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diff --git a/src/libs/installer/productkeycheck.h b/src/libs/installer/productkeycheck.h
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+/**************************************************************************
+**
+** Copyright (c) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of Installer Framework
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+**************************************************************************/
+
+#ifndef PRODUCTKEYCHECK_H
+#define PRODUCTKEYCHECK_H
+
+#include "qinstallerglobal.h"
+
+#include <QString>
+#include <QHash>
+
+class ProductKeyCheckPrivate;
+
+class INSTALLER_EXPORT ProductKeyCheck
+{
+public:
+    ~ProductKeyCheck();
+    static ProductKeyCheck *instance();
+
+    // was validLicense
+    bool hasValidKey();
+    QString lastErrorString();
+    QString maintainanceToolDetailErrorNotice();
+
+    //is used in the generic ApplyProductKeyOperation, for example to patch things
+    bool applyKey(const QStringList &arguments);
+
+    // to filter none valid licenses
+    bool isValidLicense(const QString &fileName);
+
+private:
+    ProductKeyCheck();
+    ProductKeyCheckPrivate *const d;
+};
+
+#endif // PRODUCTKEYCHECK_H