--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/menufw/hierarchynavigator/hnmetadatamodel/src/hnxmlmodelcache.cpp Thu Dec 17 08:40:49 2009 +0200
@@ -0,0 +1,204 @@
+/*
+* Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:
+*
+*/
+
+
+#include "hnxmlmodelcache.h"
+#include "hnglobals.h"
+
+// ---------------------------------------------------------------------------
+//
+// ---------------------------------------------------------------------------
+//
+TUint32 HBufCHashCache( HBufC* const & aBuf )
+ {
+ return DefaultHash::Des16(*aBuf);
+ }
+
+// ---------------------------------------------------------------------------
+//
+// ---------------------------------------------------------------------------
+//
+TBool HBufCIdentCache( HBufC* const & aL, HBufC* const & aR )
+ {
+ return DefaultIdentity::Des16(*aL, *aR);
+ }
+
+
+// ---------------------------------------------------------------------------
+//
+// ---------------------------------------------------------------------------
+//
+CHnXmlModelCache::CHnXmlModelCache() : iDocuments( &HBufCHashCache,
+ &HBufCIdentCache )
+ {
+
+ }
+
+// ---------------------------------------------------------------------------
+//
+// ---------------------------------------------------------------------------
+//
+void CHnXmlModelCache::ConstructL()
+ {
+
+ }
+
+// ---------------------------------------------------------------------------
+//
+// ---------------------------------------------------------------------------
+//
+void CHnXmlModelCache::RemoveUnused()
+ {
+ // remove unnecessary (oldest and unused) xml cached documents
+ if(iDocuments.Count() > KXmlModelCacheMaxLength)
+ {
+ HBufC *suiteToRemove = iOrder[0];
+ RXmlEngDocument* document = iDocuments.Find( suiteToRemove );
+ document->Close();
+ iDocuments.Remove(suiteToRemove);
+ iOrder.Remove(0);
+ delete suiteToRemove;
+ }
+ }
+
+// ---------------------------------------------------------------------------
+//
+// ---------------------------------------------------------------------------
+//
+TInt CHnXmlModelCache::AddL( const TDesC& aSuiteName, RXmlEngDocument& aDocument )
+ {
+ HBufC* key = aSuiteName.AllocLC();
+ iDocuments.InsertL( key, aDocument );
+ CleanupStack::Pop( key );
+ iOrder.AppendL( key );
+ RemoveUnused();
+ return KErrNone;
+ }
+
+// ---------------------------------------------------------------------------
+//
+// ---------------------------------------------------------------------------
+//
+TBool CHnXmlModelCache::IsCachedL( const TDesC& aSuiteName )
+ {
+ HBufC* buf = aSuiteName.AllocLC();
+ const RXmlEngDocument* res = iDocuments.Find( buf );
+ CleanupStack::PopAndDestroy( buf );
+
+ if ( res )
+ return ETrue;
+ else
+ return EFalse;
+ }
+
+// ---------------------------------------------------------------------------
+//
+// ---------------------------------------------------------------------------
+//
+void CHnXmlModelCache::MoveToTopL( const TDesC & aSuiteName )
+ {
+ TInt pos( KErrNotFound );
+
+ for ( TInt i(0); i < iOrder.Count(); i++ )
+ {
+ if ( !iOrder[i]->Compare( aSuiteName ) )
+ {
+ pos = i;
+ break;
+ }
+ }
+
+ // if document was found and is not the latest in the array
+ if ( pos != KErrNotFound && ( pos != iOrder.Count() - 1 ) )
+ {
+ HBufC *tmp = iOrder[ pos ];
+ iOrder.Remove( pos );
+ iOrder.AppendL( tmp );
+ }
+ }
+
+// ---------------------------------------------------------------------------
+//
+// ---------------------------------------------------------------------------
+//
+void CHnXmlModelCache::GetL( const TDesC& aSuiteName,
+ RXmlEngDocument& aDocument )
+ {
+ HBufC* buf = aSuiteName.AllocLC();
+ const RXmlEngDocument* res = iDocuments.Find( buf );
+
+ MoveToTopL( aSuiteName );
+
+ if ( res )
+ {
+ aDocument = *res;
+ }
+
+ CleanupStack::PopAndDestroy( buf );
+ }
+
+// ---------------------------------------------------------------------------
+//
+// ---------------------------------------------------------------------------
+//
+CHnXmlModelCache* CHnXmlModelCache::NewLC()
+ {
+ CHnXmlModelCache* self = new (ELeave) CHnXmlModelCache();
+ CleanupStack::PushL( self );
+ self->ConstructL();
+ return self;
+ }
+
+// ---------------------------------------------------------------------------
+//
+// ---------------------------------------------------------------------------
+//
+CHnXmlModelCache* CHnXmlModelCache::NewL()
+ {
+ CHnXmlModelCache* self = CHnXmlModelCache::NewLC();
+ CleanupStack::Pop( self );
+ return self;
+ }
+
+// ---------------------------------------------------------------------------
+//
+// ---------------------------------------------------------------------------
+//
+void CHnXmlModelCache::Reset()
+ {
+ THashMapIter<HBufC*, RXmlEngDocument> iter( iDocuments );
+ while ( HBufC* const * ptr = iter.NextKey() )
+ {
+ RXmlEngDocument* currentDocument = iter.CurrentValue();
+ currentDocument->Close();
+ delete *ptr;
+ }
+ iDocuments.Close();
+ // Names have already been destroyed when destroying iDocuments so
+ // it is not necessay to destroy elements of the iOrder array.
+ iOrder.Close();
+ }
+
+
+// ---------------------------------------------------------------------------
+//
+// ---------------------------------------------------------------------------
+//
+CHnXmlModelCache::~CHnXmlModelCache()
+ {
+ Reset();
+ }