source: trunk/src/xmlpatterns/expr/qqnameconstructor_p.h@ 243

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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_QNameConstructor_H
#define Patternist_QNameConstructor_H

#include "qsinglecontainer_p.h"
#include "qbuiltintypes_p.h"
#include "qpatternistlocale_p.h"
#include "qxpathhelper_p.h"

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

namespace QPatternist
{
    /**
     * @short Creates an @c xs:QName value from a lexical QName using
     * statically known namespace bindings.
     *
     * @see QQNameValue
     * @see QXmlUtils
     * @author Frans Englich <[email protected]>
     * @ingroup Patternist_expressions
     */
    class QNameConstructor : public SingleContainer
    {
    public:

        QNameConstructor(const Expression::Ptr &source,
                         const NamespaceResolver::Ptr &nsResolver);

        virtual Item evaluateSingleton(const DynamicContext::Ptr &) const;

        virtual SequenceType::List expectedOperandTypes() const;

        virtual SequenceType::Ptr staticType() const;

        virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const;

        /**
         * Expands @p lexicalQName, which is a lexical representation of a QName such as "x:body", into
         * a QName using @p nsResolver to supply the namespace bindings.
         *
         * If @p lexicalQName is lexically invalid @p InvalidQName is raised via @p context, or if
         * no namespace binding does not exists for a prefix(if any) in @p lexicalQName, @p NoBinding
         * is raised via @p context.
         *
         * If @p asForAttribute is @c true, the name is considered to be for an
         * attribute in some way, and @p lexicalQName will not pick up the
         * default namespace if it doesn't have a prefix.
         *
         * @p nsResolver is parameterized meaning the function can be instantiated with either
         * DynamicContext or StaticContext.
         *
         * @see QQNameValue
         * @see QXmlUtils
         */
        template<typename TReportContext,
                 const ReportContext::ErrorCode InvalidQName,
                 const ReportContext::ErrorCode NoBinding>
        static
        QXmlName expandQName(const QString &lexicalQName,
                             const TReportContext &context,
                             const NamespaceResolver::Ptr &nsResolver,
                             const SourceLocationReflection *const r,
                             const bool asForAttribute = false);

        /**
         * Resolves the namespace prefix @p prefix to its namespace if it exists, or
         * raised ReportContext::XPST0081 otherwise.
         *
         * @returns the namespace URI corresponding to @p prefix
         */
        static QXmlName::NamespaceCode namespaceForPrefix(const QXmlName::PrefixCode prefix,
                                                          const StaticContext::Ptr &context,
                                                          const SourceLocationReflection *const r);

        virtual const SourceLocationReflection *actualReflection() const;

    private: