1 // Copyright (c) 2012 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 CHROME_BROWSER_HISTORY_ANDROID_SQL_HANDLER_H_ 6 #define CHROME_BROWSER_HISTORY_ANDROID_SQL_HANDLER_H_ 7 8 #include "chrome/browser/history/android/android_history_types.h" 9 10 namespace history { 11 12 // This is a wrapper of information needed for Insert/Update/Delete 13 // method in SQLHandler. Refer to SQLHandler's comment below for how 14 // it is used. 15 struct TableIDRow { 16 TableIDRow(); 17 ~TableIDRow(); 18 19 URLID url_id; 20 GURL url; 21 // Whether the URL was bookmarked. 22 bool bookmarked; 23 }; 24 25 typedef std::vector<TableIDRow> TableIDRows; 26 27 // This base class is used by AndroidProviderBackend to manipulate the indvidual 28 // table or BookmarkModel in its Insert/Update/Delete method. 29 // 30 // The implementation needs to provides an array of columns. Once the columns 31 // are inserted or updated, the corresponding Insert() or Update() method will 32 // be invoked. The Delete() method is called to delete rows. 33 // 34 // The HistoryAndBookmarkRow given in Insert() or Update() provide the data for 35 // insert or update. No all the data in HistoryAndBookmarkRow maybe valid, using 36 // HistoryAndBookmarkRow::is_value_set_explicitly() method to see if the data 37 // need be inserted or updated. 38 class SQLHandler { 39 public: 40 // |columns| is the implementation's columns. 41 // |column_count| is the number of column in |columns|. 42 SQLHandler(const HistoryAndBookmarkRow::ColumnID columns[], int column_count); 43 virtual ~SQLHandler(); 44 45 // Updates the rows whose URLID or URL is in the given |ids_set| with new 46 // value stored in |row|. Return true if the update succeeds. 47 virtual bool Update(const HistoryAndBookmarkRow& row, 48 const TableIDRows& ids_set) = 0; 49 50 // Inserts the given |row|, return true on success; The id of insertted row 51 // should be set in |row|, so other implemnetations could use it to complete 52 // the insert. 53 virtual bool Insert(HistoryAndBookmarkRow* row) = 0; 54 55 // Deletes the rows whose id is in |ids_set|, returns false if any deletion 56 // failed, otherwise return true even all/some of rows are not found. 57 virtual bool Delete(const TableIDRows& ids_set) = 0; 58 59 // Return true if |row| has a value explicitly set for at least one of the 60 // columns in |row| that are known to this class. 61 bool HasColumnIn(const HistoryAndBookmarkRow& row); 62 63 // Returns true if |id| is one of the columns known to this class. 64 bool HasColumn(HistoryAndBookmarkRow::ColumnID id); 65 66 private: 67 // The columns of this handler. 68 const std::set<HistoryAndBookmarkRow::ColumnID> columns_; 69 70 DISALLOW_COPY_AND_ASSIGN(SQLHandler); 71 }; 72 73 } // namespace history. 74 75 #endif // CHROME_BROWSER_HISTORY_ANDROID_SQL_HANDLER_H_ 76