Qt 4.8
qdistinctiterator.cpp
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41 
42 
43 #include "qdistinctiterator_p.h"
44 
46 
47 using namespace QPatternist;
48 
50  const AtomicComparator::Ptr &comp,
51  const Expression::ConstPtr &expression,
52  const DynamicContext::Ptr &context)
53  : m_seq(seq)
54  , m_context(context)
55  , m_expr(expression)
56  , m_position(0)
57 {
58  Q_ASSERT(seq);
59  prepareComparison(comp);
60 }
61 
63 {
64  if(m_position == -1)
65  return Item();
66 
67  const Item nitem(m_seq->next());
68  if(!nitem)
69  {
70  m_position = -1;
71  m_current.reset();
72  return Item();
73  }
74 
77 
78  for(; it != end; ++it)
79  {
80  if(flexibleCompare(*it, nitem, m_context))
81  {
82  return next();
83  }
84  }
85 
86  m_current = nitem;
87  ++m_position;
88  m_processed.append(nitem);
89  return nitem;
90 }
91 
93 {
94  return m_current;
95 }
96 
98 {
99  return m_position;
100 }
101 
103 {
105 }
106 
108 {
109  return m_expr.data();
110 }
111 
#define QT_END_NAMESPACE
This macro expands to.
Definition: qglobal.h:90
#define it(className, varName)
qint64 xsInteger
virtual Item::Iterator::Ptr copy() const
Copies this QAbstractXmlForwardIterator and returns the copy.
The QExplicitlySharedDataPointer class represents a pointer to an explicitly shared object...
Definition: qshareddata.h:136
const_iterator constBegin() const
Returns a const STL-style iterator pointing to the first item in the list.
Definition: qlist.h:269
#define Q_ASSERT(cond)
Definition: qglobal.h:1823
const Expression::ConstPtr m_expr
QExplicitlySharedDataPointer< QAbstractXmlForwardIterator< Item > > Ptr
A smart pointer wrapping an instance of a QAbstractXmlForwardIterator subclass.
friend class const_iterator
Definition: qlist.h:264
T * data() const
Returns a pointer to the shared data object.
Definition: qshareddata.h:145
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
const DynamicContext::Ptr m_context
The namespace for the internal API of QtXmlPatterns.
virtual Item next()
Returns the next item in the sequence, or a null object if the end has been reached.
const Item::Iterator::Ptr m_seq
DistinctIterator(const Item::Iterator::Ptr &seq, const AtomicComparator::Ptr &comp, const Expression::ConstPtr &expression, const DynamicContext::Ptr &context)
Represents an item in the XPath 2.0 Data Model.
Definition: qitem_p.h:182
bool flexibleCompare(const Item &it1, const Item &it2, const DynamicContext::Ptr &context) const
Compares it1 against it2, using comparator() and operatorID().
virtual const SourceLocationReflection * actualReflection() const
static const KeyPair *const end
virtual xsInteger position() const
Returns the current position in the sequence represented by this.
Base class for all instances that represents something at a certain location.
const_iterator constEnd() const
Returns a const STL-style iterator pointing to the imaginary item after the last item in the list...
Definition: qlist.h:272
void prepareComparison(const AtomicComparator::Ptr &comparator)
virtual Item current() const
Returns the current item in the sequence.