Index: topia2/src/java/org/codelutin/topia/persistence/TopiaId.java
diff -u /dev/null topia2/src/java/org/codelutin/topia/persistence/TopiaId.java:1.1
--- /dev/null	Fri Jan 13 15:45:14 2006
+++ topia2/src/java/org/codelutin/topia/persistence/TopiaId.java	Fri Jan 13 15:45:09 2006
@@ -0,0 +1,121 @@
+/* *##%
+ * Copyright (C) 2002, 2003 Code Lutin
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *##%*/
+
+/* *
+ * TopiaId.java
+ *
+ * Created: 6 juil. 2004
+ *
+ * @author Benjamin Poussin <poussin@codelutin.com>
+ * Copyright Code Lutin
+ * @version $Revision: 1.1 $
+ *
+ * Mise a jour: $Date: 2006/01/13 15:45:09 $
+ * par : $Author: bpoussin $
+ */
+
+package org.codelutin.topia.persistence;
+
+import java.io.Serializable;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import org.codelutin.topia.TopiaNotFoundException;
+
+/**
+* Classe representant un Id, utilisable par JDO. Cette classe contient aussi un
+* ensemble de methode static utile pour la manipulation des topiaId
+*/
+public class TopiaId implements Serializable { // TopiaId
+
+    public String topiaId = null;
+
+    public TopiaId(){}
+    public TopiaId(String topiaId){
+        this.topiaId = topiaId;
+    }
+
+    public int hashCode (){
+        if(topiaId == null){
+            Logger.getLogger(getClass().getName() + ".hashCode").log(Level.WARNING, "Use null topiaId", new Throwable());
+            return 0;
+        }
+        return topiaId.hashCode();
+    }
+
+    public boolean equals(Object o){
+        return topiaId.equals(o);
+    }
+
+    public String toString(){
+        return topiaId;
+    }
+
+    /**
+    * Cree un topiaId pour une certaine classe
+    */
+    public static String create(Class clazz){
+        if(!clazz.isInterface()){
+            throw new IllegalArgumentException("Only interface is permit to create id: " + clazz);
+        }
+        double random = Math.random();
+        while (Double.toString(random).contains("E-")) {
+            random = Math.random();
+        }
+        return clazz.getName()  + "#" + System.currentTimeMillis() + "#" + random;
+    }
+
+    /**
+    * Extrait la classe du topiaId
+     * @throws ClassNotFoundException 
+    */
+    public static Class getClassName(String topiaId) throws TopiaNotFoundException {
+        String classname = getClassNameAsString(topiaId);
+        try {
+            Class result = Class.forName(classname);
+            return result;
+        } catch (ClassNotFoundException eee) {
+            throw new TopiaNotFoundException("Can't find class for " + topiaId, eee);
+        }
+    }
+
+    public static String getClassNameAsString(String topiaId){
+        String result = topiaId.substring(0, topiaId.indexOf("#"));
+        return result;
+    }
+
+    /**
+    * Verifie si l'id passé en paramètre est bien un Id topia, c-a-d si la
+    * forme est bien classname#timemillis#random et si le classname est
+    * celui d'une classe valide, c-a-d que le systeme arrive a trouver
+    */
+    public static boolean isValidId(String topiaId){
+        try{
+            if(topiaId.matches(".*?#[0-9]+#[0-9.]+")){
+                getClassName(topiaId);
+                return true;
+            }
+            return false;
+        }catch(Exception eee){
+            Logger.getLogger(TopiaId.class.getName() + ".isValidId").log(Level.WARNING, "Error during verfication of topiaId", eee);
+            return false;
+        }
+    }
+
+} // TopiaId
+