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/*
This file is part of the Opie Project
Copyright (C) Holger Freyther <freyther@handhelds.org>
Copyright (C) Stefan Eilers <stefan@eilers-online.net>
=. Copyright (C) The Opie Team <opie-devel@handhelds.org>
.=l.
.>+-=
_;:, .> :=|. This program is free software; you can
.> <`_, > . <= redistribute it and/or modify it under
:`=1 )Y*s>-.-- : the terms of the GNU Library General Public
.="- .-=="i, .._ License as published by the Free Software
- . .-<_> .<> Foundation; either version 2 of the License,
._= =} : or (at your option) any later version.
.%`+i> _;_.
.i_,=:_. -<s. This program 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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
/**
* The class responsible for managing a backend.
* The implementation of this abstract class contains
* the complete database handling.
*
* Copyright (c) 2002 by Stefan Eilers (Eilers.Stefan@epost.de)
* Copyright (c) 2002 by Holger Freyther (zecke@handhelds.org)
*
*/
#ifndef _OCONTACTACCESSBACKEND_H_
#define _OCONTACTACCESSBACKEND_H_
#include <opie2/opimcontact.h>
#include <opie2/opimaccessbackend.h>
#include <qregexp.h>
namespace Opie {
/**
* This class represents the interface of all Contact Backends.
* Derivates of this class will be used to access the contacts.
* As implementation currently XML and vCard exist. This class needs to be implemented
* if you want to provide your own storage.
* In all queries a list of uids is passed on instead of loading the actual record!
*
* @see OPimContactAccessBackend_VCard
* @see OPimContactAccessBackend_XML
*/
class OPimContactAccessBackend: public OPimAccessBackend<OPimContact> {
public:
OPimContactAccessBackend();
/**
* Return if database was changed externally.
* This may just make sense on file based databases like a XML-File.
* It is used to prevent to overwrite the current database content
* if the file was already changed by something else !
* If this happens, we have to reload before save our data.
* If we use real databases, this should be handled by the database
* management system themselve, therefore this function should always return false in
* this case. It is not our problem to handle this conflict ...
* @return <i>true</i> if the database was changed and if save without reload will
* be dangerous. <i>false</i> if the database was not changed or it is save to write
* in this situation.
*/
virtual bool wasChangedExternally() = 0;
/**
* Return all possible settings.
* @return All settings provided by the current backend
* (i.e.: query_WildCards & query_IgnoreCase)
*/
const uint querySettings() const;
/**
* Check whether settings are correct.
* @return <i>true</i> if the given settings are correct and possible.
*/
bool hasQuerySettings (uint querySettings) const;
/**
* Advanced search mechanism.
*/
UIDArray queryByExample( const UIDArray& uidlist, const OPimContact&, int settings, const QDateTime &d = QDateTime() ) const;
/**
* Slow and inefficent default implementation
*/
//@{
UIDArray sorted( const UIDArray&, bool asc, int, int, const QArray<int>& )const;
OPimBackendOccurrence::List occurrences( const QDate&, const QDate& )const;
//@}
private:
class Private;
Private *d;
};
}
#endif
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