code: /* LanguageTool, a natural language style checker
   * Copyright (C) 2014 Daniel Naber (http://www.danielnaber.de)
   *
   * 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.rules.ru;
      import org.languagetool.rules.AbstractDateCheckFilter;
      import java.util.Calendar;
      import java.util.Locale;
  
  /**
   * Russian localization of {@link org.languagetool.rules.AbstractDateCheckFilter}.
   * @since 2.7
   */
  public class DateCheckFilter extends AbstractDateCheckFilter {
  
    @Override
    protected Calendar getCalendar() {
      return Calendar.getInstance(Locale.forLanguageTag("ru"));
    }
  
    @SuppressWarnings("ControlFlowStatementWithoutBraces")
    @Override
    protected int getDayOfWeek(String dayStr) {
      String day = dayStr.toLowerCase();
      if (day.startsWith("пн") || day.equals("понедельник")) return Calendar.MONDAY;
      if (day.startsWith("вт")) return Calendar.TUESDAY;
      if (day.startsWith("ср")) return Calendar.WEDNESDAY;
      if (day.startsWith("чт") || day.equals("четверг")) return Calendar.THURSDAY;
      if (day.equals("пт") || day.startsWith ("пятниц")) return Calendar.FRIDAY;
      if (day.startsWith("сб") || day.startsWith ("суббот")) return Calendar.SATURDAY;
      if (day.startsWith("вс") || day.equals("воскресенье")) return Calendar.SUNDAY;
      throw new RuntimeException("Could not find day of week for '" + dayStr + "'");
    }
  
    @Override
    protected String getDayOfWeek(Calendar date) {
      return date.getDisplayName(Calendar.DAY_OF_WEEK, Calendar.LONG, Locale.forLanguageTag("ru"));
    }
  
    @SuppressWarnings({"ControlFlowStatementWithoutBraces", "MagicNumber"})
    @Override
    protected int getMonth(String monthStr) {
      String mon = monthStr.toLowerCase();
      if (mon.equals("январь") || monthStr.equals("I") || mon.equals("января") || mon.equals("янв")) return 1;
      if (mon.equals("февраль") || monthStr.equals("II") ||  mon.equals("февраля") || mon.equals("фев")) return 2;
      if (mon.equals("март") || monthStr.equals("III") || mon.equals("марта") || mon.equals("мар")) return 3;
      if (mon.equals("апрель") || monthStr.equals("IV") || mon.equals("апреля") || mon.equals("апр")) return 4;
      if (mon.equals("май") || monthStr.equals("V") || mon.equals("мая")) return 5;
      if (mon.equals("июнь") || monthStr.equals("VI") || mon.equals("июня") || mon.equals("ин")) return 6;
      if (mon.equals("июль") || monthStr.equals("VII") || mon.equals("июля") || mon.equals("ил")) return 7;
      if (mon.equals("август") || monthStr.equals("VIII") || mon.equals("августа") || mon.equals("авг")) return 8;
      if (mon.equals("сентябрь") || monthStr.equals("IX") || mon.equals("сентября") || mon.equals("сен")) return 9;
      if (mon.equals("октябрь") || monthStr.equals("X") || mon.equals("октября") || mon.equals("окт")) return 10;
      if (mon.equals("ноябрь") || monthStr.equals("XI") || mon.equals("ноября") || mon.equals("ноя")) return 11;
      if (mon.equals("декабрь") || monthStr.equals("XII") || mon.equals("декабря") || mon.equals("дек")) return 12;
      throw new RuntimeException("Could not find month '" + monthStr + "'");
    }
  }
  