LCOV - app.info - rdf/datasource/src/nsLocalStore.cpp

LCOV - code coverage report
| Current view: | directory - rdf/datasource/src - nsLocalStore.cpp (source / functions) |  | Found | Hit | Coverage |
| Test: | app.info | Lines: | 180 | 3 | 1.7 %
| Date: | 2012-04-21 | Functions: | 48 | 3 | 6.2 %

           1                 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
           2                 : /* vim: set cindent tabstop=4 expandtab shiftwidth=4: */
           3                 : /* ***** BEGIN LICENSE BLOCK *****
           4                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
           5                 :  *
           6                 :  * The contents of this file are subject to the Mozilla Public License Version
           7                 :  * 1.1 (the "License"); you may not use this file except in compliance with
           8                 :  * the License. You may obtain a copy of the License at
           9                 :  * http://www.mozilla.org/MPL/
          10                 :  *
          11                 :  * Software distributed under the License is distributed on an "AS IS" basis,
          12                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
          13                 :  * for the specific language governing rights and limitations under the
          14                 :  * License.
          15                 :  *
          16                 :  * The Original Code is mozilla.org code.
          17                 :  *
          18                 :  * The Initial Developer of the Original Code is
          19                 :  * Netscape Communications Corporation.
          20                 :  * Portions created by the Initial Developer are Copyright (C) 1998
          21                 :  * the Initial Developer. All Rights Reserved.
          22                 :  *
          23                 :  * Contributor(s):
          24                 :  *   Pierre Phaneuf <pp@ludusdesign.com>
          25                 :  *
          26                 :  * Alternatively, the contents of this file may be used under the terms of
          27                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
          28                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
          29                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
          30                 :  * of those above. If you wish to allow use of your version of this file only
          31                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
          32                 :  * use your version of this file under the terms of the MPL, indicate your
          33                 :  * decision by deleting the provisions above and replace them with the notice
          34                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
          35                 :  * the provisions above, a recipient may use your version of this file under
          36                 :  * the terms of any one of the MPL, the GPL or the LGPL.
          37                 :  *
          38                 :  * ***** END LICENSE BLOCK ***** */
          39                 :
          40                 : /*
          41                 :
          42                 :   Implementation for the local store
          43                 :
          44                 :  */
          45                 :
          46                 : #include "nsNetUtil.h"
          47                 : #include "nsIURI.h"
          48                 : #include "nsIIOService.h"
          49                 : #include "nsIOutputStream.h"
          50                 : #include "nsIComponentManager.h"
          51                 : #include "nsILocalStore.h"
          52                 : #include "nsIRDFDataSource.h"
          53                 : #include "nsIRDFRemoteDataSource.h"
          54                 : #include "nsIRDFService.h"
          55                 : #include "nsIServiceManager.h"
          56                 : #include "nsRDFCID.h"
          57                 : #include "nsXPIDLString.h"
          58                 : #include "plstr.h"
          59                 : #include "rdf.h"
          60                 : #include "nsCOMPtr.h"
          61                 : #include "nsWeakPtr.h"
          62                 : #include "nsAppDirectoryServiceDefs.h"
          63                 : #include "nsIObserver.h"
          64                 : #include "nsIObserverService.h"
          65                 : #include "nsWeakReference.h"
          66                 : #include "nsCRTGlue.h"
          67                 : #include "nsCRT.h"
          68                 : #include "nsEnumeratorUtils.h"
          69                 : #include "nsCycleCollectionParticipant.h"
          70                 :
          71                 : ////////////////////////////////////////////////////////////////////////
          72                 :
          73                 : class LocalStoreImpl : public nsILocalStore,
          74                 :                        public nsIRDFDataSource,
          75                 :                        public nsIRDFRemoteDataSource,
          76                 :                        public nsIObserver,
          77                 :                        public nsSupportsWeakReference
          78                 : {
          79                 : protected:
          80                 :     nsCOMPtr<nsIRDFDataSource> mInner;
          81                 :
          82                 :     LocalStoreImpl();
          83                 :     virtual ~LocalStoreImpl();
          84                 :     nsresult Init();
          85                 :     nsresult CreateLocalStore(nsIFile* aFile);
          86                 :     nsresult LoadData();
          87                 :
          88                 :     friend nsresult
          89                 :     NS_NewLocalStore(nsISupports* aOuter, REFNSIID aIID, void** aResult);
          90                 :
          91                 :     nsCOMPtr<nsIRDFService>    mRDFService;
          92                 :
          93                 : public:
          94                 :     // nsISupports interface
          95               0 :     NS_DECL_CYCLE_COLLECTING_ISUPPORTS
          96            1396 :     NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(LocalStoreImpl, nsILocalStore)
          97                 :
          98                 :     // nsILocalStore interface
          99                 :
         100                 :     // nsIRDFDataSource interface. Most of these are just delegated to
         101                 :     // the inner, in-memory datasource.
         102                 :     NS_IMETHOD GetURI(char* *aURI);
         103                 :
         104               0 :     NS_IMETHOD GetSource(nsIRDFResource* aProperty,
         105                 :                          nsIRDFNode* aTarget,
         106                 :                          bool aTruthValue,
         107                 :                          nsIRDFResource** aSource) {
         108               0 :         return mInner->GetSource(aProperty, aTarget, aTruthValue, aSource);
         109                 :     }
         110                 :
         111               0 :     NS_IMETHOD GetSources(nsIRDFResource* aProperty,
         112                 :                           nsIRDFNode* aTarget,
         113                 :                           bool aTruthValue,
         114                 :                           nsISimpleEnumerator** aSources) {
         115               0 :         return mInner->GetSources(aProperty, aTarget, aTruthValue, aSources);
         116                 :     }
         117                 :
         118               0 :     NS_IMETHOD GetTarget(nsIRDFResource* aSource,
         119                 :                          nsIRDFResource* aProperty,
         120                 :                          bool aTruthValue,
         121                 :                          nsIRDFNode** aTarget) {
         122               0 :         return mInner->GetTarget(aSource, aProperty, aTruthValue, aTarget);
         123                 :     }
         124                 :
         125               0 :     NS_IMETHOD GetTargets(nsIRDFResource* aSource,
         126                 :                           nsIRDFResource* aProperty,
         127                 :                           bool aTruthValue,
         128                 :                           nsISimpleEnumerator** aTargets) {
         129               0 :         return mInner->GetTargets(aSource, aProperty, aTruthValue, aTargets);
         130                 :     }
         131                 :
         132               0 :     NS_IMETHOD Assert(nsIRDFResource* aSource,
         133                 :                       nsIRDFResource* aProperty,
         134                 :                       nsIRDFNode* aTarget,
         135                 :                       bool aTruthValue) {
         136               0 :         return mInner->Assert(aSource, aProperty, aTarget, aTruthValue);
         137                 :     }
         138                 :
         139               0 :     NS_IMETHOD Unassert(nsIRDFResource* aSource,
         140                 :                         nsIRDFResource* aProperty,
         141                 :                         nsIRDFNode* aTarget) {
         142               0 :         return mInner->Unassert(aSource, aProperty, aTarget);
         143                 :     }
         144                 :
         145               0 :     NS_IMETHOD Change(nsIRDFResource* aSource,
         146                 :                       nsIRDFResource* aProperty,
         147                 :                       nsIRDFNode* aOldTarget,
         148                 :                       nsIRDFNode* aNewTarget) {
         149               0 :         return mInner->Change(aSource, aProperty, aOldTarget, aNewTarget);
         150                 :     }
         151                 :
         152               0 :     NS_IMETHOD Move(nsIRDFResource* aOldSource,
         153                 :                     nsIRDFResource* aNewSource,
         154                 :                     nsIRDFResource* aProperty,
         155                 :                     nsIRDFNode* aTarget) {
         156               0 :         return mInner->Move(aOldSource, aNewSource, aProperty, aTarget);
         157                 :     }
         158                 :
         159               0 :     NS_IMETHOD HasAssertion(nsIRDFResource* aSource,
         160                 :                             nsIRDFResource* aProperty,
         161                 :                             nsIRDFNode* aTarget,
         162                 :                             bool aTruthValue,
         163                 :                             bool* hasAssertion) {
         164               0 :         return mInner->HasAssertion(aSource, aProperty, aTarget, aTruthValue, hasAssertion);
         165                 :     }
         166                 :
         167               0 :     NS_IMETHOD AddObserver(nsIRDFObserver* aObserver) {
         168               0 :         return NS_ERROR_NOT_IMPLEMENTED;
         169                 :     }
         170                 :
         171               0 :     NS_IMETHOD RemoveObserver(nsIRDFObserver* aObserver) {
         172               0 :         return NS_ERROR_NOT_IMPLEMENTED;
         173                 :     }
         174                 :
         175               0 :     NS_IMETHOD HasArcIn(nsIRDFNode *aNode, nsIRDFResource *aArc, bool *_retval) {
         176               0 :         return mInner->HasArcIn(aNode, aArc, _retval);
         177                 :     }
         178                 :
         179               0 :     NS_IMETHOD HasArcOut(nsIRDFResource *aSource, nsIRDFResource *aArc, bool *_retval) {
         180               0 :         return mInner->HasArcOut(aSource, aArc, _retval);
         181                 :     }
         182                 :
         183               0 :     NS_IMETHOD ArcLabelsIn(nsIRDFNode* aNode,
         184                 :                            nsISimpleEnumerator** aLabels) {
         185               0 :         return mInner->ArcLabelsIn(aNode, aLabels);
         186                 :     }
         187                 :
         188               0 :     NS_IMETHOD ArcLabelsOut(nsIRDFResource* aSource,
         189                 :                             nsISimpleEnumerator** aLabels) {
         190               0 :         return mInner->ArcLabelsOut(aSource, aLabels);
         191                 :     }
         192                 :
         193               0 :     NS_IMETHOD GetAllResources(nsISimpleEnumerator** aResult) {
         194               0 :         return mInner->GetAllResources(aResult);
         195                 :     }
         196                 :
         197                 :     NS_IMETHOD GetAllCmds(nsIRDFResource* aSource,
         198                 :                               nsISimpleEnumerator/*<nsIRDFResource>*/** aCommands);
         199                 :
         200                 :     NS_IMETHOD IsCommandEnabled(nsISupportsArray/*<nsIRDFResource>*/* aSources,
         201                 :                                 nsIRDFResource*   aCommand,
         202                 :                                 nsISupportsArray/*<nsIRDFResource>*/* aArguments,
         203                 :                                 bool* aResult);
         204                 :
         205                 :     NS_IMETHOD DoCommand(nsISupportsArray/*<nsIRDFResource>*/* aSources,
         206                 :                          nsIRDFResource*   aCommand,
         207                 :                          nsISupportsArray/*<nsIRDFResource>*/* aArguments);
         208                 :
         209               0 :     NS_IMETHOD BeginUpdateBatch() {
         210               0 :         return mInner->BeginUpdateBatch();
         211                 :     }
         212                 :
         213               0 :     NS_IMETHOD EndUpdateBatch() {
         214               0 :         return mInner->EndUpdateBatch();
         215                 :     }
         216                 :
         217                 :     NS_IMETHOD GetLoaded(bool* _result);
         218                 :     NS_IMETHOD Init(const char *uri);
         219                 :     NS_IMETHOD Flush();
         220                 :     NS_IMETHOD FlushTo(const char *aURI);
         221                 :     NS_IMETHOD Refresh(bool sync);
         222                 :
         223                 :     // nsIObserver
         224                 :     NS_DECL_NSIOBSERVER
         225                 : };
         226                 :
         227                 : ////////////////////////////////////////////////////////////////////////
         228                 :
         229                 :
         230               0 : LocalStoreImpl::LocalStoreImpl(void)
         231                 : {
         232               0 : }
         233                 :
         234               0 : LocalStoreImpl::~LocalStoreImpl(void)
         235                 : {
         236               0 :     if (mRDFService)
         237               0 :         mRDFService->UnregisterDataSource(this);
         238               0 : }
         239                 :
         240                 :
         241                 : nsresult
         242               0 : NS_NewLocalStore(nsISupports* aOuter, REFNSIID aIID, void** aResult)
         243                 : {
         244               0 :     NS_PRECONDITION(aOuter == nsnull, "no aggregation");
         245               0 :     if (aOuter)
         246               0 :         return NS_ERROR_NO_AGGREGATION;
         247                 :
         248               0 :     NS_PRECONDITION(aResult != nsnull, "null ptr");
         249               0 :     if (! aResult)
         250               0 :         return NS_ERROR_NULL_POINTER;
         251                 :
         252               0 :     LocalStoreImpl* impl = new LocalStoreImpl();
         253               0 :     if (! impl)
         254               0 :         return NS_ERROR_OUT_OF_MEMORY;
         255                 :
         256               0 :     NS_ADDREF(impl);
         257                 :
         258                 :     nsresult rv;
         259               0 :     rv = impl->Init();
         260               0 :     if (NS_SUCCEEDED(rv)) {
         261                 :         // Set up the result pointer
         262               0 :         rv = impl->QueryInterface(aIID, aResult);
         263                 :     }
         264                 :
         265               0 :     NS_RELEASE(impl);
         266               0 :     return rv;
         267                 : }
         268                 :
         269            1396 : NS_IMPL_CYCLE_COLLECTION_1(LocalStoreImpl, mInner)
         270               0 : NS_IMPL_CYCLE_COLLECTING_ADDREF(LocalStoreImpl)
         271               0 : NS_IMPL_CYCLE_COLLECTING_RELEASE(LocalStoreImpl)
         272                 :
         273               0 : NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(LocalStoreImpl)
         274               0 :     NS_INTERFACE_MAP_ENTRY(nsILocalStore)
         275               0 :     NS_INTERFACE_MAP_ENTRY(nsIRDFDataSource)
         276               0 :     NS_INTERFACE_MAP_ENTRY(nsIRDFRemoteDataSource)
         277               0 :     NS_INTERFACE_MAP_ENTRY(nsIObserver)
         278               0 :     NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
         279               0 :     NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsILocalStore)
         280               0 : NS_INTERFACE_MAP_END
         281                 :
         282                 : // nsILocalStore interface
         283                 :
         284                 : // nsIRDFDataSource interface
         285                 :
         286                 : NS_IMETHODIMP
         287               0 : LocalStoreImpl::GetLoaded(bool* _result)
         288                 : {
         289               0 :         nsCOMPtr<nsIRDFRemoteDataSource> remote = do_QueryInterface(mInner);
         290               0 :     NS_ASSERTION(remote != nsnull, "not an nsIRDFRemoteDataSource");
         291               0 :         if (! remote)
         292               0 :         return NS_ERROR_UNEXPECTED;
         293                 :
         294               0 :     return remote->GetLoaded(_result);
         295                 : }
         296                 :
         297                 :
         298                 : NS_IMETHODIMP
         299               0 : LocalStoreImpl::Init(const char *uri)
         300                 : {
         301               0 :         return(NS_OK);
         302                 : }
         303                 :
         304                 : NS_IMETHODIMP
         305               0 : LocalStoreImpl::Flush()
         306                 : {
         307               0 :         nsCOMPtr<nsIRDFRemoteDataSource> remote = do_QueryInterface(mInner);
         308                 :     // FIXME Bug 340242: Temporarily make this a warning rather than an
         309                 :     // assertion until we sort out the ordering of how we write
         310                 :     // everything to the localstore, flush it, and disconnect it when
         311                 :     // we're getting profile-change notifications.
         312               0 :     NS_WARN_IF_FALSE(remote != nsnull, "not an nsIRDFRemoteDataSource");
         313               0 :         if (! remote)
         314               0 :         return NS_ERROR_UNEXPECTED;
         315                 :
         316               0 :     return remote->Flush();
         317                 : }
         318                 :
         319                 : NS_IMETHODIMP
         320               0 : LocalStoreImpl::FlushTo(const char *aURI)
         321                 : {
         322                 :   // Do not ever implement this (security)
         323               0 :   return NS_ERROR_NOT_IMPLEMENTED;
         324                 : }
         325                 :
         326                 : NS_IMETHODIMP
         327               0 : LocalStoreImpl::Refresh(bool sync)
         328                 : {
         329               0 :         nsCOMPtr<nsIRDFRemoteDataSource> remote = do_QueryInterface(mInner);
         330               0 :     NS_ASSERTION(remote != nsnull, "not an nsIRDFRemoteDataSource");
         331               0 :         if (! remote)
         332               0 :         return NS_ERROR_UNEXPECTED;
         333                 :
         334               0 :     return remote->Refresh(sync);
         335                 : }
         336                 :
         337                 : nsresult
         338               0 : LocalStoreImpl::Init()
         339                 : {
         340                 :     nsresult rv;
         341                 :
         342               0 :     rv = LoadData();
         343               0 :     if (NS_FAILED(rv)) return rv;
         344                 :
         345                 :     // register this as a named data source with the RDF service
         346               0 :     mRDFService = do_GetService(NS_RDF_CONTRACTID "/rdf-service;1", &rv);
         347               0 :     if (NS_FAILED(rv)) return rv;
         348                 :
         349               0 :     mRDFService->RegisterDataSource(this, false);
         350                 :
         351                 :     // Register as an observer of profile changes
         352                 :     nsCOMPtr<nsIObserverService> obs =
         353               0 :         do_GetService("@mozilla.org/observer-service;1");
         354                 :
         355               0 :     if (obs) {
         356               0 :         obs->AddObserver(this, "profile-before-change", true);
         357               0 :         obs->AddObserver(this, "profile-do-change", true);
         358                 :     }
         359                 :
         360               0 :     return NS_OK;
         361                 : }
         362                 :
         363                 : nsresult
         364               0 : LocalStoreImpl::CreateLocalStore(nsIFile* aFile)
         365                 : {
         366                 :     nsresult rv;
         367                 :
         368               0 :     rv = aFile->Create(nsIFile::NORMAL_FILE_TYPE, 0666);
         369               0 :     if (NS_FAILED(rv)) return rv;
         370                 :
         371               0 :     nsCOMPtr<nsIOutputStream> outStream;
         372               0 :     rv = NS_NewLocalFileOutputStream(getter_AddRefs(outStream), aFile);
         373               0 :     if (NS_FAILED(rv)) return rv;
         374                 :
         375                 :     const char defaultRDF[] =
         376                 :         "<?xml version=\"1.0\"?>\n" \
         377                 :         "<RDF:RDF xmlns:RDF=\"" RDF_NAMESPACE_URI "\"\n" \
         378                 :         "         xmlns:NC=\""  NC_NAMESPACE_URI "\">\n" \
         379                 :         "  <!-- Empty -->\n" \
         380               0 :         "</RDF:RDF>\n";
         381                 :
         382                 :     PRUint32 count;
         383               0 :     rv = outStream->Write(defaultRDF, sizeof(defaultRDF)-1, &count);
         384               0 :     if (NS_FAILED(rv)) return rv;
         385                 :
         386               0 :     if (count != sizeof(defaultRDF)-1)
         387               0 :         return NS_ERROR_UNEXPECTED;
         388                 :
         389                 :     // Okay, now see if the file exists _for real_. If it's still
         390                 :     // not there, it could be that the profile service gave us
         391                 :     // back a read-only directory. Whatever.
         392               0 :     bool fileExistsFlag = false;
         393               0 :     aFile->Exists(&fileExistsFlag);
         394               0 :     if (!fileExistsFlag)
         395               0 :         return NS_ERROR_UNEXPECTED;
         396                 :
         397               0 :     return NS_OK;
         398                 : }
         399                 :
         400                 : nsresult
         401               0 : LocalStoreImpl::LoadData()
         402                 : {
         403                 :     nsresult rv;
         404                 :
         405                 :     // Look for localstore.rdf in the current profile
         406                 :     // directory. Bomb if we can't find it.
         407                 :
         408               0 :     nsCOMPtr<nsIFile> aFile;
         409               0 :     rv = NS_GetSpecialDirectory(NS_APP_LOCALSTORE_50_FILE, getter_AddRefs(aFile));
         410               0 :     if (NS_FAILED(rv)) return rv;
         411                 :
         412               0 :     bool fileExistsFlag = false;
         413               0 :     (void)aFile->Exists(&fileExistsFlag);
         414               0 :     if (!fileExistsFlag) {
         415                 :         // if file doesn't exist, create it
         416               0 :         rv = CreateLocalStore(aFile);
         417               0 :         if (NS_FAILED(rv)) return rv;
         418                 :     }
         419                 :
         420               0 :     mInner = do_CreateInstance(NS_RDF_DATASOURCE_CONTRACTID_PREFIX "xml-datasource", &rv);
         421               0 :     if (NS_FAILED(rv)) return rv;
         422                 :
         423               0 :     nsCOMPtr<nsIRDFRemoteDataSource> remote = do_QueryInterface(mInner, &rv);
         424               0 :     if (NS_FAILED(rv)) return rv;
         425                 :
         426               0 :     nsCOMPtr<nsIURI> aURI;
         427               0 :     rv = NS_NewFileURI(getter_AddRefs(aURI), aFile);
         428               0 :     if (NS_FAILED(rv)) return rv;
         429                 :
         430               0 :     nsCAutoString spec;
         431               0 :     rv = aURI->GetSpec(spec);
         432               0 :     if (NS_FAILED(rv)) return rv;
         433                 :
         434               0 :     rv = remote->Init(spec.get());
         435               0 :     if (NS_FAILED(rv)) return rv;
         436                 :
         437                 :     // Read the datasource synchronously.
         438               0 :     rv = remote->Refresh(true);
         439                 :
         440               0 :     if (NS_FAILED(rv)) {
         441                 :         // Load failed, delete and recreate a fresh localstore
         442               0 :         aFile->Remove(true);
         443               0 :         rv = CreateLocalStore(aFile);
         444               0 :         if (NS_FAILED(rv)) return rv;
         445                 :
         446               0 :         rv = remote->Refresh(true);
         447                 :     }
         448                 :
         449               0 :     return rv;
         450                 : }
         451                 :
         452                 :
         453                 : NS_IMETHODIMP
         454               0 : LocalStoreImpl::GetURI(char* *aURI)
         455                 : {
         456               0 :     NS_PRECONDITION(aURI != nsnull, "null ptr");
         457               0 :     if (! aURI)
         458               0 :         return NS_ERROR_NULL_POINTER;
         459                 :
         460               0 :     *aURI = NS_strdup("rdf:local-store");
         461               0 :     if (! *aURI)
         462               0 :         return NS_ERROR_OUT_OF_MEMORY;
         463                 :
         464               0 :     return NS_OK;
         465                 : }
         466                 :
         467                 :
         468                 : NS_IMETHODIMP
         469               0 : LocalStoreImpl::GetAllCmds(nsIRDFResource* aSource,
         470                 :                                nsISimpleEnumerator/*<nsIRDFResource>*/** aCommands)
         471                 : {
         472               0 :         return(NS_NewEmptyEnumerator(aCommands));
         473                 : }
         474                 :
         475                 : NS_IMETHODIMP
         476               0 : LocalStoreImpl::IsCommandEnabled(nsISupportsArray/*<nsIRDFResource>*/* aSources,
         477                 :                                  nsIRDFResource*   aCommand,
         478                 :                                  nsISupportsArray/*<nsIRDFResource>*/* aArguments,
         479                 :                                  bool* aResult)
         480                 : {
         481               0 :     *aResult = true;
         482               0 :     return NS_OK;
         483                 : }
         484                 :
         485                 : NS_IMETHODIMP
         486               0 : LocalStoreImpl::DoCommand(nsISupportsArray* aSources,
         487                 :                           nsIRDFResource*   aCommand,
         488                 :                           nsISupportsArray* aArguments)
         489                 : {
         490                 :     // no-op
         491               0 :     return NS_OK;
         492                 : }
         493                 :
         494                 : NS_IMETHODIMP
         495               0 : LocalStoreImpl::Observe(nsISupports *aSubject, const char *aTopic, const PRUnichar *someData)
         496                 : {
         497               0 :     nsresult rv = NS_OK;
         498                 :
         499               0 :     if (!nsCRT::strcmp(aTopic, "profile-before-change")) {
         500                 :         // Write out the old datasource's contents.
         501               0 :         if (mInner) {
         502               0 :             nsCOMPtr<nsIRDFRemoteDataSource> remote = do_QueryInterface(mInner);
         503               0 :             if (remote)
         504               0 :                 remote->Flush();
         505                 :         }
         506                 :
         507                 :         // Create an in-memory datasource for use while we're
         508                 :         // profile-less.
         509               0 :         mInner = do_CreateInstance(NS_RDF_DATASOURCE_CONTRACTID_PREFIX "in-memory-datasource");
         510                 :
         511               0 :         if (!nsCRT::strcmp(NS_ConvertUTF16toUTF8(someData).get(), "shutdown-cleanse")) {
         512               0 :             nsCOMPtr<nsIFile> aFile;
         513               0 :             rv = NS_GetSpecialDirectory(NS_APP_LOCALSTORE_50_FILE, getter_AddRefs(aFile));
         514               0 :             if (NS_SUCCEEDED(rv))
         515               0 :                 rv = aFile->Remove(false);
         516                 :         }
         517                 :     }
         518               0 :     else if (!nsCRT::strcmp(aTopic, "profile-do-change")) {
         519               0 :         rv = LoadData();
         520                 :     }
         521               0 :     return rv;
         522            4188 : }

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