X-Git-Url: http://git.argeo.org/?a=blobdiff_plain;f=org.argeo.util%2Fsrc%2Forg%2Fargeo%2Futil%2FLangUtils.java;h=b791f490d10dbf1146450d3b17a7eeac08927bdc;hb=726748983890c7f6d1be2e652a234dd2ada47ed9;hp=3c0baed1c8047ad0c9cccb10a77c12a84def8912;hpb=2d6b7c0c3badea29451c4d8e41ebb5aca2258806;p=lgpl%2Fargeo-commons.git

diff --git a/org.argeo.util/src/org/argeo/util/LangUtils.java b/org.argeo.util/src/org/argeo/util/LangUtils.java
index 3c0baed1c..b791f490d 100644
--- 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;
@@ -38,7 +41,7 @@ public class LangUtils {
 	 * Creates a new {@link Dictionary} with one key-value pair (neither key not
 	 * value should be null)
 	 */
-	public static Dictionary<String, Object> init(String key, Object value) {
+	public static Dictionary<String, Object> dico(String key, Object value) {
 		assert key != null;
 		assert value != null;
 		Hashtable<String, Object> props = new Hashtable<>();
@@ -54,11 +57,11 @@ public class LangUtils {
 		return new DictionaryKeys(props);
 	}
 
-	public static String toJson(Dictionary<String, ?> props) {
+	static String toJson(Dictionary<String, ?> props) {
 		return toJson(props, false);
 	}
 
-	public static String toJson(Dictionary<String, ?> props, boolean pretty) {
+	static String toJson(Dictionary<String, ?> props, boolean pretty) {
 		StringBuilder sb = new StringBuilder();
 		sb.append('{');
 		if (pretty)
@@ -83,7 +86,7 @@ public class LangUtils {
 		return sb.toString();
 	}
 
-	public static void storeAsProperties(Dictionary<String, Object> props, Path path) throws IOException {
+	static void storeAsProperties(Dictionary<String, Object> props, Path path) throws IOException {
 		if (props == null)
 			throw new IllegalArgumentException("Props cannot be null");
 		Properties toStore = new Properties();
@@ -96,7 +99,7 @@ public class LangUtils {
 		}
 	}
 
-	public static void appendAsLdif(String dnBase, String dnKey, Dictionary<String, Object> props, Path path)
+	static void appendAsLdif(String dnBase, String dnKey, Dictionary<String, Object> props, Path path)
 			throws IOException {
 		if (props == null)
 			throw new IllegalArgumentException("Props cannot be null");
@@ -126,7 +129,7 @@ public class LangUtils {
 		}
 	}
 
-	public static Dictionary<String, Object> loadFromProperties(Path path) throws IOException {
+	static Dictionary<String, Object> loadFromProperties(Path path) throws IOException {
 		Properties toLoad = new Properties();
 		try (InputStream in = Files.newInputStream(path)) {
 			toLoad.load(in);
@@ -137,6 +140,50 @@ public class LangUtils {
 		return res;
 	}
 
+	/*
+	 * 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";
+	}
+
 	/** Singleton constructor. */
 	private LangUtils() {