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

**

** Copyright (C) 2008 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

** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

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

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**

** If you have questions regarding the use of this file, please contact

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** $QT_END_LICENSE$

**

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

//

//  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_XsdAttributeReference_H

#define Patternist_XsdAttributeReference_H

#include "qxsdattributeuse_p.h"

#include <QtXmlPatterns/QSourceLocation>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

namespace QPatternist

{

    /**

     * @short A helper class for attribute reference resolving.

     *

     * For easy resolving of attribute references, we have this class

     * that can be used as a place holder for the real attribute use

     * object it is referring to.

     * So whenever the parser detects an attribute reference, it creates

     * a XsdAttributeReference and returns it instead of the XsdAttributeUse.

     * During a later phase, the resolver will look for all XsdAttributeReferences

     * in the schema and will replace them with their referring XsdAttributeUse

     * objects.

     *

     * @ingroup Patternist_schema

     * @author Tobias Koenig <tobias.koenig@nokia.com>

     */

    class XsdAttributeReference : public XsdAttributeUse

    {

        public:

            typedef QExplicitlySharedDataPointer<XsdAttributeReference> Ptr;

            /**

             * Describes the type of the attribute reference.

             */

            enum Type

            {

                AttributeUse,   ///< The reference points to an attribute use.

                AttributeGroup  ///< The reference points to an attribute group.

            };

            /**

             * Always returns false, used to avoid dynamic casts.

             */

            virtual bool isAttributeUse() const;

            /**

             * Always returns true, used to avoid dynamic casts.

             */

            virtual bool isReference() const;

            /**

             * Sets the @p type of the attribute reference.

             */

            void setType(Type type);

            /**

             * Returns the type of the attribute reference.

             */

            Type type() const;

            /**

             * Sets the @p name of the attribute or attribute group the

             * attribute reference refers to.

             */

            void setReferenceName(const QXmlName &name);

            /**

             * Returns the name of the attribute or attribute group the

             * attribute reference refers to.

             */

            QXmlName referenceName() const;

            /**

             * Sets the source @p location where the reference is located.

             */

            void setSourceLocation(const QSourceLocation &location);

            /**

             * Returns the source location where the reference is located.

             */

            QSourceLocation sourceLocation() const;

        private:

            Type            m_type;

            QXmlName        m_referenceName;

            QSourceLocation m_sourceLocation;

    };

}

QT_END_NAMESPACE

QT_END_HEADER

#endif