Added some docu to the interface and now using the cache infrastucture by zecke.. :)

4 files changed, 55 insertions, 93 deletions

diff --git a/libopie2/opiepim/backend/ocontactaccessbackend_xml.h b/libopie2/opiepim/backend/ocontactaccessbackend_xml.h
index 50ea329..12a75ba 100644
--- a/libopie2/opiepim/backend/ocontactaccessbackend_xml.h
+++ b/libopie2/opiepim/backend/ocontactaccessbackend_xml.h
@@ -1,171 +1,182 @@
 /*
  * 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 1.4  2002/10/16 10:52:40  eilers
+ * Added some docu to the interface and now using the cache infrastucture by zecke.. :)
+ *
  * Revision 1.3  2002/10/14 16:21:54  eilers
  * Some minor interface updates
  *
  * 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 )
+	OContactAccessBackend_XML ( QString appname, QString filename = 0l ):
+		m_changed( false )
 		{
 			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() {
+
+		if ( !m_changed )
+			return true;
+
 		QString strNewFile = m_fileName + ".new";
 		QFile f( strNewFile );
 		if ( !f.open( IO_WriteOnly|IO_Raw ) )
 			return false;
 		
 		int total_written;
 		QString out;
 		out = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><!DOCTYPE Addressbook ><AddressBook>\n"
 			" <Groups>\n"
 			" </Groups>\n"
 			" <Contacts>\n";
 		//QValueList<Contact>::iterator it;
 		QValueListConstIterator<OContact> it;
 		for ( it = m_contactList.begin(); it != m_contactList.end(); ++it ) {
 			out += "<Contact ";
 			(*it).save( out );
 			out += "/>\n";
 			QCString cstr = out.utf8();
 			total_written = f.writeBlock( cstr.data(), cstr.length() );
 			if ( total_written != int(cstr.length()) ) {
 				f.close();
 				QFile::remove( strNewFile );
 				return false;
 			}
 			out = "";
 		}
 		out += " </Contacts>\n</AddressBook>\n";
 		
 		QCString cstr = out.utf8();
 		total_written = f.writeBlock( cstr.data(), cstr.length() );
 		if ( total_written != int( cstr.length() ) ) {
 			f.close();
 			QFile::remove( strNewFile );
 			return false;
 		}
 		f.close();
 		
 		// move the file over, I'm just going to use the system call
 		// because, I don't feel like using QDir.
 		if ( ::rename( strNewFile.latin1(), m_fileName.latin1() ) < 0 ) {
 			qWarning( "problem renaming file %s to %s, errno: %d",
 				  strNewFile.latin1(), m_journalName.latin1(), errno );
 			// remove the tmp file...
 			QFile::remove( strNewFile );
 		}
 		
 		/* The journalfile should be removed now... */
 		removeJournal();
+
+		m_changed = false;
 		return true;
 	}
 	
 	bool load () {
 		m_contactList.clear();
 		
 		/* Load XML-File and journal if it exists */
 		if ( !load ( m_fileName, false ) )
 			return false;
 		/* The returncode of the journalfile is ignored due to the
 		 * fact that it does not exist when this class is instantiated !
 		 * But there may such a file exist, if the application crashed.
 		 * Therefore we try to load it to get the changes before the #
 		 * crash happened...
 		 */
 		load (m_journalName, true);
 		
 		return true;
 	}
 
 	void clear () {
 		m_contactList.clear();
+		m_changed = false;
 
 	}
 	
 	bool wasChangedExternally()
 		{
 			QFileInfo fi( m_fileName );
 			
 			QDateTime lastmod = fi.lastModified ();
 			
 			return (lastmod != m_readtime);
 		}
 	
 	QArray<int> allRecords() const {
 		QArray<int> uid_list( m_contactList.count() );
 		
 		uint counter = 0; 
 		QValueListConstIterator<OContact> it;
 		for( it = m_contactList.begin(); it != m_contactList.end(); ++it ){
 			uid_list[counter++] = (*it).uid();
 		}
 		
 		return ( uid_list );
 	}
 	
@@ -254,73 +265,80 @@ class OContactAccessBackend_XML : public OContactAccessBackend {
 	
 	bool hasQuerySettings (uint querySettings) const
 		{
 			/* OContactAccess::IgnoreCase may be added with one
 			 * of the other settings, but never used alone.
 			 * The other settings are just valid alone...
 			 */
 			switch ( querySettings & ~OContactAccess::IgnoreCase ){
 			case OContactAccess::RegExp:
 				return ( true );
 			case OContactAccess::WildCards:
 				return ( true );
 			case OContactAccess::ExactMatch:
 				return ( true );
 			default:
 				return ( false );
 			}
 		}
 	
 	bool add ( const OContact &newcontact )
 		{
 			//qWarning("odefaultbackend: ACTION::ADD");
 			updateJournal (newcontact, OContact::ACTION_ADD);
 			addContact_p( newcontact );
+			
+			m_changed = true;
+
 			return true;
 		}
 	
 	bool replace ( const OContact &contact )
 		{
+			m_changed = true;
+
 			bool found = false;
 			
 			QValueListIterator<OContact> it;
 			for( it = m_contactList.begin(); it != m_contactList.end(); ++it ){
 				if ( (*it).uid() == contact.uid() ){
 					found = true;
 					break;
 				}
 			}
 			if (found) {
 				updateJournal (contact, OContact::ACTION_REPLACE);
 				m_contactList.remove (it);
 				m_contactList.append (contact);
 				return true;
 			} else
 				return false;
 		}
 	
 	bool remove ( int uid )
 		{
+			m_changed = true;
+
 			bool found = false;
 			QValueListIterator<OContact> it;
 			for( it = m_contactList.begin(); it != m_contactList.end(); ++it ){
 				if ((*it).uid() == uid){
 					found = true;
 					break;
 				}
 			}
 			if (found) {
 				updateJournal ( *it, OContact::ACTION_REMOVE);
 				m_contactList.remove (it);
 				return true;
 			} else
 				return false;
 		}
 	
 	bool reload(){
 		/* Reload is the same as load in this implementation */
 		return ( load() );
 	}
 	
  private:
 	void addContact_p( const OContact &newcontact ){
 		m_contactList.append (newcontact);
@@ -532,32 +550,33 @@ class OContactAccessBackend_XML : public OContactAccessBackend {
 		// get a XML-File which is readable by our parser.
 		// This is just a cheat, but better than rewrite the parser.
 		if ( created ){
 			buf = "<Contacts>";
 			QCString cstr = buf.utf8();
 			f.writeBlock( cstr.data(), cstr.length() );
 		}
 		
 		buf = "<Contact ";
 		cnt.save( buf );
 		buf += " action=\"" + QString::number( (int)action ) + "\" ";
 		buf += "/>\n";
 		QCString cstr = buf.utf8();
 		f.writeBlock( cstr.data(), cstr.length() );
 	}
 	
 	void removeJournal()
 		{
 			QFile f ( m_journalName );
 			if ( f.exists() )
 				f.remove();
 		}
 	
  protected:
+	bool m_changed;
 	QString m_journalName;
 	QString m_fileName;
 	QString m_appName;
 	QValueList<OContact> m_contactList;
 	QDateTime m_readtime;
 };
 
 #endif
diff --git a/libopie2/opiepim/core/ocontactaccess.cpp b/libopie2/opiepim/core/ocontactaccess.cpp
index e8c0a45..2ca0283 100644
--- a/libopie2/opiepim/core/ocontactaccess.cpp
+++ b/libopie2/opiepim/core/ocontactaccess.cpp
@@ -1,188 +1,153 @@
 /*
  * 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 1.5  2002/10/16 10:52:40  eilers
+ * Added some docu to the interface and now using the cache infrastucture by zecke.. :)
+ *
  * Revision 1.4  2002/10/14 16:21:54  eilers
  * Some minor interface updates
  *
  * 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 ,
 			 OContactAccessBackend* end, bool autosync ):
-	OPimAccessTemplate<OContact>( end ),
-	m_changed ( false )
+	OPimAccessTemplate<OContact>( end )
 {
         /* 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 ) {
 		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();
+	save();
 	// delete m_backEnd; is done by template..
 }
 
-bool OContactAccess::load()
-{
-	return ( m_backEnd->load() );
-}
 
 bool OContactAccess::save ()
 {
 	/* If the database was changed externally, we could not save the
 	 * Data. This will remove added items which is unacceptable !
 	 * Therefore: Reload database and merge the data...
 	 */
-	if ( m_backEnd->wasChangedExternally() )
+	if ( OPimAccessTemplate<OContact>::wasChangedExternally() )
 		reload();
 
-	if ( m_changed ){ 
-		bool status = m_backEnd->save();
-		if ( !status ) return false;
+	bool status = OPimAccessTemplate<OContact>::save();
+	if ( !status ) return false;
 
-		m_changed = false;
-		/* Now tell everyone that new data is available.
-		 */
-		QCopEnvelope e( "QPE/PIM", "addressbookUpdated()" );
-
-	}
+	/* Now tell everyone that new data is available.
+	 */
+	QCopEnvelope e( "QPE/PIM", "addressbookUpdated()" );
 
 	return true;
 }
 
 const uint OContactAccess::querySettings()
 {
 	return ( m_backEnd->querySettings() );
 }
 
 bool OContactAccess::hasQuerySettings ( int querySettings ) const
 {
 	return ( m_backEnd->hasQuerySettings ( querySettings ) );
 }
 
-bool OContactAccess::add ( const OContact& newcontact )
-{
-	m_changed = true;
-	return ( m_backEnd->add ( newcontact ) );
-}
-
-bool OContactAccess::replace ( const OContact& contact )
-{
-	m_changed = true;
-	return ( m_backEnd->replace ( contact ) );
-}
-
-bool OContactAccess::remove ( const OContact& t )
-{
-	m_changed = true;
-	return ( m_backEnd->remove ( t.uid() ) );
-}
-
-bool OContactAccess::remove ( int uid )
-{
-	m_changed = true;
-	return ( m_backEnd->remove ( uid ) );
-}
 
 bool OContactAccess::wasChangedExternally()const
 {
 	return ( m_backEnd->wasChangedExternally() );
 }
 
 
-bool OContactAccess::reload()
-{
-	return ( m_backEnd->reload() );
-}
-
 void OContactAccess::copMessage( const QCString &msg, const QByteArray & )
 {
 	if ( msg == "addressbookUpdated()" ){
 		qWarning ("OContactAccess: Received addressbokUpdated()");
 		emit signalChanged ( this );
 	} else if ( msg == "flush()" ) {
 		qWarning ("OContactAccess: Received flush()");
 		save ();
 	} else if ( msg == "reload()" ) {
 		qWarning ("OContactAccess: Received reload()");
 		reload ();
 		emit signalChanged ( this );
 	}
 }
diff --git a/libopie2/opiepim/core/ocontactaccess.h b/libopie2/opiepim/core/ocontactaccess.h
index adc66cf..da9c942 100644
--- a/libopie2/opiepim/core/ocontactaccess.h
+++ b/libopie2/opiepim/core/ocontactaccess.h
@@ -1,43 +1,46 @@
 /*
  * Class to manage the Contacts.
  *
  * 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 1.3  2002/10/16 10:52:40  eilers
+ * Added some docu to the interface and now using the cache infrastucture by zecke.. :)
+ *
  * Revision 1.2  2002/10/14 16:21:54  eilers
  * Some minor interface updates
  *
  * 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 _OCONTACTACCESS_H
 #define _OCONTACTACCESS_H
 
 #include <qobject.h>
 
 #include <qpe/qcopenvelope_qws.h>
 
 #include <qvaluelist.h>
 #include <qfileinfo.h>
 
 #include "ocontact.h"
 #include "ocontactaccessbackend.h"
 #include "opimaccesstemplate.h"
@@ -70,99 +73,59 @@ class OContactAccess: public QObject, public OPimAccessTemplate<OContact>
 
 	/** 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 {
 		WildCards  = 0x0001,
 		IgnoreCase = 0x0002,
 		RegExp     = 0x0004,
 		ExactMatch = 0x0008,
 	};
 
 	/** Return all possible settings.
 	 *  @return All settings provided by the current backend
 	 * (i.e.: query_WildCards & query_IgnoreCase)
 	 */
 	const uint querySettings();
 
 	/** Check whether settings are correct.
 	 * @return <i>true</i> if the given settings are correct and possible.
 	 */
 	bool hasQuerySettings ( int querySettings ) const;
 
-	/** Add Contact to database.
-	 * @param newcontact The contact to add.
-	 * @return <i>true</i> if added successfully.
-	 */
-	bool add (const OContact& newcontact);
-
-	/** Replace contact.
-	 * Replaces given contact with contact with the user id <i>uid</i>.
-	 * @param uid The user ID
-	 * @param contact The new contact
-	 * @return <i>true</i> if successful.
-	 */
-	bool replace ( const OContact& contact );
-
-	/** Remove contact.
-	 * Removes contact with the user id <i>uid</i>.
-	 * @param The contact to remove
-	 * @return <i>true</i> if successful.
-	 */
-	bool remove ( const OContact& t );
-
-	/** Remove contact.
-	 * Removes contact with the user id <i>uid</i>.
-	 * @param The user id of the contact to remove
-	 * @return <i>true</i> if successful.
-	 */
-	bool remove ( int uid );
-
-	/** Load Database *
-	 */
-	bool load();
-	
 	/**
 	 * if the resource was changed externally.
 	 * You should use the signal instead of polling possible changes !
 	 */
 	bool wasChangedExternally()const;
 
-	/** 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.
-	 */
-	bool reload();
 
 	/** Save contacts database.
 	 * Save is more a "commit". After calling this function, all changes are public available.
 	 * @return true if successful
 	 */
 	bool save();
 
  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 OContactAccess *which );
 
 
  private:
 	// class OContactAccessPrivate;
 	// OContactAccessPrivate* d;
         OContactAccessBackend *m_backEnd;
         bool m_loading:1;
-	bool m_changed;
 
  private slots:
 	void copMessage( const QCString &msg, const QByteArray &data );
 
 
 };
 #endif
diff --git a/libopie2/opiepim/core/opimaccesstemplate.h b/libopie2/opiepim/core/opimaccesstemplate.h
index 3e1f393..50cb1e4 100644
--- a/libopie2/opiepim/core/opimaccesstemplate.h
+++ b/libopie2/opiepim/core/opimaccesstemplate.h
@@ -16,154 +16,169 @@
  * interface or you want to implement
  * your own Access lib
  * Just create a OPimRecord and inherit from
  * the plugins
  */
 
 template <class T = OPimRecord >
 class OPimAccessTemplate : public OTemplateBase<T> {
 public:
     typedef ORecordList<T> List;
     typedef OPimAccessBackend<T> BackEnd;
     typedef OPimCache<T> Cache;
 
     /**
      * c'tor BackEnd
      */
     OPimAccessTemplate( BackEnd* end);
     virtual ~OPimAccessTemplate();
 
     /**
      * load from the backend
      */
     virtual bool load();
 
-    /**
-     * reload from the backend
+    /** 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.
      */
     virtual bool reload();
 
-    /**
-     * save to the backend
+    /** Save contacts database.
+     * Save is more a "commit". After calling this function, all changes are public available.
+     * @return true if successful
      */
     virtual bool save();
 
     /**
      * if the resource was changed externally
+     * You should use the signal handling instead of polling possible changes !
+     * zecke: Do you implement a signal for otodoaccess ?
      */
     bool wasChangedExternally()const;
 
     /**
      * return a List of records
      * you can iterate over them
      */
     virtual List allRecords()const;
 
     /**
-     * queryByExample)
+     * queryByExample. 
      * @see otodoaccess, ocontactaccess
      */
     virtual List queryByExample( const T& t, int querySettings );
 
     /**
      * find the OPimRecord uid
      */
     virtual T find( int uid )const;
 
     /**
      * read ahead cache find method ;)
      */
     virtual T find( int uid, const QArray<int>&,
                     uint current, CacheDirection dir = Forward )const;
 
     /* invalidate cache here */
     /**
      * clears the backend and invalidates the backend
      */
     virtual void clear() ;
 
     /**
      * add T to the backend
+     * @param t The item to add.
+     * @return <i>true</i> if added successfully.
      */
     virtual bool add( const T& t ) ;
 
     /* only the uid matters */
     /**
      * remove T from the backend
+     * @param t The item to remove
+     * @return <i>true</i> if successful.
      */
     virtual bool remove( const T& t );
 
     /**
      * remove the OPimRecord with uid
+     * @param uid The ID of the item to remove
+     * @return <i>true</i> if successful.
      */
     virtual bool remove( int uid );
 
     /**
      * replace T from backend
+     * @param t The item to replace
+     * @return <i>true</i> if successful.
      */
     virtual bool replace( const T& t) ;
 
     /**
      * @internal
      */
     void cache( const T& )const;
     void setSaneCacheSize( int );
 protected:
     /**
      * invalidate the cache
      */
     void invalidateCache();
 
     void setBackEnd( BackEnd* end );
     /**
      * returns the backend
      */
     BackEnd* backEnd();
     BackEnd* m_backEnd;
     Cache m_cache;
 
 };
 
 template <class T>
 OPimAccessTemplate<T>::OPimAccessTemplate( BackEnd* end )
     : OTemplateBase<T>(), m_backEnd( end )
 {
     if (end )
         end->setFrontend( this );
 }
 template <class T>
 OPimAccessTemplate<T>::~OPimAccessTemplate() {
     qWarning("~OPimAccessTemplate<T>");
     delete m_backEnd;
 }
 template <class T>
 bool OPimAccessTemplate<T>::load() {
     invalidateCache();
     return m_backEnd->load();
 }
 template <class T>
 bool OPimAccessTemplate<T>::reload() {
-    return m_backEnd->reload();
+	invalidateCache();  // zecke: I think this should be added (se)
+	return m_backEnd->reload();
 }
 template <class T>
 bool OPimAccessTemplate<T>::save() {
     return m_backEnd->save();
 }
 template <class T>
 OPimAccessTemplate<T>::List OPimAccessTemplate<T>::allRecords()const {
     QArray<int> ints = m_backEnd->allRecords();
     List lis(ints, this );
     return lis;
 }
 template <class T>
 OPimAccessTemplate<T>::List
 OPimAccessTemplate<T>::queryByExample( const T& t, int sortOrder ) {
     QArray<int> ints = m_backEnd->queryByExample( t, sortOrder );
 
     List lis(ints, this );
     return lis;
 }
 template <class T>
 T OPimAccessTemplate<T>::find( int uid ) const{
     T t = m_backEnd->find( uid );
     cache( t );
     return t;