source: trunk/src/xmlpatterns/functions/qfunctionavailablefn.cpp@ 878

Last change on this file since 878 was 846, checked in by Dmitry A. Kuminov, 14 years ago

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.

File size: 3.7 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation ([email protected])
6**
7** This file is part of the QtXmlPatterns module of the Qt Toolkit.
8**
9** $QT_BEGIN_LICENSE:LGPL$
10** Commercial Usage
11** Licensees holding valid Qt Commercial licenses may use this file in
12** accordance with the Qt Commercial License Agreement provided with the
13** Software or, alternatively, in accordance with the terms contained in
14** a written agreement between you and Nokia.
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
22** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
23**
24** In addition, as a special exception, Nokia gives you certain additional
25** rights. These rights are described in the Nokia Qt LGPL Exception
26** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
27**
28** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
34** met: http://www.gnu.org/copyleft/gpl.html.
35**
36** If you have questions regarding the use of this file, please contact
37** Nokia at [email protected].
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
49QT_BEGIN_NAMESPACE
50
51using namespace QPatternist;
52
53Item 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
80Expression::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
91QT_END_NAMESPACE
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