free Java formula library
004     * =========================================
005     *
006     * Project Info:  http://reporting.pentaho.org/libformula/
007     *
008     * (C) Copyright 2006-2007, by Pentaho Corporation and Contributors.
009     *
010     * This library is free software; you can redistribute it and/or modify it under the terms
011     * of the GNU Lesser General Public License as published by the Free Software Foundation;
012     * either version 2.1 of the License, or (at your option) any later version.
013     *
014     * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
015     * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
016     * See the GNU Lesser General Public License for more details.
017     *
018     * You should have received a copy of the GNU Lesser General Public License along with this
019     * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
020     * Boston, MA 02111-1307, USA.
021     *
022     * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
023     * in the United States and other countries.]
024     *
025     *
026     * ------------
027     * $Id: ParserTools.java 4483 2008-02-20 12:07:43Z tmorgner $
028     * ------------
029     * (C) Copyright 2006-2007, by Pentaho Corporation.
030     */
031    package org.jfree.formula.parser;
032    
033    /**
034     * Creation-Date: 03.11.2006, 18:57:23
035     *
036     * @author Thomas Morgner
037     */
038    public class ParserTools
039    {
040      private ParserTools()
041      {
042      }
043    
044      /**
045       * Unconditionally removes the first and last character of the given string and also unquotes the quoted double-quotes.
046       *
047       * @param s the string to be stripped.
048       * @return the stripped string.
049       */
050      public static String stripQuote(final String s)
051      {
052        boolean encounteredQuote = false;
053    
054        final StringBuffer b = new StringBuffer(s.length() - 2);
055        final int size = s.length() - 1;
056        for (int i = 1; i < size; i++)
057        {
058          final char c = s.charAt(i);
059          if (encounteredQuote)
060          {
061            if (c == '"')
062            {
063              encounteredQuote = false;
064              continue;
065            }
066          }
067          if (c == '"')
068          {
069            encounteredQuote = true;
070          }
071          else
072          {
073            encounteredQuote = false;
074          }
075          b.append(c);
076        }
077        return b.toString();
078      }
079    
080    }