diff -r 556534771396 -r d4d56f5e7c55 harvester/contentinfodb/inc/contentinfodb.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/harvester/contentinfodb/inc/contentinfodb.h	Tue Oct 05 13:15:12 2010 +0530
@@ -0,0 +1,146 @@
+/*
+ * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+ * All rights reserved.
+ * This component and the accompanying materials are made available
+ * under the terms of "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:  contentinfodb .
+ *
+ */
+#ifndef CONTENTINFODB_H
+#define CONTENTINFODB_H
+#include <qobject.h>
+#include <QSqlDatabase>
+#include <qmutex.h>
+#include "contentinfodbcommon.h"
+CONTENTINFODB_CLASS(ContentinfodbTest)
+
+class ContentInfoDb : public QObject
+    {
+Q_OBJECT
+public:
+    /**
+     * Singleton construtor
+     * @since S60 ?S60_version.
+     */
+    static ContentInfoDb* instance()
+        {
+        static QMutex mutex;
+        if (!m_instance)
+            {
+            mutex.lock();
+            m_instanceCounter++;
+            if (!m_instance)
+                {
+                m_instance = new ContentInfoDb;
+                }
+            mutex.unlock();
+            }
+
+        return m_instance;
+        }
+
+    /**
+     * Singleton destructor
+     * @since S60 ?S60_version.
+     */
+    static void deleteinstance()
+        {
+        m_instanceCounter--;
+        if ((m_instanceCounter <= 0) && (m_instance))
+            {
+            delete m_instance;
+            m_instance = 0;
+            }
+        }
+private:
+    /**
+     * Constructor.
+     * @since S60 ?S60_version.
+     */
+    ContentInfoDb();
+
+    /**
+     * Destructor.
+     * @since S60 ?S60_version.
+     */
+    ~ContentInfoDb();
+public:
+
+    /**
+     * returns success/failure status.
+     * @since S60 ?S60_version.
+     * @param query
+     */
+    bool writeData(QString query);
+
+    /**
+     * returns success/failure status.
+     * @since S60 ?S60_version.
+     * @param query input
+     */
+    QStringList readData(QString query);
+
+    /**
+     * returns value at mentioned position
+     * @param query input     
+     */
+    QString readStringData(QString query);
+
+    /**
+     * creates the table with the mentioned tablename.
+     * @param tablename 
+     * @param sql query
+     */
+    void createTable(QString tablename, QString query);
+
+    /**
+     * returns success/failure status.
+     * @since S60 ?S60_version.
+     */
+    bool Open();
+
+    /**     
+     * close the database connection
+     * @since S60 ?S60_version.     
+     */
+    void Close();
+
+signals:
+
+    /**     
+     * signal to notify when updation happens in the contentinfodb
+     */
+    void dbUpdated();
+
+private:
+
+    /**
+     * static instance to make single instance
+     * Own.
+     */
+    static ContentInfoDb *m_instance;
+
+    /**
+     * counter for number for instance
+     * Own.
+     */
+    static int m_instanceCounter;
+
+    /**
+     * database handle
+     * Own.
+     */
+    QSqlDatabase m_db;
+
+private:
+    CONTENTINFODB_FRIEND_CLASS(ContentinfodbTest)
+    };
+#endif //CONTENTINFODB_H