source: trunk/src/xmlpatterns/data/qatomiccasters_p.h@ 615

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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_AtomicCasters_H
#define Patternist_AtomicCasters_H

#include "qatomiccaster_p.h"
#include "qdecimal_p.h"
#include "qderivedinteger_p.h"
#include "qderivedstring_p.h"
#include "qinteger_p.h"
#include "qvalidationerror_p.h"

/**
 * @file
 * @short Contains classes sub-classing AtomicCaster and which
 * are responsible of casting an atomic value to another type.
 */

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

namespace QPatternist
{

    /**
     * @short Casts any atomic value to @c xs:string.
     *
     * This class uses Item::stringValue() for retrieving a string
     * representation, and thus supports casting from atomic values
     * of any type.
     *
     * @ingroup Patternist_xdm
     * @author Frans Englich <[email protected]>
     */
    template<TypeOfDerivedString DerivedType>
    class ToStringCaster : public AtomicCaster
    {
    public:
        virtual Item castFrom(const Item &from,
                              const QExplicitlySharedDataPointer<DynamicContext> &context) const
        {
            Q_ASSERT(from);
            return DerivedString<DerivedType>::fromLexical(context->namePool(), from.stringValue());
        }
    };

    /**
     * @short Casts any atomic value to @c xs:untypedAtomic.
     *
     * This class uses Item::stringValue() for retrieving a string
     * representation, and thus supports casting from atomic values
     * of any type. The implementation is similar to ToStringCaster.
     *
     * @ingroup Patternist_xdm
     * @author Frans Englich <[email protected]>
     */
    class ToUntypedAtomicCaster : public AtomicCaster
    {
    public:
        virtual Item castFrom(const Item &from,
                              const QExplicitlySharedDataPointer<DynamicContext> &context) const;
    };

    /**
     * @short Casts a string value to @c xs:anyURI.
     *
     * @ingroup Patternist_xdm
     * @author Frans Englich <[email protected]>
     */
    class ToAnyURICaster : public AtomicCaster
    {
    public:
        virtual Item castFrom(const Item &from,
                              const QExplicitlySharedDataPointer<DynamicContext> &context) const;
    };

    /**
     * @short Casts a @c xs:hexBinary atomic value to @c xs:base64Binary.
     *
     * @ingroup Patternist_xdm
     * @author Frans Englich <[email protected]>
     */
    class HexBinaryToBase64BinaryCaster : public AtomicCaster
    {
    public:
        virtual Item castFrom(const Item &from,
                              const QExplicitlySharedDataPointer<DynamicContext> &context) const;
    };

    /**
     * @short Casts a @c xs:base64Binary atomic value to @c xs:hexBinary.
     *
     * @ingroup Patternist_xdm
     * @author Frans Englich <[email protected]>
     */
    class Base64BinaryToHexBinaryCaster : public AtomicCaster
    {
    public:
        virtual Item castFrom(const Item &from,
                              const QExplicitlySharedDataPointer<DynamicContext> &context) const;
    };

    /**
     * @short Casts a @c xs:string or @c xs:untypedAtomic atomic value to @c xs:base64Binary.
     *
     * @ingroup Patternist_xdm
     * @author Frans Englich <[email protected]>
     */
    class StringToBase64BinaryCaster : public AtomicCaster
    {
    public:
        virtual Item castFrom(const Item &from,
                              const QExplicitlySharedDataPointer<DynamicContext> &context) const;
    };

    /**
     * @short Casts a @c xs:string or @c xs:untypedAtomic atomic value to @c xs:hexBinary.
     *
     * @ingroup Patternist_xdm