tests/auto/xmlpatternsxqts/lib/ExternalSourceLoader.cpp
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     1 /****************************************************************************
       
     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 test suite of the Qt Toolkit.
       
     8 **
       
     9 ** $QT_BEGIN_LICENSE:LGPL$
       
    10 ** No Commercial Usage
       
    11 ** This file contains pre-release code and may not be distributed.
       
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    13 ** contained in the Technology Preview License Agreement accompanying
       
    14 ** this package.
       
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    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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    29 ** Nokia at qt-info@nokia.com.
       
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    33 **
       
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    36 **
       
    37 **
       
    38 ** $QT_END_LICENSE$
       
    39 **
       
    40 ****************************************************************************/
       
    41 
       
    42 #include <QCoreApplication>
       
    43 #include <QFile>
       
    44 #include <QtDebug>
       
    45 #include <QXmlResultItems>
       
    46 #include <QXmlNamePool>
       
    47 
       
    48 #include "Global.h"
       
    49 
       
    50 #include "qcommonsequencetypes_p.h"
       
    51 #include "qdebug_p.h"
       
    52 #include "qatomicstring_p.h"
       
    53 
       
    54 #include "ExternalSourceLoader.h"
       
    55 
       
    56 using namespace QPatternistSDK;
       
    57 using namespace QPatternist;
       
    58 
       
    59 ExternalSourceLoader::ExternalSourceLoader(const VariableMap &varMap,
       
    60                                            const QPatternist::ResourceLoader::Ptr &r) : m_variableMap(varMap)
       
    61                                                                                       , m_resourceLoader(r)
       
    62                                                                                       , m_query(Global::namePoolAsPublic())
       
    63 {
       
    64     Q_ASSERT(m_resourceLoader);
       
    65 }
       
    66 
       
    67 QPatternist::SequenceType::Ptr
       
    68 ExternalSourceLoader::announceExternalVariable(const QXmlName name,
       
    69                                                const QPatternist::SequenceType::Ptr &declaredType)
       
    70 {
       
    71     pDebug() << "ExternalSourceLoader::announceExternalVariable()";
       
    72     Q_ASSERT(!name.isNull());
       
    73     Q_ASSERT(declaredType);
       
    74     Q_UNUSED(declaredType); /* Needed when bulding in release mode. */
       
    75 
       
    76     if(name.namespaceURI() == QPatternist::StandardNamespaces::empty)
       
    77     {
       
    78         const VariableValue variable(m_variableMap.value(Global::namePool()->stringForLocalName(name.localName())));
       
    79 
       
    80         if(variable.first.isEmpty())
       
    81             return QPatternist::SequenceType::Ptr();
       
    82         else
       
    83         {
       
    84             /* If announceDocument() can't load a document for uriForVar, it will return
       
    85              * null, which we will too, which is fine, since we can't supply a value for
       
    86              * this variable then. */
       
    87             if(variable.second == Document)
       
    88                 return m_resourceLoader->announceDocument(variable.first, QPatternist::ResourceLoader::WillUse);
       
    89             else if(variable.second == URI)
       
    90             {
       
    91                 return QPatternist::CommonSequenceTypes::ExactlyOneString;
       
    92             }
       
    93             else
       
    94             {
       
    95                 /* The type is Query, and we don't pre-load
       
    96                  * them. No particular reason, just not worth it. */
       
    97                 return QPatternist::CommonSequenceTypes::ZeroOrMoreItems;
       
    98             }
       
    99         }
       
   100     }
       
   101     else
       
   102         return QPatternist::SequenceType::Ptr();
       
   103 }
       
   104 
       
   105 QPatternist::Item
       
   106 ExternalSourceLoader::evaluateSingleton(const QXmlName name,
       
   107                                         const QPatternist::DynamicContext::Ptr &context)
       
   108 {
       
   109     Q_ASSERT(!name.isNull());
       
   110     const VariableValue variable(m_variableMap.value(Global::namePool()->stringForLocalName(name.localName())));
       
   111 
       
   112     if(variable.second == Document)
       
   113     {
       
   114         Q_ASSERT_X(QFile::exists(variable.first.toLocalFile()), Q_FUNC_INFO,
       
   115                    qPrintable(QString::fromLatin1("The file %1 doesn't exist").arg(variable.first.toLocalFile())));
       
   116         Q_ASSERT_X(m_resourceLoader->openDocument(variable.first, context), Q_FUNC_INFO,
       
   117                    "We're supposed to have the value. If not, an error should have been issued at query compile time.");
       
   118 
       
   119         return m_resourceLoader->openDocument(variable.first, context);
       
   120     }
       
   121     else if(variable.second == Query)
       
   122     {
       
   123         /* Well, here we open the file and execute it. */
       
   124         m_query.setQuery(QUrl::fromLocalFile(variable.first.toLocalFile()));
       
   125         Q_ASSERT(m_query.isValid());
       
   126 
       
   127         QXmlResultItems result;
       
   128         m_query.evaluateTo(&result);
       
   129 
       
   130         return QPatternist::Item::fromPublic(result.next());
       
   131     }
       
   132     else
       
   133     {
       
   134         Q_ASSERT(variable.second == URI);
       
   135         return QPatternist::AtomicString::fromValue(variable.first.toString());
       
   136     }
       
   137 }
       
   138 
       
   139 // vim: et:ts=4:sw=4:sts=4
       
   140