Qt 4.8
qcopyof.cpp
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41 
42 #include "qbuiltintypes_p.h"
43 #include "qcommonsequencetypes_p.h"
44 #include "qitemmappingiterator_p.h"
45 
46 #include "qcopyof_p.h"
47 
49 
50 using namespace QPatternist;
51 
53  const bool inheritNSS,
54  const bool preserveNSS) : SingleContainer(operand)
55  , m_inheritNamespaces(inheritNSS)
56  , m_preserveNamespaces(preserveNSS)
57  , m_settings((m_inheritNamespaces ? QAbstractXmlNodeModel::InheritNamespaces : QAbstractXmlNodeModel::NodeCopySettings()) |
58  (m_preserveNamespaces ? QAbstractXmlNodeModel::PreserveNamespaces : QAbstractXmlNodeModel::NodeCopySettings()))
59 {
60 }
61 
63 {
64  /* We have zero effect if we have these settings. */
66  return m_operand->compress(context);
67  else
68  {
70  /* We have no effect on the empty sequence or atomic values. */
71  if(BuiltinTypes::xsAnyAtomicType->xdtTypeMatches(t)
73  return m_operand->compress(context);
74  else
75  return SingleContainer::compress(context);
76  }
77 }
78 
80 {
81  /* Optimization: this completely breaks streaming. We get a call to
82  * evaluateToSequenceReceiver() but we require heap allocations by calling
83  * evaluateSequence(). */
84 
86  QAbstractXmlReceiver *const receiver = context->outputReceiver();
87  Item next(it->next());
88 
89  while(next)
90  {
91  if(next.isNode())
92  {
93  const QXmlNodeModelIndex &asNode = next.asNode();
94  asNode.model()->copyNodeTo(asNode, receiver, m_settings);
95  }
96  else
97  receiver->item(next);
98 
99  next = it->next();
100  }
101 }
102 
104 {
105  return visitor->visit(this);
106 }
107 
109 {
110  return m_operand->staticType();
111 }
112 
114 {
115  SequenceType::List result;
117  return result;
118 }
119 
121 {
122  /* We have the content of node constructors as children, but even though
123  * createCopyOf() typically avoids creating us, we can still end up with an operand
124  * that allows compression. We must always avoid that, because we don't have
125  * implementation of evaluateSequence(), and so on. */
127 }
128 
130 {
132 }
133 
virtual Properties properties() const
Definition: qcopyof.cpp:120
The QXmlNodeModelIndex class identifies a node in an XML node model subclassed from QAbstractXmlNodeM...
A push interface for the XPath Data Model. Similar to SAX's ContentHandler.
#define QT_END_NAMESPACE
This macro expands to.
Definition: qglobal.h:90
static const SequenceType::Ptr ZeroOrMoreItems
#define it(className, varName)
virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const
Definition: qcopyof.cpp:103
virtual ItemType::Ptr expectedContextItemType() const
virtual Expression::Ptr compress(const StaticContext::Ptr &context)
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 bool m_inheritNamespaces
Definition: qcopyof_p.h:111
virtual void evaluateToSequenceReceiver(const DynamicContext::Ptr &context) const
Definition: qcopyof.cpp:79
The QAbstractXmlNodeModel class is an abstract base class for modeling non-XML data to look like XML ...
The namespace for the internal API of QtXmlPatterns.
virtual SequenceType::Ptr staticType() const
Definition: qcopyof.cpp:108
virtual SequenceType::List expectedOperandTypes() const
Definition: qcopyof.cpp:113
const QAbstractXmlNodeModel * model() const
Returns the QAbstractXmlNodeModel that this node index refers to.
virtual SequenceType::Ptr staticType() const =0
static const EmptySequenceType::Ptr Empty
Represents an item in the XPath 2.0 Data Model.
Definition: qitem_p.h:182
virtual Properties properties() const
const bool m_preserveNamespaces
Definition: qcopyof_p.h:112
virtual ItemType::Ptr expectedContextItemType() const
Definition: qcopyof.cpp:129
static const AtomicType::Ptr xsAnyAtomicType
The QFlags class provides a type-safe way of storing OR-combinations of enum values.
Definition: qglobal.h:2313
virtual ItemType::Ptr itemType() const =0
virtual QAbstractXmlReceiver * outputReceiver() const =0
CopyOf(const Expression::Ptr &operand, const bool inheritNSS, const bool preserveNSS)
Definition: qcopyof.cpp:52
virtual Expression::Ptr compress(const StaticContext::Ptr &context)
Definition: qcopyof.cpp:62
const QAbstractXmlNodeModel::NodeCopySettings m_settings
Definition: qcopyof_p.h:113
virtual void copyNodeTo(const QXmlNodeModelIndex &node, QAbstractXmlReceiver *const receiver, const NodeCopySettings &) 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
Base class for expressions that has exactly one operand.