--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/buildframework/helium/sf/java/metadata/src/com/nokia/helium/metadata/fmpp/ORMTemplateModelIterator.java	Fri Aug 13 14:59:05 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.metadata.fmpp;
+
+import java.util.List;
+
+import javax.persistence.EntityManager;
+import javax.persistence.Query;
+
+import freemarker.template.SimpleScalar;
+import freemarker.template.TemplateModel;
+import freemarker.template.TemplateModelIterator;
+
+/**
+ * Internal Iterator class which provides data as collection. 
+ */
+class ORMTemplateModelIterator implements TemplateModelIterator {
+    
+    private static final int PAGE_SIZE = 2000;
+    private String queryString;
+    private Query query;
+    private int index;
+    private String returnType;
+    private boolean nativeQuery;
+    private EntityManager entityManager;
+    private List<Object> data;
+    private int currentPage;
+    private Object next;
+    
+    public ORMTemplateModelIterator(EntityManager entityManager, String queryString, String type, String retType) {
+        this.entityManager = entityManager;
+        this.queryString = queryString;
+        returnType = retType;
+        if (type.startsWith("native")) {
+            nativeQuery = true;
+        }
+        index = 0;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public TemplateModel next() {
+        Object value = next;
+        next = null;
+        if (value != null) {
+            if (nativeQuery && returnType.equals("java.lang.String")) {
+                return new SimpleScalar((String)value);
+            } else {
+                return new ORMObjectModel(value);
+            }
+        }
+        return null;
+    }
+    
+    /**
+     * {@inheritDoc}
+     */
+    @SuppressWarnings("unchecked")
+    public boolean hasNext() {
+        int page = index / PAGE_SIZE;
+        if (query == null || page != currentPage) {
+            if (nativeQuery) {
+                query = entityManager.createNativeQuery(queryString);
+            } else {
+                query = entityManager.createQuery(queryString);
+            }
+            query.setFirstResult(page * PAGE_SIZE);
+            query.setMaxResults(PAGE_SIZE);
+            data = query.getResultList();
+            currentPage = page;
+        }
+        if (next == null && index < data.size()) {
+            next = data.get(index);
+            index++;
+        }
+        return next != null;
+    }
+}