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

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

#include "qpatternistlocale_p.h"

#include "qabstractfunctionfactory_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

Expression::Ptr AbstractFunctionFactory::createFunctionCall(const QXmlName name,

                                                            const Expression::List &args,

                                                            const StaticContext::Ptr &context,

                                                            const SourceLocationReflection *const r)

{

    const FunctionSignature::Ptr sign(retrieveFunctionSignature(context->namePool(), name));

    if(!sign) /* The function doesn't exist(at least not in this factory). */

        return Expression::Ptr();

    /* May throw. */

    verifyArity(sign, context, args.count(), r);

    /* Ok, the function does exist and the arity is correct. */

    return retrieveExpression(name, args, sign);

}

void AbstractFunctionFactory::verifyArity(const FunctionSignature::Ptr &s,

                                          const StaticContext::Ptr &context,

                                          const xsInteger arity,

                                          const SourceLocationReflection *const r) const

{

    /* Same code in both branches, but more specific error messages in order

     * to improve usability. */

    if(s->maximumArguments() != FunctionSignature::UnlimitedArity &&

       arity > s->maximumArguments())

    {

        context->error(QtXmlPatterns::tr("%1 takes at most %n argument(s). "

                                         "%2 is therefore invalid.", 0, s->maximumArguments())

                          .arg(formatFunction(context->namePool(), s))

                          .arg(arity),

                       ReportContext::XPST0017,

                       r);

        return;

    }

    if(arity < s->minimumArguments())

    {

        context->error(QtXmlPatterns::tr("%1 requires at least %n argument(s). "

                                         "%2 is therefore invalid.", 0, s->minimumArguments())

                          .arg(formatFunction(context->namePool(), s))

                          .arg(arity),

                       ReportContext::XPST0017,

                       r);

        return;

    }

}

FunctionSignature::Hash AbstractFunctionFactory::functionSignatures() const

{

    return m_signatures;

}

QT_END_NAMESPACE