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39
40#include "qboolean_p.h"
41#include "qdelegatingnamespaceresolver_p.h"
42#include "qinteger_p.h"
43#include "qqnameconstructor_p.h"
44
45#include "qfunctionavailablefn_p.h"
46
47QT_BEGIN_NAMESPACE
48
49using namespace QPatternist;
50
51Item FunctionAvailableFN::evaluateSingleton(const DynamicContext::Ptr &context) const
52{
53 const QString lexQName(m_operands.first()->evaluateSingleton(context).stringValue());
54
55 NamespaceResolver::Bindings override;
56 override.insert(akey: StandardPrefixes::empty, avalue: m_defFuncNS);
57
58 const NamespaceResolver::Ptr resolver(new DelegatingNamespaceResolver(staticNamespaces(), override));
59
60 const QXmlName name
61 (QNameConstructor::expandQName<DynamicContext::Ptr,
62 ReportContext::XTDE1400,
63 ReportContext::XTDE1400>(lexicalQName: lexQName,
64 context,
65 nsResolver: resolver,
66 r: this));
67
68 xsInteger arity;
69
70 if(m_operands.count() == 2)
71 arity = m_operands.at(i: 1)->evaluateSingleton(context).as<Numeric>()->toInteger();
72 else
73 arity = FunctionSignature::UnlimitedArity;
74
75 return Boolean::fromValue(value: m_functionFactory->isAvailable(np: context->namePool(), name, arity));
76}
77
78Expression::Ptr FunctionAvailableFN::typeCheck(const StaticContext::Ptr &context,
79 const SequenceType::Ptr &reqType)
80{
81 m_functionFactory = context->functionSignatures();
82 Q_ASSERT(m_functionFactory);
83 m_defFuncNS = context->namePool()->allocateNamespace(uri: context->defaultFunctionNamespace());
84 /* m_defFuncNS can be empty/null or an actual value. */
85
86 return StaticNamespacesContainer::typeCheck(context, reqType);
87}
88
89QT_END_NAMESPACE
90

source code of qtxmlpatterns/src/xmlpatterns/functions/qfunctionavailablefn.cpp