weekdaymapper.java

Rapla是一个灵活的多用户资源管理系统。它提供的一些功能有：日历GUI

/*--------------------------------------------------------------------------*
 | Copyright (C) 2006 Christopher Kohlhaas, Bettina Lademann                |
 |                                                                          |
 | This program is free software; you can redistribute it and/or modify     |
 | it under the terms of the GNU General Public License as published by the |
 | Free Software Foundation. A copy of the license has been included with   |
 | these distribution in the COPYING file, if not go to www.fsf.org         |
 |                                                                          |
 | As a special exception, you are granted the permissions to link this     |
 | program with every library, which license fulfills the Open Source       |
 | Definition as published by the Open Source Initiative (OSI).             |
 *--------------------------------------------------------------------------*/
package org.rapla.components.calendarview;

import java.util.Calendar;
import java.util.Locale;
import java.text.SimpleDateFormat;


/** maps weekday names to Calendar.DAY_OF_WEEK.
    Example:
   <pre>
       WeekdayMapper mapper = new WeekdayMapper();
       // print name of Sunday
       System.out.println(mapper.getName(Calendar.SUNDAY));
       // Create a weekday ComboBox
       JComboBox comboBox = new JComboBox();
       comboBox.setModel(new DefaultComboBoxModel(mapper.getNames()));
       // select sunday
       comboBox.setSelectedIndex(mapper.getIndexForDay(Calendar.SUNDAY));
       // weekday == Calendar.SUNDAY
       int weekday = mapper.getDayForIndex(comboBox.getSelectedIndex());
   </pre>

*/
public class WeekdayMapper {
    String[] weekdayNames;
    int[] weekday2index;
    int[] index2weekday;

    public WeekdayMapper() {
        this(Locale.getDefault());
    }

    public WeekdayMapper(Locale locale) {
        weekdayNames = new String[7];
        weekday2index = new int[8];
        index2weekday = new int[8];
        SimpleDateFormat format = new SimpleDateFormat("EEEEEE",locale);
        Calendar calendar = Calendar.getInstance(locale);
        calendar.set(Calendar.DAY_OF_WEEK, calendar.getFirstDayOfWeek());
        for (int i=0;i<7;i++) {
            weekday2index[calendar.get(Calendar.DAY_OF_WEEK)] = i;
            index2weekday[i] = calendar.get(Calendar.DAY_OF_WEEK);
            weekdayNames[i] = format.format(calendar.getTime());
            calendar.add(Calendar.DATE,1);
        }
    }

    public String[] getNames() {
        return weekdayNames;
    }

    public String getName(int weekday) {
        return getNames()[indexForDay(weekday)];
    }

    public int dayForIndex(int index) {
        return index2weekday[index];
    }

    public int indexForDay(int weekday) {
        return weekday2index[weekday];
    }

}