--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/buildframework/helium/sf/java/jpa/src/com/nokia/helium/jpa/ORMUtil.java	Tue Apr 27 08:33:08 2010 +0300
@@ -0,0 +1,93 @@
+
+/*
+ * Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiary(-ies).
+ * All rights reserved.
+ * This component and the accompanying materials are made available
+ * under the terms of the License "Eclipse Public License v1.0"
+ * which accompanies this distribution, and is available
+ * at the URL "http://www.eclipse.org/legal/epl-v10.html".
+ *
+ * Initial Contributors:
+ * Nokia Corporation - initial contribution.
+ *
+ * Contributors:
+ *
+ * Description:  
+ *
+ */
+
+package com.nokia.helium.jpa;
+
+import org.apache.log4j.Logger;
+import java.util.HashMap;
+import org.apache.tools.ant.BuildException;
+import java.io.IOException;
+
+/**
+ * Utility class to communicate to the database using JPA entity
+ * manager.
+ */
+public final class ORMUtil {
+
+    private static Logger log = Logger.getLogger(ORMUtil.class);
+    
+    private static final int PERSISTANCE_COUNT_LIMIT = 1000;
+
+    private static final int READ_CACHE_LIMIT = 30000;
+
+    private static HashMap<String, ORMEntityManager> emMap = 
+        new HashMap<String, ORMEntityManager>();
+
+    private ORMUtil() {
+    }
+    
+    /**
+     * Initializes the entity manager and begins the transcations.
+     * @param urlPath - database path to be connected to.
+     */
+    public static synchronized void initializeORM(String urlPath) {
+        ORMEntityManager manager = emMap.get(urlPath);
+        log.debug("initializeORM: urlpath: " + urlPath);
+        if (manager == null) {
+            try {
+                manager = new ORMEntityManager(urlPath);
+                emMap.put(urlPath, manager);
+                log.debug("initializeORM: manager: " + manager);
+                log.debug("initializeORM: manager: " + manager.getEntityManager());
+            } catch ( IOException ex ) {
+                throw new BuildException("Entity Manager creation failure");
+            }
+        }
+    }
+
+    /**
+     * Helper Function to return the entity manager.
+     * @return entity manager created during initialization.
+     */
+    public static ORMEntityManager getEntityManager(String urlPath) {
+        log.debug("getEntityManager: urlpath: " + urlPath);
+        ORMEntityManager manager = emMap.get(urlPath);
+        if (manager != null) {
+            log.debug("getEntityManager: manager: " + manager);
+            log.debug("getEntityManager: manager.entityManager: " + manager.getEntityManager());
+            return manager;
+        } else {
+            log.debug("getEntityManager: manager: is null");
+            throw new BuildException("ORM entity manager is null");
+        }
+    }
+    
+    /**
+     * Finalize the entity manager and release all the objects.
+     */
+    public static void finalizeORM(String urlPath) {
+        ORMEntityManager manager = emMap.get(urlPath);
+        log.debug("finalizeORM: urlpath: " + urlPath);
+        if (manager != null) {
+            manager.finalizeEntityManager();
+            manager = null;
+            log.debug("finalizeORM: manager" + manager);
+            emMap.remove(urlPath);
+        }
+    }
+}
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