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39
40#include "qatomictype_p.h"
41#include "qbuiltintypes_p.h"
42#include "qcommonsequencetypes_p.h"
43#include "qgenericsequencetype_p.h"
44#include "qsequencemappingiterator_p.h"
45
46#include "qatomizer_p.h"
47
48QT_BEGIN_NAMESPACE
49
50using namespace QPatternist;
51
52Atomizer::Atomizer(const Expression::Ptr &operand) : SingleContainer(operand)
53{
54}
55
56Item::Iterator::Ptr Atomizer::mapToSequence(const Item &item, const DynamicContext::Ptr &) const
57{
58 /* Function & Operators, 2.4.2 fn:data, says "If the node does not have a
59 * typed value an error is raised [err:FOTY0012]."
60 * When does a node not have a typed value? */
61 Q_ASSERT(item);
62 return item.sequencedTypedValue();
63}
64
65Item::Iterator::Ptr Atomizer::evaluateSequence(const DynamicContext::Ptr &context) const
66{
67 return makeSequenceMappingIterator<Item>(mapper: ConstPtr(this),
68 source: m_operand->evaluateSequence(context),
69 context);
70}
71
72Item Atomizer::evaluateSingleton(const DynamicContext::Ptr &context) const
73{
74 const Item item(m_operand->evaluateSingleton(context));
75
76 if(!item) /* Empty is allowed, cardinality is considered '?' */
77 return Item();
78
79 const Item::Iterator::Ptr it(mapToSequence(item, context));
80 Q_ASSERT_X(it, Q_FUNC_INFO, "A valid QAbstractXmlForwardIterator must always be returned.");
81
82 Item result(it->next());
83 Q_ASSERT_X(!it->next(), Q_FUNC_INFO,
84 "evaluateSingleton should never be used if the cardinality is two or more");
85
86 return result;
87}
88
89Expression::Ptr Atomizer::typeCheck(const StaticContext::Ptr &context,
90 const SequenceType::Ptr &reqType)
91{
92 /* Compress -- the earlier the better. */
93 if(BuiltinTypes::xsAnyAtomicType->xdtTypeMatches(other: m_operand->staticType()->itemType()))
94 return m_operand->typeCheck(context, reqType);
95
96 return SingleContainer::typeCheck(context, reqType);
97}
98
99SequenceType::Ptr Atomizer::staticType() const
100{
101 const SequenceType::Ptr opt(m_operand->staticType());
102 return makeGenericSequenceType(itemType: opt->itemType()->atomizedType(),
103 cardinality: opt->cardinality());
104}
105
106SequenceType::List Atomizer::expectedOperandTypes() const
107{
108 SequenceType::List result;
109 result.append(t: CommonSequenceTypes::ZeroOrMoreItems);
110 return result;
111}
112
113ExpressionVisitorResult::Ptr Atomizer::accept(const ExpressionVisitor::Ptr &visitor) const
114{
115 return visitor->visit(this);
116}
117
118const SourceLocationReflection *Atomizer::actualReflection() const
119{
120 return m_operand->actualReflection();
121}
122
123QT_END_NAMESPACE
124

source code of qtxmlpatterns/src/xmlpatterns/janitors/qatomizer.cpp