X-Git-Url: https://git.argeo.org/?a=blobdiff_plain;f=org.argeo.util%2Fsrc%2Forg%2Fargeo%2Futil%2FLangUtils.java;h=b791f490d10dbf1146450d3b17a7eeac08927bdc;hb=0d46a59c2e2a704b617c1a665fa5155bd4e40682;hp=c94db9d3044655540e0991fd4fa6393c8dc499f5;hpb=06acf73a99f0e3908fe8998f1ff08dee109c5562;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 c94db9d30..b791f490d 100644
--- a/org.argeo.util/src/org/argeo/util/LangUtils.java
+++ b/org.argeo.util/src/org/argeo/util/LangUtils.java
@@ -1,8 +1,22 @@
 package org.argeo.util;
 
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+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;
+import java.util.Properties;
+
+import javax.naming.InvalidNameException;
+import javax.naming.ldap.LdapName;
 
 public class LangUtils {
 	/*
@@ -24,10 +38,10 @@ public class LangUtils {
 	 */
 
 	/**
-	 * Creates a new {@link Dictionary} with one key-value pair (neith key not
+	 * 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<>();
@@ -43,11 +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)
@@ -72,6 +86,104 @@ public class LangUtils {
 		return sb.toString();
 	}
 
+	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();
+		for (Enumeration<String> keys = props.keys(); keys.hasMoreElements();) {
+			String key = keys.nextElement();
+			toStore.setProperty(key, props.get(key).toString());
+		}
+		try (OutputStream out = Files.newOutputStream(path)) {
+			toStore.store(out, null);
+		}
+	}
+
+	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");
+		Object dnValue = props.get(dnKey);
+		String dnStr = dnKey + '=' + dnValue + ',' + dnBase;
+		LdapName dn;
+		try {
+			dn = new LdapName(dnStr);
+		} catch (InvalidNameException e) {
+			throw new IllegalArgumentException("Cannot interpret DN " + dnStr, e);
+		}
+		if (dnValue == null)
+			throw new IllegalArgumentException("DN key " + dnKey + " must have a value");
+		try (Writer writer = Files.newBufferedWriter(path, StandardOpenOption.APPEND, StandardOpenOption.CREATE)) {
+			writer.append("\ndn: ");
+			writer.append(dn.toString());
+			writer.append('\n');
+			for (Enumeration<String> keys = props.keys(); keys.hasMoreElements();) {
+				String key = keys.nextElement();
+				Object value = props.get(key);
+				writer.append(key);
+				writer.append(": ");
+				// FIXME deal with binary and multiple values
+				writer.append(value.toString());
+				writer.append('\n');
+			}
+		}
+	}
+
+	static Dictionary<String, Object> loadFromProperties(Path path) throws IOException {
+		Properties toLoad = new Properties();
+		try (InputStream in = Files.newInputStream(path)) {
+			toLoad.load(in);
+		}
+		Dictionary<String, Object> res = new Hashtable<String, Object>();
+		for (Object key : toLoad.keySet())
+			res.put(key.toString(), toLoad.get(key));
+		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() {