/**
 * 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.chars;


/**
 * Created by The eXo Platform SARL
 * Author : Nhu Dinh Thuan
 *          thuan.nhu@exoplatform.com
 * Sep 13, 2006
 */
public final class CharsUtil
{

   public static int indexOf(char[] value, char[] c, int start)
   {
      boolean is = false;
      for (int i = start; i < value.length; i++)
      {
         is = true;
         for (int j = 0; j < c.length; j++)
         {
            if (i + j < value.length && c[j] == value[i + j])
               continue;
            is = false;
            break;
         }
         if (is)
            return i;
      }
      return -1;
   }

   public static char[] cutAndTrim(char[] data, int start, int end)
   {
      int s = start;
      int e = end - 1;
      while (s < end)
      {
         if (!Character.isWhitespace(data[s]))
            break;
         s++;
      }
      while (e > start)
      {
         if (!Character.isWhitespace(data[e]))
            break;
         e--;
      }
      e++;
      if (e <= s)
         return new char[0];
      char[] newChar = new char[e - s];
      System.arraycopy(data, s, newChar, 0, newChar.length);
      return newChar;
   }

   public static char[] cutBySpace(char[] data, int start)
   {
      int e = start;
      while (e < data.length)
      {
         if (Character.isWhitespace(data[e]))
            break;
         e++;
      }
      if (e <= start)
         return new char[0];
      char[] newChar = new char[e - start];
      System.arraycopy(data, start, newChar, 0, newChar.length);
      return newChar;
   }

   public static int indexOfIgnoreCase(char[] value, char[] c, int start)
   {
      boolean is = false;
      for (int i = start; i < value.length; i++)
      {
         is = true;
         for (int j = 0; j < c.length; j++)
         {
            if (Character.toLowerCase(c[j]) == Character.toLowerCase(value[i + j]))
               continue;
            is = false;
            break;
         }
         if (is)
            return i;
      }
      return -1;
   }

   public static int indexOf(char[] value, char c, int start)
   {
      for (int i = start; i < value.length; i++)
      {
         if (c == value[i])
            return i;
      }
      return -1;
   }

   /* public static void main(String args[]){
      String yahoo =" nhu dinh thuan nhu      dinh  ";
      String pattern = "dinh";
      System.out.println(indexOf(yahoo.toCharArray(), pattern.toCharArray(), 7));
      System.out.println(indexOf(yahoo.toCharArray(), 'd', 0));
      pattern = "DiNh";
      System.out.println(indexOf(yahoo.toCharArray(), pattern.toCharArray(), 7));
      System.out.println(indexOfIgnoreCase(yahoo.toCharArray(), pattern.toCharArray(), 7));

      char [] data = cutAndTrim(yahoo.toCharArray(), 19, 31);
      System.out.println("|"+new String(data)+"|");
      data = cutBySpace(yahoo.toCharArray(), 1);
      System.out.println("|"+new String(data)+"|");
    }*/
}
