| // Copyright (c) 2012 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_PREDICTORS_AUTOCOMPLETE_ACTION_PREDICTOR_TABLE_H_ |
| #define CHROME_BROWSER_PREDICTORS_AUTOCOMPLETE_ACTION_PREDICTOR_TABLE_H_ |
| |
| #include <string> |
| #include <vector> |
| |
| #include "base/strings/string16.h" |
| #include "chrome/browser/predictors/predictor_table_base.h" |
| #include "url/gurl.h" |
| |
| namespace predictors { |
| |
| // This manages the autocomplete predictor table within the SQLite database |
| // passed in to the constructor. It expects the following scheme: |
| // |
| // network_action_predictor |
| // id A unique id. |
| // user_text What the user typed. |
| // url The URL of the entry. |
| // number_of_hits Number of times the entry was shown to the user and |
| // selected. |
| // number_of_misses Number of times the entry was shown to the user but not |
| // selected. |
| // |
| // TODO(dominich): Consider adding this table to one of the history databases. |
| // In memory is currently used, but adding to the on-disk visits database |
| // would allow DeleteOldEntries to be cheaper through use of a join. |
| // |
| // All the functions apart from constructor and destructor have to be called in |
| // the DB thread. |
| class AutocompleteActionPredictorTable : public PredictorTableBase { |
| public: |
| struct Row { |
| // TODO(dominich): Make this 64-bit integer as an optimization. This |
| // requires some investigation into how to make sure the id is unique for |
| // each user_text/url pair. |
| // http://crbug.com/102020 |
| typedef std::string Id; |
| |
| Row(); |
| |
| // Only used by unit tests. |
| Row(const Id& id, |
| const base::string16& user_text, |
| const GURL& url, |
| int number_of_hits, |
| int number_of_misses); |
| |
| Row(const Row& row); |
| |
| Id id; |
| base::string16 user_text; |
| GURL url; |
| int number_of_hits; |
| int number_of_misses; |
| }; |
| |
| typedef std::vector<Row> Rows; |
| |
| // DB thread functions. |
| void GetRow(const Row::Id& id, Row* row); |
| void GetAllRows(Rows* row_buffer); |
| void AddRow(const Row& row); |
| void UpdateRow(const Row& row); |
| void AddAndUpdateRows(const Rows& rows_to_add, const Rows& rows_to_update); |
| void DeleteRows(const std::vector<Row::Id>& id_list); |
| void DeleteAllRows(); |
| |
| private: |
| friend class PredictorDatabaseInternal; |
| |
| AutocompleteActionPredictorTable(); |
| virtual ~AutocompleteActionPredictorTable(); |
| |
| // PredictorTableBase methods (DB thread). |
| virtual void CreateTableIfNonExistent() OVERRIDE; |
| virtual void LogDatabaseStats() OVERRIDE; |
| |
| DISALLOW_COPY_AND_ASSIGN(AutocompleteActionPredictorTable); |
| }; |
| |
| } // namespace predictors |
| |
| #endif // CHROME_BROWSER_PREDICTORS_AUTOCOMPLETE_ACTION_PREDICTOR_TABLE_H_ |