/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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
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** 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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** 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.
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** $QT_END_LICENSE$
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****************************************************************************/

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.

#ifndef Patternist_SystemPropertyFN_H
#define Patternist_SystemPropertyFN_H

#include <private/qstaticnamespacescontainer_p.h>

QT_BEGIN_NAMESPACE

namespace QPatternist
{
    /**
     * @short Implements XSL-T 2.0's XPath function <tt>fn:system-property()</tt>.
     *
     * @see <a href="http://www.w3.org/TR/xslt20/#system-property">XSL Transformations
     * (XSLT) Version 2.0, 16.6.5 system-property</a>
     * @author Frans Englich <frans.englich@nokia.com>
     * @ingroup Patternist_functions
     */
    class SystemPropertyFN : public StaticNamespacesContainer
    {
    public:
        virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;

    private:
        /**
         * Returns a string representation for @p property as defined
         * for the system properties in "XSL Transformations (XSLT)
         * Version 2.0, 16.6.5 system-property". Hence, this function
         * handles only the properties specified in the XSL namespace, and returns
         * an empty string if an unrecognized property is asked for.
         */
        static QString retrieveProperty(const QXmlName name);
    };
}

QT_END_NAMESPACE

#endif
