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

    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

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    38 ** $QT_END_LICENSE$

    39 **

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

    41 

    42 #include "qboolean_p.h"

    43 #include "qdelegatingnamespaceresolver_p.h"

    44 #include "qinteger_p.h"

    45 #include "qqnameconstructor_p.h"

    46 

    47 #include "qfunctionavailablefn_p.h"

    48 

    49 QT_BEGIN_NAMESPACE

    50 

    51 using namespace QPatternist;

    52 

    53 Item FunctionAvailableFN::evaluateSingleton(const DynamicContext::Ptr &context) const

    54 {

    55     const QString lexQName(m_operands.first()->evaluateSingleton(context).stringValue());

    56 

    57     NamespaceResolver::Bindings override;

    58     override.insert(StandardPrefixes::empty, m_defFuncNS);

    59 

    60     const NamespaceResolver::Ptr resolver(new DelegatingNamespaceResolver(staticNamespaces(), override));

    61 

    62     const QXmlName name

    63         (QNameConstructor::expandQName<DynamicContext::Ptr,

    64                                        ReportContext::XTDE1400,

    65                                        ReportContext::XTDE1400>(lexQName,

    66                                                                 context,

    67                                                                 resolver,

    68                                                                 this));

    69 

    70     xsInteger arity;

    71 

    72     if(m_operands.count() == 2)

    73         arity = m_operands.at(1)->evaluateSingleton(context).as<Numeric>()->toInteger();

    74     else

    75         arity = FunctionSignature::UnlimitedArity;

    76 

    77     return Boolean::fromValue(m_functionFactory->isAvailable(context->namePool(), name, arity));

    78 }

    79 

    80 Expression::Ptr FunctionAvailableFN::typeCheck(const StaticContext::Ptr &context,

    81                                                const SequenceType::Ptr &reqType)

    82 {

    83     m_functionFactory = context->functionSignatures();

    84     Q_ASSERT(m_functionFactory);

    85     m_defFuncNS = context->namePool()->allocateNamespace(context->defaultFunctionNamespace());

    86     /* m_defFuncNS can be empty/null or an actual value. */

    87 

    88     return StaticNamespacesContainer::typeCheck(context, reqType);

    89 }

    90 

    91 QT_END_NAMESPACE