+ /*
+ * EXCEPTIONS
+ */
+ /**
+ * Chain the messages of all causes (one per line, <b>starts with a line
+ * return</b>) without all the stack
+ */
+ public static String chainCausesMessages(Throwable t) {
+ StringBuffer buf = new StringBuffer();
+ chainCauseMessage(buf, t);
+ return buf.toString();
+ }
+
+ /** Recursive chaining of messages */
+ private static void chainCauseMessage(StringBuffer buf, Throwable t) {
+ buf.append('\n').append(' ').append(t.getClass().getCanonicalName()).append(": ").append(t.getMessage());
+ if (t.getCause() != null)
+ chainCauseMessage(buf, t.getCause());
+ }
+
+ /*
+ * TIME
+ */
+ /** Formats time elapsed since start. */
+ public static String since(ZonedDateTime start) {
+ ZonedDateTime now = ZonedDateTime.now();
+ return duration(start, now);
+ }
+
+ /** Formats a duration. */
+ public static String duration(Temporal start, Temporal end) {
+ long count = ChronoUnit.DAYS.between(start, end);
+ if (count != 0)
+ return count > 1 ? count + " days" : count + " day";
+ count = ChronoUnit.HOURS.between(start, end);
+ if (count != 0)
+ return count > 1 ? count + " hours" : count + " hours";
+ count = ChronoUnit.MINUTES.between(start, end);
+ if (count != 0)
+ return count > 1 ? count + " minutes" : count + " minute";
+ count = ChronoUnit.SECONDS.between(start, end);
+ return count > 1 ? count + " seconds" : count + " second";
+ }
+