Componentize HistoryDatabase

components/history/core/android/android_urls_database.h

-// 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 COMPONENTS_HISTORY_CORE_ANDROID_ANDROID_URLS_DATABASE_H_
-#define COMPONENTS_HISTORY_CORE_ANDROID_ANDROID_URLS_DATABASE_H_
-
-#include "components/history/core/android/android_history_types.h"
-
-namespace history {
-
-// The table is used to stores the raw url which was passed in from
-// ContentProvider APIs' client.
-//
-// Android BookmarmkCoulmns API allows the url without protocol like
-// "www.bookmarks.com", but Chrome requires the url to be unique, like
-// "http://www.bookmarks.com/". To support client queries by the orignal URL,
-// the raw URL and corresponding URLID is stored in this table.
-//
-// Though the raw URL is stored. The 'www.bookmark.com' and
-// 'http://www.bookmark.com' are still treated as the same URL, which means
-// if adding these two urls, the later one will fail.
-class AndroidURLsDatabase {
- public:
-  AndroidURLsDatabase();
-  virtual ~AndroidURLsDatabase();
-
-  // Creates the android_urls table if it doesn't exist. Returns true if the
-  // table was created or already exists.
-  bool CreateAndroidURLsTable();
-
-  // Adds a new mapping between |raw_url| and |url_id|, returns the id if it
-  // succeeds, otherwise 0 is returned.
-  AndroidURLID AddAndroidURLRow(const std::string& raw_url, URLID url_id);
-
-  // Looks up the given |url_id| in android_urls table. Returns true if success,
-  // and fill in the |row| if it not NULL, returns false if the |url_id| is not
-  // found.
-  bool GetAndroidURLRow(URLID url_id, AndroidURLRow* row);
-
-  // Deletes the rows whose url_id is in |url_ids|. Returns true if all
-  // |url_ids| were found and deleted, otherwise false is returned.
-  bool DeleteAndroidURLRows(const std::vector<URLID>& url_ids);
-
-  // Deletes all the rows whose url_id doesn't exist in urls table. Returns true
-  // on success.
-  bool DeleteUnusedAndroidURLs();
-
-  // Updates the row of |id| with the given |raw_url| and |url_id|. Returns true
-  // on success.
-  bool UpdateAndroidURLRow(AndroidURLID id,
-                           const std::string&raw_url,
-                           URLID url_id);
-
-  // Clears all the rows in android_urls table, returns true on success, false
-  // on error.
-  bool ClearAndroidURLRows();
-
-  // Migrate from version 21 to 22.
-  bool MigrateToVersion22();
-
- protected:
-  // Returns the database for the functions in this interface. The decendent of
-  // this class implements these functions to return its objects.
-  virtual sql::Connection& GetDB() = 0;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(AndroidURLsDatabase);
-};
-
-}  // namespace history
-
-#endif  // COMPONENTS_HISTORY_CORE_ANDROID_ANDROID_URLS_DATABASE_H_