/****************************************************************************

**

** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the QtXmlPatterns module of the Qt Toolkit.

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** 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

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**

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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_CommonValues_H

#define Patternist_CommonValues_H

#include "qdaytimeduration_p.h"

#include "qyearmonthduration_p.h"

#include "qemptyiterator_p.h"

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

namespace QPatternist

{

    /**

     * @short A collection of common values.

     *

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

     * @ingroup Patternist_xdm

     * @todo Documentation is missing/incomplete

     */

    class CommonValues

    {

    public:

        /**

         * An empty, zero-length string.

         *

         * @note It is not @c null, but empty.

         */

        static const AtomicValue::Ptr EmptyString;

        /**

         * The string "true", the lexical representation of

         * @c xs:boolean's value @c true.

         */

        static const AtomicValue::Ptr TrueString;

        /**

         * The string "false", the lexical representation of

         * @c xs:boolean's value @c false.

         */

        static const AtomicValue::Ptr UntypedAtomicFalse;

        /**

         * The string "true", the lexical representation of

         * @c xs:boolean's value @c true.

         */

        static const AtomicValue::Ptr UntypedAtomicTrue;

        /**

         * The string "false", the lexical representation of

         * @c xs:boolean's value @c false.

         */

        static const AtomicValue::Ptr FalseString;

        /**

         * @returns a Boolean instance carrying the boolean value @c true.

         * Use this value instead of Boolean::fromValue() if you

         * know what boolean value you need.

         */

        static const AtomicValue::Ptr BooleanTrue;

        /**

         * @returns a Boolean instance carrying the boolean value @c true.

         * Use this value instead of Boolean::fromValue() if you

         * know what boolean value you need.

         */

        static const AtomicValue::Ptr BooleanFalse;

        /**

         * Not-a-Numeric typed as @c xs:double.

         */

        static const AtomicValue::Ptr DoubleNaN;

        /**

         * Not-a-Number typed as @c xs:float, <tt>xs:float("NaN")</tt>.

         */

        static const AtomicValue::Ptr FloatNaN;

        /**

         * Zero(0) typed as @c xs:integer, <tt>xs:integer("0")</tt>.

         */

        static const Item IntegerZero;

        /**

         * An empty, "", @c xs:anyURI.

         */

        static const AtomicValue::Ptr EmptyAnyURI;

        /**

         * The empty sequence.

         */

        static const EmptyIterator<Item>::Ptr emptyIterator;

        /**

         * <tt>xs:float("-INF")</tt>

         */

        static const AtomicValue::Ptr NegativeInfFloat;

        /**

         * <tt>xs:float("INF")</tt>

         */

        static const AtomicValue::Ptr InfFloat;

        /**

         * <tt>xs:double("-INF")</tt>

         */

        static const AtomicValue::Ptr NegativeInfDouble;

        /**

         * <tt>xs:double("INF")</tt>

         */

        static const AtomicValue::Ptr InfDouble;

        /**

         * <tt>xs:float("1")</tt>

         */

        static const AtomicValue::Ptr FloatOne;

        /**

         * <tt>xs:double("1")</tt>

         */

        static const AtomicValue::Ptr DoubleOne;

        /**

         * <tt>xs:decimal("1")</tt>

         */

        static const AtomicValue::Ptr DecimalOne;

        /**

         * <tt>xs:integer("1")</tt>

         */

        static const Item IntegerOne;

        /**

         * <tt>xs:integer("-1")</tt>

         */

        static const Item IntegerOneNegative;

        /**

         * <tt>xs:double("0")</tt>

         */

        static const AtomicValue::Ptr DoubleZero;

        /**

         * <tt>xs:float("0")</tt>

         */

        static const AtomicValue::Ptr FloatZero;

        /**

         * <tt>xs:integer("0")</tt>

         */

        static const AtomicValue::Ptr DecimalZero;

        /**

         * The @c xs:dayTimeDuration value PT0S

         */

        static const DayTimeDuration::Ptr DayTimeDurationZero;

        /**

         * The @c xs:yearMonthDuration value P0M

         */

        static const DayTimeDuration::Ptr YearMonthDurationZero;

    private:

        /**

         * The constructor is private because this class is not meant to be instantiated,

         * but should only be used via its static const members.

         */

        inline CommonValues();

        Q_DISABLE_COPY(CommonValues)

    };

}

QT_END_NAMESPACE

QT_END_HEADER

#endif