CalendarUtil.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2011 Lluis Turró Cutiller <http://www.turro.org/>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.turro.html.calendar;
 
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;
import java.util.Locale;
 
public class CalendarUtil {
  
  private CalendarUtil() {
  }
  
  public static void positionFirstCell(Calendar date) {
    date.set(Calendar.DAY_OF_MONTH, 1);
    int first = date.getFirstDayOfWeek();
    while(date.get(Calendar.DAY_OF_WEEK) != first)
      date.add(Calendar.DAY_OF_MONTH, -1);
  }
  
  public static String[] getDayNames(Locale locale) {
    return getDayNames(locale, false);
  }
  
  public static String[] getDayNames(Locale locale, boolean small) {
    Calendar date = Calendar.getInstance(locale);
    SimpleDateFormat fmtDayWeek = new SimpleDateFormat((small ? "EE" : "EEEE"), locale);
    int curr = date.getFirstDayOfWeek(), idx = 0;
    date.set(Calendar.DAY_OF_WEEK, curr);
    List dayNames = new ArrayList();
    while(true) {
      dayNames.add(fmtDayWeek.format(date.getTime()));
      idx++; curr++;
      if(idx >= 7) break;
      if(curr > 7) curr = 1;
      date.set(Calendar.DAY_OF_WEEK, curr);
    }
    return (String[])dayNames.toArray(new String[0]);
  }
  
  public static String[] getMonthNames(Locale locale) {
    return getMonthNames(locale, false);
  }
  
  public static String[] getMonthNames(Locale locale, boolean small) {
    Calendar date = Calendar.getInstance(locale);
    SimpleDateFormat fmtMonth = new SimpleDateFormat((small ? "MMM" : "MMMM"), locale);
    List monthNames = new ArrayList();
    for(int m = 0; m < 12; m++) {
      date.set(Calendar.MONTH, m);
      monthNames.add(fmtMonth.format(date.getTime()));
    }
    return (String[])monthNames.toArray(new String[0]);
  }
  
}