* Make improved query by example accessable via frontend

	* Some API improvement

4 files changed, 74 insertions, 9 deletions

diff --git a/libopie2/opiepim/ChangeLog b/libopie2/opiepim/ChangeLog
index dd57259..564e92a 100644
--- a/libopie2/opiepim/ChangeLog
+++ b/libopie2/opiepim/ChangeLog
@@ -1,18 +1,21 @@
+2004-12-28  Stefan Eilers <stefan@eilers-online.net>
+	* Make improved query by example accessable via frontend
+	* Some API improvement
 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/core/ocontactaccess.h b/libopie2/opiepim/core/ocontactaccess.h
index bd85b4e..5051321 100644
--- a/libopie2/opiepim/core/ocontactaccess.h
+++ b/libopie2/opiepim/core/ocontactaccess.h
@@ -27,151 +27,151 @@
                              Boston, MA 02111-1307, USA.
 */
 /*
  * =====================================================================
  * ToDo: Define enum for query settings
  * =====================================================================
  */
 #ifndef _OCONTACTACCESS_H
 #define _OCONTACTACCESS_H
 
 #include <qobject.h>
 
 #include <qpe/qcopenvelope_qws.h>
 
 #include <qvaluelist.h>
 #include <qfileinfo.h>
 
 #include <opie2/opimcontact.h>
 #include <opie2/ocontactaccessbackend.h>
 #include <opie2/opimaccesstemplate.h>
 
 namespace Opie {
 /**
  * Class to access the contacts database.
  * This is just a frontend for the real database handling which is
  * done by the backend.
  * This class is used to access the Contacts on a system. This class as any OPIE PIM
  * class is backend independent.
  * @author Stefan Eilers, Holger Freyther
  * @see OPimAccessTemplate
  */
 class OPimContactAccess: public QObject, public OPimAccessTemplate<OPimContact>
 {
     Q_OBJECT
 
  public:
     /**
      * Filter for sorted()
      * @see SortFilterBase in OPimBase
      */
     enum SortFilter {
 	/** Don't return entries who don't have children */
         DoNotShowWithoutChildren        = FilterCustom<<1,
 	/** Don't return entries who don't have an anniversary */
         DoNotShowWithoutAnniversary     = FilterCustom<<2,
  	/** Don't return entries who don't have a birthday */
 	DoNotShowWithoutBirthday        = FilterCustom<<3,
  	/** Don't return entries who don't have a home address */
 	DoNotShowWithoutHomeAddress     = FilterCustom<<4,
 	/** Don't return entries who don't have a business address */
         DoNotShowWithoutBusinessAddress = FilterCustom<<5,
 	/** Don't return entries which hava any category */
 	DoNotShowWithCategory = FilterCustom << 6
     };
 
     /**
      * Sort order for sorted()
      * @see SortOrderBase in OPimBase
      */
     enum SortOrder {
         SortTitle = SortCustom,
         SortFirstName,
         SortMiddleName,
 	SortLastName,
         SortSuffix,
         SortEmail,
         SortNickname,
         SortFileAsName,
         SortAnniversary,
         SortBirthday,
         SortGender
     };
 
 	/**
          * Create Database with contacts (addressbook).
 	 * @param appname Name of application which wants access to the database
 	 * (i.e. "todolist")
 	 * @param filename The name of the database file. If not set, the default one
 	 * is used.
 	 * @param backend Pointer to an alternative Backend. If not set, we will use
 	 * the default backend.
 	 * @param handlesync If <b>true</b> the database stores the current state
 	 * automatically if it receives the signals <i>flush()</i> and <i>reload()</i>
 	 * which are used before and after synchronisation. If the application wants
 	 * to react itself, it should be disabled by setting it to <b>false</b>
 	 * @see OPimContactAccessBackend
 	 */
 	OPimContactAccess (const QString appname, const QString filename = 0l,
                            OPimContactAccessBackend* backend = 0l, bool handlesync = true);
         ~OPimContactAccess ();
 
 
 	/** 
 	 * Return all possible settings for queryByExample().
 	 *  @return All settings provided by the current backend
 	 * (i.e.: WildCards & IgnoreCase)
-	 * @see QuerySettings in OPimBase for details of the parameter
+	 * @see QuerySettings in OPimBase for details of the parameter, queryByExample()
 	 */
 	const uint querySettings();
 
 	/** 
 	 * Check whether settings are correct for queryByExample().
 	 * @return <i>true</i> if the given settings are correct and possible.
 	 * @see QuerySettings in OPimBase for details of the parameter
 	 */
 	bool hasQuerySettings ( int querySettings ) const;
 
 	/**
 	 * if the resource was changed externally.
 	 * You should use the signal instead of polling possible changes !
 	 */
 	bool wasChangedExternally()const;
 
 
 	/** Save contacts database.
 	 * Save is more a "commit". After calling this function, all changes are public available.
 	 * @return true if successful
 	 */
         bool save();
 
 	/**
 	 * Return identification of used records
 	 */
 	int rtti() const;
 
  signals:
 	/* Signal is emitted if the database was changed. Therefore
 	 * we may need to reload to stay consistent.
 	 * @param which Pointer to the database who created this event. This pointer
 	 * is useful if an application has to handle multiple databases at the same time.
 	 * @see reload()
 	 */
 	void signalChanged ( const OPimContactAccess *which );
 
 
  private:
         OPimContactAccessBackend *m_backEnd;
         bool m_loading:1;
 
  private slots:
 	void copMessage( const QCString &msg, const QByteArray &data );
 
  private:
         class Private;
 	Private *d;
 
 };
 
 }
 
 #endif
diff --git a/libopie2/opiepim/core/opimaccesstemplate.h b/libopie2/opiepim/core/opimaccesstemplate.h
index 073d5f9..3875f09 100644
--- a/libopie2/opiepim/core/opimaccesstemplate.h
+++ b/libopie2/opiepim/core/opimaccesstemplate.h
@@ -1,381 +1,443 @@
 /*
                              This file is part of the Opie Project
                              Copyright (C) Holger Freyther <zecke@handhelds.org>
                              Copyright (C) Stefan Eilers <eilers.stefan@epost.de>
               =.             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.
 */
 #ifndef OPIE_PIM_ACCESS_TEMPLATE_H
 #define OPIE_PIM_ACCESS_TEMPLATE_H
 
 /* OPIE */
 #include <opie2/opimrecord.h>
 #include <opie2/opimaccessbackend.h>
 #include <opie2/opimrecordlist.h>
 
 #include <opie2/opimtemplatebase.h>
 #include <opie2/odebug.h>
 
 /* QT */
 #include <qarray.h>
 #include <qdatetime.h>
 
 namespace Opie {
 
 class OPimAccessTemplatePrivate;
 /**
  * Thats the frontend to our OPIE PIM
  * Library. Either you want to use it's
  * interface or you want to implement
  * your own Access lib
  * Just create a OPimRecord and inherit from
  * the templates
  */
 
 template <class T = OPimRecord >
 class OPimAccessTemplate : public OTemplateBase<T> {
 public:
     /**
      *
      */
     enum Access {
         Random = 0,
         SortedAccess
     };
     typedef OPimRecordList<T> List;
     typedef OPimAccessBackend<T> BackEnd;
     typedef OPimCache<T> Cache;
 
     //@{
     OPimAccessTemplate( BackEnd* end);
     virtual ~OPimAccessTemplate();
     //@}
 
     //@{
     bool load();
     virtual bool reload();
     bool save();
     void clear() ;
     //@}
 
 
     bool wasChangedExternally()const;
 
     //@{
     virtual List allRecords()const;
     virtual List matchRegexp(  const QRegExp &r ) const;
-    virtual List queryByExample( const T& t, int querySettings, const QDateTime& d = QDateTime() );
+
+    /**
+     * Query by example search interface. 
+     * "Query by Example" provides a very powerful search engine. Use the query object 
+     * (this may be a contact, a todo or databook event) 
+     * as a search mask which is converted into a query regarding the querySettings. If a time period is needed 
+     * (as for OpimBase::DateDiff), you have to use the date/time in the query object and the endperiod (the last parameter).
+     * @see QuerySettings in class OPimBase 
+     * @param query The object which contains the query set
+     * @param querySettings This parameter defines what should be searched and how the query should be interpreted
+     * @param endperiod Defines the end of a period for some special queries.    
+     */
+    virtual List queryByExample( const T& query, int querySettings, const QDateTime& endperiod = QDateTime() );
+
+    /**
+     * Generic query by example search interface. This is a special version which handles generic OPimRecord types. They are converted 
+     * automatically into the right datatype.
+     * "Query by Example" provides a very powerful search engine. Use the query object (this may be a contact, a todo or databook event) 
+     * as a search mask which is converted into a query regarding the querySettings. If a time period is needed 
+     * (as for OpimBase::DateDiff), you have to use the date/time in the query object and the endperiod (the last parameter).
+     * @see QuerySettings in class OPimBase 
+     * @param query The object which contains the query set
+     * @param querySettings This parameter defines what should be searched and how the query should be interpreted
+     * @param endperiod Defines the end of a period for some special queries.    
+     */
+    virtual List queryByExample( const OPimRecord* query, int querySettings, const QDateTime& endperiod = QDateTime() );
+    /**
+     * Incremental query by example search interface. Providing incremental search, this one provides the feature 
+     * to search in a list of records which may be returned by an other search.
+     * "Query by Example" provides a very powerful search engine. Use the query object (this may be a contact, a todo or databook event) 
+     * as a search mask which is converted into a query regarding the querySettings. If a time period is needed 
+     * (as for OpimBase::DateDiff), you have to use the date/time in the query object and the endperiod (the last parameter).
+     * @see QuerySettings in class OPimBase 
+     * @param uidlist List of uid's which should be incorporated into the next search 
+     * @param query The object which contains the query set
+     * @param querySettings This parameter defines what should be searched and how the query should be interpreted
+     * @param endperiod Defines the end of a period for some special queries.    
+     */
+    virtual List queryByExample( const OPimAccessTemplate::List& uidlist, const T& query, int querySettings, 
+				 const QDateTime& endperiod = QDateTime() );
+
     virtual T find( UID uid )const;
     virtual T find( UID uid, const QArray<int>&,
 		    uint current, typename OTemplateBase<T>::CacheDirection dir = OTemplateBase<T>::Forward )const;
     //@}
 
     /** 
      * Get sorted lists..
      * @see OPimContactAccess, OPimTodoAccess and ODateBookAccess regarding more info for the following params:
      * @param list of UID's received by allRecords() or others...
      * @param sortOrder Setting the sort order defined by enum SortOrder
      * @param ascending Sort in ascending order if true, otherwise descending
      * @param sortFilter Setting the sort filter defined by enum SortFilter
      * @param cat number of category.
      */
     virtual List sorted( const List& list, bool ascending, int sortOrder,
 			 int sortFilter, int cat )const;
 
     /** 
      * Get sorted lists..
      * @see OPimContactAccess, OPimTodoAccess and ODateBookAccess regarding more info for the following params:
      * @param list of UID's received by allRecords() or others...
      * @param sortOrder Setting the sort order defined by enum SortOrder
      * @param ascending Sort in ascending order if true, otherwise descending
      * @param sortFilter Setting the sort filter defined by enum SortFilter
      * @param cats List of categories.
      */
     virtual List sorted( const List& list, bool ascending, int sortOrder,
 			 int sortFilter, const QArray<UID>& cats )const;
 
     /** 
      * Get sorted lists..
      * @see OPimContactAccess, OPimTodoAccess and ODateBookAccess regarding more info for the following params:
      * @param ascending Sort in ascending order if true, otherwise descending
      * @param sortOrder Setting the sort order defined by enum SortOrder
      * @param sortFilter Setting the sort filter defined by enum SortFilter
      * @param cat number of category.
      */
     virtual List sorted( bool ascending, int sortOrder, int sortFilter, int cat )const;
 
     /** 
      * Get sorted lists..
      * @see OPimContactAccess, OPimTodoAccess and ODateBookAccess regarding more info for the following params:
      * @param ascending Sort in ascending order if true, otherwise descending
      * @param sortOrder Setting the sort order defined by enum SortOrder
      * @param sortFilter Setting the sort filter defined by enum SortFilter
      * @param cats List of categories.
      */
     virtual List sorted( bool ascending, int sortOrder, int sortFilter,
 			 const QArray<UID>& cats )const;
     /**
      * (Re)Implementation
      */
     //@{
     UIDArray matchRegexpSimple( const QRegExp& r )const;
     UIDArray queryByExampleSimple( const OPimRecord*, int, const QDateTime& )const;
     UIDArray sortedSimple( const UIDArray&, bool asc, int sortOrder,
                            int sortFilter, int cat )const;
     UIDArray sortedSimple( const UIDArray&, bool asc, int sortOrder,
                            int sortFilter, const QArray<int>& )const;
     UIDArray sortedSimple( bool ascending, int sortOrder, int sortFilter,
                            int cat )const;
     UIDArray sortedSimple( bool ascending, int sortOrder, int sortFilter,
                            const QArray<int>& )const;
     OPimOccurrence::List occurrences( const QDate& start,  const QDate& end )const;
     OPimOccurrence::List occurrences( const QDateTime& dt )const;
     //@}
 
     //@{
     virtual bool add( const T& t ) ;
     bool add( const OPimRecord& );
     bool add( const OPimRecord* );
     virtual bool remove( const T& t );
     bool remove( UID uid );
     bool remove( const OPimRecord& );
     virtual bool replace( const T& t) ;
 
     //@}
 
     void setReadAhead( uint count );
     void cache( const T& )const;
     void setSaneCacheSize( int );
 
     QArray<UID> records()const;
 protected:
     /**
      * invalidate the cache
      */
     void invalidateCache();
 
     void setBackEnd( BackEnd* end );
     /**
      * returns the backend
      */
     BackEnd* backEnd();
     BackEnd* m_backEnd;
 
     Cache m_cache;
 
 private:
     OPimAccessTemplatePrivate *d;
 
 };
 
 /**
  * c'tor BackEnd
  * enum Access a small hint on how to handle the backend
  */
 template <class T>
 OPimAccessTemplate<T>::OPimAccessTemplate( BackEnd* end )
     : OTemplateBase<T>(), m_backEnd( end )
 {
     if (end )
         end->setFrontend( this );
 }
 template <class T>
 OPimAccessTemplate<T>::~OPimAccessTemplate() {
     delete m_backEnd;
 }
 
 /**
  * load from the backend
  */
 template <class T>
 bool OPimAccessTemplate<T>::load() {
     invalidateCache();
     return m_backEnd->load();
 }
 
 /** Reload database.
  * You should execute this function if the external database
  * was changed.
  * This function will load the external database and afterwards
  * rejoin the local changes. Therefore the local database will be set consistent.
  */
 template <class T>
 bool OPimAccessTemplate<T>::reload() {
     invalidateCache();
     return m_backEnd->reload();
 }
 
 /**
  * Save contacts database.
  * Save is more a "commit". After calling this function, all changes are public available.
  * @return true if successful
  */
 template <class T>
 bool OPimAccessTemplate<T>::save() {
     return m_backEnd->save();
 }
 
 
 /**
  * return a List of records
  * you can iterate over them
  */
 template <class T>
 typename OPimAccessTemplate<T>::List OPimAccessTemplate<T>::allRecords()const {
     QArray<int> ints = m_backEnd->allRecords();
     List lis(ints, this );
     return lis;
 }
 
 /**
  * return a List of records
  * that match the regex
  */
 template <class T>
 typename OPimAccessTemplate<T>::List OPimAccessTemplate<T>::matchRegexp( const QRegExp &r )const {
     QArray<int> ints = m_backEnd->matchRegexp( r );
     List lis(ints, this );
     return lis;
 }
 
 /**
  * find the OPimRecord uid
  */
 template <class T>
 QArray<int> OPimAccessTemplate<T>::records()const {
     return m_backEnd->allRecords();
 }
 
 
-/**
- * queryByExample.
- * @see otodoaccess, ocontactaccess
- */
 template <class T>
 typename OPimAccessTemplate<T>::List
 OPimAccessTemplate<T>::queryByExample( const T& t, int settings, const QDateTime& d ) {
     QArray<int> ints = m_backEnd->queryByExample( t, settings, d );
 
-    List lis(ints, this );
-    return lis;
+    List list(ints, this );
+    return list;
 }
 
 template <class T>
+typename OPimAccessTemplate<T>::List
+OPimAccessTemplate<T>::queryByExample( const OPimRecord* t, int settings, const QDateTime& d ) {
+    T tempInstance;
+
+    if ( t->rtti() == tempInstance.rtti() ) {
+	    QArray<int> ints = m_backEnd->queryByExample( t, settings, d );
+	    List list( ints, this );
+	    return list;
+    } else {
+	owarn << "Query not possible: Objecttype mismatch" << oendl;
+    } 
+
+    return List();
+}
+
+template <class T>
+typename OPimAccessTemplate<T>::List
+OPimAccessTemplate<T>::queryByExample( const OPimAccessTemplate::List& uidlist, const T& t, int settings, const QDateTime& d ) {
+    QArray<int> ints = m_backEnd->queryByExample( uidlist.uids(), t, settings, d );
+
+    List list( ints, this );
+    return list;
+}
+
+
+template <class T>
 T OPimAccessTemplate<T>::find( UID uid ) const{
     // First search in cache..
     if ( m_cache.contains( uid ) )
 	    return m_cache.find( uid );
 
     T t = m_backEnd->find( uid );
     cache( t );
 
     return t;
 }
 
 
 /**
  * read ahead cache find method ;)
  */
 template <class T>
 T OPimAccessTemplate<T>::find( UID uid, const QArray<int>& ar,
                                uint current, typename OTemplateBase<T>::CacheDirection dir )const {
     /*
      * better do T.isEmpty()
      * after a find this way we would
      * avoid two finds in QCache...
      */
     if (m_cache.contains( uid ) )
         return m_cache.find( uid );
 
 
     T t = m_backEnd->find( uid, ar, current, dir );
     cache( t );
     return t;
 }
 
 /**
  * clears the backend and invalidates the backend
  */
 template <class T>
 void OPimAccessTemplate<T>::clear() {
     invalidateCache();
     m_backEnd->clear();
 }
 
 
 /**
  * add T to the backend
  * @param t The item to add.
  * @return <i>true</i> if added successfully.
  */
 template <class T>
 bool OPimAccessTemplate<T>::add( const T& t ) {
     cache( t );
     return m_backEnd->add( t );
 }
 
 template <class T>
 bool OPimAccessTemplate<T>::add( const OPimRecord& rec ) {
     /* same type */
     T tempInstance;
     if ( rec.rtti() == tempInstance.rtti() ) {
         const T& t = static_cast<const T&>(rec);
         return add(t);
     } else {
 	owarn << "Adding not possible: Objecttype mismatch" << oendl;
     }
     return false;
 }
 
 /**
  * Add an Opie PimRecord.
  * Info: Take this if  you are working with OPimRecords and you need to add it into any database.
  *       But take care that the accessing database is compatible to the real type of OPimRecord !!
  *       Otherwise this access will be rejected !
  */
 template <class T>
 bool OPimAccessTemplate<T>::add( const OPimRecord* rec) {
     /* same type, but pointer  */
     T tempInstance;
     if ( rec -> rtti() == tempInstance.rtti() ) {
         const T* t = static_cast<const T*>(rec);
         return add( *t );
     } else {
 	owarn << "Adding not possible: Objecttype mismatch" << oendl;
     }
     return false;
 }
 
 /**
  * remove T from the backend
  * @param t The item to remove
  * @return <i>true</i> if successful.
  */
 template <class T>
 bool OPimAccessTemplate<T>::remove( const T& t ) {
     return remove( t.uid() );
 }
 
 /**
diff --git a/libopie2/opiepim/core/opimtemplatebase.h b/libopie2/opiepim/core/opimtemplatebase.h
index c8abab4..075e573 100644
--- a/libopie2/opiepim/core/opimtemplatebase.h
+++ b/libopie2/opiepim/core/opimtemplatebase.h
@@ -41,193 +41,193 @@
 
 namespace Opie {
 
 class OPimBasePrivate;
 
 /**
  * This is the base class for all our Interfaces to the
  * PIM Records. It is pointer based and can be used
  * generically for all types of Records.
  *
  */
 struct OPimBase {
     //@{
     OPimBase();
     virtual ~OPimBase();
     //@}
 
     //@{
     /**
      * return the rtti
      */
     virtual int rtti() const = 0;
     virtual OPimRecord* record()const = 0;
     virtual OPimRecord* record(int uid)const = 0;
     //@}
 
     //@{
     virtual bool add( const OPimRecord& ) = 0;
     virtual bool add( const OPimRecord* ) = 0;
 
     virtual bool remove( int uid ) = 0;
     virtual bool remove( const OPimRecord& ) = 0;
     //@}
 
     //@{
     virtual void clear() = 0;
     virtual bool load() = 0;
     virtual bool save() = 0;
     //@}
 
     //@{
     virtual QArray<UID> records()const = 0;
     //@}
 
     /** Constants for query.
      * Use this constants to set the query parameters.
      * Note: <i>query_IgnoreCase</i> just make sense with one of the other attributes !
      * @see queryByExample()
      */
     enum QuerySettings {
 	/** Use Wildcards */
         WildCards  = 0x0001,
 	/** Ignore the Case  */
         IgnoreCase = 0x0002,
 	/** Do a Regular Expression match */
         RegExp     = 0x0004, 
 	/** It needs to exactly match     */
         ExactMatch = 0x0008, 
 	/** Only one Entry must match */
         MatchOne   = 0x0010, 
 	/** Find all entries from today until given date */
         DateDiff   = 0x0020, 
 	/** The year matches */
         DateYear   = 0x0040, 
 	/** The month matches */
         DateMonth  = 0x0080, 
 	/** The day matches */
         DateDay    = 0x0100, 
 	/** The last possible name matches */
         LastItem   = 0xffff  
     };
 
     /**
      * Common Attributes for the Sort Order
      */
     enum SortOrderBase {
 	/** Sort by a Summary of the records */
         SortSummary = 0,
 	/** Sort by Category */
         SortByCategory = 1,
 	/** Sort by Date */
         SortByDate = 2, 
 	/** The First available sort number for the OPimAccessTemplates */
         SortCustom  = 10,
 	/** make this enum 16bit large */
         LastSortOrderBase = 0xffff 
     };
 
     /**
      * Sort a list of Items with the help of the sorted() function.
      * The Item you provide in SortOrder will be used
      * for sorting.
      *
      * @see OPimAccessTemplate<>::sorted()
      */
     enum SortFilterBase {
-	    /** Do not filter anything. */
+	/** Do not filter anything. */
 	FilterOff = 0,
 	/** Use given Categories for filter */
         FilterCategory = 1,
 	/** The first available custom filter defined in the specialized frontends */
         FilterCustom = 1024, 
         LastSortFilterBase = 0xffffffff
     };
 
     virtual UIDArray matchRegexpSimple( const QRegExp& r )const = 0;
     virtual UIDArray queryByExampleSimple( const OPimRecord*, int settings,
                                            const QDateTime& d = QDateTime() )const  = 0;
     virtual UIDArray sortedSimple( const UIDArray& uid, bool ascending,
                                    int sortOrder, int sortFilter, int cat)const = 0;
     virtual UIDArray sortedSimple( const UIDArray& uid, bool ascending,
                                    int sortOrder, int sortFilter, const QArray<UID>& cats )const = 0;
     virtual UIDArray sortedSimple( bool ascending, int sortOrder, int sortFilter, int cat)const = 0;
     virtual UIDArray sortedSimple( bool ascending, int sortOrder, int sortFilter, const QArray<UID>& cats )const = 0;
     virtual OPimOccurrence::List occurrences( const QDate& start,  const QDate& end )const = 0;
     virtual OPimOccurrence::List occurrences( const QDateTime& dt )const = 0;
     //@}
 
 
 protected:
     OPimOccurrence::List convertOccurrenceFromBackend( const OPimBackendOccurrence::List& )const;
 
 private:
     OPimBasePrivate* d;
 };
 
 
 /**
  * internal template base
  * Attention: T needs to implement the copy c'tor!!!
  */
 class OTemplateBasePrivate;
 template <class T = OPimRecord>
 class OTemplateBase : public OPimBase {
 public:
     /**
      * The Direction for ReadAhead/ReadBehind which will
      * be used by the backends to Cache Items in
      * advance.
      * For example if you know that you will access the
      * next ten items you can give the backend a hint
      * to read ahead or read before.
      */
     enum CacheDirection {
         Forward=0, /** Go forward   when caching (++ to the index) */
         Reverse    /** Go backward  when caching (-- to the index) */
     };
 
 
     //@{
     OTemplateBase() {};
     virtual ~OTemplateBase() {}
     //@}
 
 
     //@{
     virtual T find( int uid )const = 0;
 
     /**
      * read ahead find
      */
     virtual T find( int uid, const QArray<int>& items,
                     uint current, CacheDirection dir = Forward )const = 0;
     //@}
 
     //@{
    /**
     * Put element into Cache
     */
     virtual void cache( const T& )const = 0;
     virtual void setSaneCacheSize( int ) = 0;
 
     OPimRecord* record()const;
     OPimRecord* record(int uid )const;
     static T* rec();
     //@}
 
 private:
     OTemplateBasePrivate *d;
 };
 
 
 template <class T>
 OPimRecord* OTemplateBase<T>::record()const {
     T* t = new T;
     return t;
 }
 template <class T>
 OPimRecord* OTemplateBase<T>::record(int uid )const {
     T  t2 = find(uid );
     T* t1 = new T(t2);
 
     return t1;