/** * 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) * * ===================================================================== * This program 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. * ===================================================================== * ToDo: Define enum for query settings * ===================================================================== * Version: $Id$ * ===================================================================== * History: * $Log$ * Revision 1.6 2003/08/01 12:30:16 eilers * Merging changes from BRANCH_1_0 to HEAD * * Revision 1.5.4.1 2003/06/30 14:34:19 eilers * Patches from Zecke: * Fixing and cleaning up extraMap handling * Adding d_ptr for binary compatibility in the future * * Revision 1.5 2003/04/13 18:07:10 zecke * More API doc * QString -> const QString& * QString = 0l -> QString::null * * Revision 1.4 2002/11/13 14:14:51 eilers * Added sorted for Contacts.. * * Revision 1.3 2002/11/01 15:10:42 eilers * Added regExp-search in database for all fields in a contact. * * Revision 1.2 2002/10/07 17:34:24 eilers * added OBackendFactory for advanced backend access * * Revision 1.1 2002/09/27 17:11:44 eilers * Added API for accessing the Contact-Database ! It is compiling, but * please do not expect that anything is working ! * I will debug that stuff in the next time .. * Please read README_COMPILE for compiling ! * * ===================================================================== * */ #ifndef _OCONTACTACCESSBACKEND_H_ #define _OCONTACTACCESSBACKEND_H_ #include "ocontact.h" #include "opimaccessbackend.h" #include <qregexp.h> /** * 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 OContactAccessBackend_VCard * @see OContactAccessBackend_XML */ class OContactAccessBackend: public OPimAccessBackend<OContact> { public: OContactAccessBackend() {} virtual ~OContactAccessBackend() {} /** * 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; virtual QArray<int> matchRegexp( const QRegExp &r ) const = 0; /** * Return all possible settings. * @return All settings provided by the current backend * (i.e.: query_WildCards & query_IgnoreCase) */ virtual const uint querySettings() = 0; /** * Check whether settings are correct. * @return <i>true</i> if the given settings are correct and possible. */ virtual bool hasQuerySettings (uint querySettings) const = 0; /** * FIXME!!! * Returns a sorted list of records either ascendinf or descending for a giving criteria and category */ virtual QArray<int> sorted( bool ascending, int sortOrder, int sortFilter, int cat ) = 0; private: class Private; Private *d; }; #endif