Index: lutinutil/src/java/org/codelutin/option/Config.java
diff -u lutinutil/src/java/org/codelutin/option/Config.java:1.1 lutinutil/src/java/org/codelutin/option/Config.java:1.2
--- lutinutil/src/java/org/codelutin/option/Config.java:1.1	Sun Dec 30 22:50:46 2007
+++ lutinutil/src/java/org/codelutin/option/Config.java	Tue Jan  1 17:26:18 2008
@@ -409,6 +409,44 @@
     }
 
     /**
+     *
+     * @throws IOException if any 
+     */
+    protected void loadFromSource() throws IOException {
+        if (source != null) {
+            return;
+        }
+        load(source.toURL().openStream());
+    }
+
+    protected void loadFromDefaultValue() throws IOException {
+        for (ConfigPropertyKey propertyKey : universe) {
+            Object defaultValue = propertyKey.getDefaultValue();
+            if (defaultValue != null) {
+                setProperty(propertyKey, defaultValue);
+            }
+        }
+    }
+
+    protected void loadFromSystem() {
+        for (ConfigPropertyKey propertyKey : universe) {
+            Object val = System.getProperty(propertyKey.getKey());
+            if (val != null) {
+                setProperty(propertyKey, val);
+            }
+        }
+    }
+
+    protected void loadFromEnv() {
+        for (ConfigPropertyKey propertyKey : universe) {
+            Object val = System.getenv(propertyKey.getKey());
+            if (val != null) {
+                setProperty(propertyKey, val);
+            }
+        }
+    }
+
+    /**
      * Set a value for a given property using his <code>def</code> and update
      * also the list of keys used.
      *