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[lgpl/argeo-commons.git] / org.argeo.util / src / org / argeo / util / LangUtils.java

diff --git a/org.argeo.util/src/org/argeo/util/LangUtils.java b/org.argeo.util/src/org/argeo/util/LangUtils.java
index fae6312343d0b99c267298bbecdf8567c6228fc8..b791f490d10dbf1146450d3b17a7eeac08927bdc 100644 (file)
--- a/org.argeo.util/src/org/argeo/util/LangUtils.java
+++ b/org.argeo.util/src/org/argeo/util/LangUtils.java
@@ -7,6 +7,9 @@ import java.io.Writer;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.StandardOpenOption;
+import java.time.ZonedDateTime;
+import java.time.temporal.ChronoUnit;
+import java.time.temporal.Temporal;
 import java.util.Dictionary;
 import java.util.Enumeration;
 import java.util.Hashtable;
@@ -157,6 +160,30 @@ public class LangUtils {
                        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";
+       }
+
        /** Singleton constructor. */
        private LangUtils() {