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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_AbstractDuration_H

#define Patternist_AbstractDuration_H

#include <QRegExp>

#include "qitem_p.h"

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

namespace QPatternist

{

    /**

     * @short Base class for classes implementing durations.

     *

     * @see <a href="http://www.w3.org/TR/xmlschema-2/#duration">XML Schema Part

     * 2: Datatypes Second Edition, 3.2.6 duration</a>

     * @see <a href="http://www.w3.org/TR/xpath-datamodel/#dates-and-times">XQuery

     * 1.0 and XPath 2.0 Data Model (XDM), 3.3.2 Dates and Times</a>

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

     * @ingroup Patternist_xdm

     * @todo Documentation is missing/incomplete

     */

    class AbstractDuration : public AtomicValue

    {

    public:

        typedef QExplicitlySharedDataPointer<AbstractDuration> Ptr;

        /**

         * @short The amount in milli seconds.

         */

        typedef qint64 Value;

        /**

         * @short Acts as a mapping table for AbstractDuration::create()

         * and describes where certain fields in a QRegExp pattern can be found

         * for a particular W3C XML Schema duration type.

         *

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

         * @ingroup Patternist_xdm

         */

        class CaptureTable

        {

        public:

            CaptureTable(const QRegExp &exp,

                         const qint8 yearP,

                         const qint8 monthP,

                         const qint8 dayP = -1,

                         const qint8 tDelimiterP = -1,

                         const qint8 hourP = -1,

                         const qint8 minutesP = -1,

                         const qint8 secondsP = -1,

                         const qint8 msecondsP = -1) : regExp(exp),

                                                       year(yearP),

                                                       month(monthP),

                                                       day(dayP),

                                                       tDelimiter(tDelimiterP),

                                                       hour(hourP),

                                                       minutes(minutesP),

                                                       seconds(secondsP),

                                                       mseconds(msecondsP)

            {

                Q_ASSERT(exp.isValid());

                Q_ASSERT(yearP == -1 || yearP == 2);

            }

            const QRegExp regExp;

            const qint8 year;

            const qint8 month;

            const qint8 day;

            const qint8 tDelimiter;

            const qint8 hour;

            const qint8 minutes;

            const qint8 seconds;

            const qint8 mseconds;

        };

        /**

         * Determines whether this Duration is equal to @p other.

         *

         * @note Do not re-implement this function. It uses getters such as years() and

         * mseconds() for determining its truth value.

         */

        bool operator==(const AbstractDuration &other) const;

        virtual YearProperty years() const = 0;

        virtual MonthProperty months() const = 0;

        virtual DayCountProperty days() const = 0;

        virtual HourProperty hours() const = 0;

        virtual MinuteProperty minutes() const = 0;

        virtual SecondProperty seconds() const = 0;

        virtual MSecondProperty mseconds() const = 0;

        /**

         * @returns the value of this AbstractDuration. For example,

         * in the case of xs:yearMonthDuration, that is YearMonthDuration,

         * years times twelve plus the months is returned.

         */

        virtual Value value() const = 0;

        /**

         * A polymorphic factory function that returns instances of the

         * sub-class with the value @p val.

         */

        virtual Item fromValue(const Value val) const = 0;

        /**

         * Determines whether this AbstractDuration is positive. For example,

         * "P10H" is positive, while "-P10H" is not.

         *

         * @note Do not re-implement this function. Use the constructor, AbstractDuration(),

         * for changing the value.

         * @returns @c true if this AbstractDuration is positive, otherwise @c false.

         */

        bool isPositive() const;

    protected:

        AbstractDuration(const bool isPos);

        static QString serializeMSeconds(const MSecondProperty mseconds);

        static AtomicValue::Ptr create(const CaptureTable &captTable,

                                       const QString &lexical,

                                       bool *isPositive,

                                       YearProperty *years,

                                       MonthProperty *months,

                                       DayCountProperty *days,

                                       HourProperty *hours,

                                       MinuteProperty *minutes,

                                       SecondProperty *seconds,

                                       MSecondProperty *mseconds);

        const bool m_isPositive;

    };

}

QT_END_NAMESPACE

QT_END_HEADER

#endif