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```java
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// Task类继承自Node类，用于表示一个任务对象
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public class Task extends Node {
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// 日志标签，用于标识日志信息来源
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private static final String TAG = Task.class.getSimpleName();
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// 表示任务是否已完成
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private boolean mCompleted;
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// 任务的备注信息
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private String mNotes;
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// 任务的元信息，使用JSONObject存储
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private JSONObject mMetaInfo;
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// 任务的前一个兄弟任务，用于任务排序
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private Task mPriorSibling;
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// 任务所属的任务列表
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private TaskList mParent;
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// Task类的构造方法，初始化任务的默认状态
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public Task() {
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super();
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mCompleted = false;
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mNotes = null;
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mPriorSibling = null;
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mParent = null;
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mMetaInfo = null;
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}
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/**
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* 生成任务创建操作的JSON对象
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* @param actionId 操作ID
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* @return 返回表示创建操作的JSONObject
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* @throws ActionFailureException 如果JSON对象生成失败，则抛出此异常
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*/
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public JSONObject getCreateAction(int actionId) {
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JSONObject js = new JSONObject();
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try {
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// action_type
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js.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
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GTaskStringUtils.GTASK_JSON_ACTION_TYPE_CREATE);
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// action_id
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js.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, actionId);
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// index
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js.put(GTaskStringUtils.GTASK_JSON_INDEX, mParent.getChildTaskIndex(this));
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// entity_delta
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JSONObject entity = new JSONObject();
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entity.put(GTaskStringUtils.GTASK_JSON_NAME, getName());
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entity.put(GTaskStringUtils.GTASK_JSON_CREATOR_ID, "null");
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entity.put(GTaskStringUtils.GTASK_JSON_ENTITY_TYPE,
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GTaskStringUtils.GTASK_JSON_TYPE_TASK);
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if (getNotes() != null) {
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entity.put(GTaskStringUtils.GTASK_JSON_NOTES, getNotes());
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}
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js.put(GTaskStringUtils.GTASK_JSON_ENTITY_DELTA, entity);
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// parent_id
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js.put(GTaskStringUtils.GTASK_JSON_PARENT_ID, mParent.getGid());
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// dest_parent_type
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js.put(GTaskStringUtils.GTASK_JSON_DEST_PARENT_TYPE,
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GTaskStringUtils.GTASK_JSON_TYPE_GROUP);
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// list_id
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js.put(GTaskStringUtils.GTASK_JSON_LIST_ID, mParent.getGid());
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// prior_sibling_id
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if (mPriorSibling != null) {
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js.put(GTaskStringUtils.GTASK_JSON_PRIOR_SIBLING_ID, mPriorSibling.getGid());
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}
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} catch (JSONException e) {
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Log.e(TAG, e.toString());
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e.printStackTrace();
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throw new ActionFailureException("fail to generate task-create jsonobject");
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}
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return js;
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}
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/**
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* 生成任务更新操作的JSON对象
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* @param actionId 操作ID
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* @return 返回表示更新操作的JSONObject
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* @throws ActionFailureException 如果JSON对象生成失败，则抛出此异常
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*/
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public JSONObject getUpdateAction(int actionId) {
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JSONObject js = new JSONObject();
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try {
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// action_type
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js.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
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GTaskStringUtils.GTASK_JSON_ACTION_TYPE_UPDATE);
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// action_id
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js.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, actionId);
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// id
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js.put(GTaskStringUtils.GTASK_JSON_ID, getGid());
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// entity_delta
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JSONObject entity = new JSONObject();
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entity.put(GTaskStringUtils.GTASK_JSON_NAME, getName());
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if (getNotes() != null) {
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entity.put(GTaskStringUtils.GTASK_JSON_NOTES, getNotes());
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}
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entity.put(GTaskStringUtils.GTASK_JSON_DELETED, getDeleted());
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js.put(GTaskStringUtils.GTASK_JSON_ENTITY_DELTA, entity);
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} catch (JSONException e) {
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Log.e(TAG, e.toString());
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e.printStackTrace();
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throw new ActionFailureException("fail to generate task-update jsonobject");
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}
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return js;
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}
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/**
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* 通过远程JSON对象设置任务内容
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* @param js 远程JSON对象，包含任务的相关信息
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* @throws ActionFailureException 如果设置内容失败，则抛出此异常
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*/
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public void setContentByRemoteJSON(JSONObject js) {
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if (js != null) {
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try {
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// id
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if (js.has(GTaskStringUtils.GTASK_JSON_ID)) {
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setGid(js.getString(GTaskStringUtils.GTASK_JSON_ID));
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}
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// last_modified
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if (js.has(GTaskStringUtils.GTASK_JSON_LAST_MODIFIED)) {
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setLastModified(js.getLong(GTaskStringUtils.GTASK_JSON_LAST_MODIFIED));
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}
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// name
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if (js.has(GTaskStringUtils.GTASK_JSON_NAME)) {
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setName(js.getString(GTaskStringUtils.GTASK_JSON_NAME));
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}
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// notes
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if (js.has(GTaskStringUtils.GTASK_JSON_NOTES)) {
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setNotes(js.getString(GTaskStringUtils.GTASK_JSON_NOTES));
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}
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// deleted
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if (js.has(GTaskStringUtils.GTASK_JSON_DELETED)) {
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setDeleted(js.getBoolean(GTaskStringUtils.GTASK_JSON_DELETED));
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}
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// completed
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if (js.has(GTaskStringUtils.GTASK_JSON_COMPLETED)) {
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setCompleted(js.getBoolean(GTaskStringUtils.GTASK_JSON_COMPLETED));
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}
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} catch (JSONException e) {
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Log.e(TAG, e.toString());
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e.printStackTrace();
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throw new ActionFailureException("fail to get task content from jsonobject");
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}
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}
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}
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/**
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* 通过本地JSON对象设置任务内容
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* @param js 本地JSON对象，包含任务的相关信息
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* @throws ActionFailureException 如果设置内容失败，则抛出此异常
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*/
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public void setContentByLocalJSON(JSONObject js) {
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if (js == null || !js.has(GTaskStringUtils.META_HEAD_NOTE)
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|| !js.has(GTaskStringUtils.META_HEAD_DATA)) {
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```
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// 当没有可用内容时记录警告信息
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Log.w(TAG, "setContentByLocalJSON: nothing is avaiable");
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}
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try {
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// 从JSON对象中获取笔记和数据数组
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JSONObject note = js.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
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JSONArray dataArray = js.getJSONArray(GTaskStringUtils.META_HEAD_DATA);
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// 检查笔记类型是否无效
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if (note.getInt(NoteColumns.TYPE) != Notes.TYPE_NOTE) {
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Log.e(TAG, "invalid type");
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return;
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}
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// 遍历数据数组以查找并设置笔记内容
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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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if (TextUtils.equals(data.getString(DataColumns.MIME_TYPE), DataConstants.NOTE)) {
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setName(data.getString(DataColumns.CONTENT));
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break;
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}
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}
|
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|
|
|
} catch (JSONException e) {
|
|
|
// 记录并打印JSONException的堆栈跟踪
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|
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Log.e(TAG, e.toString());
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e.printStackTrace();
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|
|
}
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```
|
|
|
```java
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|
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/**
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|
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* 从内容生成本地使用的JSON对象
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|
|
*
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|
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* @return 表示笔记内容的JSONObject，如果内容为空则返回null
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|
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*/
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|
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public JSONObject getLocalJSONFromContent() {
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|
|
String name = getName();
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|
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try {
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|
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// 处理从网页创建的新任务
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|
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if (mMetaInfo == null) {
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|
if (name == null) {
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Log.w(TAG, "the note seems to be an empty one");
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return null;
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}
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|
|
// 构建新的笔记JSON对象
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|
|
JSONObject js = new JSONObject();
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|
|
JSONObject note = new JSONObject();
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|
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JSONArray dataArray = new JSONArray();
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|
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JSONObject data = new JSONObject();
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|
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data.put(DataColumns.CONTENT, name);
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dataArray.put(data);
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|
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js.put(GTaskStringUtils.META_HEAD_DATA, dataArray);
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note.put(NoteColumns.TYPE, Notes.TYPE_NOTE);
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js.put(GTaskStringUtils.META_HEAD_NOTE, note);
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|
|
return js;
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|
|
} else {
|
|
|
// 处理已同步的任务
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|
|
JSONObject note = mMetaInfo.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
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|
|
JSONArray dataArray = mMetaInfo.getJSONArray(GTaskStringUtils.META_HEAD_DATA);
|
|
|
|
|
|
// 更新数据数组中的笔记内容
|
|
|
for (int i = 0; i < dataArray.length(); i++) {
|
|
|
JSONObject data = dataArray.getJSONObject(i);
|
|
|
if (TextUtils.equals(data.getString(DataColumns.MIME_TYPE), DataConstants.NOTE)) {
|
|
|
data.put(DataColumns.CONTENT, getName());
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
note.put(NoteColumns.TYPE, Notes.TYPE_NOTE);
|
|
|
return mMetaInfo;
|
|
|
}
|
|
|
} catch (JSONException e) {
|
|
|
// 记录并打印JSONException的堆栈跟踪
|
|
|
Log.e(TAG, e.toString());
|
|
|
e.printStackTrace();
|
|
|
return null;
|
|
|
}
|
|
|
}
|
|
|
```
|
|
|
```java
|
|
|
/**
|
|
|
* 设置任务的元信息
|
|
|
*
|
|
|
* @param metaData 包含笔记信息的MetaData对象
|
|
|
*/
|
|
|
public void setMetaInfo(MetaData metaData) {
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|
|
if (metaData != null && metaData.getNotes() != null) {
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|
|
try {
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|
|
// 将笔记信息转换为JSON对象
|
|
|
mMetaInfo = new JSONObject(metaData.getNotes());
|
|
|
} catch (JSONException e) {
|
|
|
// 转换失败时记录错误并将mMetaInfo设置为null
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|
|
Log.w(TAG, e.toString());
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|
|
mMetaInfo = null;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
```
|
|
|
```java
|
|
|
/**
|
|
|
* 根据当前状态和数据库游标确定同步操作
|
|
|
*
|
|
|
* @param c 指向数据库中笔记数据的游标
|
|
|
* @return 表示要执行的同步操作的整数
|
|
|
*/
|
|
|
public int getSyncAction(Cursor c) {
|
|
|
try {
|
|
|
// 从mMetaInfo中获取笔记信息
|
|
|
JSONObject noteInfo = null;
|
|
|
if (mMetaInfo != null && mMetaInfo.has(GTaskStringUtils.META_HEAD_NOTE)) {
|
|
|
noteInfo = mMetaInfo.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
|
|
|
}
|
|
|
|
|
|
// 根据笔记信息确定同步操作
|
|
|
if (noteInfo == null) {
|
|
|
Log.w(TAG, "it seems that note meta has been deleted");
|
|
|
return SYNC_ACTION_UPDATE_REMOTE;
|
|
|
}
|
|
|
|
|
|
if (!noteInfo.has(NoteColumns.ID)) {
|
|
|
Log.w(TAG, "remote note id seems to be deleted");
|
|
|
return SYNC_ACTION_UPDATE_LOCAL;
|
|
|
}
|
|
|
|
|
|
// 验证笔记ID
|
|
|
if (c.getLong(SqlNote.ID_COLUMN) != noteInfo.getLong(NoteColumns.ID)) {
|
|
|
Log.w(TAG, "note id doesn't match");
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|
|
return SYNC_ACTION_UPDATE_LOCAL;
|
|
|
}
|
|
|
|
|
|
// 根据本地修改状态确定同步操作
|
|
|
if (c.getInt(SqlNote.LOCAL_MODIFIED_COLUMN) == 0) {
|
|
|
if (c.getLong(SqlNote.SYNC_ID_COLUMN) == getLastModified()) {
|
|
|
return SYNC_ACTION_NONE;
|
|
|
} else {
|
|
|
return SYNC_ACTION_UPDATE_LOCAL;
|
|
|
}
|
|
|
} else {
|
|
|
// 验证GTasks ID
|
|
|
if (!c.getString(SqlNote.GTASK_ID_COLUMN).equals(getGid())) {
|
|
|
Log.e(TAG, "gtask id doesn't match");
|
|
|
return SYNC_ACTION_ERROR;
|
|
|
}
|
|
|
if (c.getLong(SqlNote.SYNC_ID_COLUMN) == getLastModified()) {
|
|
|
return SYNC_ACTION_UPDATE_REMOTE;
|
|
|
} else {
|
|
|
return SYNC_ACTION_UPDATE_CONFLICT;
|
|
|
}
|
|
|
}
|
|
|
} catch (Exception e) {
|
|
|
// 记录并打印异常的堆栈跟踪
|
|
|
Log.e(TAG, e.toString());
|
|
|
e.printStackTrace();
|
|
|
}
|
|
|
|
|
|
return SYNC_ACTION_ERROR;
|
|
|
}
|
|
|
```
|
|
|
```java
|
|
|
/**
|
|
|
* 检查任务是否有值得保存的内容
|
|
|
*
|
|
|
* @return 布尔值，表示任务是否有值得保存的内容
|
|
|
*/
|
|
|
public boolean isWorthSaving() {
|
|
|
return mMetaInfo != null || (getName() != null && getName().trim().length() > 0)
|
|
|
|| (getNotes() != null && getNotes().trim().length() > 0);
|
|
|
}
|
|
|
```
|
|
|
```java
|
|
|
// 设置任务的完成状态
|
|
|
public void setCompleted(boolean completed) {
|
|
|
this.mCompleted = completed;
|
|
|
}
|
|
|
|
|
|
// 设置任务的笔记内容
|
|
|
public void setNotes(String notes) {
|
|
|
this.mNotes = notes;
|
|
|
}
|
|
|
|
|
|
// 设置任务的前一个兄弟任务
|
|
|
public void setPriorSibling(Task priorSibling) {
|
|
|
this.mPriorSibling = priorSibling;
|
|
|
}
|
|
|
|
|
|
// 设置任务的父任务列表
|
|
|
public void setParent(TaskList parent) {
|
|
|
this.mParent = parent;
|
|
|
}
|
|
|
|
|
|
// 获取任务的完成状态
|
|
|
public boolean getCompleted() {
|
|
|
return this.mCompleted;
|
|
|
}
|
|
|
|
|
|
// 获取任务的笔记内容
|
|
|
public String getNotes() {
|
|
|
return this.mNotes;
|
|
|
}
|
|
|
|
|
|
// 获取任务的前一个兄弟任务
|
|
|
public Task getPriorSibling() {
|
|
|
return this.mPriorSibling;
|
|
|
}
|
|
|
|
|
|
// 获取任务的父任务列表
|
|
|
public TaskList getParent() {
|
|
|
return this.mParent;
|
|
|
}
|
|
|
```
|
