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

**

** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

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

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

** Alternatively, this file may be used under the terms of the GNU Lesser

** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

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

#include "qcommonnamespaces_p.h"

#include "qcommonsequencetypes_p.h"

#include "qfunctionfactory_p.h"

#include "qgeneralcomparison_p.h"

#include "qliteral_p.h"

#include "qschemanumeric_p.h"

#include "qvaluecomparison_p.h"

#include "qoptimizerblocks_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

ByIDIdentifier::ByIDIdentifier(const Expression::ID id) : m_id(id)

{

}

bool ByIDIdentifier::matches(const Expression::Ptr &expr) const

{

    return expr->is(m_id);

}

ComparisonIdentifier::ComparisonIdentifier(const QVector<Expression::ID> hosts,

                                           const AtomicComparator::Operator op) : m_hosts(hosts),

                                                                                  m_op(op)

{

}

bool ComparisonIdentifier::matches(const Expression::Ptr &e) const

{

    const Expression::ID eID = e->id();

    if(eID == Expression::IDGeneralComparison)

    {

        if(m_hosts.contains(Expression::IDGeneralComparison))

            return e->as<GeneralComparison>()->operatorID() == m_op;

        else

            return false;

    }

    else if(eID == Expression::IDValueComparison)

    {

        if(m_hosts.contains(Expression::IDValueComparison))

            return e->as<ValueComparison>()->operatorID() == m_op;

        else

            return false;

    }

    else

        return false;

}

BySequenceTypeIdentifier::BySequenceTypeIdentifier(const SequenceType::Ptr &seqType) : m_seqType(seqType)

{

    Q_ASSERT(seqType);

}

bool BySequenceTypeIdentifier::matches(const Expression::Ptr &expr) const

{

    const SequenceType::Ptr t(expr->staticType());

    return m_seqType->itemType()->xdtTypeMatches(t->itemType())

           &&

           m_seqType->cardinality().isMatch(t->cardinality());

}

IntegerIdentifier::IntegerIdentifier(const xsInteger num) : m_num(num)

{

}

bool IntegerIdentifier::matches(const Expression::Ptr &expr) const

{

    return expr->is(Expression::IDIntegerValue) &&

           expr->as<Literal>()->item().as<Numeric>()->toInteger() == m_num;

}

BooleanIdentifier::BooleanIdentifier(const bool value) : m_value(value)

{

}

bool BooleanIdentifier::matches(const Expression::Ptr &expr) const

{

    return expr->is(Expression::IDBooleanValue) &&

           expr->evaluateEBV(DynamicContext::Ptr()) == m_value;

}

ByIDCreator::ByIDCreator(const Expression::ID id) : m_id(id)

{

    Q_ASSERT(id != Expression::IDIgnorableExpression);

}

Expression::Ptr ByIDCreator::create(const Expression::List &operands,

                                    const StaticContext::Ptr &context,

                                    const SourceLocationReflection *const r) const

{

    return create(m_id, operands, context, r);

}

Expression::Ptr ByIDCreator::create(const Expression::ID id,

                                    const Expression::List &operands,

                                    const StaticContext::Ptr &context,

                                    const SourceLocationReflection *const r)

{

    Q_ASSERT(context);

    QXmlName::LocalNameCode fnName;

    switch(id)

    {

        case Expression::IDExistsFN:

        {

            fnName = StandardLocalNames::exists;

            break;

        }

        case Expression::IDEmptyFN:

        {

            fnName = StandardLocalNames::empty;

            break;

        }

        default:

        {

            Q_ASSERT_X(false, Q_FUNC_INFO,

                       "Cannot create an expression of requested type; m_id is wrong.");

            return Expression::Ptr();

        }

    }

    /* The reason we don't simply do 'new ExistsFN()' ourselves, is that all FunctionCall

     * instances needs their FunctionSignature in order to function, and the FunctionFactories

     * sets that. */

    const QXmlName qName(StandardNamespaces::fn, fnName);

    const Expression::Ptr result(context->functionSignatures()->createFunctionCall(qName, operands, context, r));

    context->wrapExpressionWith(r, result);

    return result;

}

QT_END_NAMESPACE