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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2008 by Sun Microsystems, Inc.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: RowFunctionParser.hxx,v $
* $Revision: 1.3 $
*
* 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>
#ifndef BOOST_SHARED_PTR_HPP_INCLUDED
#include <boost/shared_ptr.hpp>
#endif
#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 */
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