/****************************************************************************

**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

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

**

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

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

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

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

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

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

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**

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** rights.  These rights are described in the Nokia Qt LGPL Exception

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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_GenericDynamicContext_H

#define Patternist_GenericDynamicContext_H

#include <QDateTime>

#include <QVector>

#include "qdaytimeduration_p.h"

#include "qstackcontextbase_p.h"

#include "qexpression_p.h"

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

namespace QPatternist

{

    /**

     * @short A DynamicContext supplying basic information that always is used.

     *

     * This DynamicContext is the first DynamicContext used during

     * a run and is always used. In addition, more contexts, such as

     * a Focus can be created.

     *

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

     */

    class GenericDynamicContext : public StackContextBase<DynamicContext>

    {

    public:

        typedef QExplicitlySharedDataPointer<GenericDynamicContext> Ptr;

        GenericDynamicContext(const NamePool::Ptr &np,

                              QAbstractMessageHandler *const messageHandler,

                              const LocationHash &locations);

        virtual xsInteger contextPosition() const;

        /**

         * @returns always @c null, the focus is always undefined when an GenericDynamicContext

         * is used.

         */

        virtual Item contextItem() const;

        virtual xsInteger contextSize();

        virtual void setFocusIterator(const Item::Iterator::Ptr &it);

        virtual Item::Iterator::Ptr focusIterator() const;

        virtual QAbstractMessageHandler * messageHandler() const;

        virtual QExplicitlySharedDataPointer<DayTimeDuration> implicitTimezone() const;

        virtual QDateTime currentDateTime() const;

        virtual QAbstractXmlReceiver *outputReceiver() const;

        void setOutputReceiver(QAbstractXmlReceiver *const receiver);

        virtual NodeBuilder::Ptr nodeBuilder(const QUrl &baseURI) const;

        void setNodeBuilder(NodeBuilder::Ptr &builder);

        virtual ResourceLoader::Ptr resourceLoader() const;

        void setResourceLoader(const ResourceLoader::Ptr &loader);

        virtual ExternalVariableLoader::Ptr externalVariableLoader() const;

        void setExternalVariableLoader(const ExternalVariableLoader::Ptr &loader);

        virtual NamePool::Ptr namePool() const;

        virtual QSourceLocation locationFor(const SourceLocationReflection *const reflection) const;

        virtual void addNodeModel(const QAbstractXmlNodeModel::Ptr &nm);

        virtual const QAbstractUriResolver *uriResolver() const;

        virtual ItemCacheCell &globalItemCacheCell(const VariableSlotID slot);

        virtual ItemSequenceCacheCell::Vector &globalItemSequenceCacheCells(const VariableSlotID slot);

        void setUriResolver(const QAbstractUriResolver *const resolver);

        /**

         * We return a null item, we have no focus.

         */

        virtual Item currentItem() const;

        /**

         * @short Returns always @c null, since we're always

         * a top-level context.

         */

        virtual DynamicContext::Ptr previousContext() const;

        virtual QExplicitlySharedDataPointer<TemplateMode> currentTemplateMode() const;

    private:

        QAbstractMessageHandler *       m_messageHandler;

        const QDateTime                 m_currentDateTime;

        const DayTimeDuration::Ptr      m_zoneOffset;

        QAbstractXmlReceiver *          m_outputReceiver;

        mutable NodeBuilder::Ptr        m_nodeBuilder;

        ExternalVariableLoader::Ptr     m_externalVariableLoader;

        ResourceLoader::Ptr             m_resourceLoader;

        NamePool::Ptr                   m_namePool;

        const LocationHash              m_locations;

        QAbstractXmlNodeModel::List     m_nodeModels;

        const QAbstractUriResolver *    m_uriResolver;

        ItemCacheCell::Vector           m_globalItemCacheCells;

        ItemSequenceCacheCell::Vector   m_globalItemSequenceCacheCells;

    };

}

QT_END_NAMESPACE

QT_END_HEADER

#endif