Fixing bug #1501 and preparing for implementation of generic QueryByExample and

sorted for datebook and todo..

13 files changed, 134 insertions, 42 deletions

diff --git a/libopie2/opiepim/ChangeLog b/libopie2/opiepim/ChangeLog
index 564e92a..2007744 100644
--- a/libopie2/opiepim/ChangeLog
+++ b/libopie2/opiepim/ChangeLog
@@ -1,21 +1,23 @@
 2004-12-28  Stefan Eilers <stefan@eilers-online.net>
         * Make improved query by example accessable via frontend
-        * Some API improvement
+        * Some API documentation improvement
+        * Cleanup of backend api..
+        * Fixing bug #1501
 2004-11-23  Stefan Eilers <stefan@eilers-online.net>
         * Implement fast and full featured version of sorted() for addressbook
         * Implement generic queryByExample for all Addressboook backends. It allows incremental search.
         * Update of API Documentation
 2004-11-18  Holger Freyther  <freyther@handhelds.org>
         * Every Access can give a set of Occurrences for a period or a datetime
         * QueryByExample, Find, Sort can be generically accessed by OPimBase 
           pointer interface
         * OPimBackendOccurrence gets split up to OPimOccurrences by 
           OPimTemplateBase
         * Add safeCast to various OPimRecords
         * Kill memleak in OPimTodo
         * Add SortVector implementations for OPimTodo and OPimContact
         
         2004-??-??The Opie Team <opie@handhelds.org>
         * Implemented some important modifications to allow to use OPimRecords as it is, without
           have to cast them. This makes it possible to write applications which handling pim
           data in a generic manner (see opimconvertion tool) (eilers)
\ No newline at end of file
diff --git a/libopie2/opiepim/backend/ocontactaccessbackend.h b/libopie2/opiepim/backend/ocontactaccessbackend.h
index ee6dbc2..27d70ab 100644
--- a/libopie2/opiepim/backend/ocontactaccessbackend.h
+++ b/libopie2/opiepim/backend/ocontactaccessbackend.h
@@ -59,53 +59,53 @@ 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)
      */
-    virtual const uint querySettings() const;
+    const uint querySettings() const;
 
     /**
      * Check whether settings are correct.
      * @return <i>true</i> if the given settings are correct and possible.
      */
-    virtual bool hasQuerySettings (uint querySettings) const;
+    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
diff --git a/libopie2/opiepim/backend/ocontactaccessbackend_sql.cpp b/libopie2/opiepim/backend/ocontactaccessbackend_sql.cpp
index 9375f43..2368865 100644
--- a/libopie2/opiepim/backend/ocontactaccessbackend_sql.cpp
+++ b/libopie2/opiepim/backend/ocontactaccessbackend_sql.cpp
@@ -258,75 +258,77 @@ namespace {
         id = 0;
         QMap<QString, QString> customMap = m_contact.toExtraMap();
         for( QMap<QString, QString>::Iterator it = customMap.begin();
              it != customMap.end(); ++it ){
             qu  += "insert into custom_data VALUES("
                 +  QString::number( m_contact.uid() )
                 + ","
                 +  QString::number( id++ )
                 + ",'"
                 + it.key()
                 + "',"
                 + "0" // Priority for future enhancements
                 + ",'"
                 + it.data()
                 + "');";
         }
         // qu  += "commit;";
         odebug << "add " << qu << "" << oendl;
         return qu;
     }
 
 
     RemoveQuery::RemoveQuery(int uid )
         : OSQLQuery(), m_uid( uid ) {}
+
     RemoveQuery::~RemoveQuery() {}
+
     QString RemoveQuery::query()const {
         QString qu = "DELETE from addressbook where uid = "
             + QString::number(m_uid) + ";";
         qu += "DELETE from custom_data where uid = "
             + QString::number(m_uid) + ";";
         return qu;
     }
 
 
-
-
     FindQuery::FindQuery(int uid)
         : OSQLQuery(), m_uid( uid ) {
     }
     FindQuery::FindQuery(const UIDArray& ints)
         : OSQLQuery(), m_uids( ints ){
     }
     FindQuery::~FindQuery() {
     }
     QString FindQuery::query()const{
-            if ( m_uids.count() == 0 )
-                    return single();
-            else
-                    return multi();
+           if ( m_uids.count() == 0 )
+                   return single();
+           else
+                   return multi();
     }
 
+
+
     QString FindQuery::multi()const {
             QString qu = "select * from addressbook where";
             for (uint i = 0; i < m_uids.count(); i++ ) {
                     qu += " uid = " + QString::number( m_uids[i] ) + " OR";
             }
             qu.remove( qu.length()-2, 2 ); // Hmmmm..
 
             odebug << "find query: " << qu << "" << oendl;
             return qu;
     }
 
     QString FindQuery::single()const{
             QString qu = "select *";
             qu += " from addressbook where uid = " + QString::number(m_uid);
 
             // owarn << "find query: " << qu << "" << oendl;
             return qu;
     }
 
 
     FindCustomQuery::FindCustomQuery(int uid)
         : OSQLQuery(), m_uid( uid ) {
     }
     FindCustomQuery::FindCustomQuery(const UIDArray& ints)
@@ -507,52 +509,65 @@ OPimContact OPimContactAccessBackend_SQL::find( int uid, const UIDArray& queryUi
         for ( uint i = current; i < queryUids.count() && size < numReadAhead; i++ ) {
             searchList[size] = queryUids[i];
             size++;
         }
         break;
         /* reverse */
     case Frontend::Reverse:
         for ( uint i = current; i != 0 && size <  numReadAhead; i-- ) {
             searchList[size] = queryUids[i];
             size++;
         }
         break;
     }
 
     //Shrink to real size..
     searchList.resize( size );
 
     OPimContact retContact( requestContactsAndCache( uid, searchList ) );
 
     odebug << "OPimContactAccessBackend_SQL::find( ..multi.. ) needed: " << t.elapsed() << " ms" << oendl;
     return retContact;
 }
 
 
-UIDArray OPimContactAccessBackend_SQL::queryByExample ( const OPimContact &query, int settings, 
+UIDArray OPimContactAccessBackend_SQL::queryByExample ( const UIDArray& uidlist, const OPimContact &query, int settings, 
                                                            const QDateTime& qd ) const
 {
     QString qu = "SELECT uid FROM addressbook WHERE";
+
+    // Just add uid's selection if we really try to search in a subset of all uids! Otherwise this would
+    // just take time and memory!
+    if ( uidlist.count() != m_uids.count() ) {
+            qu += " (";
+
+            for ( uint i = 0; i < uidlist.count(); i++ ) {
+                    qu += " uid = " + QString::number( uidlist[i] ) + " OR";
+            }
+            qu.remove( qu.length()-2, 2 ); // Hmmmm..
+            qu += " ) AND ";
+    }
+
     QString searchQuery ="";
 
     QDate startDate;
 
     if ( qd.isValid() )
         startDate = qd.date();
     else
         startDate = QDate::currentDate();
 
 
     QMap<int, QString> queryFields = query.toMap();
     QStringList fieldList = OPimContactFields::untrfields( false );
     QMap<QString, int> translate = OPimContactFields::untrFieldsToId();
 
     // Convert every filled field to a SQL-Query
 //  bool isAnyFieldSelected = false;
     for ( QStringList::Iterator it = ++fieldList.begin(); it != fieldList.end(); ++it ){
 
         int id = translate[*it];
         QString queryStr = queryFields[id];
         QDate* endDate = 0l;
 
         if ( !queryStr.isEmpty() ){
             // If something is alredy stored in the query, add an "AND"
diff --git a/libopie2/opiepim/backend/ocontactaccessbackend_sql.h b/libopie2/opiepim/backend/ocontactaccessbackend_sql.h
index 299c175..1cf1185 100644
--- a/libopie2/opiepim/backend/ocontactaccessbackend_sql.h
+++ b/libopie2/opiepim/backend/ocontactaccessbackend_sql.h
@@ -54,49 +54,49 @@ namespace Opie {
 /**
  * This class is the SQL implementation of a Contact backend
  * it does implement everything available for OPimContact.
  * @see OPimAccessBackend for more information of available methods
  */
 class OPimContactAccessBackend_SQL : public OPimContactAccessBackend {
  public:
         OPimContactAccessBackend_SQL ( const QString& appname, const QString& filename = QString::null );
 
         ~OPimContactAccessBackend_SQL ();
 
         bool save();
 
         bool load ();
 
         void clear ();
 
         bool wasChangedExternally();
 
         UIDArray allRecords() const;
 
         OPimContact find( int uid ) const;
         OPimContact find( int uid, const UIDArray& items, uint cur, Frontend::CacheDirection ) const; 
 
-        UIDArray queryByExample ( const OPimContact &query, int settings, 
+        UIDArray queryByExample ( const UIDArray& uidlist, const OPimContact &query, int settings, 
                                      const QDateTime& d ) const;
 
         UIDArray matchRegexp(  const QRegExp &r ) const;
 
         const uint querySettings() const;
 
         bool hasQuerySettings (uint querySettings) const;
 
         UIDArray sorted( const UIDArray& ar, bool asc, int sortOrder,
                                  int filter, const QArray<int>& categories)const;
 
          bool add ( const OPimContact &newcontact );
 
         bool replace ( const OPimContact &contact );
 
         bool remove ( int uid );
         bool reload();
 
  private:
         UIDArray extractUids( Opie::DB::OSQLResult& res ) const;
         QMap<int, QString>  requestNonCustom( int uid ) const;
         QMap<QString, QString>  requestCustom( int uid ) const;
         QMap<int, QString> fillNonCustomMap( const Opie::DB::OSQLResultItem& resultItem ) const;
         OPimContact requestContactsAndCache( int uid, const QArray<int>& cachelist ) const;
diff --git a/libopie2/opiepim/backend/odatebookaccessbackend.cpp b/libopie2/opiepim/backend/odatebookaccessbackend.cpp
index 73c7059..e44912a 100644
--- a/libopie2/opiepim/backend/odatebookaccessbackend.cpp
+++ b/libopie2/opiepim/backend/odatebookaccessbackend.cpp
@@ -79,72 +79,89 @@ void repeat( OPimBackendOccurrence::List& tmpList, const OPimEvent::ValueList& l
         }
     }
 }
 }
 
 namespace Opie {
 
 ODateBookAccessBackend::ODateBookAccessBackend()
     : OPimAccessBackend<OPimEvent>()
 {
 
 }
 ODateBookAccessBackend::~ODateBookAccessBackend() {
 
 }
 OPimBackendOccurrence::List ODateBookAccessBackend::occurrences( const QDate& from,
                                                                  const QDate& to )const {
     OPimBackendOccurrence::List tmpList;
 
     events( tmpList, directNonRepeats(), from, to );
     repeat( tmpList, directRawRepeats(),from,to );
 
     return tmpList;
 }
-OPimBackendOccurrence::List ODateBookAccessBackend::occurrences( const QDateTime& dt )const {
+
+OPimBackendOccurrence::List ODateBookAccessBackend::occurrences( const QDateTime& dt )const 
+{
     OPimBackendOccurrence::List day = occurrences( dt.date(), dt.date() );
 
     return filterOccurrences( day, dt );
 }
 
 OPimBackendOccurrence::List ODateBookAccessBackend::effectiveNonRepeatingEvents( const QDate& from,
-                                                                                 const QDate& to )const {
+                                                                                 const QDate& to )const 
+{
     OPimBackendOccurrence::List tmpList;
     OPimEvent::ValueList list = directNonRepeats();
 
     events( tmpList, list, from, to );
 
     return tmpList;
 }
 
-OPimBackendOccurrence::List ODateBookAccessBackend::effectiveNonRepeatingEvents( const QDateTime& dt )const {
+OPimBackendOccurrence::List ODateBookAccessBackend::effectiveNonRepeatingEvents( const QDateTime& dt )const 
+{
     OPimBackendOccurrence::List day = effectiveNonRepeatingEvents( dt.date(), dt.date() );
     return filterOccurrences( day,dt );
 }
 
+const uint ODateBookAccessBackend::querySettings() const
+{
+        return 0;
+}
+
+bool ODateBookAccessBackend::hasQuerySettings (uint querySettings) const
+{
+        return false;
+}
+
+
 
-UIDArray ODateBookAccessBackend::queryByExample( const OPimEvent&, int settings,
-                                                 const QDateTime& d )const {
+UIDArray ODateBookAccessBackend::queryByExample( const UIDArray& uidlist, const OPimEvent&, int settings,
+                                                 const QDateTime& d )const 
+{
+        qDebug( "Accessing ODateBookAccessBackend::queryByExample() which is not implemented!" );
     return UIDArray();
 }
 
 UIDArray ODateBookAccessBackend::sorted( const UIDArray&, bool asc, int, int, const QArray<int>& )const {
     return UIDArray();
 }
 
 OPimBackendOccurrence::List ODateBookAccessBackend::filterOccurrences( const OPimBackendOccurrence::List dayList,
                                                                        const QDateTime& dt ) {
     OPimBackendOccurrence::List tmpList;
     OPimBackendOccurrence::List::ConstIterator it;
 
     for ( it = dayList.begin(); it != dayList.end(); ++it ) {
         OPimBackendOccurrence occ = *it;
 
         /*
          * Let us find occurrences that are 'now'!
          * If the dt.date() is on the same day as start or end of the Occurrence
          * check how near start/end are.
          * If it is in the middle of a multiday occurrence list it.
          *
          * We might want to 'lose' the sixty second offset and list
          * all Events which are active at that time.
          */
diff --git a/libopie2/opiepim/backend/odatebookaccessbackend.h b/libopie2/opiepim/backend/odatebookaccessbackend.h
index 8927ca1..91f63aa 100644
--- a/libopie2/opiepim/backend/odatebookaccessbackend.h
+++ b/libopie2/opiepim/backend/odatebookaccessbackend.h
@@ -73,42 +73,55 @@ public:
      * Same as above but return raw repeats!
      */
     virtual OPimEvent::ValueList directRawRepeats()const = 0;
 
     /* is implemented by default but you can reimplement it*/
     /**
      * Effective Events are special event occuring during a time frame. This method does calcualte
      * EffectiveEvents bases on the directNonRepeats and directRawRepeats. You may implement this method
      * yourself
      */
     virtual OPimBackendOccurrence::List effectiveNonRepeatingEvents( const QDate& from, const QDate& to )const;
 
     /**
      * this is an overloaded member function
      * @see effectiveNonRepeatingEvents( const QDate& from, const QDate& to )
      */
     virtual OPimBackendOccurrence::List effectiveNonRepeatingEvents( const QDateTime& start )const;
 
     /**
      * Common and probably inefficent implementation
      * for queryByExample, sorted
      * and occurrences
      */
 //@{
-    UIDArray queryByExample( const OPimEvent&, int settings, const QDateTime& d = QDateTime() )const;
+    /**
+     *  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;
+
+    UIDArray queryByExample( const UIDArray& uidlist, const OPimEvent&, int settings, const QDateTime& d = QDateTime() )const;
     UIDArray sorted( const UIDArray&, bool asc, int, int, const QArray<int>& )const;
     OPimBackendOccurrence::List occurrences( const QDate&, const QDate& end )const;
     OPimBackendOccurrence::List occurrences( const QDateTime& )const;
 //@}
 
 protected:
     static OPimBackendOccurrence::List filterOccurrences(const OPimBackendOccurrence::List,
                                                          const QDateTime& time );
 private:
     class Private;
     Private *d;
 
 };
 
 }
 
 #endif
diff --git a/libopie2/opiepim/backend/opimaccessbackend.h b/libopie2/opiepim/backend/opimaccessbackend.h
index 7321758..6666fd6 100644
--- a/libopie2/opiepim/backend/opimaccessbackend.h
+++ b/libopie2/opiepim/backend/opimaccessbackend.h
@@ -54,64 +54,64 @@ class OPimAccessBackend {
 public:
     typedef OTemplateBase<T> Frontend;
 
     //@{
     OPimAccessBackend(int access = 0);
     virtual ~OPimAccessBackend();
     //@}
 
     //@{
     virtual bool load() = 0;
     virtual bool reload() = 0;
     virtual bool save() = 0;
     virtual void clear() = 0;
     //@}
 
     //@{
     // FIXME: Uncommented some of the abstract functions below. This should be removed as they are implemented in 
     // all typespecifc backenends (eilers) 
     /**
      *  Return all possible settings for queryByExample()
      *  @return All settings provided by the current backend
      *  (i.e.: query_WildCards & query_IgnoreCase)
      *  See implementation in the specific backends for contacts, todo and dates.
      */
-    virtual const uint querySettings() const { return 0; } /* FIXME: Make Abstrakt !! = 0; */ 
+    virtual const uint querySettings() const = 0;
 
     /**
      * Check whether settings are correct for queryByExample()
      * See implementation in the specific backends for OPimContactAccess, OPimTodoAccess and ODateBookAccess.
      * @return <i>true</i> if the given settings are correct and possible.
      */
-    virtual bool hasQuerySettings (uint querySettings) const { return false; } /* FIXME: Make Abstrakt !! = 0; */
+    virtual bool hasQuerySettings (uint querySettings) const = 0;
     //@}
 
 
     //@{
     virtual UIDArray allRecords()const = 0;
     virtual UIDArray matchRegexp(const QRegExp &r) const;
     virtual UIDArray queryByExample( const UIDArray&, const T& t, 
-                                     int settings, const QDateTime& d = QDateTime() )const  { return UIDArray(); } /* FIXME: Make Abstrakt !! = 0; */
+                                     int settings, const QDateTime& d = QDateTime() )const = 0;
     virtual UIDArray queryByExample( const T& t, int settings, const QDateTime& d = QDateTime() )const;
     virtual UIDArray queryByExample( const OPimRecord* rec, int settings, const QDateTime& d = QDateTime() )const;
     virtual UIDArray sorted( const UIDArray&, bool asc, int sortOrder, int sortFilter,  const QArray<int>& cats )const = 0;
     virtual UIDArray sorted( bool asc, int sortOrder, int sortFilter, const QArray<int>& cats )const;
     virtual OPimBackendOccurrence::List occurrences( const QDate& start, const QDate& end)const;
     virtual OPimBackendOccurrence::List occurrences( const QDateTime& dt )const;
     //@}
 
 
     //@{
     virtual T find(UID uid )const  = 0;
     virtual T find(UID uid, const QArray<UID>& items,
                    uint current, typename Frontend::CacheDirection )const ;
     //@}
 
 
     //@{
     virtual bool add( const T& t ) = 0;
     virtual bool remove( UID uid ) = 0;
     virtual bool replace( const T& t ) = 0;
     //@}
 
 
 
diff --git a/libopie2/opiepim/backend/otodoaccessbackend.cpp b/libopie2/opiepim/backend/otodoaccessbackend.cpp
index 5f86be9..f979976 100644
--- a/libopie2/opiepim/backend/otodoaccessbackend.cpp
+++ b/libopie2/opiepim/backend/otodoaccessbackend.cpp
@@ -21,51 +21,77 @@
  :     =  ...= . :.=-
  -.   .:....=;==+<;          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.
 */
 
 #include <opie2/otodoaccessbackend.h>
 #include <opie2/private/opimtodosortvector.h>
 #include <opie2/otodoaccess.h>
 
 #include <qintdict.h>
 
 namespace Opie {
 OPimTodoAccessBackend::OPimTodoAccessBackend()
     : OPimAccessBackend<OPimTodo>()
 {
 }
 OPimTodoAccessBackend::~OPimTodoAccessBackend() {
 
 }
 
-UIDArray OPimTodoAccessBackend::queryByExample( const OPimTodo&, int settings,
-                                                 const QDateTime& d)const {
-    return UIDArray();
+const uint OPimTodoAccessBackend::querySettings() const
+{
+        return 0;
+}
+
+bool OPimTodoAccessBackend::hasQuerySettings (uint querySettings) const
+{
+        return false;
+}
+
+
+UIDArray OPimTodoAccessBackend::queryByExample( const UIDArray& uidlist, const OPimTodo& query, int settings,
+                                                 const QDateTime& endperiod )const 
+{
+        qDebug( "Accessing OPimTodoAccessBackend::queryByExample() which is not implemented!" );
+        return UIDArray();
+    
+//     odebug << "Using Unaccelerated OPimContactAccessBackend implementation of queryByExample!" << oendl;
+
+//     UIDArray m_currentQuery( uid_array.count() );
+//     uint arraycounter = 0;
+
+//     for( uint it = 0; it < uid_array.count(); ++it ){
+        //     /* Search all fields and compare them with query object. Store them into list
+        //      * if all fields matches.
+        //      */
+//     }
+
+
 }
 
 UIDArray OPimTodoAccessBackend::sorted( const UIDArray& events, bool asc,
                                         int sortOrder, int sortFilter,
                                         const QArray<int>& categories )const {
     odebug << "Using Unaccelerated TodoList sorted Implementation" << oendl;
     Internal::OPimTodoSortVector vector(events.count(), asc,sortOrder );
     int item = 0;
 
     bool bCat = sortFilter  & OPimTodoAccess::FilterCategory ? true : false;
     bool bOnly = sortFilter & OPimTodoAccess::OnlyOverDue ? true : false;
     bool comp = sortFilter  & OPimTodoAccess::DoNotShowCompleted ? true : false;
     bool catPassed = false;
     int cat;
 
     for ( uint i = 0; i < events.count(); ++i ) {
         OPimTodo todo = find( events[i], events, i, Frontend::Forward );
         if ( todo.isEmpty() )
             continue;
 
         /* show category */
         /* -1 == unfiled */
         catPassed = false;
         for ( uint cat_nu = 0; cat_nu < categories.count(); ++cat_nu ) {
diff --git a/libopie2/opiepim/backend/otodoaccessbackend.h b/libopie2/opiepim/backend/otodoaccessbackend.h
index 66297bb..870ee57 100644
--- a/libopie2/opiepim/backend/otodoaccessbackend.h
+++ b/libopie2/opiepim/backend/otodoaccessbackend.h
@@ -30,49 +30,62 @@
 #define OPIE_TODO_ACCESS_BACKEND_H
 
 #include <qbitarray.h>
 
 #include <opie2/opimtodo.h>
 #include <opie2/opimaccessbackend.h>
 
 namespace Opie {
 class OPimTodoAccessBackend : public OPimAccessBackend<OPimTodo> {
 public:
     OPimTodoAccessBackend();
     ~OPimTodoAccessBackend();
     virtual UIDArray effectiveToDos( const QDate& start,
                                      const QDate& end,
                                      bool includeNoDates )const = 0;
     virtual UIDArray overDue()const = 0;
     virtual void removeAllCompleted() = 0;
 
     /**
      * Common and probably inefficent implementation
      * for queryByExample, matchRegexp, sorted
      * and occurrences
      */
     //@{
-    UIDArray queryByExample( const OPimTodo&, int settings, const QDateTime& d = QDateTime() )const;
+    /**
+     *  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;
+
+    UIDArray queryByExample( const UIDArray& uidlist, const OPimTodo& query, int settings, const QDateTime& endperiod = QDateTime() )const;
     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;
 
 };
 }
 
 
 /**
  * \fn Opie::OPimBackendOccurrence::List Opie::OPimTodoAccessBackend::occurrences(const QDate& start,const QDate& end)const
  * \brief Return occurrences for a period of time
  *
  * This method will return the 'effective' Todos and also
  * 'Overdue' Todos. Overdues will be shown on the 'current'
  * day if it is in the range or on \par start. If the overdue
  * is inside the 'Effective Todos' we will skip the
  * special overdue handling.
  *
  *
  */
diff --git a/libopie2/opiepim/backend/otodoaccesssql.cpp b/libopie2/opiepim/backend/otodoaccesssql.cpp
index 2bcab29..70e40e4 100644
--- a/libopie2/opiepim/backend/otodoaccesssql.cpp
+++ b/libopie2/opiepim/backend/otodoaccesssql.cpp
@@ -280,71 +280,81 @@ namespace {
     id = 0;
     QMap<QString, QString> customMap = m_todo.toExtraMap();
     for( QMap<QString, QString>::Iterator it = customMap.begin();
          it != customMap.end(); ++it ){
         qu  += "insert into custom_data VALUES("
             +  QString::number( m_todo.uid() )
             + ","
             +  QString::number( id++ )
             + ",'"
             + it.key()
             + "',"
             + "0" // Priority for future enhancements
             + ",'"
             + it.data()
             + "');";
     }
 
 
         odebug << "add " << qu << "" << oendl;
         return qu;
     }
 
     RemoveQuery::RemoveQuery(int uid )
         : OSQLQuery(), m_uid( uid ) {}
+
     RemoveQuery::~RemoveQuery() {}
+
     QString RemoveQuery::query()const {
         QString qu = "DELETE FROM todolist WHERE uid = " + QString::number(m_uid) + " ;";
-    qu += "DELETE FROM custom_data WHERE uid = " + QString::number(m_uid);
+        qu += "DELETE FROM custom_data WHERE uid = " + QString::number(m_uid);
         return qu;
     }
 
 
     ClearQuery::ClearQuery()
         : OSQLQuery() {}
     ClearQuery::~ClearQuery() {}
-    QString ClearQuery::query()const {
-        QString qu = "drop table todolist";
-        return qu;
+    QString ClearQuery::query()const 
+    {
+            QString qu = "drop table todolist";
+            return qu;
     }
+
     FindQuery::FindQuery(int uid)
-        : OSQLQuery(), m_uid(uid ) {
+        : OSQLQuery(), m_uid(uid ) 
+    {
     }
+    
     FindQuery::FindQuery(const QArray<int>& ints)
-        : OSQLQuery(), m_uids(ints){
+            : OSQLQuery(), m_uids(ints)
+    {
     }
-    FindQuery::~FindQuery() {
+
+    FindQuery::~FindQuery() 
+    {
     }
+
     QString FindQuery::query()const{
         if (m_uids.count() == 0 )
             return single();
         else
             return multi();
     }
     QString FindQuery::single()const{
         QString qu = "select * from todolist where uid = " + QString::number(m_uid);
         return qu;
     }
     QString FindQuery::multi()const {
         QString qu = "select * from todolist where ";
         for (uint i = 0; i < m_uids.count(); i++ ) {
             qu += " UID = " + QString::number( m_uids[i] ) + " OR";
         }
         qu.remove( qu.length()-2, 2 );
         return qu;
     }
 
     OverDueQuery::OverDueQuery(): OSQLQuery() {}
     OverDueQuery::~OverDueQuery() {}
     QString OverDueQuery::query()const {
         QDate date = QDate::currentDate();
         QString str;
@@ -427,52 +437,52 @@ OPimTodoAccessBackendSQL::~OPimTodoAccessBackendSQL(){
 
 bool OPimTodoAccessBackendSQL::load(){
     if (!m_driver->open() )
         return false;
 
     CreateQuery creat;
     OSQLResult res = m_driver->query(&creat );
 
     m_dirty = true;
     return true;
 }
 bool OPimTodoAccessBackendSQL::reload(){
     return load();
 }
 
 bool OPimTodoAccessBackendSQL::save(){
     return m_driver->close();  // Shouldn't m_driver->sync be better than close ? (eilers)
 }
 QArray<int> OPimTodoAccessBackendSQL::allRecords()const {
     if (m_dirty )
         update();
 
     return m_uids;
 }
-QArray<int> OPimTodoAccessBackendSQL::queryByExample( const OPimTodo& , int, const QDateTime& ){
-    QArray<int> ints(0);
-    return ints;
-}
+// QArray<int> OPimTodoAccessBackendSQL::queryByExample( const UIDArray& uidlist, const OPimTodo& , int, const QDateTime& ){
+//     QArray<int> ints(0);
+//     return ints;
+// }
 OPimTodo OPimTodoAccessBackendSQL::find(int uid ) const{
     FindQuery query( uid );
     return parseResultAndCache( uid, m_driver->query(&query) );
 }
 
 // Remember: uid is already in the list of uids, called ints !
 OPimTodo OPimTodoAccessBackendSQL::find( int uid, const QArray<int>& ints,
                                    uint cur, Frontend::CacheDirection dir ) const{
     uint CACHE = readAhead();
     odebug << "searching for " << uid << "" << oendl;
     QArray<int> search( CACHE );
     uint size =0;
 
     // we try to cache CACHE items
     switch( dir ) {
     /* forward */
     case Frontend::Forward:
         for (uint i = cur; i < ints.count() && size < CACHE; i++ ) {
             search[size] = ints[i];
             size++;
         }
         break;
     /* reverse */
     case Frontend::Reverse:
@@ -598,49 +608,49 @@ QArray<int> OPimTodoAccessBackendSQL::sorted( bool asc, int sortOrder,
         break;
     case OPimTodoAccess::Priority:
         query += "priority";
         break;
     case OPimTodoAccess::SortSummary:
         query += "summary";
         break;
     case OPimTodoAccess::Deadline:
         query += "DueDate";
         break;
     }
 
     if ( !asc )
         query += " DESC";
 
 
     odebug << query << oendl;
     OSQLRawQuery raw(query );
     return uids( m_driver->query(&raw) );
 }
 #endif
 
 
 bool OPimTodoAccessBackendSQL::date( QDate& da, const QString& str ) const{
-    if ( str == "0-0-0" )
+    if ( str == "0000-00-00" )
         return false;
     else{
         int day, year, month;
         QStringList list = QStringList::split("-", str );
         year = list[0].toInt();
         month = list[1].toInt();
         day = list[2].toInt();
         da.setYMD( year, month, day );
         return true;
     }
 }
 
 
 OPimTodo OPimTodoAccessBackendSQL::parseResultAndCache( int uid, const OSQLResult& res ) const{
     if ( res.state() == OSQLResult::Failure ) {
         OPimTodo to;
         return to;
     }
 
     OPimTodo retTodo;
 
     OSQLResultItem::ValueList list = res.results();
     OSQLResultItem::ValueList::Iterator it = list.begin();
     OPimTodo to, tmp;
diff --git a/libopie2/opiepim/backend/otodoaccesssql.h b/libopie2/opiepim/backend/otodoaccesssql.h
index 0ba8f3a..ac3476a 100644
--- a/libopie2/opiepim/backend/otodoaccesssql.h
+++ b/libopie2/opiepim/backend/otodoaccesssql.h
@@ -32,49 +32,49 @@
 /* #include <qasciidict.h> */
 
 #include <opie2/otodoaccessbackend.h>
 
 namespace Opie {
 namespace DB   {
 class OSQLDriver;
 class OSQLResult;
 class OSQLResultItem;
 }
 }
 
 namespace Opie {
 
 class OPimTodoAccessBackendSQL : public OPimTodoAccessBackend {
 public:
     OPimTodoAccessBackendSQL( const QString& file );
     ~OPimTodoAccessBackendSQL();
 
     bool load();
     bool reload();
     bool save();
     QArray<UID> allRecords()const;
 
-    QArray<UID> queryByExample( const OPimTodo& t, int settings, const QDateTime& d = QDateTime() );
+/*     QArray<UID> queryByExample( const UIDArray& uidlist, const OPimTodo& t, int settings, const QDateTime& d = QDateTime() ); */
     OPimTodo find(UID uid)const;
     OPimTodo find(UID uid, const QArray<int>&, uint cur, Frontend::CacheDirection )const;
     void clear();
     bool add( const OPimTodo& t );
     bool remove( UID uid );
     bool replace( const OPimTodo& t );
 
     QArray<UID> overDue()const;
     QArray<UID> effectiveToDos( const QDate& start,
                                 const QDate& end, bool includeNoDates )const;
     QArray<UID> matchRegexp(  const QRegExp &r ) const;
     void removeAllCompleted();
 
 
 private:
     void update()const;
     inline bool date( QDate& date, const QString& )const;
     inline OPimTodo parseResultAndCache( UID uid, const Opie::DB::OSQLResult& )const;
     inline OPimTodo parse( Opie::DB::OSQLResultItem& )const;
     inline QArray<UID> uids( const Opie::DB::OSQLResult& )const;
     OPimTodo todo( UID uid )const;
     QMap<QString, QString>  requestCustom( UID uid ) const;
 
     // QAsciiDict<int> m_dict;
diff --git a/libopie2/opiepim/backend/otodoaccessxml.cpp b/libopie2/opiepim/backend/otodoaccessxml.cpp
index 273f91a..ab50604 100644
--- a/libopie2/opiepim/backend/otodoaccessxml.cpp
+++ b/libopie2/opiepim/backend/otodoaccessxml.cpp
@@ -305,52 +305,49 @@ bool OPimTodoAccessXML::save() {
         QFile::remove( strNewFile );
         return false;
     }
     /* flush before renaming */
     f.close();
 
     if( ::rename( strNewFile.latin1(),  m_file.latin1() ) < 0 ) {
         QFile::remove( strNewFile );
     }
 
     m_changed = false;
     return true;
 }
 QArray<int> OPimTodoAccessXML::allRecords()const {
     QArray<int> ids( m_events.count() );
     QMap<int, OPimTodo>::ConstIterator it;
     int i = 0;
 
     for ( it = m_events.begin(); it != m_events.end(); ++it )
         ids[i++] = it.key();
 
 
     return ids;
 }
-QArray<int> OPimTodoAccessXML::queryByExample( const OPimTodo&, int, const QDateTime& ) {
-    QArray<int> ids(0);
-    return ids;
-}
+
 OPimTodo OPimTodoAccessXML::find( int uid )const {
     OPimTodo todo;
     todo.setUid( 0 ); // isEmpty()
     QMap<int, OPimTodo>::ConstIterator it = m_events.find( uid );
     if ( it != m_events.end() )
         todo = it.data();
 
     return todo;
 }
 void OPimTodoAccessXML::clear() {
     if (m_opened )
         m_changed = true;
 
     m_events.clear();
 }
 bool OPimTodoAccessXML::add( const OPimTodo& todo ) {
     m_changed = true;
     m_events.insert( todo.uid(), todo );
 
     return true;
 }
 bool OPimTodoAccessXML::remove( int uid ) {
     m_changed = true;
     m_events.remove( uid );
diff --git a/libopie2/opiepim/backend/otodoaccessxml.h b/libopie2/opiepim/backend/otodoaccessxml.h
index 134a21a..8a71bb7 100644
--- a/libopie2/opiepim/backend/otodoaccessxml.h
+++ b/libopie2/opiepim/backend/otodoaccessxml.h
@@ -31,49 +31,48 @@
 
 #include <qasciidict.h>
 #include <qmap.h>
 
 #include <opie2/otodoaccessbackend.h>
 
 namespace Opie {
     class XMLElement;
 
 class OPimTodoAccessXML : public OPimTodoAccessBackend {
 public:
     /**
      * fileName if Empty we will use the default path
      */
     OPimTodoAccessXML( const QString& appName,
                     const QString& fileName = QString::null );
     ~OPimTodoAccessXML();
 
     bool load();
     bool reload();
     bool save();
 
     QArray<int> allRecords()const;
     QArray<int> matchRegexp(const QRegExp &r) const;
-    QArray<int> queryByExample( const OPimTodo&, int querysettings, const QDateTime& d = QDateTime() );
     OPimTodo find( int uid )const;
     void clear();
     bool add( const OPimTodo& );
     bool remove( int uid );
     void removeAllCompleted();
     bool replace( const OPimTodo& );
 
     /* our functions */
     QArray<int> effectiveToDos( const QDate& start,
                                 const QDate& end,
                                 bool includeNoDates )const;
     QArray<int> overDue()const;
 
 //@{
     UIDArray sorted( const UIDArray&, bool, int, int, const QArray<int>& )const;
 //@}
 private:
     void todo( QAsciiDict<int>*, OPimTodo&,const QCString&,const QString& );
     QString toString( const OPimTodo& )const;
     QString toString( const QArray<int>& ints ) const;
     QMap<int, OPimTodo> m_events;
     QString m_file;
     QString m_app;
     bool m_opened : 1;