kexi

migratemanager.cpp

00001 /* This file is part of the KDE project
00002    Daniel Molkentin <molkentin@kde.org>
00003    Joseph Wenninger <jowenn@kde.org>
00004    Copyright (C) 2003-2004 Jaroslaw Staniek <js@iidea.pl>
00005 
00006    This program is free software; you can redistribute it and/or
00007    modify it under the terms of the GNU Library General Public
00008    License as published by the Free Software Foundation; either
00009    version 2 of the License, or (at your option) any later version.
00010 
00011    This program is distributed in the hope that it will be useful,
00012    but WITHOUT ANY WARRANTY; without even the implied warranty of
00013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014    Library General Public License for more details.
00015 
00016    You should have received a copy of the GNU Library General Public License
00017    along with this program; see the file COPYING.  If not, write to
00018    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00019  * Boston, MA 02110-1301, USA.
00020 */
00021 
00022 #include "migratemanager.h"
00023 #include "migratemanager_p.h"
00024 #include "keximigrate.h"
00025 
00026 #include <klibloader.h>
00027 #include <kparts/componentfactory.h>
00028 #include <ktrader.h>
00029 #include <kdebug.h>
00030 #include <klocale.h>
00031 #include <kservice.h>
00032 
00033 #include <assert.h>
00034 
00035 #include <qapplication.h>
00036 
00037 //remove debug
00038 #undef KexiDBDbg
00039 #define KexiDBDbg if (0) kdDebug()
00040 
00041 using namespace KexiMigration;
00042 
00043 MigrateManagerInternal* MigrateManagerInternal::s_self = 0L;
00044 
00050 MigrateManager __manager;
00051 
00052 MigrateManagerInternal::MigrateManagerInternal() /* protected */
00053     : QObject( 0, "KexiMigrate::MigrateManagerInternal" )
00054     , Object()
00055     , m_drivers(17, false)
00056     , m_refCount(0)
00057     , lookupDriversNeeded(true)
00058 {
00059     m_drivers.setAutoDelete(true);
00060     m_serverResultNum=0;
00061 
00062 }
00063 
00064 MigrateManagerInternal::~MigrateManagerInternal()
00065 {
00066     KexiDBDbg << "MigrateManagerInternal::~MigrateManagerInternal()" << endl;
00067     m_drivers.clear();
00068     if ( s_self == this )
00069         s_self = 0;
00070     KexiDBDbg << "MigrateManagerInternal::~MigrateManagerInternal() ok" << endl;
00071 }
00072 
00073 void MigrateManagerInternal::slotAppQuits()
00074 {
00075     if (qApp->mainWidget() && qApp->mainWidget()->isVisible())
00076         return; //what a hack! - we give up when app is still there
00077     KexiDBDbg << "MigrateManagerInternal::slotAppQuits(): let's clear drivers..." << endl;
00078     m_drivers.clear();
00079 }
00080 
00081 MigrateManagerInternal *MigrateManagerInternal::self()
00082 {
00083     if (!s_self)
00084         s_self = new MigrateManagerInternal();
00085 
00086     return s_self;
00087 }
00088 
00089 bool MigrateManagerInternal::lookupDrivers()
00090 {
00091     if (!lookupDriversNeeded)
00092         return true;
00093 
00094     if (qApp) {
00095         connect(qApp,SIGNAL(aboutToQuit()),this,SLOT(slotAppQuits()));
00096     }
00097 //TODO: for QT-only version check for KInstance wrapper
00098 //      KexiDBWarn << "DriverManagerInternal::lookupDrivers(): cannot work without KInstance (KGlobal::instance()==0)!" << endl;
00099 //      setError("Driver Manager cannot work without KInstance (KGlobal::instance()==0)!");
00100 
00101     lookupDriversNeeded = false;
00102     clearError();
00103     KTrader::OfferList tlist = KTrader::self()->query("Kexi/MigrationDriver");
00104     KTrader::OfferList::ConstIterator it(tlist.constBegin());
00105     for(; it != tlist.constEnd(); ++it)
00106     {
00107         KService::Ptr ptr = (*it);
00108         QString srv_name = ptr->property("X-Kexi-MigrationDriverName").toString();
00109         if (srv_name.isEmpty()) {
00110             KexiDBWarn << "MigrateManagerInternal::lookupDrivers(): "
00111                 "X-Kexi-MigrationDriverName must be set for migration driver \"" 
00112                 << ptr->property("Name").toString() << "\" service!\n -- skipped!" << endl;
00113             continue;
00114         }
00115         if (m_services_lcase.contains(srv_name.lower())) {
00116             continue;
00117         }
00118 
00120 //<COPIED>
00121         QString srv_ver_str = ptr->property("X-Kexi-KexiMigrationVersion").toString();
00122         QStringList lst( QStringList::split(".", srv_ver_str) );
00123         int minor_ver, major_ver;
00124         bool ok = (lst.count() == 2);
00125         if (ok)
00126             major_ver = lst[0].toUInt(&ok);
00127         if (ok)
00128             minor_ver = lst[1].toUInt(&ok);
00129         if (!ok) {
00130             KexiDBWarn << "MigrateManagerInternal::lookupDrivers(): problem with detecting '"
00131             << srv_name.lower() << "' driver's version -- skipping it!" << endl;
00132             possibleProblems += QString("\"%1\" migration driver has unrecognized version; "
00133                 "required driver version is \"%2.%3\"")
00134                 .arg(srv_name.lower())
00135                 .arg(KexiMigration::versionMajor()).arg(KexiMigration::versionMinor());
00136             continue;
00137         }
00138         if (major_ver != KexiMigration::versionMajor() || minor_ver != KexiMigration::versionMinor()) {
00139             KexiDBWarn << QString("MigrateManagerInternal::lookupDrivers(): '%1' driver" 
00140                 " has version '%2' but required migration driver version is '%3.%4'\n"
00141                 " -- skipping this driver!").arg(srv_name.lower()).arg(srv_ver_str)
00142                 .arg(KexiMigration::versionMajor()).arg(KexiMigration::versionMinor()) << endl;
00143             possibleProblems += QString("\"%1\" migration driver has version \"%2\" "
00144                 "but required driver version is \"%3.%4\"")
00145                 .arg(srv_name.lower()).arg(srv_ver_str)
00146                 .arg(KexiMigration::versionMajor()).arg(KexiMigration::versionMinor());
00147             continue;
00148         }
00149 //</COPIED>
00150 
00151         QString mime = ptr->property("X-Kexi-FileDBDriverMime").toString().lower();
00152         QString drvType = ptr->property("X-Kexi-MigrationDriverType").toString().lower();
00153         if (drvType=="file") {
00154             if (!mime.isEmpty()) {
00155                 if (!m_services_by_mimetype.contains(mime)) {
00156                     m_services_by_mimetype.insert(mime, ptr);
00157                 }
00158                 else {
00159                     KexiDBWarn << "MigrateManagerInternal::lookupDrivers(): more than one driver for '" 
00160                         << mime << "' mime type!" << endl;
00161                 }
00162             }
00163         }
00164         m_services.insert(srv_name, ptr);
00165         m_services_lcase.insert(srv_name.lower(), ptr);
00166         KexiDBDbg << "MigrateManager::lookupDrivers(): registered driver: " << ptr->name() 
00167             << "(" << ptr->library() << ")" << endl;
00168     }
00169 
00170     if (tlist.isEmpty())
00171     {
00172         setError(ERR_DRIVERMANAGER, i18n("Could not find any import/export database drivers.") );
00173         return false;
00174     }
00175     return true;
00176 }
00177 
00178 KexiMigrate* MigrateManagerInternal::driver(const QString& name)
00179 {
00180     if (!lookupDrivers())
00181         return 0;
00182     
00183     clearError();
00184     KexiDBDbg << "MigrationrManagerInternal::migrationDriver(): loading " << name << endl;
00185 
00186     KexiMigrate *drv = name.isEmpty() ? 0 : m_drivers.find(name.latin1());
00187     if (drv)
00188         return drv; //cached
00189 
00190     if (!m_services_lcase.contains(name.lower())) {
00191         setError(ERR_DRIVERMANAGER, i18n("Could not find import/export database driver \"%1\".").arg(name) );
00192         return 0;
00193     }
00194 
00195     KService::Ptr ptr= *(m_services_lcase.find(name.lower()));
00196     QString srv_name = ptr->property("X-Kexi-MigrationDriverName").toString();
00197 
00198     KexiDBDbg << "MigrateManagerInternal::driver(): library: "<<ptr->library()<<endl;
00199     drv = KParts::ComponentFactory::createInstanceFromService<KexiMigrate>(ptr,
00200         this, srv_name.latin1(), QStringList(),&m_serverResultNum);
00201 
00202     if (!drv) {
00203         setError(ERR_DRIVERMANAGER, i18n("Could not load import/export database driver \"%1\".")
00204                 .arg(name) );
00205         if (m_componentLoadingErrors.isEmpty()) {//fill errtable on demand
00206             m_componentLoadingErrors[KParts::ComponentFactory::ErrNoServiceFound]="ErrNoServiceFound";
00207             m_componentLoadingErrors[KParts::ComponentFactory::ErrServiceProvidesNoLibrary]="ErrServiceProvidesNoLibrary";
00208             m_componentLoadingErrors[KParts::ComponentFactory::ErrNoLibrary]="ErrNoLibrary";
00209             m_componentLoadingErrors[KParts::ComponentFactory::ErrNoFactory]="ErrNoFactory";
00210             m_componentLoadingErrors[KParts::ComponentFactory::ErrNoComponent]="ErrNoComponent";
00211         }
00212         m_serverResultName=m_componentLoadingErrors[m_serverResultNum];
00213         return 0;
00214     }
00215     KexiDBDbg << "MigrateManagerInternal::driver(): loading succeed: " << name <<endl;
00216     KexiDBDbg << "drv="<<(long)drv <<endl;
00217 
00218 //  drv->setName(srv_name.latin1());
00219 //  drv->d->service = ptr; //store info
00220 //  drv->d->fileDBDriverMimeType = ptr->property("X-Kexi-FileDBDriverMime").toString();
00221 //  drv->d->initInternalProperties();
00222 
00223     if (!drv->isValid()) {
00224         setError(drv);
00225         delete drv;
00226         return 0;
00227     }
00228 
00229     m_drivers.insert(name.latin1(), drv); //cache it
00230     return drv;
00231 }
00232 
00233 void MigrateManagerInternal::incRefCount()
00234 {
00235     m_refCount++;
00236     KexiDBDbg << "MigrateManagerInternal::incRefCount(): " << m_refCount << endl;
00237 }
00238 
00239 void MigrateManagerInternal::decRefCount()
00240 {
00241     m_refCount--;
00242     KexiDBDbg << "MigrateManagerInternal::decRefCount(): " << m_refCount << endl;
00243 //  if (m_refCount<1) {
00244 //      KexiDBDbg<<"KexiDB::DriverManagerInternal::decRefCount(): reached m_refCount<1 -->deletelater()"<<endl;
00245 //      s_self=0;
00246 //      deleteLater();
00247 //  }
00248 }
00249 
00250 // ---------------------------
00251 // --- DriverManager impl. ---
00252 // ---------------------------
00253 
00254 MigrateManager::MigrateManager()
00255     : QObject( 0, "KexiMigrate::MigrateManager" )
00256     , Object()
00257     , d_int( MigrateManagerInternal::self() )
00258 {
00259     d_int->incRefCount();
00260 //  if ( !s_self )
00261 //      s_self = this;
00262 //  lookupDrivers();
00263 }
00264 
00265 MigrateManager::~MigrateManager()
00266 {
00267     KexiDBDbg << "MigrateManager::~MigrateManager()" << endl;
00268 /*  Connection *conn;
00269     for ( conn = m_connections.first(); conn ; conn = m_connections.next() ) {
00270         conn->disconnect();
00271         conn->m_driver = 0; //don't let the connection touch our driver now
00272         m_connections.remove();
00273         delete conn;
00274     }*/
00275 
00276     d_int->decRefCount();
00277     if (d_int->m_refCount==0) {
00278         //delete internal drv manager!
00279         delete d_int;
00280     }
00281 //  if ( s_self == this )
00282         //s_self = 0;
00283     KexiDBDbg << "MigrateManager::~MigrateManager() ok" << endl;
00284 }
00285 
00286 
00287 const QStringList MigrateManager::driverNames()
00288 {
00289     if (!d_int->lookupDrivers()) {
00290         kdDebug() << "MigrateManager::driverNames() lookupDrivers failed" << endl;
00291         return QStringList();
00292     }
00293     
00294     if (d_int->m_services.isEmpty()) {
00295         kdDebug() << "MigrateManager::driverNames() MigrateManager::ServicesMap is empty" << endl;
00296         return QStringList();
00297     }
00298 
00299     if (d_int->error()) {
00300         kdDebug() << "MigrateManager::driverNames() Error: " << d_int->errorMsg() << endl;
00301         return QStringList();
00302     }
00303 
00304     return d_int->m_services.keys();
00305 }
00306 
00307 QString MigrateManager::driverForMimeType(const QString &mimeType)
00308 {
00309     if (!d_int->lookupDrivers()) {
00310         kdDebug() << "MigrateManager::driverForMimeType() lookupDrivers() failed" << endl;
00311         setError(d_int);
00312         return 0;
00313     }
00314     
00315     KService::Ptr ptr = d_int->m_services_by_mimetype[mimeType.lower()];
00316     if (!ptr) {
00317         kdDebug() << QString("MigrateManager::driverForMimeType(%1) No such mimetype").arg(mimeType) << endl;
00318         return QString::null;
00319     }
00320 
00321     return ptr->property("X-Kexi-MigrationDriverName").toString();
00322 }
00323 
00324 KexiMigrate* MigrateManager::driver(const QString& name)
00325 {
00326     KexiMigrate *drv = d_int->driver(name);
00327     if (d_int->error()) {
00328         kdDebug() << QString("MigrateManager::driver(%1) Error: %2").arg(name).arg(d_int->errorMsg()) << endl;
00329         setError(d_int);
00330     }
00331     return drv;
00332 }
00333 
00334 QString MigrateManager::serverErrorMsg()
00335 {
00336     return d_int->m_serverErrMsg;
00337 }
00338 
00339 int MigrateManager::serverResult()
00340 {
00341     return d_int->m_serverResultNum;
00342 }
00343 
00344 QString MigrateManager::serverResultName()
00345 {
00346     return d_int->m_serverResultName;
00347 }
00348 
00349 void MigrateManager::drv_clearServerResult()
00350 {
00351     d_int->m_serverErrMsg=QString::null;
00352     d_int->m_serverResultNum=0;
00353     d_int->m_serverResultName=QString::null;
00354 }
00355 
00356 QString MigrateManager::possibleProblemsInfoMsg() const
00357 {
00358     if (d_int->possibleProblems.isEmpty())
00359         return QString::null;
00360     QString str;
00361     str.reserve(1024);
00362     str = "<ul>";
00363     for (QStringList::ConstIterator it = d_int->possibleProblems.constBegin();
00364         it!=d_int->possibleProblems.constEnd(); ++it)
00365     {
00366         str += (QString::fromLatin1("<li>") + *it + QString::fromLatin1("</li>"));
00367     }
00368     str += "</ul>";
00369     return str;
00370 }
00371 
00372 //------------------------
00373 
00374 int KexiMigration::versionMajor()
00375 {
00376     return KEXI_MIGRATION_VERSION_MAJOR;
00377 }
00378 
00379 int KexiMigration::versionMinor()
00380 {
00381     return KEXI_MIGRATION_VERSION_MINOR;
00382 }
00383 
00384 #include "migratemanager_p.moc"
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