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      1 // Copyright 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef SYNC_SYNCABLE_SYNCABLE_MODEL_NEUTRAL_WRITE_TRANSACTION_H_
      6 #define SYNC_SYNCABLE_SYNCABLE_MODEL_NEUTRAL_WRITE_TRANSACTION_H_
      7 
      8 #include "sync/base/sync_export.h"
      9 #include "sync/syncable/metahandle_set.h"
     10 #include "sync/syncable/syncable_base_write_transaction.h"
     11 
     12 namespace syncer {
     13 namespace syncable {
     14 
     15 // A transaction used to instantiate Entries or ModelNeutralMutableEntries.
     16 //
     17 // This allows it to be used when making changes to sync entity properties that
     18 // do not need to be kept in sync with the associated native model.
     19 //
     20 // This class differs internally from WriteTransactions in that it does a less
     21 // good job of tracking and reporting on changes to the entries modified within
     22 // its scope.  This is because its changes do not need to be reported to the
     23 // DirectoryChangeDelegate.
     24 class SYNC_EXPORT_PRIVATE ModelNeutralWriteTransaction
     25     : public BaseWriteTransaction {
     26  public:
     27   ModelNeutralWriteTransaction(
     28       const tracked_objects::Location& location,
     29       WriterTag writer,
     30       Directory* directory);
     31   virtual ~ModelNeutralWriteTransaction();
     32 
     33   virtual void TrackChangesTo(const EntryKernel* entry) OVERRIDE;
     34 
     35  private:
     36   MetahandleSet modified_handles_;
     37 
     38   DISALLOW_COPY_AND_ASSIGN(ModelNeutralWriteTransaction);
     39 };
     40 
     41 }  // namespace syncable
     42 }  // namespace syncer
     43 
     44 #endif  // SYNC_SYNCABLE_SYNCABLE_MODEL_NEUTRAL_WRITE_TRANSACTION_H_
     45