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gtask/data/SqlNote.java注释

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何思源 3 months ago
parent 3fe36107b5
commit 0b6227c14c
1 changed files with 150 additions and 167 deletions
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app/src/main/java/net/micode/notes/gtask/data/SqlNote.java
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@ -38,11 +38,14 @@ import org.json.JSONObject;
import java.util.ArrayList;
// 数据库笔记操作类，处理笔记数据的SQL操作
public class SqlNote {
// 日志标签，使用类名
private static final String TAG = SqlNote.class.getSimpleName();
// 无效ID常量
private static final int INVALID_ID = -99999;
// 笔记查询投影数组，定义查询返回的列
public static final String[] PROJECTION_NOTE = new String[] {
NoteColumns.ID, NoteColumns.ALERTED_DATE, NoteColumns.BG_COLOR_ID,
NoteColumns.CREATED_DATE, NoteColumns.HAS_ATTACHMENT, NoteColumns.MODIFIED_DATE,
@ -52,167 +55,140 @@ public class SqlNote {
NoteColumns.VERSION
};
public static final int ID_COLUMN = 0;
public static final int ALERTED_DATE_COLUMN = 1;
public static final int BG_COLOR_ID_COLUMN = 2;
public static final int CREATED_DATE_COLUMN = 3;
public static final int HAS_ATTACHMENT_COLUMN = 4;
public static final int MODIFIED_DATE_COLUMN = 5;
public static final int NOTES_COUNT_COLUMN = 6;
public static final int PARENT_ID_COLUMN = 7;
public static final int SNIPPET_COLUMN = 8;
public static final int TYPE_COLUMN = 9;
public static final int WIDGET_ID_COLUMN = 10;
public static final int WIDGET_TYPE_COLUMN = 11;
public static final int SYNC_ID_COLUMN = 12;
public static final int LOCAL_MODIFIED_COLUMN = 13;
public static final int ORIGIN_PARENT_ID_COLUMN = 14;
public static final int GTASK_ID_COLUMN = 15;
public static final int VERSION_COLUMN = 16;
private Context mContext;
private ContentResolver mContentResolver;
private boolean mIsCreate;
private long mId;
private long mAlertDate;
private int mBgColorId;
private long mCreatedDate;
private int mHasAttachment;
private long mModifiedDate;
private long mParentId;
private String mSnippet;
private int mType;
private int mWidgetId;
private int mWidgetType;
private long mOriginParent;
private long mVersion;
private ContentValues mDiffNoteValues;
private ArrayList<SqlData> mDataList;
// 投影数组中各列的索引
public static final int ID_COLUMN = 0; // ID列索引
public static final int ALERTED_DATE_COLUMN = 1; // 提醒日期列索引
public static final int BG_COLOR_ID_COLUMN = 2; // 背景颜色ID列索引
public static final int CREATED_DATE_COLUMN = 3; // 创建日期列索引
public static final int HAS_ATTACHMENT_COLUMN = 4; // 附件标记列索引
public static final int MODIFIED_DATE_COLUMN = 5; // 修改日期列索引
public static final int NOTES_COUNT_COLUMN = 6; // 笔记数量列索引
public static final int PARENT_ID_COLUMN = 7; // 父ID列索引
public static final int SNIPPET_COLUMN = 8; // 内容列索引
public static final int TYPE_COLUMN = 9; // 类型列索引
public static final int WIDGET_ID_COLUMN = 10; // 小部件ID列索引
public static final int WIDGET_TYPE_COLUMN = 11; // 小部件类型列索引
public static final int SYNC_ID_COLUMN = 12; // 同步ID列索引
public static final int LOCAL_MODIFIED_COLUMN = 13; // 本地修改标记列索引
public static final int ORIGIN_PARENT_ID_COLUMN = 14; // 原始父ID列索引
public static final int GTASK_ID_COLUMN = 15; // GTask ID列索引
public static final int VERSION_COLUMN = 16; // 版本号列索引
// 成员变量
private Context mContext; // 上下文对象
private ContentResolver mContentResolver; // 内容解析器，用于操作ContentProvider
private boolean mIsCreate; // 标记是否为新建笔记
private long mId; // 笔记ID
private long mAlertDate; // 提醒日期
private int mBgColorId; // 背景颜色ID
private long mCreatedDate; // 创建日期
private int mHasAttachment; // 附件标记
private long mModifiedDate; // 修改日期
private long mParentId; // 父文件夹ID
private String mSnippet; // 笔记内容或文件夹名称
private int mType; // 类型（笔记/文件夹/系统）
private int mWidgetId; // 小部件ID
private int mWidgetType; // 小部件类型
private long mOriginParent; // 原始父ID
private long mVersion; // 版本号
private ContentValues mDiffNoteValues; // 变更的笔记值
private ArrayList<SqlData> mDataList; // 关联的数据列表
// 构造方法，初始化笔记对象
public SqlNote(Context context) {
mContext = context;
mContentResolver = context.getContentResolver();
mIsCreate = true;
mId = INVALID_ID;
mAlertDate = 0;
mBgColorId = ResourceParser.getDefaultBgId(context);
mCreatedDate = System.currentTimeMillis();
mHasAttachment = 0;
mModifiedDate = System.currentTimeMillis();
mParentId = 0;
mSnippet = "";
mType = Notes.TYPE_NOTE;
mWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID;
mWidgetType = Notes.TYPE_WIDGET_INVALIDE;
mOriginParent = 0;
mVersion = 0;
mDiffNoteValues = new ContentValues();
mDataList = new ArrayList<SqlData>();
mContext = context; // 保存上下文
mContentResolver = context.getContentResolver(); // 获取内容解析器
mIsCreate = true; // 标记为新建状态
mId = INVALID_ID; // 设置无效ID
mAlertDate = 0; // 初始化提醒日期为0
mBgColorId = ResourceParser.getDefaultBgId(context); // 设置默认背景颜色
mCreatedDate = System.currentTimeMillis(); // 初始化创建日期为当前时间
mHasAttachment = 0; // 初始化附件标记为0
mModifiedDate = System.currentTimeMillis(); // 初始化修改日期为当前时间
mParentId = 0; // 初始化父ID为0
mSnippet = ""; // 初始化内容为空
mType = Notes.TYPE_NOTE; // 默认为笔记类型
mWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID; // 无效小部件ID
mWidgetType = Notes.TYPE_WIDGET_INVALIDE; // 无效小部件类型
mOriginParent = 0; // 初始化原始父ID为0
mVersion = 0; // 初始化版本号为0
mDiffNoteValues = new ContentValues(); // 初始化变更值集合
mDataList = new ArrayList<SqlData>(); // 初始化数据列表
}
// 从Cursor构造笔记对象，用于从数据库查询结果创建对象
public SqlNote(Context context, Cursor c) {
mContext = context;
mContentResolver = context.getContentResolver();
mIsCreate = false;
loadFromCursor(c);
mDataList = new ArrayList<SqlData>();
if (mType == Notes.TYPE_NOTE)
loadDataContent();
mDiffNoteValues = new ContentValues();
mContext = context; // 保存上下文
mContentResolver = context.getContentResolver(); // 获取内容解析器
mIsCreate = false; // 标记为非新建状态
loadFromCursor(c); // 从Cursor加载数据
mDataList = new ArrayList<SqlData>(); // 初始化数据列表
if (mType == Notes.TYPE_NOTE) // 如果是笔记类型
loadDataContent(); // 加载关联数据
mDiffNoteValues = new ContentValues(); // 初始化变更值集合
}
// 根据ID构造笔记对象，从数据库加载数据
public SqlNote(Context context, long id) {
mContext = context;
mContentResolver = context.getContentResolver();
mIsCreate = false;
loadFromCursor(id);
mDataList = new ArrayList<SqlData>();
if (mType == Notes.TYPE_NOTE)
loadDataContent();
mDiffNoteValues = new ContentValues();
mContext = context; // 保存上下文
mContentResolver = context.getContentResolver(); // 获取内容解析器
mIsCreate = false; // 标记为非新建状态
loadFromCursor(id); // 从ID加载数据
mDataList = new ArrayList<SqlData>(); // 初始化数据列表
if (mType == Notes.TYPE_NOTE) // 如果是笔记类型
loadDataContent(); // 加载关联数据
mDiffNoteValues = new ContentValues(); // 初始化变更值集合
}
// 根据ID从数据库加载笔记数据
private void loadFromCursor(long id) {
Cursor c = null;
try {
// 查询笔记数据
c = mContentResolver.query(Notes.CONTENT_NOTE_URI, PROJECTION_NOTE, "(_id=?)",
new String[] {
String.valueOf(id)
}, null);
new String[] {String.valueOf(id)}, null);
if (c != null) {
c.moveToNext();
loadFromCursor(c);
loadFromCursor(c); // 从Cursor加载数据
} else {
Log.w(TAG, "loadFromCursor: cursor = null");
}
} finally {
if (c != null)
c.close();
c.close(); // 关闭Cursor
}
}
// 从Cursor加载笔记数据到对象
private void loadFromCursor(Cursor c) {
mId = c.getLong(ID_COLUMN);
mAlertDate = c.getLong(ALERTED_DATE_COLUMN);
mBgColorId = c.getInt(BG_COLOR_ID_COLUMN);
mCreatedDate = c.getLong(CREATED_DATE_COLUMN);
mHasAttachment = c.getInt(HAS_ATTACHMENT_COLUMN);
mModifiedDate = c.getLong(MODIFIED_DATE_COLUMN);
mParentId = c.getLong(PARENT_ID_COLUMN);
mSnippet = c.getString(SNIPPET_COLUMN);
mType = c.getInt(TYPE_COLUMN);
mWidgetId = c.getInt(WIDGET_ID_COLUMN);
mWidgetType = c.getInt(WIDGET_TYPE_COLUMN);
mVersion = c.getLong(VERSION_COLUMN);
mId = c.getLong(ID_COLUMN); // 获取ID
mAlertDate = c.getLong(ALERTED_DATE_COLUMN); // 获取提醒日期
mBgColorId = c.getInt(BG_COLOR_ID_COLUMN); // 获取背景颜色ID
mCreatedDate = c.getLong(CREATED_DATE_COLUMN); // 获取创建日期
mHasAttachment = c.getInt(HAS_ATTACHMENT_COLUMN); // 获取附件标记
mModifiedDate = c.getLong(MODIFIED_DATE_COLUMN); // 获取修改日期
mParentId = c.getLong(PARENT_ID_COLUMN); // 获取父ID
mSnippet = c.getString(SNIPPET_COLUMN); // 获取内容
mType = c.getInt(TYPE_COLUMN); // 获取类型
mWidgetId = c.getInt(WIDGET_ID_COLUMN); // 获取小部件ID
mWidgetType = c.getInt(WIDGET_TYPE_COLUMN); // 获取小部件类型
mVersion = c.getLong(VERSION_COLUMN); // 获取版本号
}
// 加载笔记关联的数据内容
private void loadDataContent() {
Cursor c = null;
mDataList.clear();
mDataList.clear(); // 清空数据列表
try {
// 查询关联的数据
c = mContentResolver.query(Notes.CONTENT_DATA_URI, SqlData.PROJECTION_DATA,
"(note_id=?)", new String[] {
String.valueOf(mId)
}, null);
"(note_id=?)", new String[] {String.valueOf(mId)}, null);
if (c != null) {
if (c.getCount() == 0) {
Log.w(TAG, "it seems that the note has not data");
return;
}
// 遍历Cursor，创建SqlData对象并添加到列表
while (c.moveToNext()) {
SqlData data = new SqlData(mContext, c);
mDataList.add(data);
@ -222,26 +198,25 @@ public class SqlNote {
}
} finally {
if (c != null)
c.close();
c.close(); // 关闭Cursor
}
}
// 根据JSON对象设置笔记内容
public boolean setContent(JSONObject js) {
try {
JSONObject note = js.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
if (note.getInt(NoteColumns.TYPE) == Notes.TYPE_SYSTEM) {
Log.w(TAG, "cannot set system folder");
} else if (note.getInt(NoteColumns.TYPE) == Notes.TYPE_FOLDER) {
// for folder we can only update the snnipet and type
String snippet = note.has(NoteColumns.SNIPPET) ? note
.getString(NoteColumns.SNIPPET) : "";
// 文件夹只能更新名称和类型
String snippet = note.has(NoteColumns.SNIPPET) ? note.getString(NoteColumns.SNIPPET) : "";
if (mIsCreate || !mSnippet.equals(snippet)) {
mDiffNoteValues.put(NoteColumns.SNIPPET, snippet);
}
mSnippet = snippet;
int type = note.has(NoteColumns.TYPE) ? note.getInt(NoteColumns.TYPE)
: Notes.TYPE_NOTE;
int type = note.has(NoteColumns.TYPE) ? note.getInt(NoteColumns.TYPE) : Notes.TYPE_NOTE;
if (mIsCreate || mType != type) {
mDiffNoteValues.put(NoteColumns.TYPE, type);
}
@ -254,88 +229,80 @@ public class SqlNote {
}
mId = id;
long alertDate = note.has(NoteColumns.ALERTED_DATE) ? note
.getLong(NoteColumns.ALERTED_DATE) : 0;
// 依次设置笔记的各个属性
long alertDate = note.has(NoteColumns.ALERTED_DATE) ? note.getLong(NoteColumns.ALERTED_DATE) : 0;
if (mIsCreate || mAlertDate != alertDate) {
mDiffNoteValues.put(NoteColumns.ALERTED_DATE, alertDate);
}
mAlertDate = alertDate;
int bgColorId = note.has(NoteColumns.BG_COLOR_ID) ? note
.getInt(NoteColumns.BG_COLOR_ID) : ResourceParser.getDefaultBgId(mContext);
int bgColorId = note.has(NoteColumns.BG_COLOR_ID) ? note.getInt(NoteColumns.BG_COLOR_ID) : ResourceParser.getDefaultBgId(mContext);
if (mIsCreate || mBgColorId != bgColorId) {
mDiffNoteValues.put(NoteColumns.BG_COLOR_ID, bgColorId);
}
mBgColorId = bgColorId;
long createDate = note.has(NoteColumns.CREATED_DATE) ? note
.getLong(NoteColumns.CREATED_DATE) : System.currentTimeMillis();
long createDate = note.has(NoteColumns.CREATED_DATE) ? note.getLong(NoteColumns.CREATED_DATE) : System.currentTimeMillis();
if (mIsCreate || mCreatedDate != createDate) {
mDiffNoteValues.put(NoteColumns.CREATED_DATE, createDate);
}
mCreatedDate = createDate;
int hasAttachment = note.has(NoteColumns.HAS_ATTACHMENT) ? note
.getInt(NoteColumns.HAS_ATTACHMENT) : 0;
int hasAttachment = note.has(NoteColumns.HAS_ATTACHMENT) ? note.getInt(NoteColumns.HAS_ATTACHMENT) : 0;
if (mIsCreate || mHasAttachment != hasAttachment) {
mDiffNoteValues.put(NoteColumns.HAS_ATTACHMENT, hasAttachment);
}
mHasAttachment = hasAttachment;
long modifiedDate = note.has(NoteColumns.MODIFIED_DATE) ? note
.getLong(NoteColumns.MODIFIED_DATE) : System.currentTimeMillis();
long modifiedDate = note.has(NoteColumns.MODIFIED_DATE) ? note.getLong(NoteColumns.MODIFIED_DATE) : System.currentTimeMillis();
if (mIsCreate || mModifiedDate != modifiedDate) {
mDiffNoteValues.put(NoteColumns.MODIFIED_DATE, modifiedDate);
}
mModifiedDate = modifiedDate;
long parentId = note.has(NoteColumns.PARENT_ID) ? note
.getLong(NoteColumns.PARENT_ID) : 0;
long parentId = note.has(NoteColumns.PARENT_ID) ? note.getLong(NoteColumns.PARENT_ID) : 0;
if (mIsCreate || mParentId != parentId) {
mDiffNoteValues.put(NoteColumns.PARENT_ID, parentId);
}
mParentId = parentId;
String snippet = note.has(NoteColumns.SNIPPET) ? note
.getString(NoteColumns.SNIPPET) : "";
String snippet = note.has(NoteColumns.SNIPPET) ? note.getString(NoteColumns.SNIPPET) : "";
if (mIsCreate || !mSnippet.equals(snippet)) {
mDiffNoteValues.put(NoteColumns.SNIPPET, snippet);
}
mSnippet = snippet;
int type = note.has(NoteColumns.TYPE) ? note.getInt(NoteColumns.TYPE)
: Notes.TYPE_NOTE;
int type = note.has(NoteColumns.TYPE) ? note.getInt(NoteColumns.TYPE) : Notes.TYPE_NOTE;
if (mIsCreate || mType != type) {
mDiffNoteValues.put(NoteColumns.TYPE, type);
}
mType = type;
int widgetId = note.has(NoteColumns.WIDGET_ID) ? note.getInt(NoteColumns.WIDGET_ID)
: AppWidgetManager.INVALID_APPWIDGET_ID;
int widgetId = note.has(NoteColumns.WIDGET_ID) ? note.getInt(NoteColumns.WIDGET_ID) : AppWidgetManager.INVALID_APPWIDGET_ID;
if (mIsCreate || mWidgetId != widgetId) {
mDiffNoteValues.put(NoteColumns.WIDGET_ID, widgetId);
}
mWidgetId = widgetId;
int widgetType = note.has(NoteColumns.WIDGET_TYPE) ? note
.getInt(NoteColumns.WIDGET_TYPE) : Notes.TYPE_WIDGET_INVALIDE;
int widgetType = note.has(NoteColumns.WIDGET_TYPE) ? note.getInt(NoteColumns.WIDGET_TYPE) : Notes.TYPE_WIDGET_INVALIDE;
if (mIsCreate || mWidgetType != widgetType) {
mDiffNoteValues.put(NoteColumns.WIDGET_TYPE, widgetType);
}
mWidgetType = widgetType;
long originParent = note.has(NoteColumns.ORIGIN_PARENT_ID) ? note
.getLong(NoteColumns.ORIGIN_PARENT_ID) : 0;
long originParent = note.has(NoteColumns.ORIGIN_PARENT_ID) ? note.getLong(NoteColumns.ORIGIN_PARENT_ID) : 0;
if (mIsCreate || mOriginParent != originParent) {
mDiffNoteValues.put(NoteColumns.ORIGIN_PARENT_ID, originParent);
}
mOriginParent = originParent;
// 处理关联的数据
for (int i = 0; i < dataArray.length(); i++) {
JSONObject data = dataArray.getJSONObject(i);
SqlData sqlData = null;
if (data.has(DataColumns.ID)) {
long dataId = data.getLong(DataColumns.ID);
// 查找已存在的数据对象
for (SqlData temp : mDataList) {
if (dataId == temp.getId()) {
sqlData = temp;
@ -359,6 +326,7 @@ public class SqlNote {
return true;
}
// 获取笔记内容的JSON表示
public JSONObject getContent() {
try {
JSONObject js = new JSONObject();
@ -370,6 +338,7 @@ public class SqlNote {
JSONObject note = new JSONObject();
if (mType == Notes.TYPE_NOTE) {
// 填充笔记基本信息
note.put(NoteColumns.ID, mId);
note.put(NoteColumns.ALERTED_DATE, mAlertDate);
note.put(NoteColumns.BG_COLOR_ID, mBgColorId);
@ -384,6 +353,7 @@ public class SqlNote {
note.put(NoteColumns.ORIGIN_PARENT_ID, mOriginParent);
js.put(GTaskStringUtils.META_HEAD_NOTE, note);
// 填充关联的数据
JSONArray dataArray = new JSONArray();
for (SqlData sqlData : mDataList) {
JSONObject data = sqlData.getContent();
@ -393,6 +363,7 @@ public class SqlNote {
}
js.put(GTaskStringUtils.META_HEAD_DATA, dataArray);
} else if (mType == Notes.TYPE_FOLDER || mType == Notes.TYPE_SYSTEM) {
// 文件夹或系统类型只需要基本信息
note.put(NoteColumns.ID, mId);
note.put(NoteColumns.TYPE, mType);
note.put(NoteColumns.SNIPPET, mSnippet);
@ -407,45 +378,56 @@ public class SqlNote {
return null;
}
// 设置父文件夹ID
public void setParentId(long id) {
mParentId = id;
mDiffNoteValues.put(NoteColumns.PARENT_ID, id);
}
// 设置GTask ID
public void setGtaskId(String gid) {
mDiffNoteValues.put(NoteColumns.GTASK_ID, gid);
}
// 设置同步ID
public void setSyncId(long syncId) {
mDiffNoteValues.put(NoteColumns.SYNC_ID, syncId);
}
// 重置本地修改标记
public void resetLocalModified() {
mDiffNoteValues.put(NoteColumns.LOCAL_MODIFIED, 0);
}
// 获取笔记ID
public long getId() {
return mId;
}
// 获取父文件夹ID
public long getParentId() {
return mParentId;
}
// 获取笔记内容或文件夹名称
public String getSnippet() {
return mSnippet;
}
// 判断是否为笔记类型
public boolean isNoteType() {
return mType == Notes.TYPE_NOTE;
}
// 提交笔记数据到数据库
public void commit(boolean validateVersion) {
if (mIsCreate) {
// 处理新建笔记
if (mId == INVALID_ID && mDiffNoteValues.containsKey(NoteColumns.ID)) {
mDiffNoteValues.remove(NoteColumns.ID);
}
// 插入笔记到ContentProvider
Uri uri = mContentResolver.insert(Notes.CONTENT_NOTE_URI, mDiffNoteValues);
try {
mId = Long.valueOf(uri.getPathSegments().get(1));
@ -457,36 +439,37 @@ public class SqlNote {
throw new IllegalStateException("Create thread id failed");
}
// 如果是笔记类型，提交关联的数据
if (mType == Notes.TYPE_NOTE) {
for (SqlData sqlData : mDataList) {
sqlData.commit(mId, false, -1);
}
}
} else {
// 处理已存在的笔记更新
if (mId <= 0 && mId != Notes.ID_ROOT_FOLDER && mId != Notes.ID_CALL_RECORD_FOLDER) {
Log.e(TAG, "No such note");
throw new IllegalStateException("Try to update note with invalid id");
}
if (mDiffNoteValues.size() > 0) {
mVersion ++;
mVersion ++; // 版本号加1
int result = 0;
if (!validateVersion) {
// 不验证版本的更新
result = mContentResolver.update(Notes.CONTENT_NOTE_URI, mDiffNoteValues, "("
+ NoteColumns.ID + "=?)", new String[] {
String.valueOf(mId)
});
+ NoteColumns.ID + "=?)", new String[] {String.valueOf(mId)});
} else {
// 验证版本的更新，防止并发冲突
result = mContentResolver.update(Notes.CONTENT_NOTE_URI, mDiffNoteValues, "("
+ NoteColumns.ID + "=?) AND (" + NoteColumns.VERSION + "<=?)",
new String[] {
String.valueOf(mId), String.valueOf(mVersion)
});
+ NoteColumns.ID + "=?) AND (" + NoteColumns.VERSION + "<=?)",
new String[] {String.valueOf(mId), String.valueOf(mVersion)});
}
if (result == 0) {
Log.w(TAG, "there is no update. maybe user updates note when syncing");
}
}
// 如果是笔记类型，提交关联的数据
if (mType == Notes.TYPE_NOTE) {
for (SqlData sqlData : mDataList) {
sqlData.commit(mId, validateVersion, mVersion);
@ -494,12 +477,12 @@ public class SqlNote {
}
}
// refresh local info
// 刷新本地信息
loadFromCursor(mId);
if (mType == Notes.TYPE_NOTE)
loadDataContent();
mDiffNoteValues.clear();
mIsCreate = false;
mDiffNoteValues.clear(); // 清空变更值
mIsCreate = false; // 标记为非新建状态
}
}
}
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