Qt 4.8
qargumentconverter.cpp
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41 
42 #include "qitemmappingiterator_p.h"
44 
45 #include "qargumentconverter_p.h"
46 
48 
49 using namespace QPatternist;
50 
52  const ItemType::Ptr &reqType) : UntypedAtomicConverter(operand, reqType)
53 {
54 }
55 
57 {
58  return visitor->visit(this);
59 }
60 
62  const DynamicContext::Ptr &context) const
63 {
64  if(item.isAtomicValue() && !BuiltinTypes::xsUntypedAtomic->xdtTypeMatches(item.type()))
65  return makeSingletonIterator(item);
66  else
67  {
68  /* We're using UntypedAtomicConverter::mapToItem(). */
69  return makeItemMappingIterator<Item>(ConstPtr(this),
70  item.sequencedTypedValue(),
71  context);
72  }
73 }
74 
76 {
77  return makeSequenceMappingIterator<Item>(ConstPtr(this),
78  m_operand->evaluateSequence(context),
79  context);
80 }
81 
83 {
84  const Item item(m_operand->evaluateSingleton(context));
85 
86  if(item)
87  return mapToItem(item, context);
88  else /* Empty is allowed. ArgumentConverter doesn't care about cardinality. */
89  return Item();
90 }
91 
93 {
94  SequenceType::List result;
96  return result;
97 }
98 
100 {
102 }
103 
Item::Iterator::Ptr mapToSequence(const Item &item, const DynamicContext::Ptr &context) const
#define QT_END_NAMESPACE
This macro expands to.
Definition: qglobal.h:90
static const SequenceType::Ptr ZeroOrMoreItems
virtual SequenceType::Ptr staticType() const
QExplicitlySharedDataPointer< const ArgumentConverter > ConstPtr
Item mapToItem(const Item &item, const DynamicContext::Ptr &context) const
void append(const T &t)
Inserts value at the end of the list.
Definition: qlist.h:507
#define QT_BEGIN_NAMESPACE
This macro expands to.
Definition: qglobal.h:89
virtual SequenceType::List expectedOperandTypes() const
The namespace for the internal API of QtXmlPatterns.
virtual Item evaluateSingleton(const DynamicContext::Ptr &) const
QExplicitlySharedDataPointer< ItemType > type() const
Returns the ItemType this Item is of.
Definition: qitem_p.h:365
static const AtomicType::Ptr xsUntypedAtomic
bool isAtomicValue() const
Determines whether this item is an atomic value, or a node.
Definition: qitem_p.h:335
Represents an item in the XPath 2.0 Data Model.
Definition: qitem_p.h:182
ArgumentConverter(const Expression::Ptr &operand, const ItemType::Ptr &reqType)
Casts every item in a sequence obtained from evaluating an Expression, to a requested atomic type...
virtual Item::Iterator::Ptr evaluateSequence(const DynamicContext::Ptr &) const
static const SequenceType::Ptr ZeroOrMoreAtomicTypes
Item::Iterator::Ptr sequencedTypedValue() const
Returns the typed value of this item.
Definition: qitem.cpp:50
virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const
virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const
The QList class is a template class that provides lists.
Definition: qdatastream.h:62
virtual Item::Iterator::Ptr evaluateSequence(const DynamicContext::Ptr &context) const