102 lines
2.9 KiB
C
102 lines
2.9 KiB
C
|
/*
|
||
|
|
----
|
||
|
|
This file is part of SECONDO.
|
||
|
|
|
||
|
|
Copyright (C) 2004, University in Hagen, Department of Computer Science,
|
||
|
|
Database Systems for New Applications.
|
||
|
|
|
||
|
|
SECONDO is free software; you can redistribute it and/or modify
|
||
|
|
it under the terms of the GNU General Public License as published by
|
||
|
|
the Free Software Foundation; either version 2 of the License, or
|
||
|
|
(at your option) any later version.
|
||
|
|
|
||
|
|
SECONDO 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 General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU General Public License
|
||
|
|
along with SECONDO; if not, write to the Free Software
|
||
|
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||
|
|
----
|
||
|
|
|
||
|
|
//paragraph [10] title: [{\Large \bf ] [}]
|
||
|
|
//paragraph [11] title: [{\large \bf ] [}]
|
||
|
|
//paragraph [12] title: [{\normalsize \bf ] [}]
|
||
|
|
//paragraph [21] table1column: [\begin{quote}\begin{tabular}{l}] [\end{tabular}\end{quote}]
|
||
|
|
//paragraph [22] table2columns: [\begin{quote}\begin{tabular}{ll}] [\end{tabular}\end{quote}]
|
||
|
|
//paragraph [23] table3columns: [\begin{quote}\begin{tabular}{lll}] [\end{tabular}\end{quote}]
|
||
|
|
//paragraph [24] table4columns: [\begin{quote}\begin{tabular}{llll}] [\end{tabular}\end{quote}]
|
||
|
|
//[--------] [\hline]
|
||
|
|
//characters [1] verbatim: [$] [$]
|
||
|
|
//characters [2] formula: [$] [$]
|
||
|
|
//characters [3] capital: [\textsc{] [}]
|
||
|
|
//characters [4] teletype: [\texttt{] [}]
|
||
|
|
//[ae] [\"a]
|
||
|
|
//[oe] [\"o]
|
||
|
|
//[ue] [\"u]
|
||
|
|
//[ss] [{\ss}]
|
||
|
|
//[<=] [\leq]
|
||
|
|
//[#] [\neq]
|
||
|
|
//[tilde] [\verb|~|]
|
||
|
|
|
||
|
|
1 Header File: IndexableAttribute
|
||
|
|
|
||
|
|
May 1998 Stefan Dieker
|
||
|
|
|
||
|
|
December 1998 Friedhelm Becker
|
||
|
|
|
||
|
|
April 2002 Ulrich Telle Adjustments for the new Secondo version
|
||
|
|
|
||
|
|
1 Class ~IndexableAttribute~
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef INDEXABLEATTRIBUTE_H
|
||
|
|
#define INDEXABLEATTRIBUTE_H
|
||
|
|
|
||
|
|
#include "Attribute.h"
|
||
|
|
|
||
|
|
/*
|
||
|
|
2 Class ~IndexableAttribute~
|
||
|
|
|
||
|
|
This class is intended to be used for data types that need to be indexed by B-Trees.
|
||
|
|
The standard types such as ~int~, ~string~, and ~real~ are directly supported. For
|
||
|
|
the other (more complex) data types, they need to be converted to a string
|
||
|
|
(char pointer) and then indexed. The string representation of the objects should
|
||
|
|
preserve the ordering. These data types must also belong to the kind ~INDEXABLE~.
|
||
|
|
For an example, see the ~DateTime~ algebra.
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
class IndexableAttribute : public Attribute
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
IndexableAttribute() {}
|
||
|
|
|
||
|
|
IndexableAttribute(const bool defined): Attribute(defined){}
|
||
|
|
|
||
|
|
virtual void WriteTo( char *dest ) const = 0;
|
||
|
|
/*
|
||
|
|
This function writes the object value to a string ~dest~.
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
virtual void ReadFrom( const char *src ) = 0;
|
||
|
|
/*
|
||
|
|
This function reads the object value from a string ~src~.
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
virtual SmiSize SizeOfChars() const = 0;
|
||
|
|
/*
|
||
|
|
This function returns the number of bytes of the object's string representation.
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|