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// Copyright (c) 2006-2008 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 CHROME_BROWSER_HISTORY_HISTORY_MEMORY_DB_H__
#define CHROME_BROWSER_HISTORY_HISTORY_MEMORY_DB_H__
#include "base/basictypes.h"
#include "chrome/browser/history/url_database.h"
#include "chrome/common/sqlite_compiled_statement.h"
struct sqlite3;
namespace history {
// Class used for a fast in-memory cache of typed URLs. Used for inline
// autocomplete since it is fast enough to be called synchronously as the user
// is typing.
class InMemoryDatabase : public URLDatabase {
public:
InMemoryDatabase();
virtual ~InMemoryDatabase();
// Creates an empty in-memory database.
bool InitFromScratch();
// Initializes the database by directly slurping the data from the given
// file. Conceptually, the InMemoryHistoryBackend should do the populating
// after this object does some common initialization, but that would be
// much slower.
bool InitFromDisk(const std::wstring& history_name);
protected:
// Implemented for URLDatabase.
virtual sqlite3* GetDB();
virtual SqliteStatementCache& GetStatementCache();
private:
// Initializes the database connection, this is the shared code between
// InitFromScratch() and InitFromDisk() above. Returns true on success.
bool InitDB();
// The close scoper will free the database and delete the statement cache in
// the correct order automatically when we are destroyed.
DBCloseScoper db_closer_;
sqlite3* db_;
SqliteStatementCache* statement_cache_;
DISALLOW_EVIL_CONSTRUCTORS(InMemoryDatabase);
};
} // namespace history
#endif // CHROME_BROWSER_HISTORY_HISTORY_MEMORY_DB_H__
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