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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 the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
//
// 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_TimezoneFNs_H
#define Patternist_TimezoneFNs_H
#include "qatomiccomparator_p.h"
#include "qfunctioncall_p.h"
/**
* @file
* @short Contains classes implementing the functions found in
* <a href="http://www.w3.org/TR/xpath-functions/#timezone.functions">XQuery 1.0 and
* XPath 2.0 Functions and Operators, 10.7 Timezone Adjustment on Dates and SchemaTime Values</a>.
* @ingroup Patternist_functions
*/
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
namespace QPatternist
{
/**
* @short Base class for classes implementing functions changing the timezone
* on values.
*
* It would be possible to implement this with the Curiously Recurring Template Pattern, in order
* to avoid the virtual call dispatching that is done via createValue(). However, these are not
* very hot code paths and evaluateSingleton() is quite large, which would lead to heavy code
* expansion.
*
* @see <a href="http://en.wikipedia.org/wiki/Curiously_recurring_template_pattern">Curiously
* Recurring Template Pattern, Wikipedia, the free encyclopedia</a>
* @ingroup Patternist_functions
* @author Frans Englich <frans.englich@nokia.com>
*/
class AdjustTimezone : public FunctionCall
{
public:
virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
protected:
virtual Item createValue(const QDateTime &dt) const = 0;
};
/**
* @short Implements the function <tt>fn:adjust-dateTime-to-timezone()</tt>.
*
* @ingroup Patternist_functions
* @author Frans Englich <frans.englich@nokia.com>
*/
class AdjustDateTimeToTimezoneFN : public AdjustTimezone
{
protected:
virtual Item createValue(const QDateTime &dt) const;
};
/**
* @short Implements the function <tt>fn:adjust-dateTime-to-timezone()</tt>.
*
* @ingroup Patternist_functions
* @author Frans Englich <frans.englich@nokia.com>
*/
class AdjustDateToTimezoneFN : public AdjustTimezone
{
protected:
virtual Item createValue(const QDateTime &dt) const;
};
/**
* @short Implements the function <tt>fn:adjust-time-to-timezone()</tt>.
*
* @ingroup Patternist_functions
* @author Frans Englich <frans.englich@nokia.com>
*/
class AdjustTimeToTimezoneFN : public AdjustTimezone
{
protected:
virtual Item createValue(const QDateTime &dt) const;
};
}
QT_END_NAMESPACE
QT_END_HEADER
#endif
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