File indexing completed on 2024-12-01 10:28:56

 /* This file is part of the KDE project
    Copyright (C) 2003-2016 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 "KDbDriver.h"
 #include "KDbQuerySchema.h"
 #include "KDbParser_p.h"
 #include "kdb_debug.h"
 
 KDbNArgExpressionData::KDbNArgExpressionData()
  : KDbExpressionData()
 {
     ExpressionDebug << "NArgExpressionData" << ref;
 }
 
 KDbNArgExpressionData::~KDbNArgExpressionData()
 {
     ExpressionDebug << "~NArgExpressionData" << ref;
 }
 
 KDbField::Type KDbNArgExpressionData::typeInternal(KDb::ExpressionCallStack *callStack) const
 {
     if (token == KDbToken::BETWEEN_AND || token == KDbToken::NOT_BETWEEN_AND) {
         for (int i = 0; i < children.count(); i++) {
             KDbField::Type t = children.at(0)->type(callStack);
             if (t == KDbField::InvalidType || t == KDbField::Null) {
                 return t;
             }
         }
         return KDbField::Boolean;
     }
     return KDbField::Tuple;
 }
 
 KDbNArgExpressionData* KDbNArgExpressionData::clone()
 {
     ExpressionDebug << "NArgExpressionData::clone" << *this;
     return new KDbNArgExpressionData(*this);
 }
 
 bool KDbNArgExpressionData::validateInternal(KDbParseInfo *parseInfo, KDb::ExpressionCallStack* callStack)
 {
     foreach(ExplicitlySharedExpressionDataPointer data, children) {
         if (!data->validate(parseInfo, callStack))
             return false;
     }
 
     if (token == KDbToken::BETWEEN_AND || token == KDbToken::NOT_BETWEEN_AND) {
         if (children.count() != 3) {
             parseInfo->setErrorMessage(tr("Three arguments required"));
             parseInfo->setErrorDescription(
                 tr("%1 operator requires exactly three arguments.", "BETWEEN..AND error")
                                   .arg(QLatin1String("BETWEEN...AND")));
             return false;
         }
         const KDbField::Type t0 = children[0]->type();
         const KDbField::Type t1 = children[1]->type();
         const KDbField::Type t2 = children[2]->type();
         if (t0 == KDbField::Null || t1 == KDbField::Null || t2 == KDbField::Null) {
             return true;
         }
         if (!(   !KDbField::isNumericType(t0)
               || !KDbField::isNumericType(t1)
               || !KDbField::isNumericType(t2)))
         {
             return true;
         } else if (!(   !KDbField::isTextType(t0)
                      || !KDbField::isTextType(t1)
                      || !KDbField::isTextType(t2)))
         {
             return true;
         }
 
         if (t0 == t1 && t1 == t2) {
             return true;
         }
 
         parseInfo->setErrorMessage(tr("Incompatible types of arguments"));
         parseInfo->setErrorDescription(
                            tr("Operator \"%1\" requires compatible types of arguments. "
                               "Specified arguments are of type %2, %3, %4.",
                               "BETWEEN..AND arguments type error")
                               .arg(QLatin1String("BETWEEN..AND"),
                                    KDbField::typeName(t0),
                                    KDbField::typeName(t1),
                                    KDbField::typeName(t2)));
         return false;
     }
     return true;
 }
 
 void KDbNArgExpressionData::debugInternal(QDebug dbg, KDb::ExpressionCallStack* callStack) const
 {
     dbg.nospace() << "NArgExp("
         << token.name() << ", class=" << expressionClassName(expressionClass);
     foreach(ExplicitlySharedExpressionDataPointer data, children) {
         dbg.nospace() << ", ";
         data->debug(dbg, callStack);
     }
     dbg.nospace() << ",type=" << KDbDriver::defaultSqlTypeName(type()) << ")";
 }
 
 KDbEscapedString KDbNArgExpressionData::toStringInternal(
                                         const KDbDriver *driver,
                                         KDbQuerySchemaParameterValueListIterator* params,
                                         KDb::ExpressionCallStack* callStack) const
 {
     if (token == KDbToken::BETWEEN_AND && children.count() == 3) {
         return children[0]->toString(driver, params, callStack) + " BETWEEN "
                 + children[1]->toString(driver, params, callStack) + " AND "
                 + children[2]->toString(driver, params, callStack);
     }
     if (token == KDbToken::NOT_BETWEEN_AND && children.count() == 3) {
         return children[0]->toString(driver, params, callStack) + " NOT BETWEEN "
                 + children[1]->toString(driver, params, callStack) + " AND "
                 + children[2]->toString(driver, params, callStack);
     }
 
     KDbEscapedString s;
     s.reserve(256);
     foreach(ExplicitlySharedExpressionDataPointer data, children) {
         if (!s.isEmpty())
             s += ", ";
         s += data->toString(driver, params, callStack);
     }
     return s;
 }
 
 void KDbNArgExpressionData::getQueryParameters(QList<KDbQuerySchemaParameter>* params)
 {
     Q_ASSERT(params);
     foreach(ExplicitlySharedExpressionDataPointer data, children) {
         data->getQueryParameters(params);
     }
 }
 
 bool KDbNArgExpressionData::containsInvalidArgument() const
 {
     foreach(ExplicitlySharedExpressionDataPointer data, children) {
         const KDbField::Type type = data->type();
         if (type == KDbField::InvalidType) {
             return true;
         }
     }
     return false;
 }
 
 bool KDbNArgExpressionData::containsNullArgument() const
 {
     foreach(ExplicitlySharedExpressionDataPointer data, children) {
         const KDbField::Type type = data->type();
         if (type == KDbField::Null) {
             return true;
         }
     }
     return false;
 }
 
 //=========================================
 
 KDbNArgExpression::KDbNArgExpression()
  : KDbExpression(new KDbNArgExpressionData)
 {
     ExpressionDebug << "KDbNArgExpression() ctor" << *this;
 }
 
 KDbNArgExpression::KDbNArgExpression(KDbExpressionData* data)
  : KDbExpression(data)
 {
     ExpressionDebug << "KDbNArgExpression(KDbExpressionData*) ctor" << *this;
 }
 
 KDbNArgExpression::KDbNArgExpression(KDb::ExpressionClass aClass, KDbToken token)
         : KDbExpression(new KDbNArgExpressionData, aClass, token)
 {
     ExpressionDebug << "KDbNArgExpression(KDb::ExpressionClass, int) ctor" << *this;
 }
 
 KDbNArgExpression::KDbNArgExpression(const KDbNArgExpression& expr)
         : KDbExpression(expr)
 {
 }
 
 KDbNArgExpression::KDbNArgExpression(const ExplicitlySharedExpressionDataPointer &ptr)
     : KDbExpression(ptr)
 {
 }
 
 KDbNArgExpression::~KDbNArgExpression()
 {
 }
 
 void KDbNArgExpression::append(const KDbExpression& expr)
 {
     appendChild(expr);
 }
 
 void KDbNArgExpression::prepend(const KDbExpression& expr)
 {
     prependChild(expr);
 }
 
 KDbExpression KDbNArgExpression::arg(int i) const
 {
     return KDbExpression(d->children.value(i));
 }
 
 void KDbNArgExpression::insert(int i, const KDbExpression& expr)
 {
     insertChild(i, expr);
 }
 
 void KDbNArgExpression::replace(int i, const KDbExpression& expr)
 {
     if (!checkBeforeInsert(expr.d))
         return;
     if (i < 0 || i > d->children.count())
         return;
     d->children.at(i)->parent.reset();
     d->children.replace(i, expr.d);
     expr.d->parent = d;
 }
 
 bool KDbNArgExpression::remove(const KDbExpression& expr)
 {
     return removeChild(expr);
 }
 
 void KDbNArgExpression::removeAt(int i)
 {
     removeChild(i);
 }
 
 KDbExpression KDbNArgExpression::takeAt(int i)
 {
     return takeChild(i);
 }
 
 int KDbNArgExpression::indexOf(const KDbExpression& expr, int from) const
 {
     return indexOfChild(expr, from);
 }
 
 int KDbNArgExpression::lastIndexOf(const KDbExpression& expr, int from) const
 {
     return lastIndexOfChild(expr, from);
 }
 
 int KDbNArgExpression::argCount() const
 {
     return d->children.count();
 }
 
 bool KDbNArgExpression::isEmpty() const
 {
     return d->children.isEmpty();
 }
 
 bool KDbNArgExpression::containsInvalidArgument() const
 {
     return d->convert<KDbNArgExpressionData>()->containsInvalidArgument();
 }
 
 bool KDbNArgExpression::containsNullArgument() const
 {
     return d->convert<KDbNArgExpressionData>()->containsNullArgument();
 }