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39
40
41#include "qdistinctiterator_p.h"
42
43QT_BEGIN_NAMESPACE
44
45using namespace QPatternist;
46
47DistinctIterator::DistinctIterator(const Item::Iterator::Ptr &seq,
48 const AtomicComparator::Ptr &comp,
49 const Expression::ConstPtr &expression,
50 const DynamicContext::Ptr &context)
51 : m_seq(seq)
52 , m_context(context)
53 , m_expr(expression)
54 , m_position(0)
55{
56 Q_ASSERT(seq);
57 prepareComparison(c: comp);
58}
59
60Item DistinctIterator::next()
61{
62 if(m_position == -1)
63 return Item();
64
65 const Item nitem(m_seq->next());
66 if(!nitem)
67 {
68 m_position = -1;
69 m_current.reset();
70 return Item();
71 }
72
73 const Item::List::const_iterator end(m_processed.constEnd());
74 Item::List::const_iterator it(m_processed.constBegin());
75
76 for(; it != end; ++it)
77 {
78 if(flexibleCompare(it1: *it, it2: nitem, context: m_context))
79 {
80 return next();
81 }
82 }
83
84 m_current = nitem;
85 ++m_position;
86 m_processed.append(t: nitem);
87 return nitem;
88}
89
90Item DistinctIterator::current() const
91{
92 return m_current;
93}
94
95xsInteger DistinctIterator::position() const
96{
97 return m_position;
98}
99
100Item::Iterator::Ptr DistinctIterator::copy() const
101{
102 return Item::Iterator::Ptr(new DistinctIterator(m_seq->copy(), comparator(), m_expr, m_context));
103}
104
105const SourceLocationReflection *DistinctIterator::actualReflection() const
106{
107 return m_expr.data();
108}
109
110QT_END_NAMESPACE
111

source code of qtxmlpatterns/src/xmlpatterns/iterators/qdistinctiterator.cpp