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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_DateTimeFNs_H

#define Patternist_DateTimeFNs_H

#include "qatomiccomparator_p.h"

#include "qcommonvalues_p.h"

#include "qschemadatetime_p.h"

#include "qdaytimeduration_p.h"

#include "qdecimal_p.h"

#include "qinteger_p.h"

#include "qfunctioncall_p.h"

/**

 * @file

 * @short Contains classes implementing the functions found in

 * <a href="http://www.w3.org/TR/xpath-functions/#component-exraction-functions">XQuery 1.0 and

 * XPath 2.0 Functions and Operators, 10.5 Component Extraction Functions on Durations, Dates and Times</a>.

 *

 * @ingroup Patternist_functions

 */

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

namespace QPatternist

{

    /**

     * @short Helper class for implementing functions extracting components from durations.

     *

     * Each sub-class must implement this function:

     *

     * @code

     * Item extract(const AbstractDuration *const duration) const;

     * @endcode

     *

     * This function performs the actual component extraction from the argument, that

     * is guaranteed to never be @c null.

     *

     * @ingroup Patternist_functions

     * @author Frans Englich <frans.englich@nokia.com>

     */

    template<typename TSubClass>

    class ExtractFromDurationFN : public FunctionCall

    {

    public:

        /**

         * Takes care of the argument handling, and, if applicable,

         * calls extract() with the value of the operand.

         */

        virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;

    };

    /**

     * @short Implements the function <tt>fn:years-from-duration()</tt>.

     *

     * @ingroup Patternist_functions

     * @author Frans Englich <frans.englich@nokia.com>

     */

    class YearsFromDurationFN : public ExtractFromDurationFN<YearsFromDurationFN>

    {

    public:

        inline Item extract(const AbstractDuration *const duration) const;

    };

    /**

     * @short Implements the function <tt>fn:months-from-duration()</tt>.

     *

     * @ingroup Patternist_functions

     * @author Frans Englich <frans.englich@nokia.com>

     */

    class MonthsFromDurationFN : public ExtractFromDurationFN<MonthsFromDurationFN>

    {

    public:

        inline Item extract(const AbstractDuration *const duration) const;

    };

    /**

     * @short Implements the function <tt>fn:days-from-duration()</tt>.

     *

     * @ingroup Patternist_functions

     * @author Frans Englich <frans.englich@nokia.com>

     */

    class DaysFromDurationFN : public ExtractFromDurationFN<DaysFromDurationFN>

    {

    public:

        inline Item extract(const AbstractDuration *const duration) const;

    };

    /**

     * @short Implements the function <tt>fn:hours-from-duration()</tt>.

     *

     * @ingroup Patternist_functions

     * @author Frans Englich <frans.englich@nokia.com>

     */

    class HoursFromDurationFN : public ExtractFromDurationFN<HoursFromDurationFN>

    {

    public:

        inline Item extract(const AbstractDuration *const duration) const;

    };

    /**

     * @short Implements the function <tt>fn:minutes-from-duration()</tt>.

     *

     * @ingroup Patternist_functions

     * @author Frans Englich <frans.englich@nokia.com>

     */

    class MinutesFromDurationFN : public ExtractFromDurationFN<MinutesFromDurationFN>

    {

    public:

        inline Item extract(const AbstractDuration *const duration) const;

    };

    /**

     * @short Implements the function <tt>fn:seconds-from-duration()</tt>.

     *

     * @ingroup Patternist_functions

     * @author Frans Englich <frans.englich@nokia.com>

     */

    class SecondsFromDurationFN : public ExtractFromDurationFN<SecondsFromDurationFN>

    {

    public:

        inline Item extract(const AbstractDuration *const duration) const;

    };

    /**

     * @short Helper class for implementing functions extracting components

     * from date/time values.

     *

     * Each sub-class must implement this function:

     *

     * @code

     * Item extract(const AbstractDuration *const duration) const;

     * @endcode

     *

     * This function performs the actual component extraction from the argument, that

     * is guaranteed to never be @c null.

     *

     * @ingroup Patternist_functions

     * @author Frans Englich <frans.englich@nokia.com>

     */

    template<typename TSubClass>

    class ExtractFromDateTimeFN : public FunctionCall

    {

    public:

        /**

         * Takes care of the argument handling, and, if applicable,

         * calls extract() with the value of the operand.

         */

        virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;

    };

    /**

     * @short Extracts the year property from a sub-class of AbstractDateTime such as DateTime or Date.

     * This function implements <tt>fn:year-from-dateTime()</tt> and <tt>fn:year-from-date()</tt>.

     *

     * @ingroup Patternist_functions

     * @author Frans Englich <frans.englich@nokia.com>

     */

    class YearFromAbstractDateTimeFN : public ExtractFromDateTimeFN<YearFromAbstractDateTimeFN>

    {

    public:

        inline Item extract(const QDateTime &dt) const;

    };

    /**

     * @short Extracts the day property from a sub-class of AbstractDateTime such as DateTime or Date.

     * This function implements <tt>fn:day-from-dateTime()</tt> and <tt>fn:day-from-date()</tt>.

     *

     * @ingroup Patternist_functions

     * @author Frans Englich <frans.englich@nokia.com>

     */

    class DayFromAbstractDateTimeFN : public ExtractFromDateTimeFN<DayFromAbstractDateTimeFN>

    {

    public:

        inline Item extract(const QDateTime &dt) const;

    };

    /**

     * @short Extracts the minute property from a sub-class of AbstractDateTime such as DateTime or SchemaTime.

     * Implements the functions <tt>fn:hours-from-dateTime()</tt> and

     * <tt>fn:hours-from-time()</tt>.

     *

     * @ingroup Patternist_functions

     * @author Frans Englich <frans.englich@nokia.com>

     */

    class HoursFromAbstractDateTimeFN : public ExtractFromDateTimeFN<HoursFromAbstractDateTimeFN>

    {

    public:

        inline Item extract(const QDateTime &dt) const;

    };

    /**

     * @short Extracts the minutes property from a sub-class of AbstractDateTime such as DateTime or Date.

     * Implements the functions <tt>fn:minutes-from-dateTime()</tt> and

     * <tt>fn:minutes-from-time()</tt>.

     *

     * @ingroup Patternist_functions

     * @author Frans Englich <frans.englich@nokia.com>

     */

    class MinutesFromAbstractDateTimeFN : public ExtractFromDateTimeFN<MinutesFromAbstractDateTimeFN>

    {

    public:

        inline Item extract(const QDateTime &dt) const;

    };

    /**

     * @short Extracts the seconds property from a sub-class of AbstractDateTime such as DateTime or Date.

     * Implements the functions <tt>fn:seconds-from-dateTime()</tt> and

     * <tt>fn:seconds-from-time()</tt>.

     *

     * @ingroup Patternist_functions

     * @author Frans Englich <frans.englich@nokia.com>

     */

    class SecondsFromAbstractDateTimeFN : public ExtractFromDateTimeFN<SecondsFromAbstractDateTimeFN>

    {

    public:

        inline Item extract(const QDateTime &dt) const;

    };

    /**

     * @short Extracts the timezone property from a sub-class of AbstractDateTime such as DateTime or Date.

     * Implements the functions <tt>fn:timezone-from-dateTime()</tt>,

     * <tt>fn:timezone-from-time()</tt> and <tt>fn:timezone-from-date()</tt>.

     *

     * @ingroup Patternist_functions

     * @author Frans Englich <frans.englich@nokia.com>

     */

    class TimezoneFromAbstractDateTimeFN : public ExtractFromDateTimeFN<TimezoneFromAbstractDateTimeFN>

    {

    public:

        inline Item extract(const QDateTime &dt) const;

    };

    /**

     * @short implements the functions <tt>fn:month-from-dateTime()</tt> and <tt>fn:month-from-date()</tt>.

     *

     * @ingroup Patternist_functions

     * @author Frans Englich <frans.englich@nokia.com>

     */

    class MonthFromAbstractDateTimeFN : public ExtractFromDateTimeFN<MonthFromAbstractDateTimeFN>

    {

    public:

        inline Item extract(const QDateTime &dt) const;

    };

#include "qdatetimefns.cpp"

}

QT_END_NAMESPACE

QT_END_HEADER

#endif