|
|
/*
|
|
|
* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
|
|
|
*
|
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
|
* you may not use this file except in compliance with the License.
|
|
|
* You may obtain a copy of the License at
|
|
|
*
|
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
|
*
|
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
|
* See the License for the specific language governing permissions and
|
|
|
* limitations under the License.
|
|
|
*/
|
|
|
|
|
|
package net.micode.notes.data;
|
|
|
|
|
|
import android.content.ContentValues;
|
|
|
import android.content.Context;
|
|
|
import android.database.sqlite.SQLiteDatabase;
|
|
|
import android.database.sqlite.SQLiteOpenHelper;
|
|
|
import android.util.Log;
|
|
|
|
|
|
import net.micode.notes.data.Notes.DataColumns;
|
|
|
import net.micode.notes.data.Notes.DataConstants;
|
|
|
import net.micode.notes.data.Notes.NoteColumns;
|
|
|
|
|
|
/**
|
|
|
* NotesDatabaseHelper类用于管理数据库的创建和升级，继承自SQLiteOpenHelper类。
|
|
|
*/
|
|
|
public class NotesDatabaseHelper extends SQLiteOpenHelper {
|
|
|
// 数据库名
|
|
|
private static final String DB_NAME = "note.db";
|
|
|
// 数据库版本
|
|
|
private static final int DB_VERSION = 4;
|
|
|
|
|
|
// 数据表的名称
|
|
|
public interface TABLE {
|
|
|
public static final String NOTE = "note";
|
|
|
public static final String DATA = "data";
|
|
|
}
|
|
|
|
|
|
private static final String TAG = "NotesDatabaseHelper";
|
|
|
|
|
|
// 单例模式
|
|
|
private static NotesDatabaseHelper mInstance;
|
|
|
|
|
|
// 创建note表的SQL语句
|
|
|
private static final String CREATE_NOTE_TABLE_SQL =
|
|
|
"CREATE TABLE " + TABLE.NOTE + "(" +
|
|
|
NoteColumns.ID + " INTEGER PRIMARY KEY," +
|
|
|
NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
|
|
|
NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," +
|
|
|
NoteColumns.BG_COLOR_ID + " INTEGER NOT NULL DEFAULT 0," +
|
|
|
NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
|
|
|
NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," +
|
|
|
NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
|
|
|
NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," +
|
|
|
NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," +
|
|
|
NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," +
|
|
|
NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," +
|
|
|
NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," +
|
|
|
NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," +
|
|
|
NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," +
|
|
|
NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
|
|
|
NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," +
|
|
|
NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" +
|
|
|
")";
|
|
|
|
|
|
// 创建data表的SQL语句
|
|
|
private static final String CREATE_DATA_TABLE_SQL =
|
|
|
"CREATE TABLE " + TABLE.DATA + "(" +
|
|
|
DataColumns.ID + " INTEGER PRIMARY KEY," +
|
|
|
DataColumns.MIME_TYPE + " TEXT NOT NULL," +
|
|
|
DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," +
|
|
|
NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
|
|
|
NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
|
|
|
DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," +
|
|
|
DataColumns.DATA1 + " INTEGER," +
|
|
|
DataColumns.DATA2 + " INTEGER," +
|
|
|
DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," +
|
|
|
DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," +
|
|
|
DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" +
|
|
|
")";
|
|
|
|
|
|
// 创建data表中NOTE_ID的索引
|
|
|
private static final String CREATE_DATA_NOTE_ID_INDEX_SQL =
|
|
|
"CREATE INDEX IF NOT EXISTS note_id_index ON " +
|
|
|
TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";
|
|
|
|
|
|
/**
|
|
|
* 增加文件夹中的笔记数，当笔记移动到该文件夹时
|
|
|
*/
|
|
|
private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
|
|
|
"CREATE TRIGGER increase_folder_count_on_update "+
|
|
|
" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
|
|
|
" BEGIN " +
|
|
|
" UPDATE " + TABLE.NOTE +
|
|
|
" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
|
|
|
" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
|
|
|
" END";
|
|
|
|
|
|
/**
|
|
|
* 减少文件夹中的笔记数，当笔记从该文件夹中移除时
|
|
|
*/
|
|
|
private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
|
|
|
"CREATE TRIGGER decrease_folder_count_on_update " +
|
|
|
" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
|
|
|
" BEGIN " +
|
|
|
" UPDATE " + TABLE.NOTE +
|
|
|
" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
|
|
|
" WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
|
|
|
" AND " + NoteColumns.NOTES_COUNT + ">0" + ";" +
|
|
|
" END";
|
|
|
|
|
|
/**
|
|
|
* 增加文件夹中的笔记数，当插入新的笔记到该文件夹时
|
|
|
*/
|
|
|
private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER =
|
|
|
"CREATE TRIGGER increase_folder_count_on_insert " +
|
|
|
" AFTER INSERT ON " + TABLE.NOTE +
|
|
|
" BEGIN " +
|
|
|
" UPDATE " + TABLE.NOTE +
|
|
|
" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
|
|
|
" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
|
|
|
" END";
|
|
|
|
|
|
/**
|
|
|
* 减少文件夹中的笔记数，当从该文件夹删除笔记时
|
|
|
*/
|
|
|
private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER =
|
|
|
"CREATE TRIGGER decrease_folder_count_on_delete " +
|
|
|
" AFTER DELETE ON " + TABLE.NOTE +
|
|
|
" BEGIN " +
|
|
|
" UPDATE " + TABLE.NOTE +
|
|
|
" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
|
|
|
" WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
|
|
|
" AND " + NoteColumns.NOTES_COUNT + ">0;" +
|
|
|
" END";
|
|
|
|
|
|
/**
|
|
|
* 当插入类型为NOTE的数据时更新笔记内容
|
|
|
*/
|
|
|
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";
|
|
|
|
|
|
/**
|
|
|
* 当类型为NOTE的数据更新时，更新笔记内容
|
|
|
*/
|
|
|
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";
|
|
|
|
|
|
/**
|
|
|
* 当类型为NOTE的数据删除时，更新笔记内容
|
|
|
*/
|
|
|
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";
|
|
|
|
|
|
/**
|
|
|
* 当笔记被删除时，删除相关数据
|
|
|
*/
|
|
|
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";
|
|
|
|
|
|
/**
|
|
|
* 当文件夹被删除时，删除该文件夹中的笔记
|
|
|
*/
|
|
|
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";
|
|
|
|
|
|
/**
|
|
|
* 获取数据库实例，确保数据库只有一个实例
|
|
|
*
|
|
|
* @param context 应用上下文
|
|
|
* @return 数据库实例
|
|
|
*/
|
|
|
public static synchronized NotesDatabaseHelper getInstance(Context context) {
|
|
|
if (mInstance == null) {
|
|
|
mInstance = new NotesDatabaseHelper(context);
|
|
|
}
|
|
|
return mInstance;
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 构造函数，初始化数据库
|
|
|
*
|
|
|
* @param context 应用上下文
|
|
|
*/
|
|
|
private NotesDatabaseHelper(Context context) {
|
|
|
super(context, DB_NAME, null, DB_VERSION);
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 创建数据库，初始化数据表
|
|
|
*
|
|
|
* @param db SQLite数据库实例
|
|
|
*/
|
|
|
@Override
|
|
|
public void onCreate(SQLiteDatabase db) {
|
|
|
Log.d(TAG, "onCreate");
|
|
|
db.execSQL(CREATE_NOTE_TABLE_SQL);
|
|
|
db.execSQL(CREATE_DATA_TABLE_SQL);
|
|
|
db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL);
|
|
|
|
|
|
db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER);
|
|
|
db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER);
|
|
|
db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER);
|
|
|
db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER);
|
|
|
|
|
|
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER);
|
|
|
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER);
|
|
|
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER);
|
|
|
|
|
|
db.execSQL(NOTE_DELETE_DATA_ON_DELETE_TRIGGER);
|
|
|
db.execSQL(FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER);
|
|
|
|
|
|
// 初始化默认文件夹
|
|
|
initDefaultFolder(db);
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 更新数据库，处理数据库版本升级
|
|
|
*
|
|
|
* @param db SQLite数据库实例
|
|
|
* @param oldVersion 旧版本号
|
|
|
* @param newVersion 新版本号
|
|
|
*/
|
|
|
@Override
|
|
|
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
|
|
|
Log.d(TAG, "onUpgrade");
|
|
|
// 这里可以根据不同版本号处理升级逻辑，当前暂时删除旧表并重新创建
|
|
|
if (oldVersion != newVersion) {
|
|
|
db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE);
|
|
|
db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA);
|
|
|
onCreate(db);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 初始化默认文件夹，在第一次创建数据库时调用
|
|
|
*
|
|
|
* @param db SQLite数据库实例
|
|
|
*/
|
|
|
private void initDefaultFolder(SQLiteDatabase db) {
|
|
|
ContentValues values = new ContentValues();
|
|
|
values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER);
|
|
|
values.put(NoteColumns.SNIPPET, "ROOT");
|
|
|
values.put(NoteColumns.TYPE, Notes.TYPE_FOLDER);
|
|
|
db.insert(TABLE.NOTE, null, values);
|
|
|
}
|
|
|
}
|
