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@ -1,5 +1,5 @@
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/*
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* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
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* Copyright (c) 2010 - 2011, The MiCode Open Source Community (www.micode.net)
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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@ -14,210 +14,290 @@
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* limitations under the License.
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*/
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// 导入包声明，指定该类所在的包为 net.micode.notes.data
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package net.micode.notes.data;
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// 导入 Android 系统中用于存储键值对的 ContentValues 类
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import android.content.ContentValues;
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// 导入 Android 系统中代表应用程序上下文的 Context 类
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import android.content.Context;
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// 导入 Android 系统中用于操作 SQLite 数据库的 SQLiteDatabase 类
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import android.database.sqlite.SQLiteDatabase;
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// 导入 Android 系统中用于创建和管理 SQLite 数据库的辅助类 SQLiteOpenHelper
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import android.database.sqlite.SQLiteOpenHelper;
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// 导入 Android 系统中用于日志记录的 Log 类
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import android.util.Log;
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// 导入 Notes 类中的 DataColumns 内部类，用于引用数据列的常量
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import net.micode.notes.data.Notes.DataColumns;
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// 导入 Notes 类中的 DataConstants 内部类，用于引用数据相关的常量
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import net.micode.notes.data.Notes.DataConstants;
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// 导入 Notes 类中的 NoteColumns 内部类，用于引用笔记列的常量
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import net.micode.notes.data.Notes.NoteColumns;
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/**
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* NotesDatabaseHelper 类继承自 SQLiteOpenHelper，用于管理笔记应用的 SQLite 数据库。
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* 它负责创建、升级数据库，定义表结构和触发器，并提供对数据库操作的辅助方法。
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*/
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public class NotesDatabaseHelper extends SQLiteOpenHelper {
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// 定义数据库的名称为 note.db
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private static final String DB_NAME = "note.db";
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// 定义数据库的版本号为 4
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private static final int DB_VERSION = 4;
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/**
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* TABLE 接口定义了数据库中表的名称常量。
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*/
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public interface TABLE {
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// 定义笔记表的名称为 note
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public static final String NOTE = "note";
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// 定义数据表的名称为 data
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public static final String DATA = "data";
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}
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// 定义日志标签，用于在 Log 中标识该类的日志信息
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private static final String TAG = "NotesDatabaseHelper";
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// 定义一个静态的 NotesDatabaseHelper 实例，用于实现单例模式
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private static NotesDatabaseHelper mInstance;
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// 定义创建笔记表的 SQL 语句
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private static final String CREATE_NOTE_TABLE_SQL =
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"CREATE TABLE " + TABLE.NOTE + "(" +
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NoteColumns.ID + " INTEGER PRIMARY KEY," +
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NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.BG_COLOR_ID + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
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NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
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NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," +
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NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," +
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NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," +
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NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" +
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")";
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"CREATE TABLE " + TABLE.NOTE + "(" +
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// 定义笔记的 ID 列，作为主键，类型为整数
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NoteColumns.ID + " INTEGER PRIMARY KEY," +
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// 定义笔记的父 ID 列，类型为整数，不可为空，默认值为 0
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NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
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// 定义笔记的提醒日期列，类型为整数，不可为空，默认值为 0
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NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," +
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// 定义笔记的背景颜色 ID 列，类型为整数，不可为空，默认值为 0
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NoteColumns.BG_COLOR_ID + " INTEGER NOT NULL DEFAULT 0," +
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// 定义笔记的创建日期列，类型为整数，不可为空，默认值为当前时间戳
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NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
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// 定义笔记是否有附件列，类型为整数，不可为空，默认值为 0
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NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," +
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// 定义笔记的修改日期列，类型为整数，不可为空，默认值为当前时间戳
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NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
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// 定义笔记的数量列，类型为整数，不可为空，默认值为 0
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NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," +
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// 定义笔记的摘要列，类型为文本，不可为空，默认值为空字符串
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NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," +
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// 定义笔记的类型列，类型为整数，不可为空，默认值为 0
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NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," +
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// 定义笔记的小部件 ID 列，类型为整数，不可为空，默认值为 0
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NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," +
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// 定义笔记的小部件类型列，类型为整数，不可为空，默认值为 -1
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NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," +
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// 定义笔记的同步 ID 列，类型为整数，不可为空，默认值为 0
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NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," +
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// 定义笔记的本地修改标记列，类型为整数，不可为空，默认值为 0
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NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," +
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// 定义笔记的原始父 ID 列，类型为整数，不可为空，默认值为 0
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NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
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// 定义笔记的 Google 任务 ID 列，类型为文本，不可为空，默认值为空字符串
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NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," +
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// 定义笔记的版本列，类型为整数，不可为空，默认值为 0
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NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" +
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")";
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// 定义创建数据表的 SQL 语句
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private static final String CREATE_DATA_TABLE_SQL =
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"CREATE TABLE " + TABLE.DATA + "(" +
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DataColumns.ID + " INTEGER PRIMARY KEY," +
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DataColumns.MIME_TYPE + " TEXT NOT NULL," +
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DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
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NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
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DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," +
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DataColumns.DATA1 + " INTEGER," +
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DataColumns.DATA2 + " INTEGER," +
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DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," +
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DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," +
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DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" +
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")";
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"CREATE TABLE " + TABLE.DATA + "(" +
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// 定义数据的 ID 列，作为主键，类型为整数
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DataColumns.ID + " INTEGER PRIMARY KEY," +
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// 定义数据的 MIME 类型列，类型为文本，不可为空
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DataColumns.MIME_TYPE + " TEXT NOT NULL," +
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// 定义数据所属笔记的 ID 列，类型为整数，不可为空，默认值为 0
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DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," +
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// 定义数据的创建日期列，类型为整数，不可为空，默认值为当前时间戳
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NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
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// 定义数据的修改日期列，类型为整数，不可为空，默认值为当前时间戳
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NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
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// 定义数据的内容列，类型为文本，不可为空，默认值为空字符串
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DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," +
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// 定义数据的第一个数据列，类型为整数
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DataColumns.DATA1 + " INTEGER," +
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// 定义数据的第二个数据列，类型为整数
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DataColumns.DATA2 + " INTEGER," +
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// 定义数据的第三个数据列，类型为文本，不可为空，默认值为空字符串
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DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," +
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// 定义数据的第四个数据列，类型为文本，不可为空，默认值为空字符串
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DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," +
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// 定义数据的第五个数据列，类型为文本，不可为空，默认值为空字符串
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DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" +
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")";
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// 定义在数据表上创建笔记 ID 索引的 SQL 语句
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private static final String CREATE_DATA_NOTE_ID_INDEX_SQL =
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"CREATE INDEX IF NOT EXISTS note_id_index ON " +
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TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";
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"CREATE INDEX IF NOT EXISTS note_id_index ON " +
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TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";
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/**
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* Increase folder's note count when move note to the folder
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* 定义一个触发器，当更新笔记的父 ID 时，增加目标文件夹的笔记数量。
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*/
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private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
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"CREATE TRIGGER increase_folder_count_on_update "+
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" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
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" BEGIN " +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
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" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
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" END";
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"CREATE TRIGGER increase_folder_count_on_update " +
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" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
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" BEGIN " +
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// 更新目标文件夹的笔记数量，使其加 1
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
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" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
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" END";
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/**
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* Decrease folder's note count when move note from folder
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* 定义一个触发器，当更新笔记的父 ID 时，减少原文件夹的笔记数量。
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*/
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private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
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"CREATE TRIGGER decrease_folder_count_on_update " +
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" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
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" BEGIN " +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
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" WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
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" AND " + NoteColumns.NOTES_COUNT + ">0" + ";" +
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" END";
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"CREATE TRIGGER decrease_folder_count_on_update " +
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" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
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" BEGIN " +
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// 更新原文件夹的笔记数量，使其减 1，但前提是数量大于 0
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
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" WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
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" AND " + NoteColumns.NOTES_COUNT + ">0" + ";" +
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" END";
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/**
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* Increase folder's note count when insert new note to the folder
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* 定义一个触发器，当插入新笔记时，增加目标文件夹的笔记数量。
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*/
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private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER =
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"CREATE TRIGGER increase_folder_count_on_insert " +
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" AFTER INSERT ON " + TABLE.NOTE +
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" BEGIN " +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
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" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
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" END";
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"CREATE TRIGGER increase_folder_count_on_insert " +
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" AFTER INSERT ON " + TABLE.NOTE +
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" BEGIN " +
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// 更新目标文件夹的笔记数量，使其加 1
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
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" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
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" END";
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/**
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* Decrease folder's note count when delete note from the folder
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* 定义一个触发器，当删除笔记时，减少原文件夹的笔记数量。
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*/
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private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER =
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"CREATE TRIGGER decrease_folder_count_on_delete " +
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" AFTER DELETE ON " + TABLE.NOTE +
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" BEGIN " +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
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" WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
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" AND " + NoteColumns.NOTES_COUNT + ">0;" +
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" END";
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"CREATE TRIGGER decrease_folder_count_on_delete " +
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" AFTER DELETE ON " + TABLE.NOTE +
|
|
|
|
|
" BEGIN " +
|
|
|
|
|
// 更新原文件夹的笔记数量，使其减 1，但前提是数量大于 0
|
|
|
|
|
" UPDATE " + TABLE.NOTE +
|
|
|
|
|
" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
|
|
|
|
|
" WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
|
|
|
|
|
" AND " + NoteColumns.NOTES_COUNT + ">0;" +
|
|
|
|
|
" END";
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Update note's content when insert data with type {@link DataConstants#NOTE}
|
|
|
|
|
* 定义一个触发器，当插入类型为 {@link DataConstants#NOTE} 的数据时，更新笔记的摘要。
|
|
|
|
|
*/
|
|
|
|
|
private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER =
|
|
|
|
|
"CREATE TRIGGER update_note_content_on_insert " +
|
|
|
|
|
" AFTER INSERT ON " + TABLE.DATA +
|
|
|
|
|
" WHEN new." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
|
|
|
|
|
" BEGIN" +
|
|
|
|
|
" UPDATE " + TABLE.NOTE +
|
|
|
|
|
" SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
|
|
|
|
|
" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
|
|
|
|
|
" END";
|
|
|
|
|
"CREATE TRIGGER update_note_content_on_insert " +
|
|
|
|
|
" AFTER INSERT ON " + TABLE.DATA +
|
|
|
|
|
" WHEN new." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
|
|
|
|
|
" BEGIN" +
|
|
|
|
|
// 更新笔记的摘要为新插入数据的内容
|
|
|
|
|
" UPDATE " + TABLE.NOTE +
|
|
|
|
|
" SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
|
|
|
|
|
" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
|
|
|
|
|
" END";
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Update note's content when data with {@link DataConstants#NOTE} type has changed
|
|
|
|
|
* 定义一个触发器，当更新类型为 {@link DataConstants#NOTE} 的数据时，更新笔记的摘要。
|
|
|
|
|
*/
|
|
|
|
|
private static final String DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER =
|
|
|
|
|
"CREATE TRIGGER update_note_content_on_update " +
|
|
|
|
|
" AFTER UPDATE ON " + TABLE.DATA +
|
|
|
|
|
" WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
|
|
|
|
|
" BEGIN" +
|
|
|
|
|
" UPDATE " + TABLE.NOTE +
|
|
|
|
|
" SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
|
|
|
|
|
" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
|
|
|
|
|
" END";
|
|
|
|
|
"CREATE TRIGGER update_note_content_on_update " +
|
|
|
|
|
" AFTER UPDATE ON " + TABLE.DATA +
|
|
|
|
|
" WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
|
|
|
|
|
" BEGIN" +
|
|
|
|
|
// 更新笔记的摘要为更新后数据的内容
|
|
|
|
|
" UPDATE " + TABLE.NOTE +
|
|
|
|
|
" SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
|
|
|
|
|
" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
|
|
|
|
|
" END";
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Update note's content when data with {@link DataConstants#NOTE} type has deleted
|
|
|
|
|
* 定义一个触发器，当删除类型为 {@link DataConstants#NOTE} 的数据时，清空笔记的摘要。
|
|
|
|
|
*/
|
|
|
|
|
private static final String DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER =
|
|
|
|
|
"CREATE TRIGGER update_note_content_on_delete " +
|
|
|
|
|
" AFTER delete ON " + TABLE.DATA +
|
|
|
|
|
" WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
|
|
|
|
|
" BEGIN" +
|
|
|
|
|
" UPDATE " + TABLE.NOTE +
|
|
|
|
|
" SET " + NoteColumns.SNIPPET + "=''" +
|
|
|
|
|
" WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" +
|
|
|
|
|
" END";
|
|
|
|
|
"CREATE TRIGGER update_note_content_on_delete " +
|
|
|
|
|
" AFTER delete ON " + TABLE.DATA +
|
|
|
|
|
" WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
|
|
|
|
|
" BEGIN" +
|
|
|
|
|
// 清空笔记的摘要
|
|
|
|
|
" UPDATE " + TABLE.NOTE +
|
|
|
|
|
" SET " + NoteColumns.SNIPPET + "=''" +
|
|
|
|
|
" WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" +
|
|
|
|
|
" END";
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Delete datas belong to note which has been deleted
|
|
|
|
|
* 定义一个触发器，当删除笔记时，删除该笔记相关的数据。
|
|
|
|
|
*/
|
|
|
|
|
private static final String NOTE_DELETE_DATA_ON_DELETE_TRIGGER =
|
|
|
|
|
"CREATE TRIGGER delete_data_on_delete " +
|
|
|
|
|
" AFTER DELETE ON " + TABLE.NOTE +
|
|
|
|
|
" BEGIN" +
|
|
|
|
|
" DELETE FROM " + TABLE.DATA +
|
|
|
|
|
" WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" +
|
|
|
|
|
" END";
|
|
|
|
|
"CREATE TRIGGER delete_data_on_delete " +
|
|
|
|
|
" AFTER DELETE ON " + TABLE.NOTE +
|
|
|
|
|
" BEGIN" +
|
|
|
|
|
// 删除与被删除笔记 ID 相同的数据
|
|
|
|
|
" DELETE FROM " + TABLE.DATA +
|
|
|
|
|
" WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" +
|
|
|
|
|
" END";
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Delete notes belong to folder which has been deleted
|
|
|
|
|
* 定义一个触发器，当删除文件夹时，删除该文件夹下的所有笔记。
|
|
|
|
|
*/
|
|
|
|
|
private static final String FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER =
|
|
|
|
|
"CREATE TRIGGER folder_delete_notes_on_delete " +
|
|
|
|
|
" AFTER DELETE ON " + TABLE.NOTE +
|
|
|
|
|
" BEGIN" +
|
|
|
|
|
" DELETE FROM " + TABLE.NOTE +
|
|
|
|
|
" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
|
|
|
|
|
" END";
|
|
|
|
|
"CREATE TRIGGER folder_delete_notes_on_delete " +
|
|
|
|
|
" AFTER DELETE ON " + TABLE.NOTE +
|
|
|
|
|
" BEGIN" +
|
|
|
|
|
// 删除父 ID 等于被删除文件夹 ID 的所有笔记
|
|
|
|
|
" DELETE FROM " + TABLE.NOTE +
|
|
|
|
|
" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
|
|
|
|
|
" END";
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Move notes belong to folder which has been moved to trash folder
|
|
|
|
|
* 定义一个触发器，当文件夹被移动到回收站时，将该文件夹下的所有笔记也移动到回收站。
|
|
|
|
|
*/
|
|
|
|
|
private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER =
|
|
|
|
|
"CREATE TRIGGER folder_move_notes_on_trash " +
|
|
|
|
|
" AFTER UPDATE ON " + TABLE.NOTE +
|
|
|
|
|
" WHEN new." + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
|
|
|
|
|
" BEGIN" +
|
|
|
|
|
" UPDATE " + TABLE.NOTE +
|
|
|
|
|
" SET " + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
|
|
|
|
|
" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
|
|
|
|
|
" END";
|
|
|
|
|
"CREATE TRIGGER folder_move_notes_on_trash " +
|
|
|
|
|
" AFTER UPDATE ON " + TABLE.NOTE +
|
|
|
|
|
" WHEN new." + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
|
|
|
|
|
" BEGIN" +
|
|
|
|
|
// 将父 ID 等于被移动文件夹 ID 的所有笔记的父 ID 也设置为回收站 ID
|
|
|
|
|
" UPDATE " + TABLE.NOTE +
|
|
|
|
|
" SET " + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
|
|
|
|
|
" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
|
|
|
|
|
" END";
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 构造函数，用于创建 NotesDatabaseHelper 实例。
|
|
|
|
|
*
|
|
|
|
|
* @param context 应用程序上下文
|
|
|
|
|
*/
|
|
|
|
|
public NotesDatabaseHelper(Context context) {
|
|
|
|
|
// 调用父类 SQLiteOpenHelper 的构造函数，传入上下文、数据库名称、游标工厂和数据库版本
|
|
|
|
|
super(context, DB_NAME, null, DB_VERSION);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 创建笔记表，并重新创建相关触发器，同时创建系统文件夹。
|
|
|
|
|
*
|
|
|
|
|
* @param db SQLite 数据库实例
|
|
|
|
|
*/
|
|
|
|
|
public void createNoteTable(SQLiteDatabase db) {
|
|
|
|
|
// 执行创建笔记表的 SQL 语句
|
|
|
|
|
db.execSQL(CREATE_NOTE_TABLE_SQL);
|
|
|
|
|
// 重新创建笔记表的触发器
|
|
|
|
|
reCreateNoteTableTriggers(db);
|
|
|
|
|
// 创建系统文件夹
|
|
|
|
|
createSystemFolder(db);
|
|
|
|
|
// 记录日志，表示笔记表已创建
|
|
|
|
|
Log.d(TAG, "note table has been created");
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 重新创建笔记表的触发器。
|
|
|
|
|
*
|
|
|
|
|
* @param db SQLite 数据库实例
|
|
|
|
|
*/
|
|
|
|
|
private void reCreateNoteTableTriggers(SQLiteDatabase db) {
|
|
|
|
|
// 删除所有相关的旧触发器
|
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_update");
|
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_update");
|
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_delete");
|
|
|
|
|
@ -226,6 +306,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
|
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS folder_delete_notes_on_delete");
|
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS folder_move_notes_on_trash");
|
|
|
|
|
|
|
|
|
|
// 创建新的触发器
|
|
|
|
|
db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER);
|
|
|
|
|
db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER);
|
|
|
|
|
db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER);
|
|
|
|
|
@ -235,128 +316,222 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
|
|
|
|
|
db.execSQL(FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 创建系统文件夹，包括通话记录文件夹、根文件夹、临时文件夹和回收站文件夹。
|
|
|
|
|
*
|
|
|
|
|
* @param db SQLite 数据库实例
|
|
|
|
|
*/
|
|
|
|
|
private void createSystemFolder(SQLiteDatabase db) {
|
|
|
|
|
// 创建 ContentValues 对象，用于存储要插入的数据
|
|
|
|
|
ContentValues values = new ContentValues();
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* call record foler for call notes
|
|
|
|
|
* 创建通话记录文件夹，用于存储通话笔记
|
|
|
|
|
*/
|
|
|
|
|
// 设置通话记录文件夹的 ID
|
|
|
|
|
values.put(NoteColumns.ID, Notes.ID_CALL_RECORD_FOLDER);
|
|
|
|
|
// 设置通话记录文件夹的类型为系统文件夹
|
|
|
|
|
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
|
|
|
|
|
// 插入通话记录文件夹到笔记表
|
|
|
|
|
db.insert(TABLE.NOTE, null, values);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* root folder which is default folder
|
|
|
|
|
* 创建根文件夹，作为默认文件夹
|
|
|
|
|
*/
|
|
|
|
|
// 清空 ContentValues 对象
|
|
|
|
|
values.clear();
|
|
|
|
|
// 设置根文件夹的 ID
|
|
|
|
|
values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER);
|
|
|
|
|
// 设置根文件夹的类型为系统文件夹
|
|
|
|
|
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
|
|
|
|
|
// 插入根文件夹到笔记表
|
|
|
|
|
db.insert(TABLE.NOTE, null, values);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* temporary folder which is used for moving note
|
|
|
|
|
* 创建临时文件夹，用于移动笔记
|
|
|
|
|
*/
|
|
|
|
|
// 清空 ContentValues 对象
|
|
|
|
|
values.clear();
|
|
|
|
|
// 设置临时文件夹的 ID
|
|
|
|
|
values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER);
|
|
|
|
|
// 设置临时文件夹的类型为系统文件夹
|
|
|
|
|
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
|
|
|
|
|
// 插入临时文件夹到笔记表
|
|
|
|
|
db.insert(TABLE.NOTE, null, values);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* create trash folder
|
|
|
|
|
* 创建回收站文件夹
|
|
|
|
|
*/
|
|
|
|
|
// 清空 ContentValues 对象
|
|
|
|
|
values.clear();
|
|
|
|
|
// 设置回收站文件夹的 ID
|
|
|
|
|
values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
|
|
|
|
|
// 设置回收站文件夹的类型为系统文件夹
|
|
|
|
|
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
|
|
|
|
|
// 插入回收站文件夹到笔记表
|
|
|
|
|
db.insert(TABLE.NOTE, null, values);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 创建数据表，并重新创建相关触发器，同时创建笔记 ID 索引。
|
|
|
|
|
*
|
|
|
|
|
* @param db SQLite 数据库实例
|
|
|
|
|
*/
|
|
|
|
|
public void createDataTable(SQLiteDatabase db) {
|
|
|
|
|
// 执行创建数据表的 SQL 语句
|
|
|
|
|
db.execSQL(CREATE_DATA_TABLE_SQL);
|
|
|
|
|
// 重新创建数据表的触发器
|
|
|
|
|
reCreateDataTableTriggers(db);
|
|
|
|
|
// 执行创建笔记 ID 索引的 SQL 语句
|
|
|
|
|
db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL);
|
|
|
|
|
// 记录日志，表示数据表已创建
|
|
|
|
|
Log.d(TAG, "data table has been created");
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 重新创建数据表的触发器。
|
|
|
|
|
*
|
|
|
|
|
* @param db SQLite 数据库实例
|
|
|
|
|
*/
|
|
|
|
|
private void reCreateDataTableTriggers(SQLiteDatabase db) {
|
|
|
|
|
// 删除所有相关的旧触发器
|
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_insert");
|
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_update");
|
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_delete");
|
|
|
|
|
|
|
|
|
|
// 创建新的触发器
|
|
|
|
|
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER);
|
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|
|
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER);
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|
|
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER);
|
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|
|
}
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|
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|
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|
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|
|
|
/**
|
|
|
|
|
* 获取 NotesDatabaseHelper 的单例实例。
|
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|
|
|
*
|
|
|
|
|
* @param context 应用程序上下文
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|
|
* @return NotesDatabaseHelper 实例
|
|
|
|
|
*/
|
|
|
|
|
static synchronized NotesDatabaseHelper getInstance(Context context) {
|
|
|
|
|
// 如果实例为空，则创建一个新的实例
|
|
|
|
|
if (mInstance == null) {
|
|
|
|
|
mInstance = new NotesDatabaseHelper(context);
|
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|
|
|
}
|
|
|
|
|
// 返回实例
|
|
|
|
|
return mInstance;
|
|
|
|
|
}
|
|
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|
|
|
|
|
|
|
/**
|
|
|
|
|
* 当数据库首次创建时调用，用于创建笔记表和数据表。
|
|
|
|
|
*
|
|
|
|
|
* @param db SQLite 数据库实例
|
|
|
|
|
*/
|
|
|
|
|
@Override
|
|
|
|
|
public void onCreate(SQLiteDatabase db) {
|
|
|
|
|
// 创建笔记表
|
|
|
|
|
createNoteTable(db);
|
|
|
|
|
// 创建数据表
|
|
|
|
|
createDataTable(db);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 当数据库版本更新时调用，用于升级数据库。
|
|
|
|
|
*
|
|
|
|
|
* @param db SQLite 数据库实例
|
|
|
|
|
* @param oldVersion 旧的数据库版本号
|
|
|
|
|
* @param newVersion 新的数据库版本号
|
|
|
|
|
*/
|
|
|
|
|
@Override
|
|
|
|
|
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
|
|
|
|
|
// 标记是否需要重新创建触发器
|
|
|
|
|
boolean reCreateTriggers = false;
|
|
|
|
|
// 标记是否跳过从版本 2 到版本 3 的升级
|
|
|
|
|
boolean skipV2 = false;
|
|
|
|
|
|
|
|
|
|
// 如果旧版本为 1，则升级到版本 2
|
|
|
|
|
if (oldVersion == 1) {
|
|
|
|
|
upgradeToV2(db);
|
|
|
|
|
skipV2 = true; // this upgrade including the upgrade from v2 to v3
|
|
|
|
|
// 标记跳过从版本 2 到版本 3 的升级
|
|
|
|
|
skipV2 = true;
|
|
|
|
|
// 旧版本号加 1
|
|
|
|
|
oldVersion++;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 如果旧版本为 2 且未跳过升级，则升级到版本 3
|
|
|
|
|
if (oldVersion == 2 && !skipV2) {
|
|
|
|
|
upgradeToV3(db);
|
|
|
|
|
// 标记需要重新创建触发器
|
|
|
|
|
reCreateTriggers = true;
|
|
|
|
|
// 旧版本号加 1
|
|
|
|
|
oldVersion++;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 如果旧版本为 3，则升级到版本 4
|
|
|
|
|
if (oldVersion == 3) {
|
|
|
|
|
upgradeToV4(db);
|
|
|
|
|
// 旧版本号加 1
|
|
|
|
|
oldVersion++;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 如果需要重新创建触发器，则重新创建笔记表和数据表的触发器
|
|
|
|
|
if (reCreateTriggers) {
|
|
|
|
|
reCreateNoteTableTriggers(db);
|
|
|
|
|
reCreateDataTableTriggers(db);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 如果升级后版本号不等于新版本号，则抛出异常
|
|
|
|
|
if (oldVersion != newVersion) {
|
|
|
|
|
throw new IllegalStateException("Upgrade notes database to version " + newVersion
|
|
|
|
|
+ "fails");
|
|
|
|
|
+ " fails");
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 将数据库从版本 1 升级到版本 2。
|
|
|
|
|
*
|
|
|
|
|
* @param db SQLite 数据库实例
|
|
|
|
|
*/
|
|
|
|
|
private void upgradeToV2(SQLiteDatabase db) {
|
|
|
|
|
// 删除笔记表
|
|
|
|
|
db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE);
|
|
|
|
|
// 删除数据表
|
|
|
|
|
db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA);
|
|
|
|
|
// 重新创建笔记表
|
|
|
|
|
createNoteTable(db);
|
|
|
|
|
// 重新创建数据表
|
|
|
|
|
createDataTable(db);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 将数据库从版本 2 升级到版本 3。
|
|
|
|
|
*
|
|
|
|
|
* @param db SQLite 数据库实例
|
|
|
|
|
*/
|
|
|
|
|
private void upgradeToV3(SQLiteDatabase db) {
|
|
|
|
|
// drop unused triggers
|
|
|
|
|
// 删除无用的触发器
|
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_insert");
|
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_delete");
|
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_update");
|
|
|
|
|
// add a column for gtask id
|
|
|
|
|
// 在笔记表中添加 Google 任务 ID 列
|
|
|
|
|
db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.GTASK_ID
|
|
|
|
|
+ " TEXT NOT NULL DEFAULT ''");
|
|
|
|
|
// add a trash system folder
|
|
|
|
|
// 创建 ContentValues 对象，用于存储要插入的数据
|
|
|
|
|
ContentValues values = new ContentValues();
|
|
|
|
|
// 设置回收站文件夹的 ID
|
|
|
|
|
values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
|
|
|
|
|
// 设置回收站文件夹的类型为系统文件夹
|
|
|
|
|
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
|
|
|
|
|
// 插入回收站文件夹到笔记表
|
|
|
|
|
db.insert(TABLE.NOTE, null, values);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 将数据库从版本 3 升级到版本 4。
|
|
|
|
|
*
|
|
|
|
|
* @param db SQLite 数据库实例
|
|
|
|
|
*/
|
|
|
|
|
private void upgradeToV4(SQLiteDatabase db) {
|
|
|
|
|
// 在笔记表中添加版本列
|
|
|
|
|
db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION
|
|
|
|
|
+ " INTEGER NOT NULL DEFAULT 0");
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
