--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/omads/omadsextensions/adapters/contactsgroup/src/snapshotitem.cpp	Tue Aug 31 15:05:37 2010 +0300
@@ -0,0 +1,127 @@
+/*
+* Copyright (c) 2010 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:  Part of SyncML Data Synchronization Plug In Adapter
+*
+*/
+
+#include <hash.h>
+#include <utf.h>
+#include <cntitem.h>
+
+#include "snapshotitem.h"
+#include "logger.h"
+
+
+// -----------------------------------------------------------------------------
+// TSnapshotItem::TSnapshotItem
+// C++ default constructor can NOT contain any code, that might leave
+// -----------------------------------------------------------------------------
+TSnapshotItem::TSnapshotItem() : TNSmlSnapshotItem()
+    {
+    }
+
+// -----------------------------------------------------------------------------
+// TSnapshotItem::TSnapshotItem
+// Constructor, takes item id as a parameter
+// -----------------------------------------------------------------------------
+TSnapshotItem::TSnapshotItem( const TSmlDbItemUid& aItemId,
+    const TSmlDbItemUid& aParent )
+: TNSmlSnapshotItem( aItemId )
+    {
+    SetParentId( aParent );
+    }
+
+// -----------------------------------------------------------------------------
+// TSnapshotItem::ExternalizeL
+// Writes the contents of this class and it's base to stream
+// -----------------------------------------------------------------------------
+void TSnapshotItem::ExternalizeL( RWriteStream& aStream ) const
+    {
+    TNSmlSnapshotItem::ExternalizeL( aStream );
+    TPckgBuf<THashValue> nameBuf(iHash);
+	aStream << nameBuf;
+    }
+
+// -----------------------------------------------------------------------------
+// TSnapshotItem::InternalizeL
+// Reads the contents of this class and it's base from stream
+// -----------------------------------------------------------------------------
+void TSnapshotItem::InternalizeL( RReadStream& aStream )
+    {
+    TNSmlSnapshotItem::InternalizeL( aStream );
+    TPckgBuf<THashValue> nameBuf;
+	aStream >> nameBuf;
+	iHash = nameBuf();
+    }
+
+// -----------------------------------------------------------------------------
+// TSnapshotItem::CreateHashL
+// Create hash value from group content
+// -----------------------------------------------------------------------------
+void TSnapshotItem::CreateHashL( CContactGroup& aGroup )
+    {
+    CMessageDigest* hash = CMessageDigestFactory::NewDigestLC( CMessageDigest::EMD5 );
+    
+    if ( aGroup.HasItemLabelField() )
+        {
+        TPtrC label = aGroup.GetGroupLabelL();
+        HBufC8* tempBuf = CnvUtfConverter::ConvertFromUnicodeToUtf8L( label );
+        CleanupStack::PushL( tempBuf );
+        hash->Update( tempBuf->Des() );
+        CleanupStack::PopAndDestroy( tempBuf );
+        }
+    
+    // Create text field from items on group
+    CContactIdArray* contactsIdArray = aGroup.ItemsContainedLC();
+    const TInt idBufferMaxSize( 400 );
+    HBufC8* tempIdBuf = HBufC8::NewLC( idBufferMaxSize );
+    TPtr8 tempId = tempIdBuf->Des();
+    const TInt KMaxNumLength(5);
+    if ( contactsIdArray ) // this is NULL if there are no objects
+        {
+        tempId.AppendNum( contactsIdArray->Count(), EHex );
+        for (TInt i=0; i< contactsIdArray->Count(); i++ )
+            {
+            if ( tempId.Length()+KMaxNumLength > tempId.MaxLength() )
+                {
+                // buffer is almost full, don't add any new items
+                LOGGER_WRITE("buffer full");
+                break;
+                }
+            // add item id
+            tempId.AppendNum( (*contactsIdArray)[i] , EHex );
+            }
+        }
+    else
+        {
+        tempId.AppendNum( 0 );
+        }
+    // update hash
+    hash->Update( tempId );
+    
+    iHash.Copy( hash->Final() );
+    
+    CleanupStack::PopAndDestroy( tempIdBuf );
+    CleanupStack::PopAndDestroy( contactsIdArray );
+    CleanupStack::PopAndDestroy( hash );
+    }
+
+// -----------------------------------------------------------------------------
+// TSnapshotItem::Hash
+// Gets Hash
+// -----------------------------------------------------------------------------
+const TDesC8& TSnapshotItem::Hash() const
+    {
+    return iHash;
+    }