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** This file is part of the test suite of the Qt Toolkit.

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#include <QCoreApplication>

#include <QFile>

#include <QtDebug>

#include <QXmlResultItems>

#include <QXmlNamePool>

#include "Global.h"

#include "qcommonsequencetypes_p.h"

#include "qdebug_p.h"

#include "qatomicstring_p.h"

#include "ExternalSourceLoader.h"

using namespace QPatternistSDK;

using namespace QPatternist;

ExternalSourceLoader::ExternalSourceLoader(const VariableMap &varMap,

                                           const QPatternist::ResourceLoader::Ptr &r) : m_variableMap(varMap)

                                                                                      , m_resourceLoader(r)

                                                                                      , m_query(Global::namePoolAsPublic())

{

    Q_ASSERT(m_resourceLoader);

}

QPatternist::SequenceType::Ptr

ExternalSourceLoader::announceExternalVariable(const QXmlName name,

                                               const QPatternist::SequenceType::Ptr &declaredType)

{

    pDebug() << "ExternalSourceLoader::announceExternalVariable()";

    Q_ASSERT(!name.isNull());

    Q_ASSERT(declaredType);

    Q_UNUSED(declaredType); /* Needed when bulding in release mode. */

    if(name.namespaceURI() == QPatternist::StandardNamespaces::empty)

    {

        const VariableValue variable(m_variableMap.value(Global::namePool()->stringForLocalName(name.localName())));

        if(variable.first.isEmpty())

            return QPatternist::SequenceType::Ptr();

        else

        {

            /* If announceDocument() can't load a document for uriForVar, it will return

             * null, which we will too, which is fine, since we can't supply a value for

             * this variable then. */

            if(variable.second == Document)

                return m_resourceLoader->announceDocument(variable.first, QPatternist::ResourceLoader::WillUse);

            else if(variable.second == URI)

            {

                return QPatternist::CommonSequenceTypes::ExactlyOneString;

            }

            else

            {

                /* The type is Query, and we don't pre-load

                 * them. No particular reason, just not worth it. */

                return QPatternist::CommonSequenceTypes::ZeroOrMoreItems;

            }

        }

    }

    else

        return QPatternist::SequenceType::Ptr();

}

QPatternist::Item

ExternalSourceLoader::evaluateSingleton(const QXmlName name,

                                        const QPatternist::DynamicContext::Ptr &context)

{

    Q_ASSERT(!name.isNull());

    const VariableValue variable(m_variableMap.value(Global::namePool()->stringForLocalName(name.localName())));

    if(variable.second == Document)

    {

        Q_ASSERT_X(QFile::exists(variable.first.toLocalFile()), Q_FUNC_INFO,

                   qPrintable(QString::fromLatin1("The file %1 doesn't exist").arg(variable.first.toLocalFile())));

        Q_ASSERT_X(m_resourceLoader->openDocument(variable.first, context), Q_FUNC_INFO,

                   "We're supposed to have the value. If not, an error should have been issued at query compile time.");

        return m_resourceLoader->openDocument(variable.first, context);

    }

    else if(variable.second == Query)

    {

        /* Well, here we open the file and execute it. */

        m_query.setQuery(QUrl::fromLocalFile(variable.first.toLocalFile()));

        Q_ASSERT(m_query.isValid());

        QXmlResultItems result;

        m_query.evaluateTo(&result);

        return QPatternist::Item::fromPublic(result.next());

    }

    else

    {

        Q_ASSERT(variable.second == URI);

        return QPatternist::AtomicString::fromValue(variable.first.toString());

    }

}

// vim: et:ts=4:sw=4:sts=4