diff -r 000000000000 -r 8466d47a6819 emailservices/emailclientapi/src/emailmailboxcache.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/emailservices/emailclientapi/src/emailmailboxcache.cpp	Thu Dec 17 08:39:21 2009 +0200
@@ -0,0 +1,209 @@
+/*
+* Copyright (c) 2009 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: This file implements class CEmailMailboxCache.
+*
+*/
+
+#include "emailmailboxcache.h"
+#include "emailapiutils.h"
+
+static const TInt KCacheGranularity = 2;
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+CEmailMailboxCache* CEmailMailboxCache::NewL()
+    {
+    CEmailMailboxCache* cache = new ( ELeave ) CEmailMailboxCache();
+    return cache;
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+CEmailMailboxCache::~CEmailMailboxCache()
+    {
+    iEntries.Close();
+    }
+
+// ---------------------------------------------------------------------------
+// Start of cache transaction with clenanup support
+// ---------------------------------------------------------------------------
+//
+void CEmailMailboxCache::StartCachingPushL()
+    {
+    TCleanupItem item( &CEmailMailboxCache::CleanupOp, this );
+    CleanupStack::PushL( item );
+    iState = ECaching;
+    iEntries.Reset();
+    }
+    
+// ---------------------------------------------------------------------------
+//  End of cache transaction
+// ---------------------------------------------------------------------------
+//
+void CEmailMailboxCache::EndCachingPop()
+    {
+    iState = EComplete;
+    CleanupStack::Pop();
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+TBool CEmailMailboxCache::IsCached() const
+    {
+    return iState == EComplete;
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+void CEmailMailboxCache::AddMailboxL( 
+    CPluginData& aPluginData, 
+    const TMailboxId& aMailboxId )
+    {
+    if ( iState != ECaching )
+        {
+        User::Leave( KErrNotReady );
+        }
+    if ( FindById( aMailboxId ) == KErrNotFound )
+        {
+        TCacheEntry entry( &aPluginData, aMailboxId );
+        iEntries.AppendL( entry );
+        }
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+CPluginData* CEmailMailboxCache::PluginDataL( const TMailboxId& aMailboxId ) const
+    {
+    CPluginData* pdata = NULL;
+    const TInt index( FindById( aMailboxId ) );
+    if ( index != KErrNotFound )
+        {
+        const TCacheEntry& entry = iEntries[ index ];
+        pdata = entry.iPluginData;
+        }
+    return pdata;
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+CPluginData* CEmailMailboxCache::PluginDataL( const TUid& aPluginId ) const
+    {
+    CPluginData* pdata = NULL;
+    const TInt index( FindByPluginIdL( aPluginId ) );
+    if ( index != KErrNotFound )
+        {
+        const TCacheEntry& entry = iEntries[ index ];
+        pdata = entry.iPluginData;
+        }    
+    return pdata;
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+void CEmailMailboxCache::GetIdsL( REmailMailboxIdArray& aIdArray ) const
+    {
+    if ( iState != EComplete )
+        {
+        // cache not up to date
+        User::Leave( KErrNotReady );
+        }
+    for ( TInt i=0; i < iEntries.Count(); i++ )
+        {
+        TMailboxId id = iEntries[i].iMailboxId;
+        aIdArray.AppendL( id );
+        }
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+TInt CEmailMailboxCache::FindById( const TMailboxId& aMailboxId ) const
+    {
+    TIdentityRelation<TCacheEntry> rel( CEmailMailboxCache::Equals );
+    
+    // don't care about plugin data because this is seach key only and
+    // mailbox id is used for search
+    TCacheEntry entry( NULL, aMailboxId );
+    return iEntries.Find( entry, rel );
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+TInt CEmailMailboxCache::FindByPluginIdL( const TUid& aPluginId ) const
+    {
+    TIdentityRelation<TCacheEntry> rel( CEmailMailboxCache::PluginEquals );
+    CPluginData* key = new ( ELeave ) CPluginData( aPluginId );
+    TCacheEntry entry( key, TMailboxId() );
+    TInt index = iEntries.Find( entry, rel ); 
+    delete key;
+    return index;
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+TBool CEmailMailboxCache::Equals( const TCacheEntry& a1, const TCacheEntry& a2 )
+    {
+    return ( a1.iMailboxId == a2.iMailboxId );
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+TBool CEmailMailboxCache::PluginEquals( const TCacheEntry& a1, const TCacheEntry& a2 )
+    {
+    return ( a1.iPluginData->Uid() == a2.iPluginData->Uid() );
+    }
+
+// ---------------------------------------------------------------------------
+// Cleanup 
+// ---------------------------------------------------------------------------
+//
+void CEmailMailboxCache::CleanupOp( TAny* aAny )
+    {
+    CEmailMailboxCache* cache = reinterpret_cast<CEmailMailboxCache*>( aAny );
+    cache->iEntries.Reset();
+    cache->iState = EEmpty;
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+CEmailMailboxCache::CEmailMailboxCache() : 
+    iState( EEmpty ), 
+    iEntries( KCacheGranularity )
+    {
+    }
+
+// End of file.