code: /* LanguageTool, a natural language style checker
   * Copyright (C) 2021 Sohaib Afifi, Taha Zerrouki
   *
   * 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
   * USA
   */
  package org.languagetool.tools;
  
  import java.text.Normalizer;
  
  /**
   * Tools for working with arabic strings.
   *
   * @author Taha Zerrouki
   */
  public class ArabicStringTools {
  
    public static final String TASHKEEL_CHARS =
      "\u064B"    // Fathatan
      + "\u064C"  // Dammatan
      + "\u064D"  // Kasratan
      + "\u064E"  // Fatha
      + "\u064F"  // Damma
      + "\u0650"  // Kasra
      + "\u0651"  // Shadda
      + "\u0652"  // Sukun
      + "\u0653"  // Maddah Above
      + "\u0654"  // Hamza Above
      + "\u0655"  // Hamza Below
      + "\u0656"  // Subscript Alef
      + "\u0640"; // Tatweel
  
    /**
     * Return <code>str</code> without tashkeel characters
     * @param str input str
     */
    public static String removeTashkeel(String str) {
       String striped = str.replaceAll("["
        + TASHKEEL_CHARS
        + "]", "");
       return striped;
     }
  }
  