added OBackendFactory for advanced backend access

4 files changed, 110 insertions, 2 deletions

diff --git a/libopie/pim/obackendfactory.h b/libopie/pim/obackendfactory.h
new file mode 100644
index 0000000..599fbf2
--- a/dev/null
+++ b/libopie/pim/obackendfactory.h
@@ -0,0 +1,88 @@
+/*
+ * Class to manage Backends.
+ *
+ * Copyright (c) 2002 by Stefan Eilers (Eilers.Stefan@epost.de)
+ *
+ * =====================================================================
+         *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: Use plugins 
+ * =====================================================================
+ * Version: $Id$
+ * =====================================================================
+ * History:
+ * $Log$
+ * Revision 1.1  2002/10/07 17:35:01  eilers
+ * added OBackendFactory for advanced backend access
+ *
+ *
+ * =====================================================================
+ */
+#ifndef __OPIE_BACKENDFACTORY_H_
+#define __OPIE_BACKENDFACTORY_H_
+
+#include <qstring.h>
+#include <qasciidict.h>
+#include <qpe/config.h>
+
+#include "otodoaccessxml.h"
+#include "ocontactaccessbackend_xml.h"
+#include "otodoaccesssql.h"
+
+
+template<class T>
+class OBackendFactory
+{
+ public:
+        OBackendFactory() {};
+
+        enum BACKENDS {
+                TODO,
+                CONTACT,
+                DATE
+        };
+        
+        static T* Default( const QString backendName, const QString& appName ){
+        
+
+                Config config( "pimaccess" );
+                config.setGroup ( backendName );
+                QString backend = config.readEntry( "usebackend" );
+
+                QAsciiDict<int> dict ( 3 );
+                dict.setAutoDelete ( TRUE );
+
+                dict.insert( "todo", new int (TODO) );
+                dict.insert( "contact", new int (CONTACT) );
+
+                qWarning ("TODO is: %d", TODO);
+                qWarning ("CONTACT is: %d", CONTACT);
+        
+                switch ( *dict.take( backendName ) ){
+                case TODO:
+                        if ( backend == "sql" ) 
+                                return (T*) new OTodoAccessBackendSQL("");
+                        
+                        return (T*) new OTodoAccessXML( appName );
+                case CONTACT:
+                        if ( backend == "sql" ) 
+                                qWarning ("OBackendFactory:: sql Backend not implemented! Using XML instead!");
+
+                        return (T*) new OContactAccessBackend_XML( appName );
+                case DATE:
+                        qWarning ("OBackendFactory:: DATE-Backend not implemented!");
+                        return NULL;
+                default:
+                        return NULL;
+                }
+        
+        
+        }
+};
+
+
+#endif
diff --git a/libopie/pim/ocontactaccess.cpp b/libopie/pim/ocontactaccess.cpp
index 8a8ff08..b5f358b 100644
--- a/libopie/pim/ocontactaccess.cpp
+++ b/libopie/pim/ocontactaccess.cpp
@@ -1,97 +1,103 @@
 /*
  * Class to manage the Contacts.
  *
  * Copyright (c) 2002 by Stefan Eilers (Eilers.Stefan@epost.de)
  *
  * =====================================================================
          *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.
  * =====================================================================
  * Info: This class could just work with a change in the header-file
  *       of the Contact class ! Therefore our libopie only compiles
  *       with our version of libqpe
  * =====================================================================
  * ToDo: XML-Backend: Automatic reload if something was changed...
  *
  *
  * =====================================================================
  * Version: $Id$
  * =====================================================================
  * History:
  * $Log$
+ * Revision 1.3  2002/10/07 17:34:24  eilers
+ * added OBackendFactory for advanced backend access
+ *
  * Revision 1.2  2002/10/02 16:18:11  eilers
  * debugged and seems to work almost perfectly ..
  *
  * 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 !
  *
  *
  */
 
 #include "ocontactaccess.h"
+#include "obackendfactory.h"
 
 #include <qasciidict.h>
 #include <qdatetime.h>
 #include <qfile.h>
 #include <qregexp.h>
 #include <qlist.h>
 #include <qcopchannel_qws.h>
 
 //#include <qpe/qcopenvelope_qws.h>
 #include <qpe/global.h>
 
 #include <errno.h>
 #include <fcntl.h>
 #include <unistd.h>
 #include <stdlib.h>
 
 #include "ocontactaccessbackend_xml.h"
 
 
-OContactAccess::OContactAccess ( const QString appname, const QString filename,
+OContactAccess::OContactAccess ( const QString appname, const QString ,
                          OContactAccessBackend* end, bool autosync ):
         OPimAccessTemplate<OContact>( end ),
         m_changed ( false )
 {
         /* take care of the backend. If there is no one defined, we 
          * will use the XML-Backend as default (until we have a cute SQL-Backend..).
          */
         if( end == 0 ) {
-                end = new OContactAccessBackend_XML( appname, filename );
+                // __asm__("int3");
+                qWarning ("Using BackendFactory !");
+                end = OBackendFactory<OContactAccessBackend>::Default( "contact", appname );
         }
         // Set backend locally and in template
         m_backEnd = end;
         OPimAccessTemplate<OContact>::setBackEnd (end);
         
 
         /* Connect signal of external db change to function */
         QCopChannel *dbchannel = new QCopChannel( "QPE/PIM", this );
         connect( dbchannel, SIGNAL(received(const QCString &, const QByteArray &)),
                this, SLOT(copMessage( const QCString &, const QByteArray &)) );
         if ( autosync ){
                 QCopChannel *syncchannel = new QCopChannel( "QPE/Sync", this );
                 connect( syncchannel, SIGNAL(received(const QCString &, const QByteArray &)),
                          this, SLOT(copMessage( const QCString &, const QByteArray &)) );
         }
 
 
 }
 OContactAccess::~OContactAccess ()
 {
         /* The user may forget to save the changed database, therefore try to
          * do it for him..
          */
         if ( m_changed ) 
                 save();
         // delete m_backEnd; is done by template..
 }
 
 bool OContactAccess::load()
 {
         return ( m_backEnd->load() );
 }
diff --git a/libopie/pim/ocontactaccessbackend.h b/libopie/pim/ocontactaccessbackend.h
index 9469bbc..a651477 100644
--- a/libopie/pim/ocontactaccessbackend.h
+++ b/libopie/pim/ocontactaccessbackend.h
@@ -1,66 +1,70 @@
 /**
  * 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 1.2  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"
 
 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;
 
         /** 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;
diff --git a/libopie/pim/ocontactaccessbackend_xml.h b/libopie/pim/ocontactaccessbackend_xml.h
index 2cdb45b..97ef40f 100644
--- a/libopie/pim/ocontactaccessbackend_xml.h
+++ b/libopie/pim/ocontactaccessbackend_xml.h
@@ -1,71 +1,81 @@
 /*
  * XML Backend for the OPIE-Contact Database.
  *
  * Copyright (c) 2002 by Stefan Eilers (Eilers.Stefan@epost.de)
  *
  * =====================================================================
          *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: XML-Backend: Automatic reload if something was changed...
  *
  *
  * =====================================================================
  * Version: $Id$
  * =====================================================================
  * History:
  * $Log$
+ * 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_XML_
 #define _OContactAccessBackend_XML_
 
 #include <qasciidict.h>
 #include <qdatetime.h>
 #include <qfile.h>
+#include <qfileinfo.h>
 #include <qregexp.h>
 #include <qarray.h>
 
+#include <qpe/global.h>
+
 #include <opie/xmltree.h>
 #include "ocontactaccessbackend.h"
+#include "ocontactaccess.h"
+
+#include <stdlib.h>
+#include <errno.h>
 
 using namespace Opie;
 
 /* the default xml implementation */
 class OContactAccessBackend_XML : public OContactAccessBackend {
  public:
         OContactAccessBackend_XML ( QString appname, QString filename = 0l )
                 {
                         m_appName = appname;
                         
                         /* Set journalfile name ... */
                         m_journalName = getenv("HOME");
                         m_journalName +="/.abjournal" + appname;
                         
                         /* Expecting to access the default filename if nothing else is set */
                         if ( filename.isEmpty() ){
                                 m_fileName = Global::applicationFileName( "addressbook","addressbook.xml" );
                         } else
                                 m_fileName = filename;
                         
                         /* Load Database now */
                         load ();
                 }
         
         bool save() {
                 QString strNewFile = m_fileName + ".new";
                 QFile f( strNewFile );
                 if ( !f.open( IO_WriteOnly|IO_Raw ) )
                         return false;
                 
                 int total_written;
                 QString out;