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     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

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

     6 **

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

     8 **

     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

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    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

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

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

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

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

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

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    23 **

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

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    38 ** $QT_END_LICENSE$

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    40 ****************************************************************************/

    41 

    42 //

    43 //  W A R N I N G

    44 //  -------------

    45 //

    46 // This file is not part of the Qt API.  It exists purely as an

    47 // implementation detail.  This header file may change from version to

    48 // version without notice, or even be removed.

    49 //

    50 // We mean it.

    51 

    52 #ifndef QPatternist_ResourceDelegator_p_H

    53 #define QPatternist_ResourceDelegator_p_H

    54 

    55 #include <QSet>

    56 #include <QUrl>

    57 

    58 #include "qdeviceresourceloader_p.h"

    59 

    60 QT_BEGIN_HEADER

    61 QT_BEGIN_NAMESPACE

    62 

    63 namespace QPatternist

    64 {

    65     /**

    66      * @short Delegates to another ResourceLoader, but in case a URI is in an

    67      * exception list, it delegates to a different loader.

    68      *

    69      * This is used for handling device variables, since when a device variable

    70      * is rebound, a resource loader needs to carry that binding, while the

    71      * resource loader for the other query remains as is.

    72      *

    73      * @since 4.5

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

    75      */

    76     class ResourceDelegator : public DeviceResourceLoader

    77     {

    78     public:

    79         ResourceDelegator(const QSet<QUrl> &needsOverride,

    80                           const ResourceLoader::Ptr &parentLoader,

    81                           const ResourceLoader::Ptr &forDeviceLoader) : m_needsOverride(needsOverride)

    82                                                                       , m_parentLoader(parentLoader)

    83                                                                       , m_forDeviceLoader(forDeviceLoader)

    84 

    85         {

    86             Q_ASSERT(m_parentLoader);

    87         }

    88 

    89         virtual bool isUnparsedTextAvailable(const QUrl &uri,

    90                                              const QString &encoding);

    91         virtual ItemType::Ptr announceUnparsedText(const QUrl &uri);

    92         virtual Item openUnparsedText(const QUrl &uri,

    93                                       const QString &encoding,

    94                                       const ReportContext::Ptr &context,

    95                                       const SourceLocationReflection *const where);

    96         virtual Item openDocument(const QUrl &uri,

    97                                   const ReportContext::Ptr &context);

    98         virtual SequenceType::Ptr announceDocument(const QUrl &uri, const Usage usageHint);

    99         virtual bool isDocumentAvailable(const QUrl &uri);

   100         virtual Item::Iterator::Ptr openCollection(const QUrl &uri);

   101         virtual SequenceType::Ptr announceCollection(const QUrl &uri);

   102 

   103         /**

   104          * Returns the union of the deviceURIs() that ResourceDelegator's two

   105          * resource loaders has.

   106          */

   107         virtual QSet<QUrl> deviceURIs() const;

   108 

   109     private:

   110         const QSet<QUrl> m_needsOverride;

   111         const ResourceLoader::Ptr m_parentLoader;

   112         const ResourceDelegator::Ptr m_forDeviceLoader;

   113     };

   114 }

   115 

   116 QT_END_NAMESPACE

   117 QT_END_HEADER

   118 

   119 #endif