/**
 * Copyright (C) 2009 eXo Platform SAS.
 *
 * This 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 software 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 software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.exoplatform.services.xml.parser;

import org.exoplatform.services.chars.CharsUtil;
import org.exoplatform.services.chars.SpecChar;
import org.exoplatform.services.html.refs.RefsDecoder;
import org.exoplatform.services.token.TypeToken;
import org.exoplatform.services.token.TokenParser.Factory;

/**
 *  Author : Nhu Dinh Thuan
 *          Email:nhudinhthuan@yahoo.com
 * Sep 17, 2006
 */
@SuppressWarnings("serial")
public class XMLToken extends Factory<XMLNode>
{

   private XMLNode xmlType;

   private RefsDecoder refs;

   public XMLToken()
   {
      refs = new RefsDecoder();
   }

   public int create(char[] data, int start, int end, int type)
   {
      if (start >= end)
         return end;
      if (start > data.length)
         return data.length;
      char[] value = CharsUtil.cutAndTrim(data, start, Math.min(end, data.length));
      if (value.length < 1)
         return end;
      if (type != TypeToken.TAG)
      {
         value = refs.decode(value);
         push(new XMLNode(value, null, type));
         return end;
      }
      if (value[0] == SpecChar.END_TAG)
      {
         if (value.length <= 1)
            return end;
         value = CharsUtil.cutAndTrim(value, 1, value.length);
         push(new XMLNode(value, new String(value), TypeToken.CLOSE));
         return end;
      }
      String nameValue = new String(CharsUtil.cutBySpace(value, 0));
      if (value[value.length - 1] == SpecChar.QUESTION_MASK && value[0] == SpecChar.QUESTION_MASK)
      {
         xmlType = new XMLNode(value, nameValue, TypeToken.SINGLE);
      }
      else
      {
         push(new XMLNode(value, nameValue, isSingleTag(value)));
      }
      return end;
   }

   int isSingleTag(char[] value)
   {
      if (value[value.length - 1] == SpecChar.END_TAG)
         return TypeToken.SINGLE;
      else if (value[0] == SpecChar.PUNCTUATION_MASK)
         return TypeToken.SINGLE;
      return TypeToken.TAG;
   }

   public XMLNode getXmlType()
   {
      return xmlType;
   }

}
