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#include "qexternalvariablereference_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

ExternalVariableReference::ExternalVariableReference(const QXmlName &name,
                                                     const SequenceType::Ptr &type) : m_name(name),
                                                                                      m_seqType(type)
{
    Q_ASSERT(!m_name.isNull());
    Q_ASSERT(m_seqType);
}

Item::Iterator::Ptr ExternalVariableReference::evaluateSequence(const DynamicContext::Ptr &context) const
{
    Q_ASSERT(context->externalVariableLoader());
    return context->externalVariableLoader()->evaluateSequence(m_name, context);
}

Item ExternalVariableReference::evaluateSingleton(const DynamicContext::Ptr &context) const
{
    return context->externalVariableLoader()->evaluateSingleton(m_name, context);
}

bool ExternalVariableReference::evaluateEBV(const DynamicContext::Ptr &context) const
{
    return context->externalVariableLoader()->evaluateEBV(m_name, context);
}

SequenceType::Ptr ExternalVariableReference::staticType() const
{
    return m_seqType;
}

Expression::Properties ExternalVariableReference::properties() const
{
    return DisableElimination;
}

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

QT_END_NAMESPACE