DateUtils.java

package com.laytonsmith.PureUtilities.Common;

import java.util.Calendar;

/**
 *
 * 
 */
public final class DateUtils {
    
    private DateUtils(){}
    
    /**
     * Convenience notation for ParseCalendarNotation(name, null)
     */
    public static String ParseCalendarNotation(String name) {
        return ParseCalendarNotation(name, null);
    }

    /**
     * Parses a calendar notation. The following patterns are replaced with the following:
     * <table>
     * <tr><td>%Y</td><td>Year</td></tr>
     * <tr><td>%M</td><td>Month</td></tr>
     * <tr><td>%D</td><td>Day</td></tr>
     * <tr><td>%h</td><td>Hour</td></tr>
     * <tr><td>%m</td><td>Minute</td></tr>
     * <tr><td>%s</td><td>Second</td></tr>
     * </table>
     * 
     * A generally standard format for human readable logs is: %Y-%M-%D %h:%m.%s
     * @param name
     * @param c
     * @return 
     */
    public static String ParseCalendarNotation(String name, Calendar c) {
        if (c == null) {
            c = Calendar.getInstance();
        }
        String year = String.format("%04d", c.get(Calendar.YEAR));
        String month = String.format("%02d", 1 + c.get(Calendar.MONTH)); //January is 0
        String day = String.format("%02d", c.get(Calendar.DAY_OF_MONTH));
        String hour = String.format("%02d", c.get(Calendar.HOUR));
        String minute = String.format("%02d", c.get(Calendar.MINUTE));
        String second = String.format("%02d", c.get(Calendar.SECOND));
        return name.replaceAll("%Y", year).replaceAll("%M", month)
                .replaceAll("%D", day).replaceAll("%h", hour)
                .replaceAll("%m", minute).replaceAll("%s", second);
    }
}