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/*
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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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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package net.micode.notes.gtask.data;
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import android.appwidget.AppWidgetManager;
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import android.content.ContentResolver;
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import android.content.ContentValues;
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import android.content.Context;
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import android.database.Cursor;
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import android.net.Uri;
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import android.util.Log;
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import net.micode.notes.data.Notes;
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import net.micode.notes.data.Notes.DataColumns;
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import net.micode.notes.data.Notes.NoteColumns;
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import net.micode.notes.gtask.exception.ActionFailureException;
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import net.micode.notes.tool.GTaskStringUtils;
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import net.micode.notes.tool.ResourceParser;
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import org.json.JSONArray;
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import org.json.JSONException;
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import org.json.JSONObject;
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import java.util.ArrayList;
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public class SqlNote {//调用getSimpleName ()函数得到类的简写名称存入字符串TAG中
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private static final String TAG = SqlNote.class.getSimpleName();
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private static final int INVALID_ID = -99999;//将INVALID_ID 初始化为-99999
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public static final String[] PROJECTION_NOTE = new String[] {//集合了interface NoteColumns中所有17个SF常量
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NoteColumns.ID, NoteColumns.ALERTED_DATE, NoteColumns.BG_COLOR_ID,
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NoteColumns.CREATED_DATE, NoteColumns.HAS_ATTACHMENT, NoteColumns.MODIFIED_DATE,
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NoteColumns.NOTES_COUNT, NoteColumns.PARENT_ID, NoteColumns.SNIPPET, NoteColumns.TYPE,
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NoteColumns.WIDGET_ID, NoteColumns.WIDGET_TYPE, NoteColumns.SYNC_ID,
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NoteColumns.LOCAL_MODIFIED, NoteColumns.ORIGIN_PARENT_ID, NoteColumns.GTASK_ID,
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NoteColumns.VERSION
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};//以下设置17个列的编号
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public static final int ID_COLUMN = 0;//提醒时间
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public static final int ALERTED_DATE_COLUMN = 1;//note的背景颜色
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public static final int BG_COLOR_ID_COLUMN = 2;
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public static final int CREATED_DATE_COLUMN = 3;
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public static final int HAS_ATTACHMENT_COLUMN = 4;//最近修改时间
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public static final int MODIFIED_DATE_COLUMN = 5;
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public static final int NOTES_COUNT_COLUMN = 6;
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public static final int PARENT_ID_COLUMN = 7;
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public static final int SNIPPET_COLUMN = 8;
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public static final int TYPE_COLUMN = 9;
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public static final int WIDGET_ID_COLUMN = 10;
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public static final int WIDGET_TYPE_COLUMN = 11;
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public static final int SYNC_ID_COLUMN = 12;
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public static final int LOCAL_MODIFIED_COLUMN = 13;
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public static final int ORIGIN_PARENT_ID_COLUMN = 14;
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public static final int GTASK_ID_COLUMN = 15;
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public static final int VERSION_COLUMN = 16;
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private Context mContext;//以下定义了17个内部变量，其中12个可以由content获得，5个需要初始化为0或者new
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private ContentResolver mContentResolver;
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private boolean mIsCreate;
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private long mId;//通过ArrayList记录note中的data
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private long mAlertDate;
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private int mBgColorId;
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private long mCreatedDate;
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private int mHasAttachment;
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private long mModifiedDate;
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private long mParentId;
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private String mSnippet;
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private int mType;
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private int mWidgetId;
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private int mWidgetType;
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private long mOriginParent;
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private long mVersion;
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private ContentValues mDiffNoteValues;
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private ArrayList<SqlData> mDataList;
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public SqlNote(Context context) {//构造函数，参数只有context，初始化新建的对象中的所有变量
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mContext = context;
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mContentResolver = context.getContentResolver();
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mIsCreate = true;
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mId = INVALID_ID;//无效用户
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mAlertDate = 0;
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mBgColorId = ResourceParser.getDefaultBgId(context);//系统默认背景
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mCreatedDate = System.currentTimeMillis();
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mHasAttachment = 0;//调用系统函数获得创建时间
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mModifiedDate = System.currentTimeMillis();
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mParentId = 0;
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mSnippet = "";
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mType = Notes.TYPE_NOTE;
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mWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID;
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mWidgetType = Notes.TYPE_WIDGET_INVALIDE;
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mOriginParent = 0;
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mVersion = 0;
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mDiffNoteValues = new ContentValues();
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mDataList = new ArrayList<SqlData>();//新建一个data的列表
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}
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public SqlNote(Context context, Cursor c) {//构造函数，参数有context和cursor，对cursor指向的对象进行初始化
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mContext = context;
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mContentResolver = context.getContentResolver();
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mIsCreate = false;
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loadFromCursor(c);
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mDataList = new ArrayList<SqlData>();
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if (mType == Notes.TYPE_NOTE)//如果是note类型，则调用下面的 loadDataContent()函数，加载数据内容
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loadDataContent();
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mDiffNoteValues = new ContentValues();
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}
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public SqlNote(Context context, long id) {//第三种构造方式，采用context和id
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mContext = context;
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mContentResolver = context.getContentResolver();
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mIsCreate = false;
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loadFromCursor(id);//调用下面的 loadFromCursor函数，通过ID从光标处加载数据
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mDataList = new ArrayList<SqlData>();
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if (mType == Notes.TYPE_NOTE)
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loadDataContent();
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mDiffNoteValues = new ContentValues();
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}
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private void loadFromCursor(long id) {//通过id从光标处加载数据
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Cursor c = null;
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try {
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c = mContentResolver.query(Notes.CONTENT_NOTE_URI, PROJECTION_NOTE, "(_id=?)",//通过id获取ContentResolver中的相应内容，并赋给cursor
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new String[] {
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String.valueOf(id)
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}, null);//如果获取成功，则cursor移动到下一条记录，并加载该记录
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if (c != null) {
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c.moveToNext();
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loadFromCursor(c);
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} else {
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Log.w(TAG, "loadFromCursor: cursor = null");
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}
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} finally {
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if (c != null)
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c.close();
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}
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}
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private void loadFromCursor(Cursor c) {//通过游标从光标处加载数据
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mId = c.getLong(ID_COLUMN);
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mAlertDate = c.getLong(ALERTED_DATE_COLUMN);
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mBgColorId = c.getInt(BG_COLOR_ID_COLUMN);
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mCreatedDate = c.getLong(CREATED_DATE_COLUMN);
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mHasAttachment = c.getInt(HAS_ATTACHMENT_COLUMN);
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mModifiedDate = c.getLong(MODIFIED_DATE_COLUMN);
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mParentId = c.getLong(PARENT_ID_COLUMN);
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mSnippet = c.getString(SNIPPET_COLUMN);
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mType = c.getInt(TYPE_COLUMN);
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mWidgetId = c.getInt(WIDGET_ID_COLUMN);
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mWidgetType = c.getInt(WIDGET_TYPE_COLUMN);
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mVersion = c.getLong(VERSION_COLUMN);
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}
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//获取ID对应content内容，如果查询到该note的id确实有对应项，即cursor有对应，获取ID对应content内容
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private void loadDataContent() {//通过content机制获取共享数据并加载到数据库当前游标处
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Cursor c = null;
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mDataList.clear();
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try {//获取ID对应content内容
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c = mContentResolver.query(Notes.CONTENT_DATA_URI, SqlData.PROJECTION_DATA,//获得该ID对应的数据内容
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"(note_id=?)", new String[] {
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String.valueOf(mId)
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}, null);//查询到该note的id确实有对应项，即cursor有对应
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if (c != null) {
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if (c.getCount() == 0) {
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Log.w(TAG, "it seems that the note has not data");
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return;
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}
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while (c.moveToNext()) {//记录数量不为0，则循环直到记录不存在，不断地取出记录放到DataList中
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SqlData data = new SqlData(mContext, c);
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mDataList.add(data);
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}
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} else {
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Log.w(TAG, "loadDataContent: cursor = null");
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}
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} finally {//论如何，最后需要关闭数据库游标
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if (c != null)
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c.close();
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}
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}
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public boolean setContent(JSONObject js) {//设置通过content机制共享的数据信息
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try {
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JSONObject note = js.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
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if (note.getInt(NoteColumns.TYPE) == Notes.TYPE_SYSTEM) {//不能设置系统文件
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Log.w(TAG, "cannot set system folder");//警告
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} else if (note.getInt(NoteColumns.TYPE) == Notes.TYPE_FOLDER) {//文件夹只能更新摘要和类型
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// for folder we can only update the snnipet and type
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String snippet = note.has(NoteColumns.SNIPPET) ? note//语句：如果共享数据存在摘要，则将其赋给snippet变量，否则该变量为空
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.getString(NoteColumns.SNIPPET) : "";
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if (mIsCreate || !mSnippet.equals(snippet)) {
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mDiffNoteValues.put(NoteColumns.SNIPPET, snippet);
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}
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mSnippet = snippet;//将该摘要覆盖原摘要
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int type = note.has(NoteColumns.TYPE) ? note.getInt(NoteColumns.TYPE)//以下操作都和上面对snippet的操作一样，一起根据共享的数据设置SqlNote内容的上述17项
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: Notes.TYPE_NOTE;
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if (mIsCreate || mType != type) {//如果是新建的或 type 不匹配
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mDiffNoteValues.put(NoteColumns.TYPE, type);
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}
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mType = type;
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} else if (note.getInt(NoteColumns.TYPE) == Notes.TYPE_NOTE) {
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JSONArray dataArray = js.getJSONArray(GTaskStringUtils.META_HEAD_DATA);
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long id = note.has(NoteColumns.ID) ? note.getLong(NoteColumns.ID) : INVALID_ID;//获取其提示日期
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if (mIsCreate || mId != id) {
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mDiffNoteValues.put(NoteColumns.ID, id);
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}
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mId = id;
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long alertDate = note.has(NoteColumns.ALERTED_DATE) ? note//获取数据的提醒日期
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.getLong(NoteColumns.ALERTED_DATE) : 0;
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if (mIsCreate || mAlertDate != alertDate) {
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mDiffNoteValues.put(NoteColumns.ALERTED_DATE, alertDate);
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}
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mAlertDate = alertDate;
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int bgColorId = note.has(NoteColumns.BG_COLOR_ID) ? note//获取数据的背景颜色
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.getInt(NoteColumns.BG_COLOR_ID) : ResourceParser.getDefaultBgId(mContext);
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if (mIsCreate || mBgColorId != bgColorId) {//如果只是通过上下文对note进行数据库操作，或者该背景颜色与原背景颜色不相同，
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mDiffNoteValues.put(NoteColumns.BG_COLOR_ID, bgColorId);
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}
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mBgColorId = bgColorId;
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long createDate = note.has(NoteColumns.CREATED_DATE) ? note//对创建日期操作
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.getLong(NoteColumns.CREATED_DATE) : System.currentTimeMillis();
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if (mIsCreate || mCreatedDate != createDate) {//如果只是通过上下文对note进行数据库操作，或者该创建日期与原创建日期不相同，
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mDiffNoteValues.put(NoteColumns.CREATED_DATE, createDate);//将该创建日期保存在mDiffNoteValue这个变量中，说明这两个值不相同
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}
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mCreatedDate = createDate;//将该创建日期覆盖原创建日期
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int hasAttachment = note.has(NoteColumns.HAS_ATTACHMENT) ? note
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.getInt(NoteColumns.HAS_ATTACHMENT) : 0;
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if (mIsCreate || mHasAttachment != hasAttachment) {//如果只是通过上下文对note进行数据库操作，或者该有无附件的布尔值与原有无附件的布尔值不相同，
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mDiffNoteValues.put(NoteColumns.HAS_ATTACHMENT, hasAttachment);
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}
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mHasAttachment = hasAttachment;
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long modifiedDate = note.has(NoteColumns.MODIFIED_DATE) ? note//对最近修改日期操作
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.getLong(NoteColumns.MODIFIED_DATE) : System.currentTimeMillis();
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if (mIsCreate || mModifiedDate != modifiedDate) {//如果只是通过上下文对note进行数据库操作，或者该修改日期与原修改日期不相同，
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mDiffNoteValues.put(NoteColumns.MODIFIED_DATE, modifiedDate);
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}
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mModifiedDate = modifiedDate;
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long parentId = note.has(NoteColumns.PARENT_ID) ? note
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.getLong(NoteColumns.PARENT_ID) : 0;
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if (mIsCreate || mParentId != parentId) {
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mDiffNoteValues.put(NoteColumns.PARENT_ID, parentId);
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}
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mParentId = parentId;
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String snippet = note.has(NoteColumns.SNIPPET) ? note
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.getString(NoteColumns.SNIPPET) : "";
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if (mIsCreate || !mSnippet.equals(snippet)) {//如果只是通过上下文对note进行数据库操作，或者该文本片段与原文本片段不相同，
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mDiffNoteValues.put(NoteColumns.SNIPPET, snippet);
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}
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mSnippet = snippet;
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int type = note.has(NoteColumns.TYPE) ? note.getInt(NoteColumns.TYPE)//获取数据的文件类型，
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: Notes.TYPE_NOTE;
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if (mIsCreate || mType != type) {
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mDiffNoteValues.put(NoteColumns.TYPE, type);
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}
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mType = type;
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int widgetId = note.has(NoteColumns.WIDGET_ID) ? note.getInt(NoteColumns.WIDGET_ID)//对控件操作
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: AppWidgetManager.INVALID_APPWIDGET_ID;
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if (mIsCreate || mWidgetId != widgetId) {
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mDiffNoteValues.put(NoteColumns.WIDGET_ID, widgetId);//将该小部件ID保存在mDiffNoteValue这个变量中，说明这两个值不相同
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}
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mWidgetId = widgetId;
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int widgetType = note.has(NoteColumns.WIDGET_TYPE) ? note// 获取数据的小部件种类
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.getInt(NoteColumns.WIDGET_TYPE) : Notes.TYPE_WIDGET_INVALIDE;
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if (mIsCreate || mWidgetType != widgetType) {
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mDiffNoteValues.put(NoteColumns.WIDGET_TYPE, widgetType);
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}
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mWidgetType = widgetType;//将该小部件种类覆盖原小部件种类
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long originParent = note.has(NoteColumns.ORIGIN_PARENT_ID) ? note
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.getLong(NoteColumns.ORIGIN_PARENT_ID) : 0;
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if (mIsCreate || mOriginParent != originParent) {//如果只是通过上下文对note进行数据库操作，或者该原始父文件夹ID与原原始父文件夹ID不相同，
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mDiffNoteValues.put(NoteColumns.ORIGIN_PARENT_ID, originParent);
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}
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mOriginParent = originParent;
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for (int i = 0; i < dataArray.length(); i++) {
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JSONObject data = dataArray.getJSONObject(i);
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SqlData sqlData = null;
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if (data.has(DataColumns.ID)) {//该数据ID对应的数据如果存在，将对应的数据存在数据库中
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long dataId = data.getLong(DataColumns.ID);
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for (SqlData temp : mDataList) {
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if (dataId == temp.getId()) {
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sqlData = temp;
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}
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}
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}
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if (sqlData == null) {
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sqlData = new SqlData(mContext);
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mDataList.add(sqlData);
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}
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sqlData.setContent(data);//最后为数据库数据进行设置
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}
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}
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} catch (JSONException e) {//出现JSONException时，日志显示错误，同时打印堆栈轨迹
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Log.e(TAG, e.toString());//获取异常类型和异常详细消息
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e.printStackTrace();
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return false;
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}
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return true;
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}
|
|
|
//获取content机制提供的数据并加载到note中
|
|
|
public JSONObject getContent() {//获取content机制提供的数据并加载到note中
|
|
|
try {
|
|
|
JSONObject js = new JSONObject();
|
|
|
|
|
|
if (mIsCreate) {
|
|
|
Log.e(TAG, "it seems that we haven't created this in database yet");
|
|
|
return null;
|
|
|
}
|
|
|
|
|
|
JSONObject note = new JSONObject();//新建变量note用于传输共享数据
|
|
|
if (mType == Notes.TYPE_NOTE) {//note类型
|
|
|
note.put(NoteColumns.ID, mId);
|
|
|
note.put(NoteColumns.ALERTED_DATE, mAlertDate);
|
|
|
note.put(NoteColumns.BG_COLOR_ID, mBgColorId);//背景颜色ID
|
|
|
note.put(NoteColumns.CREATED_DATE, mCreatedDate);//创建日期
|
|
|
note.put(NoteColumns.HAS_ATTACHMENT, mHasAttachment);
|
|
|
note.put(NoteColumns.MODIFIED_DATE, mModifiedDate);
|
|
|
note.put(NoteColumns.PARENT_ID, mParentId);
|
|
|
note.put(NoteColumns.SNIPPET, mSnippet);
|
|
|
note.put(NoteColumns.TYPE, mType);
|
|
|
note.put(NoteColumns.WIDGET_ID, mWidgetId);
|
|
|
note.put(NoteColumns.WIDGET_TYPE, mWidgetType);
|
|
|
note.put(NoteColumns.ORIGIN_PARENT_ID, mOriginParent);
|
|
|
js.put(GTaskStringUtils.META_HEAD_NOTE, note);
|
|
|
|
|
|
JSONArray dataArray = new JSONArray();//获取数据库数据，并存入数组中
|
|
|
for (SqlData sqlData : mDataList) {//将note中的data全部存入JSONArray中
|
|
|
JSONObject data = sqlData.getContent();
|
|
|
if (data != null) {
|
|
|
dataArray.put(data);//再将这个JSONArray对应共享数据mata，按键值对存入共享
|
|
|
}
|
|
|
}
|
|
|
js.put(GTaskStringUtils.META_HEAD_DATA, dataArray);//将元数据存入数组中
|
|
|
} else if (mType == Notes.TYPE_FOLDER || mType == Notes.TYPE_SYSTEM) {//类型为系统文件或目录文件时
|
|
|
note.put(NoteColumns.ID, mId);//将id，类型，以及摘要，存入jsonobject,然后对应META_HEAD_NOTE键，存入共享
|
|
|
note.put(NoteColumns.TYPE, mType);
|
|
|
note.put(NoteColumns.SNIPPET, mSnippet);
|
|
|
js.put(GTaskStringUtils.META_HEAD_NOTE, note);//并存入元便签中
|
|
|
}
|
|
|
|
|
|
return js;
|
|
|
} catch (JSONException e) {//如果出现异常，则报错
|
|
|
Log.e(TAG, e.toString());
|
|
|
e.printStackTrace();
|
|
|
}
|
|
|
return null;
|
|
|
}
|
|
|
|
|
|
public void setParentId(long id) {
|
|
|
mParentId = id;
|
|
|
mDiffNoteValues.put(NoteColumns.PARENT_ID, id);
|
|
|
}
|
|
|
//设置当前ID的gtask的ID
|
|
|
public void setGtaskId(String gid) {
|
|
|
mDiffNoteValues.put(NoteColumns.GTASK_ID, gid);
|
|
|
}
|
|
|
//同步id
|
|
|
public void setSyncId(long syncId) {
|
|
|
mDiffNoteValues.put(NoteColumns.SYNC_ID, syncId);
|
|
|
}
|
|
|
|
|
|
public void resetLocalModified() {
|
|
|
mDiffNoteValues.put(NoteColumns.LOCAL_MODIFIED, 0);
|
|
|
}//初始化本地修改，即撤销所有当前修改
|
|
|
|
|
|
public long getId() {
|
|
|
return mId;
|
|
|
}//获得当前id
|
|
|
|
|
|
public long getParentId() {
|
|
|
return mParentId;
|
|
|
}//获得当前id的父id
|
|
|
|
|
|
public String getSnippet() {
|
|
|
return mSnippet;
|
|
|
}//获取小片段即用于显示的部分便签内容
|
|
|
|
|
|
public boolean isNoteType() {
|
|
|
return mType == Notes.TYPE_NOTE;
|
|
|
}//判断是否为便签类型
|
|
|
//将修改之后的数据上传
|
|
|
public void commit(boolean validateVersion) {
|
|
|
if (mIsCreate) {
|
|
|
if (mId == INVALID_ID && mDiffNoteValues.containsKey(NoteColumns.ID)) {
|
|
|
mDiffNoteValues.remove(NoteColumns.ID);//那么就把这个ID移出便签列
|
|
|
}
|
|
|
|
|
|
Uri uri = mContentResolver.insert(Notes.CONTENT_NOTE_URI, mDiffNoteValues);//插入该便签的uri
|
|
|
try {
|
|
|
mId = Long.valueOf(uri.getPathSegments().get(1));
|
|
|
} catch (NumberFormatException e) {//捕获异常，转换出错，显示错误“获取note的id出现错误”
|
|
|
Log.e(TAG, "Get note id error :" + e.toString());
|
|
|
throw new ActionFailureException("create note failed");//抛出异常，创建 note 失败
|
|
|
}
|
|
|
if (mId == 0) {
|
|
|
throw new IllegalStateException("Create thread id failed");
|
|
|
}
|
|
|
|
|
|
if (mType == Notes.TYPE_NOTE) {//对于note类型，引用sqlData.commit方法操作
|
|
|
for (SqlData sqlData : mDataList) {
|
|
|
sqlData.commit(mId, false, -1);
|
|
|
}
|
|
|
}
|
|
|
} else {
|
|
|
if (mId <= 0 && mId != Notes.ID_ROOT_FOLDER && mId != Notes.ID_CALL_RECORD_FOLDER) {//判断是否含有这个便签
|
|
|
Log.e(TAG, "No such note");
|
|
|
throw new IllegalStateException("Try to update note with invalid id");//尝试以无效 id 更新 note
|
|
|
}
|
|
|
if (mDiffNoteValues.size() > 0) {
|
|
|
mVersion ++;//更新版本：版本升级一个等级
|
|
|
int result = 0;
|
|
|
if (!validateVersion) {
|
|
|
result = mContentResolver.update(Notes.CONTENT_NOTE_URI, mDiffNoteValues, "("
|
|
|
+ NoteColumns.ID + "=?)", new String[] {//构造字符串
|
|
|
String.valueOf(mId)
|
|
|
});
|
|
|
} else {
|
|
|
result = mContentResolver.update(Notes.CONTENT_NOTE_URI, mDiffNoteValues, "("//构造字符串失败
|
|
|
+ NoteColumns.ID + "=?) AND (" + NoteColumns.VERSION + "<=?)",
|
|
|
new String[] {
|
|
|
String.valueOf(mId), String.valueOf(mVersion)
|
|
|
});
|
|
|
}
|
|
|
if (result == 0) {//如果内容解析器没有更新，那么报错：没有更新，或许用户在同步时进行更新
|
|
|
Log.w(TAG, "there is no update. maybe user updates note when syncing");
|
|
|
}
|
|
|
}
|
|
|
|
|
|
if (mType == Notes.TYPE_NOTE) {//对note类型，还是对其中的data引用commit，从而实现目的
|
|
|
for (SqlData sqlData : mDataList) {
|
|
|
sqlData.commit(mId, validateVersion, mVersion);
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
// refresh local info//更新本地信息
|
|
|
loadFromCursor(mId);
|
|
|
if (mType == Notes.TYPE_NOTE)//如果是便签类型：
|
|
|
loadDataContent();//获取共享数据并加载到数据库
|
|
|
|
|
|
mDiffNoteValues.clear();//清空，回到初始化状态
|
|
|
mIsCreate = false;
|
|
|
}//改变数据库构造模式
|
|
|
}
|
