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     7 ** This file is part of the QtXmlPatterns module of the Qt Toolkit.

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    41 

    42 #include "qatomictype_p.h"

    43 #include "qbuiltintypes_p.h"

    44 #include "qcommonsequencetypes_p.h"

    45 #include "qgenericsequencetype_p.h"

    46 #include "qsequencemappingiterator_p.h"

    47 

    48 #include "qatomizer_p.h"

    49 

    50 QT_BEGIN_NAMESPACE

    51 

    52 using namespace QPatternist;

    53 

    54 Atomizer::Atomizer(const Expression::Ptr &operand) : SingleContainer(operand)

    55 {

    56 }

    57 

    58 Item::Iterator::Ptr Atomizer::mapToSequence(const Item &item, const DynamicContext::Ptr &) const

    59 {

    60     /* Function & Operators, 2.4.2 fn:data, says "If the node does not have a

    61      * typed value an error is raised [err:FOTY0012]."

    62      * When does a node not have a typed value? */

    63     Q_ASSERT(item);

    64     return item.sequencedTypedValue();

    65 }

    66 

    67 Item::Iterator::Ptr Atomizer::evaluateSequence(const DynamicContext::Ptr &context) const

    68 {

    69     return makeSequenceMappingIterator<Item>(ConstPtr(this),

    70                                              m_operand->evaluateSequence(context),

    71                                              context);

    72 }

    73 

    74 Item Atomizer::evaluateSingleton(const DynamicContext::Ptr &context) const

    75 {

    76     const Item item(m_operand->evaluateSingleton(context));

    77 

    78     if(!item) /* Empty is allowed, cardinality is considered '?' */

    79         return Item();

    80 

    81     const Item::Iterator::Ptr it(mapToSequence(item, context));

    82     Q_ASSERT_X(it, Q_FUNC_INFO, "A valid QAbstractXmlForwardIterator must always be returned.");

    83 

    84     Item result(it->next());

    85     Q_ASSERT_X(!it->next(), Q_FUNC_INFO,

    86                "evaluateSingleton should never be used if the cardinality is two or more");

    87 

    88     return result;

    89 }

    90 

    91 Expression::Ptr Atomizer::typeCheck(const StaticContext::Ptr &context,

    92                                     const SequenceType::Ptr &reqType)

    93 {

    94     /* Compress -- the earlier the better. */

    95     if(BuiltinTypes::xsAnyAtomicType->xdtTypeMatches(m_operand->staticType()->itemType()))

    96         return m_operand->typeCheck(context, reqType);

    97 

    98     return SingleContainer::typeCheck(context, reqType);

    99 }

   100 

   101 SequenceType::Ptr Atomizer::staticType() const

   102 {

   103     const SequenceType::Ptr opt(m_operand->staticType());

   104     return makeGenericSequenceType(opt->itemType()->atomizedType(),

   105                                    opt->cardinality());

   106 }

   107 

   108 SequenceType::List Atomizer::expectedOperandTypes() const

   109 {

   110     SequenceType::List result;

   111     result.append(CommonSequenceTypes::ZeroOrMoreItems);

   112     return result;

   113 }

   114 

   115 ExpressionVisitorResult::Ptr Atomizer::accept(const ExpressionVisitor::Ptr &visitor) const

   116 {

   117     return visitor->visit(this);

   118 }

   119 

   120 const SourceLocationReflection *Atomizer::actualReflection() const

   121 {

   122     return m_operand->actualReflection();

   123 }

   124 

   125 QT_END_NAMESPACE