content/browser/indexed_db/indexed_db_class_factory.h

   1 // Copyright 2014 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 CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_CLASS_FACTORY_H_
   6 #define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_CLASS_FACTORY_H_
   7
   8 #include "base/lazy_instance.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "content/common/content_export.h"
  11
  12 namespace leveldb {
  13 class Iterator;
  14 }  // namespace leveldb
  15
  16 namespace content {
  17
  18 class LevelDBIteratorImpl;
  19 class LevelDBDatabase;
  20 class LevelDBTransaction;
  21
  22 // Use this factory to create some IndexedDB objects. Exists solely to
  23 // facilitate tests which sometimes need to inject mock objects into the system.
  24 class CONTENT_EXPORT IndexedDBClassFactory {
  25  public:
  26   typedef IndexedDBClassFactory* GetterCallback();
  27
  28   static IndexedDBClassFactory* Get();
  29
  30   static void SetIndexedDBClassFactoryGetter(GetterCallback* cb);
  31
  32   virtual LevelDBIteratorImpl* CreateIteratorImpl(
  33       scoped_ptr<leveldb::Iterator> iterator);
  34   virtual LevelDBTransaction* CreateLevelDBTransaction(LevelDBDatabase* db);
  35
  36  protected:
  37   IndexedDBClassFactory() {}
  38   virtual ~IndexedDBClassFactory() {}
  39   friend struct base::DefaultLazyInstanceTraits<IndexedDBClassFactory>;
  40 };
  41
  42 }  // namespace content
  43
  44 #endif  // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_CLASS_FACTORY_H_