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     2 **

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

     4 ** All rights reserved.

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

     6 **

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

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    14 ** this package.

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    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

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    21 ** ensure the GNU Lesser General Public License version 2.1 requirements

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    38 ** $QT_END_LICENSE$

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    40 ****************************************************************************/

    41 

    42 //

    43 //  W A R N I N G

    44 //  -------------

    45 //

    46 // This file is not part of the Qt API.  It exists purely as an

    47 // implementation detail.  This header file may change from version to

    48 // version without notice, or even be removed.

    49 //

    50 // We mean it.

    51 

    52 #ifndef Patternist_Boolean_H

    53 #define Patternist_Boolean_H

    54 

    55 #include "qitem_p.h"

    56 

    57 QT_BEGIN_HEADER

    58 

    59 QT_BEGIN_NAMESPACE

    60 

    61 namespace QPatternist

    62 {

    63     /**

    64      * @short Implements the value instance of the @c xs:boolean type.

    65      *

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

    67      * @ingroup Patternist_xdm

    68      */

    69     class Q_AUTOTEST_EXPORT Boolean : public AtomicValue

    70     {

    71     public:

    72         typedef AtomicValue::Ptr Ptr;

    73 

    74         /**

    75          * @returns the boolean value this Boolean represents

    76          */

    77         static bool evaluateEBV(const Item::Iterator::Ptr &e,

    78                                 const QExplicitlySharedDataPointer<DynamicContext> &);

    79 

    80         static bool evaluateEBV(const Item &first,

    81                                 const Item::Iterator::Ptr &e,

    82                                 const QExplicitlySharedDataPointer<DynamicContext> &);

    83 

    84         static bool evaluateEBV(const Item &item,

    85                                 const QExplicitlySharedDataPointer<DynamicContext> &context);

    86 

    87         virtual QString stringValue() const;

    88 

    89         /**

    90          * @returns a Boolean object instantiating @p value. Use True() or False()

    91          * if you already know what value you need.

    92          */

    93         static Boolean::Ptr fromValue(const bool value);

    94 

    95         /**

    96          * Creates a boolean value from a lexical representation. "true" and "1"

    97          * becomes @c true, while "false" and "0" becomes @c false.

    98          */

    99         static AtomicValue::Ptr fromLexical(const QString &val);

   100 

   101         /**

   102          * Get the Effective %Boolean Value of this boolean value. For <tt>xs:boolean</tt>, this

   103          * is simply the value.

   104          */

   105         virtual bool evaluateEBV(const QExplicitlySharedDataPointer<DynamicContext> &) const;

   106 

   107         virtual ItemType::Ptr type() const;

   108 

   109         inline bool value() const

   110         {

   111             return m_value;

   112         }

   113 

   114     protected:

   115         friend class CommonValues;

   116         Boolean(const bool value);

   117 

   118     private:

   119         const bool m_value;

   120     };

   121 }

   122 

   123 QT_END_NAMESPACE

   124 QT_END_HEADER

   125 

   126 #endif