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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_Integer_H
#define Patternist_Integer_H

#include "qschemanumeric_p.h"

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

namespace QPatternist
{
    /**
     * @short Implements the value instance of the @c xs:integer type.
     *
     * @author Frans Englich <frans.englich@nokia.com>
     * @ingroup Patternist_xdm
     * @todo Documentation is missing
     */
    class Integer : public Numeric
    {
    public:

        typedef Numeric::Ptr Ptr;

        /**
         * Constructs an instance from the lexical
         * representation @p strNumeric.
         *
         * @todo Type error handling.
         */
        static AtomicValue::Ptr fromLexical(const QString &strNumeric);

        static Item fromValue(const xsInteger num);

        /**
         * Determines the Effective %Boolean Value of this number.
         *
         * @returns @c false if the number is 0, otherwise @c true.
         */
        bool evaluateEBV(const QExplicitlySharedDataPointer<DynamicContext> &) const;

        virtual QString stringValue() const;

        /**
         * @returns always BuiltinTypes::xsInteger
         */
        virtual ItemType::Ptr type() const;

        virtual xsDouble toDouble() const;
        virtual xsInteger toInteger() const;
        virtual xsFloat toFloat() const;
        virtual xsDecimal toDecimal() const;

        virtual Numeric::Ptr round() const;
        virtual Numeric::Ptr roundHalfToEven(const xsInteger scale) const;
        virtual Numeric::Ptr floor() const;
        virtual Numeric::Ptr ceiling() const;
        virtual Numeric::Ptr abs() const;
        virtual qulonglong toUnsignedInteger() const;

        /**
         * @returns always @c false, @c xs:integer doesn't have
         * not-a-number in its value space.
         */
        virtual bool isNaN() const;

        /**
         * @returns always @c false, @c xs:integer doesn't have
         * infinity in its value space.
         */
        virtual bool isInf() const;
        virtual Item toNegated() const;

        /**
         * @short Returns always @c true.
         */
        virtual bool isSigned() const;
    protected:
        Integer(const xsInteger num);

    private:
        const xsInteger m_value;
    };
}

QT_END_NAMESPACE

QT_END_HEADER

#endif
