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

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** this package.

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** $QT_END_LICENSE$

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****************************************************************************/

#include "qcommonsequencetypes_p.h"

#include "qpatternistlocale_p.h"

#include "qqnamevalue_p.h"

#include "qatomicstring_p.h"

#include "qerrorfn_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

Item ErrorFN::evaluateSingleton(const DynamicContext::Ptr &context) const

{

    QString msg;

    switch(m_operands.count())

    {

        case 0: /* No args. */

        {

            context->error(QtXmlPatterns::tr("%1 was called.").arg(formatFunction(context->namePool(), signature())),

                            ReportContext::FOER0000, this);

            return Item();

        }

        case 3:

        /* Fallthrough, we don't use the 'error object' param. */

        case 2:

            msg = m_operands.at(1)->evaluateSingleton(context).stringValue();

        /* Fall through. */

        case 1:

        {

            const QNameValue::Ptr qName(m_operands.first()->evaluateSingleton(context).as<QNameValue>());

            if(qName)

                context->error(msg, qName->qName(), this);

            else

                context->error(msg, ReportContext::FOER0000, this);

            return Item();

        }

        default:

        {

            Q_ASSERT_X(false, Q_FUNC_INFO,

                       "Invalid number of arguments passed to fn:error.");

            return Item();

        }

    }

}

FunctionSignature::Ptr ErrorFN::signature() const

{

    const FunctionSignature::Ptr e(FunctionCall::signature());

    if(m_operands.count() != 1)

        return e;

    FunctionSignature::Ptr nev(FunctionSignature::Ptr(new FunctionSignature(e->name(),

                                                      e->minimumArguments(),

                                                      e->maximumArguments(),

                                                      e->returnType(),

                                                      e->properties())));

    const FunctionArgument::List args(e->arguments());

    FunctionArgument::List nargs;

    const QXmlName argName(StandardNamespaces::empty, StandardLocalNames::error);

    nargs.append(FunctionArgument::Ptr(new FunctionArgument(argName, CommonSequenceTypes::ExactlyOneQName)));

    nargs.append(args[1]);

    nargs.append(args[2]);

    nev->setArguments(nargs);

    return nev;

}

QT_END_NAMESPACE