Qt 4.8
qtracefn.cpp
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41 
42 #include "qcommonsequencetypes_p.h"
43 #include "qcommonvalues_p.h"
44 #include "qitemmappingiterator_p.h"
45 #include "qpatternistlocale_p.h"
46 
47 #include "qtracefn_p.h"
48 
50 
51 using namespace QPatternist;
52 
53 namespace QPatternist
54 {
66  class TraceCallback : public QSharedData
67  {
68  public:
70 
71  inline TraceCallback(const QString &msg) : m_position(0),
72  m_msg(msg)
73  {
74  }
75 
79  Item mapToItem(const Item &item,
80  const DynamicContext::Ptr &context)
81  {
82  QTextStream out(stderr);
83  ++m_position;
84  if(m_position == 1)
85  {
86  if(item)
87  {
88  out << qPrintable(m_msg)
89  << " : "
90  << qPrintable(item.stringValue());
91  }
92  else
93  {
94  out << qPrintable(m_msg)
95  << " : ("
97  << ")\n";
98  return Item();
99  }
100  }
101  else
102  {
103  out << qPrintable(item.stringValue())
104  << '['
105  << m_position
106  << "]\n";
107  }
108 
109  return item;
110  }
111 
112  private:
114  const QString m_msg;
115  };
116 }
117 
119 {
120  const QString msg(m_operands.last()->evaluateSingleton(context).stringValue());
121 
122  return makeItemMappingIterator<Item>(TraceCallback::Ptr(new TraceCallback(msg)),
123  m_operands.first()->evaluateSequence(context),
124  context);
125 }
126 
128 {
129  const QString msg(m_operands.last()->evaluateSingleton(context).stringValue());
130  const Item item(m_operands.first()->evaluateSingleton(context));
131 
132  return TraceCallback::Ptr(new TraceCallback(msg))->mapToItem(item, context);
133 }
134 
136 {
137  return m_operands.first()->staticType();
138 }
139 
virtual NamePool::Ptr namePool() const =0
#define QT_END_NAMESPACE
This macro expands to.
Definition: qglobal.h:90
Item mapToItem(const Item &item, const DynamicContext::Ptr &context)
Definition: qtracefn.cpp:79
qint64 xsInteger
QString formatType(const NamePool::Ptr &np, const T &type)
Formats ItemType and SequenceType.
The QExplicitlySharedDataPointer class represents a pointer to an explicitly shared object...
Definition: qshareddata.h:136
The QString class provides a Unicode character string.
Definition: qstring.h:83
TraceCallback(const QString &msg)
Definition: qtracefn.cpp:71
virtual Item::Iterator::Ptr evaluateSequence(const DynamicContext::Ptr &context) const
Definition: qtracefn.cpp:118
#define QT_BEGIN_NAMESPACE
This macro expands to.
Definition: qglobal.h:89
TraceCallback is a MappingCallback and takes care of the tracing of each individual item...
Definition: qtracefn.cpp:66
virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const
Definition: qtracefn.cpp:127
The namespace for the internal API of QtXmlPatterns.
QString stringValue() const
Returns the string value of this Item.
Definition: qitem_p.h:302
static const EmptySequenceType::Ptr Empty
Contains functions used for formatting arguments, such as keywords and paths, in translated strings...
Represents an item in the XPath 2.0 Data Model.
Definition: qitem_p.h:182
The QSharedData class is a base class for shared data objects.
Definition: qshareddata.h:56
The QTextStream class provides a convenient interface for reading and writing text.
Definition: qtextstream.h:73
#define qPrintable(string)
Definition: qglobal.h:1750
QExplicitlySharedDataPointer< TraceCallback > Ptr
Definition: qtracefn.cpp:69
virtual SequenceType::Ptr staticType() const
Definition: qtracefn.cpp:135