Remove APIs from utils

[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 c94db9d3044655540e0991fd4fa6393c8dc499f5..8810d646335056a604791cec8a545b27931be1b9 100644 (file)
--- a/org.argeo.util/src/org/argeo/util/LangUtils.java
+++ b/org.argeo.util/src/org/argeo/util/LangUtils.java
@@ -1,8 +1,19 @@
 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.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 {
        /*
@@ -24,7 +35,7 @@ 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) {
@@ -72,6 +83,81 @@ public class LangUtils {
                return sb.toString();
        }
 
+       public 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);
+               }
+       }
+
+       public 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');
+                       }
+               }
+       }
+
+       public 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());
+       }
+
        /** Singleton constructor. */
        private LangUtils() {