Qt 4.8
qdocumentfn.cpp
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41 
42 #include "qforclause_p.h"
43 #include "qfunctionfactory_p.h"
45 
46 #include "qdocumentfn_p.h"
47 
49 
50 using namespace QPatternist;
51 
53  const SequenceType::Ptr &reqType)
54 {
55  /* See the class documentation for the rewrite that we're doing here. */
56 
57  /* Generate type checking code for our operands such that they match. */
58  typeCheckOperands(context);
59 
60  const QSourceLocation myLocation(context->locationFor(this));
61  const FunctionFactory::Ptr functions(context->functionSignatures());
62 
63  Expression::Ptr uriSource;
64 
65  {
66  Expression::List distinctValuesArgs;
67  distinctValuesArgs.append(m_operands.first());
68 
69  uriSource = functions->createFunctionCall(QXmlName(StandardNamespaces::fn, StandardLocalNames::distinct_values),
70  distinctValuesArgs,
71  context,
72  this);
73  context->addLocation(uriSource.data(), myLocation);
74  }
75 
76  const VariableSlotID rangeSlot = context->allocateRangeSlot();
77  const Expression::Ptr uriReference(new RangeVariableReference(uriSource, rangeSlot));
78  context->addLocation(uriReference.data(), myLocation);
79 
80  Expression::List docArgs;
81 
82  if(m_operands.count() == 2)
83  {
84  Expression::List baseUriArgs;
85  baseUriArgs.append(uriReference);
86  baseUriArgs.append(m_operands.at(1));
87 
88  const Expression::Ptr fnBaseUri(functions->createFunctionCall(QXmlName(StandardNamespaces::fn, StandardLocalNames::resolve_uri),
89  baseUriArgs,
90  context,
91  this));
92  context->addLocation(fnBaseUri.data(), myLocation);
93  docArgs.append(fnBaseUri);
94  }
95  else
96  docArgs.append(uriReference);
97 
98  const Expression::Ptr fnDoc(functions->createFunctionCall(QXmlName(StandardNamespaces::fn, StandardLocalNames::doc),
99  docArgs,
100  context,
101  this));
102  context->addLocation(fnDoc.data(), myLocation);
103 
104 
105  Expression::Ptr newMe(new ForClause(rangeSlot,
106  uriSource,
107  fnDoc,
108  -1 /* We have no position variable. */));
109 
110  Expression::Ptr oldMe(this);
111  rewrite(oldMe, newMe, context);
112  return newMe->typeCheck(context, reqType);
113 }
114 
qint32 VariableSlotID
#define QT_END_NAMESPACE
This macro expands to.
Definition: qglobal.h:90
Implements XPath 2.0's for expression.
Definition: qforclause_p.h:72
virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context, const SequenceType::Ptr &reqType)
Definition: qexpression.cpp:70
int count(const T &t) const
Returns the number of occurrences of value in the list.
Definition: qlist.h:891
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
virtual VariableSlotID allocateRangeSlot()=0
#define QT_BEGIN_NAMESPACE
This macro expands to.
Definition: qglobal.h:89
void typeCheckOperands(const StaticContext::Ptr &context)
Definition: qexpression.cpp:78
static void rewrite(Expression::Ptr &old, const Expression::Ptr &New, const StaticContext::Ptr &context)
const T & at(int i) const
Returns the item at index position i in the list.
Definition: qlist.h:468
The namespace for the internal API of QtXmlPatterns.
The QSourceLocation class identifies a location in a resource by URI, line, and column.
virtual QExplicitlySharedDataPointer< FunctionFactory > functionSignatures() const =0
virtual QSourceLocation locationFor(const SourceLocationReflection *const reflection) const =0
Returns the source location applying for reflection.
T & first()
Returns a reference to the first item in the list.
Definition: qlist.h:282
virtual void addLocation(const SourceLocationReflection *const reflection, const QSourceLocation &location)=0
Adds location for reflection.
The QXmlName class represents the name of an XML node, in an efficient, namespace-aware way...
Definition: qxmlname.h:58
A reference to a variable declared with for or a quantification expression, but not for instance a le...
virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context, const SequenceType::Ptr &reqType)
Definition: qdocumentfn.cpp:52