Initial check-in.

src/main/java/com/messners/gitlab/api/ISO8601.java

+package com.messners.gitlab.api;
+
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Calendar;
+import java.util.Date;
+import java.util.TimeZone;
+
+public class ISO8601 {
+	public static final String PATTERN = "yyyy-MM-dd'T'HH:mm:ssZ";
+	public static final String OUTPUT_PATTERN = "yyyy-MM-dd'T'HH:mm:ss'Z'";
+	public static final String ALTERNATE_PATTERN = "yyyy-MM-dd HH:mm:ss";
+
+	private static final SimpleDateFormat iso8601Format;
+	private static final SimpleDateFormat iso8601OutputFormat;
+	private static final SimpleDateFormat iso8601AlternateFormat;
+	static { 
+		iso8601Format = new SimpleDateFormat(PATTERN);
+		iso8601Format.setLenient(true);
+		iso8601Format.setTimeZone(TimeZone.getTimeZone("GMT"));  
+		iso8601OutputFormat = new SimpleDateFormat(OUTPUT_PATTERN);
+		iso8601OutputFormat.setLenient(true);
+		iso8601OutputFormat.setTimeZone(TimeZone.getTimeZone("GMT"));  
+		iso8601AlternateFormat = new SimpleDateFormat(ALTERNATE_PATTERN);
+		iso8601AlternateFormat.setLenient(true);
+		iso8601AlternateFormat.setTimeZone(TimeZone.getTimeZone("GMT"));  
+	}
+	
+	public static String getTimestamp () {
+		return iso8601Format.format(new Date());
+	}
+
+	public static String toString (Calendar cal) {
+		
+		if (cal == null) {
+			return (null);
+		}
+
+		return toString(cal.getTime());
+	}
+
+	public static synchronized String toString (Date date) {
+		
+		if (date == null) {
+			return (null);
+		}
+		
+		return iso8601OutputFormat.format(date);
+	}
+	
+	public static Date toDate (String dateTimeString) throws ParseException {
+		
+		if (dateTimeString == null) {
+			return (null);
+		}
+		
+		dateTimeString = dateTimeString.trim();
+
+		SimpleDateFormat fmt;
+		if (dateTimeString.length() > 10) {
+			fmt = (dateTimeString.charAt(10) == 'T' ? 
+					(dateTimeString.endsWith("Z") ? iso8601OutputFormat : iso8601Format) : iso8601AlternateFormat);
+		} else {
+			fmt = iso8601Format;
+		}
+
+		synchronized (fmt) {
+			return (fmt.parse(dateTimeString));
+		}		
+	}
+
+	public static Calendar toCalendar (String dateTimeString) throws ParseException {
+
+		Date date = toDate(dateTimeString);
+		Calendar cal = Calendar.getInstance();
+		cal.setTime(date);
+		return (cal);
+	}
+}