--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gnv/src/main/java/de/intevation/gnv/action/sessionmodel/SessionModelFactory.java	Mon Sep 14 13:56:03 2009 +0000
@@ -0,0 +1,68 @@
+/**
+ *
+ */
+package de.intevation.gnv.action.sessionmodel;
+
+import javax.servlet.http.HttpServletRequest;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.gnv.artifactdatabase.client.DefaultArtifactDatabaseClient;
+
+/**
+ * @author Tim Englich <tim.englich@intevation.de>
+ *
+ */
+public class SessionModelFactory {
+    
+    public final static String SESSION_MODEL_ID = "de.intevation.gnv.action.sessionmodel.SessionModel.ID";
+    /**
+     * the logger, used to log exceptions and additonaly information
+     */
+    private static Logger log = Logger.getLogger(SessionModelFactory.class);
+
+    
+    /**
+     * The singleton Instance of this Factory.
+     */
+    private static SessionModelFactory instance = null;
+
+    /**
+     * Constructor
+     */
+    private SessionModelFactory() {
+        super();
+    }
+
+    /**
+     * This Method provides an singleton Instance of this Class.
+     * @return an singleton Instance of this Class
+     */
+    public static SessionModelFactory getInstance(){
+        if (instance == null){
+            instance = new SessionModelFactory();
+        }
+        return instance;
+    }
+    
+    
+    /**
+     * Getting the ArtifactDatabaseClient
+     * @return the ArtifactDatabaseClient
+     */
+    public SessionModel getSessionModel(HttpServletRequest request){
+       synchronized (this.getClass()) {
+            SessionModel sm = null;
+            if (request.getSession().getAttribute(SESSION_MODEL_ID)!= null){
+                sm = (SessionModel)request.getSession().getAttribute(SESSION_MODEL_ID);
+                ;
+            }else{
+                sm = new DefaultSessionModel();
+                request.getSession().setAttribute(SESSION_MODEL_ID, sm);
+            }
+            
+            return sm;
+       }
+    }
+
+}