Index: topia/src/java/org/codelutin/topia/TopiaContext.java
diff -u topia/src/java/org/codelutin/topia/TopiaContext.java:1.25 topia/src/java/org/codelutin/topia/TopiaContext.java:1.26
--- topia/src/java/org/codelutin/topia/TopiaContext.java:1.25	Wed Jun 16 09:41:26 2004
+++ topia/src/java/org/codelutin/topia/TopiaContext.java	Mon Jul  5 10:48:41 2004
@@ -23,10 +23,10 @@
  *
  * @author Benjamin Poussin <poussin@codelutin.com>
  * Copyright Code Lutin
- * @version $Revision: 1.25 $
+ * @version $Revision: 1.26 $
  *
- * Mise a jour: $Date: 2004/06/16 09:41:26 $
- * par : $Author: bpoussin $
+ * Mise a jour: $Date: 2004/07/05 10:48:41 $
+ * par : $Author: pineau $
  */
 
 package org.codelutin.topia;
@@ -69,18 +69,18 @@
     protected TopiaPersistenceHelper persistenceHelper = null;
     protected Cache cache = new Cache();
 
-    public static TopiaContext getContext() throws TopiaException {
-        return getContext(((Properties)null));
+    public static TopiaContext instantiateContext() throws TopiaException {
+        return instantiateContext(((Properties)null));
     }
 
-    public static TopiaContext getContext(String propertiesFileName) throws TopiaException {
+    public static TopiaContext instantiateContext(String propertiesFileName) throws TopiaException {
         if (propertiesFileName == null) {
-            return getContext(((Properties)null));
+            return instantiateContext(((Properties)null));
         }
-        return getContext(getProperties(propertiesFileName));
+        return instantiateContext(getProperties(propertiesFileName));
     }
 
-    public static TopiaContext getContext(Properties properties)
+    public static TopiaContext instantiateContext(Properties properties)
         throws TopiaException {
         TopiaContext context = (TopiaContext) contexts.get(properties);
         if (context == null) {
@@ -418,7 +418,11 @@
     * @return le nom de la classe a souhaitée, null si pas de classe trouvé
     */
     public String getInterfaceName(String category, Class clazz) {
-        return getProperty("mapping."+category+".interface."+clazz.getName());
+    	String result =getProperty("mapping."+category+".interface."+clazz.getName());
+    	if (result == null) {
+    		throw new RuntimeException("Can't find mapping for "+category+".interface."+clazz.getName()); 
+    	}
+        return result;
     }
 
     public String getPersistenceHelperClassName(){