File indexing completed on 2024-04-14 14:53:09

 /* This file is part of the KDE project
    Copyright (C) 2003-2018 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 "KDbDriver.h"
 #include "kdb_debug.h"
 #include "generated/sqlparser.h"
 
 #include <QPoint>
 
 KDbConstExpressionData::KDbConstExpressionData(const QVariant& aValue)
  : KDbExpressionData()
  , value(aValue)
 {
     ExpressionDebug << "ConstExpressionData" << ref;
 }
 
 KDbConstExpressionData::~KDbConstExpressionData()
 {
     ExpressionDebug << "~ConstExpressionData" << ref;
 }
 
 KDbConstExpressionData* KDbConstExpressionData::clone()
 {
     ExpressionDebug << "ConstExpressionData::clone" << *this;
     return new KDbConstExpressionData(*this);
 }
 
 KDbField::Type KDbConstExpressionData::typeInternal(KDb::ExpressionCallStack* callStack) const
 {
     Q_UNUSED(callStack);
     switch (token.value()) {
     case SQL_NULL:
         return KDbField::Null;
     case INTEGER_CONST:
 //! @todo ok?
 //! @todo add sign info?
         if (value.type() == QVariant::Int || value.type() == QVariant::UInt) {
             qint64 v = value.toInt();
             if (v <= 0xff && v > -0x80)
                 return KDbField::Byte;
             if (v <= 0xffff && v > -0x8000)
                 return KDbField::ShortInteger;
             return KDbField::Integer;
         }
         return KDbField::BigInteger;
     case CHARACTER_STRING_LITERAL:
         if (KDbField::defaultMaxLength() > 0
             && value.toString().length() > KDbField::defaultMaxLength())
         {
             return KDbField::LongText;
         }
         else {
             return KDbField::Text;
         }
     case SQL_TRUE:
     case SQL_FALSE:
         return KDbField::Boolean;
     case REAL_CONST:
         return KDbField::Double;
     case DATE_CONST:
         if (value.canConvert<KDbDate>() && value.value<KDbDate>().isValid()) {
             return KDbField::Date;
         } else if (value.canConvert<QDate>() && value.toDate().isValid()) {
             return KDbField::Date;
         }
         break;
     case DATETIME_CONST:
         if (value.canConvert<KDbDateTime>() && value.value<KDbDateTime>().isValid()) {
             return KDbField::DateTime;
         } else if (value.canConvert<QDateTime>() && value.toDateTime().isValid()) {
             return KDbField::DateTime;
         }
         break;
     case TIME_CONST:
         if (value.canConvert<KDbTime>() && value.value<KDbTime>().isValid()) {
             return KDbField::Time;
         } else if (value.canConvert<QTime>() && value.toTime().isValid()) {
             return KDbField::Time;
         }
         break;
     }
     return KDbField::InvalidType;
 }
 
 void KDbConstExpressionData::debugInternal(QDebug dbg, KDb::ExpressionCallStack* callStack) const
 {
     Q_UNUSED(callStack);
     QString res = QLatin1String("ConstExp(")
         + token.name()
         + QLatin1String(",") + toString(nullptr).toString()
         + QString::fromLatin1(",type=%1").arg(KDbDriver::defaultSqlTypeName(type()));
     if (value.type() == QVariant::Point && token.value() == REAL_CONST) {
         res += QLatin1String(",DECIMAL");
     }
     res += QLatin1String(")");
     dbg.nospace() << qPrintable(res);
 }
 
 KDbEscapedString KDbConstExpressionData::toStringInternal(
                                         const KDbDriver *driver,
                                         KDbQuerySchemaParameterValueListIterator* params,
                                         KDb::ExpressionCallStack* callStack) const
 {
     Q_UNUSED(params);
     Q_UNUSED(callStack);
     switch (token.value()) {
     case SQL_NULL:
         return KDb::valueToSql(driver, KDbField::Null, QVariant());
     case CHARACTER_STRING_LITERAL:
 //! @todo better escaping!
         return KDb::valueToSql(driver, KDbField::Text, value);
     case SQL_TRUE:
         return KDb::valueToSql(driver, KDbField::Boolean, 1);
     case SQL_FALSE:
         return KDb::valueToSql(driver, KDbField::Boolean, 0);
     case REAL_CONST:
         return KDbEscapedString(value.toByteArray());
     case DATE_CONST:
         return KDb::valueToSql(driver, KDbField::Date, value);
     case DATETIME_CONST:
         return KDb::valueToSql(driver, KDbField::Date, value);
     case TIME_CONST:
         return KDb::valueToSql(driver, KDbField::Time, value);
     case INTEGER_CONST:
     default:
         break;
     }
     return KDbEscapedString(value.toByteArray());
 }
 
 void KDbConstExpressionData::getQueryParameters(QList<KDbQuerySchemaParameter>* params)
 {
     Q_UNUSED(params);
 }
 
 bool KDbConstExpressionData::validateInternal(KDbParseInfo *parseInfo, KDb::ExpressionCallStack* callStack)
 {
     Q_UNUSED(parseInfo);
     return typeInternal(callStack) != KDbField::InvalidType;
 }
 
 //=========================================
 
 KDbConstExpression::KDbConstExpression()
  : KDbExpression(new KDbConstExpressionData(QVariant()))
 {
     ExpressionDebug << "KDbConstExpression() ctor" << *this;
 }
 
 KDbConstExpression::KDbConstExpression(KDbToken token, const QVariant& value)
         : KDbExpression(new KDbConstExpressionData(value), KDb::ConstExpression, token)
 {
 }
 
 KDbConstExpression::KDbConstExpression(KDbExpressionData* data, KDb::ExpressionClass aClass,
                                        KDbToken token)
         : KDbExpression(data, aClass, token)
 {
 }
 
 KDbConstExpression::KDbConstExpression(KDbExpressionData* data)
     : KDbExpression(data)
 {
 }
 
 KDbConstExpression::KDbConstExpression(const ExplicitlySharedExpressionDataPointer &ptr)
     : KDbExpression(ptr)
 {
 }
 
 KDbConstExpression::KDbConstExpression(const KDbConstExpression& expr)
         : KDbExpression(expr)
 {
 }
 
 KDbConstExpression::~KDbConstExpression()
 {
 }
 
 QVariant KDbConstExpression::value() const
 {
     return d->convert<const KDbConstExpressionData>()->value;
 }
 
 void KDbConstExpression::setValue(const QVariant& value)
 {
     d->convert<KDbConstExpressionData>()->value = value;
 }