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#include "qitem_p.h"
#include "qcommonsequencetypes_p.h"
#include "qgenericsequencetype_p.h"
#include "qitemmappingiterator_p.h"

#include "quntypedatomicconverter_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

UntypedAtomicConverter::UntypedAtomicConverter(const Expression::Ptr &operand,
                                               const ItemType::Ptr &reqType,
                                               const ReportContext::ErrorCode code) : SingleContainer(operand)
                                                                                    , CastingPlatform<UntypedAtomicConverter, true>(code)
                                                                                    , m_reqType(reqType)
{
    Q_ASSERT(reqType);
}

Item::Iterator::Ptr UntypedAtomicConverter::evaluateSequence(const DynamicContext::Ptr &context) const
{
    return makeItemMappingIterator<Item>(ConstPtr(this),
                                         m_operand->evaluateSequence(context),
                                         context);
}

Item UntypedAtomicConverter::evaluateSingleton(const DynamicContext::Ptr &context) const
{
    const Item item(m_operand->evaluateSingleton(context));

    if(item)
        return cast(item, context);
    else /* Empty is allowed. UntypedAtomicConverter doesn't care about cardinality. */
        return Item();
}

Expression::Ptr UntypedAtomicConverter::typeCheck(const StaticContext::Ptr &context,
                                                  const SequenceType::Ptr &reqType)
{
    const Expression::Ptr me(SingleContainer::typeCheck(context, reqType));

    /* Let the CastingPlatform look up its AtomicCaster. */
    prepareCasting(context, m_operand->staticType()->itemType());

    return me;
}

SequenceType::List UntypedAtomicConverter::expectedOperandTypes() const
{
    SequenceType::List result;
    result.append(CommonSequenceTypes::ZeroOrMoreAtomicTypes);
    return result;
}

SequenceType::Ptr UntypedAtomicConverter::staticType() const
{
    return makeGenericSequenceType(m_reqType,
                                   m_operand->staticType()->cardinality());
}

ExpressionVisitorResult::Ptr UntypedAtomicConverter::accept(const ExpressionVisitor::Ptr &visitor) const
{
    return visitor->visit(this);
}

const SourceLocationReflection *UntypedAtomicConverter::actualReflection() const
{
    return m_operand.data();
}

QT_END_NAMESPACE
