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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_FACTORY_IMPL_H_
#define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_FACTORY_IMPL_H_

#include <map>
#include <set>

#include "base/basictypes.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "content/browser/indexed_db/indexed_db_callbacks_wrapper.h"
#include "content/browser/indexed_db/indexed_db_database_callbacks_wrapper.h"
#include "content/browser/indexed_db/indexed_db_factory.h"
#include "content/common/content_export.h"

namespace content {

class IndexedDBBackingStore;
class IndexedDBDatabaseImpl;

class CONTENT_EXPORT IndexedDBFactoryImpl
    : NON_EXPORTED_BASE(public IndexedDBFactory) {
 public:
  static scoped_refptr<IndexedDBFactoryImpl> Create() {
    return make_scoped_refptr(new IndexedDBFactoryImpl());
  }

  // Notifications from weak pointers.
  virtual void RemoveIDBDatabaseBackend(const string16& unique_identifier);

  virtual void GetDatabaseNames(
      scoped_refptr<IndexedDBCallbacksWrapper> callbacks,
      const string16& database_identifier,
      const string16& data_dir) OVERRIDE;
  virtual void Open(
      const string16& name,
      int64 version,
      int64 transaction_id,
      scoped_refptr<IndexedDBCallbacksWrapper> callbacks,
      scoped_refptr<IndexedDBDatabaseCallbacksWrapper> database_callbacks,
      const string16& database_identifier,
      const string16& data_dir) OVERRIDE;

  virtual void DeleteDatabase(
      const string16& name,
      scoped_refptr<IndexedDBCallbacksWrapper> callbacks,
      const string16& database_identifier,
      const string16& data_dir) OVERRIDE;

 protected:
  IndexedDBFactoryImpl();
  virtual ~IndexedDBFactoryImpl();
  virtual scoped_refptr<IndexedDBBackingStore> OpenBackingStore(
      const string16& database_identifier,
      const string16& data_dir);

 private:
  typedef std::map<string16, scoped_refptr<IndexedDBDatabaseImpl> >
      IndexedDBDatabaseMap;
  IndexedDBDatabaseMap database_backend_map_;

  typedef std::map<string16, base::WeakPtr<IndexedDBBackingStore> >
      IndexedDBBackingStoreMap;
  IndexedDBBackingStoreMap backing_store_map_;

  std::set<scoped_refptr<IndexedDBBackingStore> > session_only_backing_stores_;

  // Only one instance of the factory should exist at any given time.
  static IndexedDBFactoryImpl* idb_factory_backend_impl;
};

}  // namespace content

#endif  // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_FACTORY_IMPL_H_