TimestampArgument support for RFC 3339

Updated the TimestampArgument class to allow it to accept timestamps
in the ISO 8601 format described in RFC 3339.

docs/release-notes.html

@@ -26,6 +26,12 @@ <h3>Version 6.0.11</h3>
                   <br><br>
                 </li>
 
+                <li>
+                  Updated the TimestampArgument class to allow it to accept timestamps in the ISO
+                  8601 format described in RFC 3339.
+                  <br><br>
+                </li>
+
                 <li>
                   Updated client-side support for the LDIF export administrative task in the Ping
                   Identity Directory Server to allow requesting that the server invoke one or more

src/com/unboundid/util/args/TimestampArgument.java

@@ -63,6 +63,7 @@
  * timestamp values.  Values may be provided in any of the following formats:
  * <UL>
  *   <LI>Any valid generalized time format.</LI>
+ *   <LI>Any valid ISO 8601 timestamp in the format described in RFC 3339.</LI>
  *   <LI>A local time zone timestamp in the format YYYYMMDDhhmmss.uuu</LI>
  *   <LI>A local time zone timestamp in the format YYYYMMDDhhmmss</LI>
  *   <LI>A local time zone timestamp in the format YYYYMMDDhhmm</LI>
@@ -370,6 +371,18 @@ public static Date parseTimestamp(@NotNull final String s)
     }
 
 
+    // First, try to parse the value as a timestamp formatted in the ISO 8601
+    // format specified in RFC 3339.
+    try
+    {
+      return StaticUtils.decodeRFC3339Time(s);
+    }
+    catch (final Exception e)
+    {
+      // This is fine.  It just means the value isn't in the RFC 3339 format.
+    }
+
+
     // See if the length of the string matches one of the supported local
     // formats.  If so, get a format string that we can use to parse the value.
     final String dateFormatString;

tests/unit/src/com/unboundid/util/args/TimestampArgumentTestCase.java

@@ -294,6 +294,8 @@ public void testParseTimestamp()
     assertNotNull(TimestampArgument.parseTimestamp("201601011234Z"));
     assertNotNull(TimestampArgument.parseTimestamp("2016010112Z"));
 
+    assertNotNull(TimestampArgument.parseTimestamp("2016-01-01T12:34:56.789Z"));
+
     assertNotNull(TimestampArgument.parseTimestamp("20160101123456.789"));
     assertNotNull(TimestampArgument.parseTimestamp("20160101123456"));
     assertNotNull(TimestampArgument.parseTimestamp("201601011234"));