KDbQueryParameterExpression.cpp

/* This file is part of the KDE project
   Copyright (C) 2003-2011 Jarosław Staniek <staniek@kde.org>
 
   Based on nexp.cpp : Parser module of Python-like language
   (C) 2001 Jarosław Staniek, MIMUW (www.mimuw.edu.pl)
 
   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.
 
   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.
 
   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */
 
#include "KDbExpression.h"
#include "KDb.h"
#include "KDbQuerySchema.h"
#include "KDbQuerySchemaParameter.h"
#include "KDbDriver.h"
#include "kdb_debug.h"
#include "generated/sqlparser.h"
 
KDbQueryParameterExpressionData::KDbQueryParameterExpressionData()
 : KDbConstExpressionData()
 , m_type(KDbField::InvalidType)
{
    ExpressionDebug << "QueryParameterExpressionData" << ref;
}
 
KDbQueryParameterExpressionData::KDbQueryParameterExpressionData(
    KDbField::Type type, const QVariant& value)
 : KDbConstExpressionData(value)
 , m_type(type)
{
   ExpressionDebug << "QueryParameterExpressionData" << ref;
}
 
KDbQueryParameterExpressionData::~KDbQueryParameterExpressionData()
{
    ExpressionDebug << "~QueryParameterExpressionData" << ref;
}
 
KDbQueryParameterExpressionData* KDbQueryParameterExpressionData::clone()
{
    ExpressionDebug << "QueryParameterExpressionData::clone" << *this;
    return new KDbQueryParameterExpressionData(*this);
}
 
void KDbQueryParameterExpressionData::debugInternal(QDebug dbg, KDb::ExpressionCallStack* callStack) const
{
    Q_UNUSED(callStack);
    dbg.nospace() << qPrintable(QString::fromLatin1("QueryParExp([%1],type=%2)")
        .arg(value.toString(), KDbDriver::defaultSqlTypeName(type())));
}
 
KDbEscapedString KDbQueryParameterExpressionData::toStringInternal(
                                        const KDbDriver *driver,
                                        KDbQuerySchemaParameterValueListIterator* params,
                                        KDb::ExpressionCallStack* callStack) const
{
    Q_UNUSED(callStack);
    return params
           // Enclose in () because for example if the parameter is -1 and parent expression
           // unary '-' then the result would be "--1" (a comment in SQL!).
           // With the () the result will be a valid expression "-(-1)".
           ? KDbEscapedString("(%1)").arg(driver->valueToSql(type(), params->previousValue()))
           : KDbEscapedString("[%1]").arg(KDbEscapedString(value.toString()));
}
 
void KDbQueryParameterExpressionData::getQueryParameters(QList<KDbQuerySchemaParameter>* params)
{
    Q_ASSERT(params);
    KDbQuerySchemaParameter param;
    param.setMessage(value.toString());
    param.setType(type());
    params->append(param);
}
 
bool KDbQueryParameterExpressionData::validateInternal(KDbParseInfo *parseInfo, KDb::ExpressionCallStack* callStack)
{
    Q_UNUSED(parseInfo);
    return typeInternal(callStack) != KDbField::InvalidType;
}
 
KDbField::Type KDbQueryParameterExpressionData::typeInternal(KDb::ExpressionCallStack* callStack) const
{
    Q_UNUSED(callStack);
    return m_type;
}
 
//=========================================
 
KDbQueryParameterExpression::KDbQueryParameterExpression()
 : KDbConstExpression(new KDbQueryParameterExpressionData)
{
    ExpressionDebug << "KDbQueryParameterExpression() ctor" << *this;
}
 
KDbQueryParameterExpression::KDbQueryParameterExpression(const QString& message)
        : KDbConstExpression(new KDbQueryParameterExpressionData(KDbField::Text, message),
              KDb::QueryParameterExpression, KDbToken::QUERY_PARAMETER)
{
}
 
KDbQueryParameterExpression::KDbQueryParameterExpression(const KDbQueryParameterExpression& expr)
        : KDbConstExpression(expr)
{
}
 
KDbQueryParameterExpression::KDbQueryParameterExpression(KDbExpressionData* data)
    : KDbConstExpression(data)
{
    ExpressionDebug << "KDbQueryParameterExpression ctor (KDbExpressionData*)" << *this;
}
 
KDbQueryParameterExpression::KDbQueryParameterExpression(const ExplicitlySharedExpressionDataPointer &ptr)
    : KDbConstExpression(ptr)
{
}
 
KDbQueryParameterExpression::~KDbQueryParameterExpression()
{
}
 
void KDbQueryParameterExpression::setType(KDbField::Type type)
{
    d->convert<KDbQueryParameterExpressionData>()->m_type = type;
}