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42 #include "qatomictype_p.h"
43 #include "qbuiltintypes_p.h"
44 #include "qcommonsequencetypes_p.h"
45 #include "qgenericsequencetype_p.h"
46 #include "qsequencemappingiterator_p.h"
48 #include "qatomizer_p.h"
52 using namespace QPatternist;
54 Atomizer::Atomizer(const Expression::Ptr &operand) : SingleContainer(operand)
58 Item::Iterator::Ptr Atomizer::mapToSequence(const Item &item, const DynamicContext::Ptr &) const
60 /* Function & Operators, 2.4.2 fn:data, says "If the node does not have a
61 * typed value an error is raised [err:FOTY0012]."
62 * When does a node not have a typed value? */
64 return item.sequencedTypedValue();
67 Item::Iterator::Ptr Atomizer::evaluateSequence(const DynamicContext::Ptr &context) const
69 return makeSequenceMappingIterator<Item>(ConstPtr(this),
70 m_operand->evaluateSequence(context),
74 Item Atomizer::evaluateSingleton(const DynamicContext::Ptr &context) const
76 const Item item(m_operand->evaluateSingleton(context));
78 if(!item) /* Empty is allowed, cardinality is considered '?' */
81 const Item::Iterator::Ptr it(mapToSequence(item, context));
82 Q_ASSERT_X(it, Q_FUNC_INFO, "A valid QAbstractXmlForwardIterator must always be returned.");
84 Item result(it->next());
85 Q_ASSERT_X(!it->next(), Q_FUNC_INFO,
86 "evaluateSingleton should never be used if the cardinality is two or more");
91 Expression::Ptr Atomizer::typeCheck(const StaticContext::Ptr &context,
92 const SequenceType::Ptr &reqType)
94 /* Compress -- the earlier the better. */
95 if(BuiltinTypes::xsAnyAtomicType->xdtTypeMatches(m_operand->staticType()->itemType()))
96 return m_operand->typeCheck(context, reqType);
98 return SingleContainer::typeCheck(context, reqType);
101 SequenceType::Ptr Atomizer::staticType() const
103 const SequenceType::Ptr opt(m_operand->staticType());
104 return makeGenericSequenceType(opt->itemType()->atomizedType(),
108 SequenceType::List Atomizer::expectedOperandTypes() const
110 SequenceType::List result;
111 result.append(CommonSequenceTypes::ZeroOrMoreItems);
115 ExpressionVisitorResult::Ptr Atomizer::accept(const ExpressionVisitor::Ptr &visitor) const
117 return visitor->visit(this);
120 const SourceLocationReflection *Atomizer::actualReflection() const
122 return m_operand->actualReflection();