/usr/include/KDb3/KDbExpressionData.h is in libkdb3-dev 3.1.0-2.
This file is owned by root:root, with mode 0o644.
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Copyright (C) 2003-2015 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.
*/
#ifndef KDB_EXPRESSION_P_H
#define KDB_EXPRESSION_P_H
#include "config-kdb.h"
#include "KDbToken.h"
#include "KDbField.h"
class KDbConstExpressionData;
class KDbEscapedString;
class KDbExpressionData;
class KDbParseInfo;
class KDbQueryParameterExpressionData;
class KDbQuerySchemaParameter;
class KDbQuerySchemaParameterValueListIterator;
class KDbUnaryExpressionData;
namespace KDb
{
typedef QList<const KDbExpressionData*> ExpressionCallStack;
//! Classes of expressions
enum ExpressionClass {
UnknownExpression,
UnaryExpression,
ArithmeticExpression,
LogicalExpression,
RelationalExpression,
SpecialBinaryExpression,
ConstExpression,
VariableExpression,
FunctionExpression,
AggregationExpression,
FieldListExpression,
TableListExpression,
ArgumentListExpression,
QueryParameterExpression,
LastExpressionClass = QueryParameterExpression //!< This line should be at the end of the list
};
}
typedef QExplicitlySharedDataPointer<KDbExpressionData> ExplicitlySharedExpressionDataPointer;
//! Internal data class used to implement implicitly shared class KDbExpression.
//! Provides thread-safe reference counting.
class KDB_TESTING_EXPORT KDbExpressionData : public QSharedData
{
public:
KDbExpressionData();
/*Data(const Data& other)
: QSharedData(other)
, token(other.token)
, expressionClass(other.expressionClass)
, parent(other.parent)
, children(other.children)
{
kdbDebug() << "KDbExpressionData" << ref;
}*/
virtual ~KDbExpressionData();
//! @see KDbExpression::token()
KDbToken token;
//! @see KDbExpression::expressionClass()
KDb::ExpressionClass expressionClass;
ExplicitlySharedExpressionDataPointer parent;
QList<ExplicitlySharedExpressionDataPointer> children;
KDbField::Type type() const; //!< @return type of this expression;
bool isValid() const;
bool isTextType() const;
bool isIntegerType() const;
bool isNumericType() const;
bool isFPNumericType() const;
bool isDateTimeType() const;
KDbEscapedString toString(const KDbDriver *driver,
KDbQuerySchemaParameterValueListIterator *params = nullptr,
KDb::ExpressionCallStack *callStack = nullptr) const;
virtual void getQueryParameters(QList<KDbQuerySchemaParameter> *params);
bool validate(KDbParseInfo *parseInfo);
virtual KDbExpressionData* clone();
template <typename T>
const T* convertConst() const { return dynamic_cast<const T*>(this); }
template <typename T>
T* convert() { return dynamic_cast<T*>(this); }
//! Sends information about this expression to debug output @a dbg.
QDebug debug(QDebug dbg, KDb::ExpressionCallStack *callStack) const;
KDbField::Type type(KDb::ExpressionCallStack *callStack) const;
bool validate(KDbParseInfo *parseInfo, KDb::ExpressionCallStack *callStack);
protected:
//! Sends information about this expression to debug output @a dbg (internal).
virtual void debugInternal(QDebug dbg, KDb::ExpressionCallStack *callStack) const;
virtual KDbField::Type typeInternal(KDb::ExpressionCallStack *callStack) const;
virtual KDbEscapedString toStringInternal(const KDbDriver *driver,
KDbQuerySchemaParameterValueListIterator *params,
KDb::ExpressionCallStack *callStack) const;
virtual bool validateInternal(KDbParseInfo *parseInfo, KDb::ExpressionCallStack *callStack);
bool addToCallStack(QDebug *dbg, KDb::ExpressionCallStack *callStack) const;
};
//! Internal data class used to implement implicitly shared class KDbNArgExpression.
//! Provides thread-safe reference counting.
class KDbNArgExpressionData : public KDbExpressionData
{
Q_DECLARE_TR_FUNCTIONS(KDbNArgExpressionData)
public:
KDbNArgExpressionData();
~KDbNArgExpressionData() override;
void getQueryParameters(QList<KDbQuerySchemaParameter> *params) override;
KDbNArgExpressionData* clone() override;
bool containsInvalidArgument() const;
bool containsNullArgument() const;
protected:
//! Sends information about this expression to debug output @a dbg (internal).
void debugInternal(QDebug dbg, KDb::ExpressionCallStack *callStack) const override;
KDbField::Type typeInternal(KDb::ExpressionCallStack *callStack) const override;
KDbEscapedString toStringInternal(const KDbDriver *driver,
KDbQuerySchemaParameterValueListIterator *params,
KDb::ExpressionCallStack *callStack) const override;
bool validateInternal(KDbParseInfo *parseInfo, KDb::ExpressionCallStack *callStack) override;
};
//! Internal data class used to implement implicitly shared class KDbUnaryExpression.
//! Provides thread-safe reference counting.
class KDbUnaryExpressionData : public KDbExpressionData
{
public:
KDbUnaryExpressionData();
~KDbUnaryExpressionData() override;
void getQueryParameters(QList<KDbQuerySchemaParameter> *params) override;
KDbUnaryExpressionData* clone() override;
inline ExplicitlySharedExpressionDataPointer arg() const {
return children.isEmpty() ? ExplicitlySharedExpressionDataPointer() : children.first();
}
protected:
//! Sends information about this expression to debug output @a dbg (internal).
void debugInternal(QDebug dbg, KDb::ExpressionCallStack *callStack) const override;
KDbEscapedString toStringInternal(const KDbDriver *driver,
KDbQuerySchemaParameterValueListIterator *params,
KDb::ExpressionCallStack *callStack) const override;
KDbField::Type typeInternal(KDb::ExpressionCallStack *callStack) const override;
bool validateInternal(KDbParseInfo *parseInfo, KDb::ExpressionCallStack *callStack) override;
};
//! Internal data class used to implement implicitly shared class KDbBinaryExpression.
//! Provides thread-safe reference counting.
class KDbBinaryExpressionData : public KDbExpressionData
{
Q_DECLARE_TR_FUNCTIONS(KDbBinaryExpressionData)
public:
KDbBinaryExpressionData();
~KDbBinaryExpressionData() override;
void getQueryParameters(QList<KDbQuerySchemaParameter> *params) override;
KDbBinaryExpressionData *clone() override;
ExplicitlySharedExpressionDataPointer left() const;
ExplicitlySharedExpressionDataPointer right() const;
protected:
void setLeft(const KDbExpressionData& left);
//! Sends information about this expression to debug output @a dbg (internal).
void debugInternal(QDebug dbg, KDb::ExpressionCallStack *callStack) const override;
KDbEscapedString toStringInternal(const KDbDriver *driver,
KDbQuerySchemaParameterValueListIterator *params,
KDb::ExpressionCallStack *callStack) const override;
KDbField::Type typeInternal(KDb::ExpressionCallStack *callStack) const override;
bool validateInternal(KDbParseInfo *parseInfo, KDb::ExpressionCallStack *callStack) override;
};
//! Internal data class used to implement implicitly shared class KDbConstExpression.
//! Provides thread-safe reference counting.
class KDbConstExpressionData : public KDbExpressionData
{
public:
explicit KDbConstExpressionData(const QVariant& aValue = QVariant());
~KDbConstExpressionData() override;
QVariant value;
void getQueryParameters(QList<KDbQuerySchemaParameter> *params) override;
KDbConstExpressionData *clone() override;
protected:
//! Sends information about this expression to debug output @a dbg (internal).
void debugInternal(QDebug dbg, KDb::ExpressionCallStack *callStack) const override;
KDbEscapedString toStringInternal(const KDbDriver *driver,
KDbQuerySchemaParameterValueListIterator *params,
KDb::ExpressionCallStack *callStack) const override;
KDbField::Type typeInternal(KDb::ExpressionCallStack *callStack) const override;
bool validateInternal(KDbParseInfo *parseInfo, KDb::ExpressionCallStack *callStack) override;
};
//! Internal data class used to implement implicitly shared class KDbQueryParameterExpression.
//! Provides thread-safe reference counting.
class KDbQueryParameterExpressionData : public KDbConstExpressionData
{
public:
KDbQueryParameterExpressionData();
KDbQueryParameterExpressionData(KDbField::Type type, const QVariant& value);
~KDbQueryParameterExpressionData() override;
KDbField::Type m_type;
void getQueryParameters(QList<KDbQuerySchemaParameter> *params) override;
KDbQueryParameterExpressionData* clone() override;
protected:
//! Sends information about this expression to debug output @a dbg (internal).
void debugInternal(QDebug dbg, KDb::ExpressionCallStack *callStack) const override;
KDbEscapedString toStringInternal(const KDbDriver *driver,
KDbQuerySchemaParameterValueListIterator *params,
KDb::ExpressionCallStack *callStack) const override;
KDbField::Type typeInternal(KDb::ExpressionCallStack *callStack) const override;
bool validateInternal(KDbParseInfo *parseInfo, KDb::ExpressionCallStack *callStack) override;
};
//! Internal data class used to implement implicitly shared class KDbVariableExpression.
//! Provides thread-safe reference counting.
class KDbVariableExpressionData : public KDbExpressionData
{
Q_DECLARE_TR_FUNCTIONS(KDbVariableExpressionData)
public:
KDbVariableExpressionData();
explicit KDbVariableExpressionData(const QString& aName);
~KDbVariableExpressionData() override;
/*! Verbatim name as returned by scanner. */
QString name;
/*! 0 by default. After successful validate() it will point to a field,
if the variable is of a form "tablename.fieldname" or "fieldname",
otherwise (eg. for asterisks) still 0.
Only meaningful for column expressions within a query. */
KDbField *field;
/*! -1 by default. After successful validate() it will contain a position of a table
within query that needs to be bound to the field.
This value can be either be -1 if no binding is needed.
This value is used in the Parser to call
KDbQuerySchema::addField(KDbField* field, int bindToTable);
Only meaningful for column expressions within a query. */
int tablePositionForField;
/*! 0 by default. After successful validate() it will point to a table
that is referenced by asterisk, i.e. "*.tablename".
This is set to @c nullptr if this variable is not an asterisk of that form. */
KDbTableSchema *tableForQueryAsterisk;
void getQueryParameters(QList<KDbQuerySchemaParameter> *params) override;
KDbVariableExpressionData* clone() override;
protected:
//! Sends information about this expression to debug output @a dbg (internal).
void debugInternal(QDebug dbg, KDb::ExpressionCallStack *callStack) const override;
KDbEscapedString toStringInternal(const KDbDriver *driver,
KDbQuerySchemaParameterValueListIterator *params,
KDb::ExpressionCallStack *callStack) const override;
KDbField::Type typeInternal(KDb::ExpressionCallStack *callStack) const override;
/*! Validation. Sets field, tablePositionForField
and tableForQueryAsterisk members.
See addColumn() in parse.y to see how it's used on column adding. */
bool validateInternal(KDbParseInfo *parseInfo, KDb::ExpressionCallStack *callStack) override;
};
//! Internal data class used to implement implicitly shared class KDbFunctionExpression.
//! Provides thread-safe reference counting.
class KDbFunctionExpressionData : public KDbExpressionData
{
Q_DECLARE_TR_FUNCTIONS(KDbFunctionExpressionData)
public:
KDbFunctionExpressionData();
explicit KDbFunctionExpressionData(const QString &aName,
ExplicitlySharedExpressionDataPointer arguments
= ExplicitlySharedExpressionDataPointer());
~KDbFunctionExpressionData() override;
QString name;
ExplicitlySharedExpressionDataPointer args;
void getQueryParameters(QList<KDbQuerySchemaParameter> *params) override;
KDbFunctionExpressionData* clone() override;
void setArguments(ExplicitlySharedExpressionDataPointer arguments);
static KDbEscapedString toString(const QString &name,
const KDbDriver *driver,
const KDbNArgExpressionData *args,
KDbQuerySchemaParameterValueListIterator *params,
KDb::ExpressionCallStack *callStack);
protected:
//! Sends information about this expression to debug output @a dbg (internal).
void debugInternal(QDebug dbg, KDb::ExpressionCallStack *callStack) const override;
KDbEscapedString toStringInternal(const KDbDriver *driver,
KDbQuerySchemaParameterValueListIterator *params,
KDb::ExpressionCallStack *callStack) const override;
KDbField::Type typeInternal(KDb::ExpressionCallStack *callStack) const override;
/*! Validation. Sets field, tablePositionForField
and tableForQueryAsterisk members.
See addColumn() in parse.y to see how it's used on column adding. */
bool validateInternal(KDbParseInfo *parseInfo, KDb::ExpressionCallStack *callStack) override;
};
QDebug operator<<(QDebug dbg, const KDbExpressionData& expr);
#endif
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