source: ether_ndacc/trunk/implementation/com/ether/DateUtils.java @ 97

package com.ether;

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

public abstract class DateUtils
{
    /**
     * Set the date with a default locale (french)
     *
     * @param date date to formate
     * @return a new date set to midnight
     */
    public static Date to00h00m00s( final Date date )
    {
        assert ( null != date );
        final Calendar calendar = Calendar.getInstance( Locale.FRENCH );

        return setMinimumFields( date, calendar );
    }

    /**
     * Set the date with a default locale (french)
     *
     * @param date date to formate
     * @return a new date set to 23h 59m 59s
     */
    public static Date to23h59m59s( final Date date )
    {
        assert ( null != date );
        final Calendar calendar = Calendar.getInstance( Locale.FRENCH );

        return setMaximumFields( date, calendar );
    }

    /**
     * Set the date using the given locale
     *
     * @param locale locale to use
     * @param date   date to formate
     * @return a new date set to midnight
     */
    public static Date to00h00m00s( final Locale locale, final Date date )
    {
        assert ( null != date );
        final Calendar calendar = Calendar.getInstance( locale );

        return setMinimumFields( date, calendar );
    }

    /**
     * Set the date using the given locale
     *
     * @param locale locale to use
     * @param date   date to formate
     * @return a new date set to 23h 59m 59s
     */
    public static Date to23h59m59s( final Locale locale, final Date date )
    {
        assert ( null != date );
        final Calendar calendar = Calendar.getInstance( locale );

        return setMaximumFields( date, calendar );
    }


    private static Date setMinimumFields( final Date date, final Calendar calendar )
    {
        calendar.setTime( date );
        calendar.set( Calendar.HOUR_OF_DAY, calendar.getMinimum( Calendar.HOUR_OF_DAY ) );
        calendar.set( Calendar.MINUTE, calendar.getMinimum( Calendar.MINUTE ) );
        calendar.set( Calendar.SECOND, calendar.getMinimum( Calendar.SECOND ) );

        return calendar.getTime();
    }

    private static Date setMaximumFields( final Date date, final Calendar calendar )
    {
        calendar.setTime( date );
        calendar.set( Calendar.HOUR_OF_DAY, calendar.getMaximum( Calendar.HOUR_OF_DAY ) );
        calendar.set( Calendar.MINUTE, calendar.getMaximum( Calendar.MINUTE ) );
        calendar.set( Calendar.SECOND, calendar.getMaximum( Calendar.SECOND ) );

        return calendar.getTime();
    }

    public static String shortFormatFrench( final Date date )
    {
        return formatDate( date, FRENCH_DATE_PATTERN_SHORT );
    }

    public static String shortFormat( final Date date, final Locale locale )
    {
        if( date == null )
            return "";

        final DateFormat dateFormat = DateFormat.getDateInstance( DateFormat.SHORT, locale );

        return dateFormat.format( date );
    }

    public static String orderedFormat( final Date date )
    {
        return formatDate( date, ORDERED_FORMAT );
    }

    public static String orderedFormatPlusGMT( final Date date )
    {
        return formatDate( date, ORDERED_FORMAT_PLUS_GMT );
    }

    public static String formatDate( final Date date, final String format )
    {
        if( date == null )
            return "";

        final SimpleDateFormat simpleDateFormat = new SimpleDateFormat( format );
        return simpleDateFormat.format( date );
    }
    
    public static Date datesAddMonth(final Date inputDate, final int number) 
    {
        /*final DateFormat shortDateFormat = new SimpleDateFormat("MMyyyy");
        final DateFormat completDateFormat = new SimpleDateFormat("dd-MM-yyyy");             
        final Date firstMois = shortDateFormat.parse("102008");
        final String firstMoisString = completDateFormat.format(firstMois);*/
        
        final Calendar calendar = Calendar.getInstance();
        calendar.setTime(inputDate);
        calendar.add(Calendar.MONTH, number);
         
        return calendar.getTime();
        //final String secondMoisString = completDateFormat.format(secondMois);
                 
    } 

    public static Date datesAddYear(final Date inputDate, final int number) 
    {
        
        final Calendar calendar = Calendar.getInstance();
        calendar.setTime(inputDate);
        calendar.add(Calendar.YEAR, number);
         
        return calendar.getTime();
        //final String secondMoisString = completDateFormat.format(secondMois);
                 
    } 
    public static final String FRENCH_DATE_PATTERN_SHORT = "dd/MM/yyyy";
    public static final String ENGLISH_DATE_PATTERN_SHORT = "MM/dd/yyyy";
    public static final String CHINESE_DATE_PATTERN_SHORT = "yyyy/MM/dd";

    public static final String ORDERED_FORMAT_PLUS_GMT = "yyyy-MM-dd HH:mm:ss.SSSS Z";
    public static final String ORDERED_FORMAT = "yyyy-MM-dd HH:mm:ss.SSSS";
}