154 lines
4.5 KiB
C++
154 lines
4.5 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
|
|
/*************************************************************************
|
|
*
|
|
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
*
|
|
* Copyright 2000, 2010 Oracle and/or its affiliates.
|
|
*
|
|
* OpenOffice.org - a multi-platform office productivity suite
|
|
*
|
|
* This file is part of OpenOffice.org.
|
|
*
|
|
* OpenOffice.org is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License version 3
|
|
* only, as published by the Free Software Foundation.
|
|
*
|
|
* OpenOffice.org 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 Lesser General Public License version 3 for more details
|
|
* (a copy is included in the LICENSE file that accompanied this code).
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* version 3 along with OpenOffice.org. If not, see
|
|
* <http://www.openoffice.org/license.html>
|
|
* for a copy of the LGPLv3 License.
|
|
*
|
|
************************************************************************/
|
|
|
|
#ifndef CONNECTIVITY_ROWFUNCTIONPARSER_HXX_INCLUDED
|
|
#define CONNECTIVITY_ROWFUNCTIONPARSER_HXX_INCLUDED
|
|
|
|
#include <sal/config.h>
|
|
#include <boost/shared_ptr.hpp>
|
|
#include "FDatabaseMetaDataResultSet.hxx"
|
|
#include <vector>
|
|
#include "connectivity/dbtoolsdllapi.hxx"
|
|
|
|
// -------------------------------------------------------------------------
|
|
namespace connectivity
|
|
{
|
|
// -------------------------------------------------------------------------
|
|
struct OOO_DLLPUBLIC_DBTOOLS RowEquation
|
|
{
|
|
sal_Int32 nOperation;
|
|
ORowSetValueDecoratorRef nPara[ 3 ];
|
|
|
|
RowEquation() :
|
|
nOperation ( 0 )
|
|
{
|
|
}
|
|
};
|
|
|
|
enum ExpressionFunct
|
|
{
|
|
FUNC_CONST,
|
|
|
|
ENUM_FUNC_EQUATION,
|
|
|
|
UNARY_FUNC_COLUMN,
|
|
ENUM_FUNC_AND,
|
|
ENUM_FUNC_OR
|
|
};
|
|
|
|
#define EXPRESSION_FLAG_SUMANGLE_MODE 1
|
|
|
|
class OOO_DLLPUBLIC_DBTOOLS SAL_NO_VTABLE ExpressionNode
|
|
{
|
|
public:
|
|
virtual ~ExpressionNode(){}
|
|
|
|
/** Operator to calculate function value.
|
|
|
|
This method calculates the function value.
|
|
*/
|
|
virtual ORowSetValueDecoratorRef evaluate(const ODatabaseMetaDataResultSet::ORow& _aRow ) const = 0;
|
|
|
|
virtual void fill(const ODatabaseMetaDataResultSet::ORow& _aRow ) const = 0;
|
|
|
|
/** Operator to retrieve the type of expression node
|
|
*/
|
|
virtual ExpressionFunct getType() const = 0;
|
|
|
|
/** Operator to retrieve the ms version of expression
|
|
*/
|
|
virtual ODatabaseMetaDataResultSet::ORow fillNode(
|
|
std::vector< RowEquation >& rEquations, ExpressionNode* pOptionalArg, sal_uInt32 nFlags ) = 0;
|
|
};
|
|
typedef ::boost::shared_ptr< ExpressionNode > ExpressionNodeSharedPtr;
|
|
|
|
/** This exception is thrown, when the arithmetic expression
|
|
parser failed to parse a string.
|
|
*/
|
|
struct OOO_DLLPUBLIC_DBTOOLS ParseError
|
|
{
|
|
ParseError() {}
|
|
ParseError( const char* ) {}
|
|
};
|
|
|
|
class OOO_DLLPUBLIC_DBTOOLS FunctionParser
|
|
{
|
|
public:
|
|
|
|
/** Parse a string
|
|
|
|
The following grammar is accepted by this method:
|
|
<code>
|
|
|
|
number_digit = '0'|'1'|'2'|'3'|'4'|'5'|'6'|'7'|'8'|'9'
|
|
|
|
number = number number_digit | number_digit
|
|
|
|
equal_function = '='
|
|
ternary_function = 'if'
|
|
|
|
string_reference = 'a-z,A-Z,0-9' ' '
|
|
modifier_reference = '$' '0-9' ' '
|
|
|
|
basic_expression =
|
|
number |
|
|
string_reference |
|
|
additive_expression equal_function additive_expression |
|
|
unary_function '(' number_digit ')'
|
|
ternary_function '(' additive_expression ',' additive_expression ',
|
|
' additive_expression ')' | '(' additive_expression ')'
|
|
|
|
</code>
|
|
|
|
@param rFunction
|
|
The string to parse
|
|
|
|
@throws ParseError if an invalid expression is given.
|
|
|
|
@return the generated function object.
|
|
*/
|
|
|
|
static ExpressionNodeSharedPtr parseFunction( const ::rtl::OUString& _sFunction);
|
|
|
|
private:
|
|
// disabled constructor/destructor, since this is
|
|
// supposed to be a singleton
|
|
FunctionParser();
|
|
|
|
// default: disabled copy/assignment
|
|
FunctionParser(const FunctionParser&);
|
|
FunctionParser& operator=( const FunctionParser& );
|
|
};
|
|
|
|
// -------------------------------------------------------------------------
|
|
} // namespace connectivity
|
|
// -------------------------------------------------------------------------
|
|
#endif /* CONNECTIVITY_ROWFUNCTIONPARSER_HXX_INCLUDED */
|
|
|
|
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|