qexpressionfactory_p.h

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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_ExpressionFactory_H
#define Patternist_ExpressionFactory_H

#include <QXmlQuery>

#include "qexpression_p.h"
#include "qtokenizer_p.h"

#include <QSharedData>
#include <QUrl>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

class QIODevice;

namespace QPatternist
{
    class Q_AUTOTEST_EXPORT ExpressionFactory : public QSharedData
    {
    public:
        typedef QExplicitlySharedDataPointer<ExpressionFactory> Ptr;

        inline ExpressionFactory()
        {
        }

        virtual ~ExpressionFactory()
        {
        }

        enum CompilationStage
        {
            QueryBodyInitial        = 1,
            QueryBodyTypeCheck      = 1 << 1,
            QueryBodyCompression    = 1 << 2,
            UserFunctionTypeCheck   = 1 << 3,
            UserFunctionCompression = 1 << 4,
            GlobalVariableTypeCheck = 1 << 5
        };

        virtual Expression::Ptr createExpression(const QString &expr,
                                                 const StaticContext::Ptr &context,
                                                 const QXmlQuery::QueryLanguage lang,
                                                 const SequenceType::Ptr &requiredType,
                                                 const QUrl &queryURI,
                                                 const QXmlName &initialTemplateName);

        virtual Expression::Ptr createExpression(QIODevice *const device,
                                                 const StaticContext::Ptr &context,
                                                 const QXmlQuery::QueryLanguage lang,
                                                 const SequenceType::Ptr &requiredType,
                                                 const QUrl &queryURI,
                                                 const QXmlName &initialTemplateName);

        static void registerLastPath(const Expression::Ptr &operand);

    protected:
        enum TemplateCompilationStage
        {
            TemplateInitial         = 1,
            TemplateTypeCheck       = 1 << 1,
            TemplateCompress        = 1 << 2
        };

        virtual void processTreePass(const Expression::Ptr &tree,
                                     const CompilationStage stage);

        virtual void processTemplateRule(const Expression::Ptr &body,
                                         const TemplatePattern::Ptr &pattern,
                                         const QXmlName &mode,
                                         const TemplateCompilationStage stage);

        virtual void processNamedTemplate(const QXmlName &name,
                                          const Expression::Ptr &tree,
                                          const TemplateCompilationStage stage);

        Expression::Ptr createExpression(const Tokenizer::Ptr &tokenizer,
                                         const StaticContext::Ptr &context,
                                         const QXmlQuery::QueryLanguage lang,
                                         const SequenceType::Ptr &requiredType,
                                         const QUrl &queryURI,
                                         const QXmlName &initialTemplateName);
    private:
        Q_DISABLE_COPY(ExpressionFactory)
    };
}

QT_END_NAMESPACE

QT_END_HEADER

#endif