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3/23 part1

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bingdawan 8 months ago
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GTaskManager.java part1.txt
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package net.micode.notes.gtask.remote;
public class GTaskManager {
private static final String TAG = GTaskManager.class.getSimpleName();
public static final int STATE_SUCCESS = 0;
public static final int STATE_NETWORK_ERROR = 1;
public static final int STATE_INTERNAL_ERROR = 2;
public static final int STATE_SYNC_IN_PROGRESS = 3;
public static final int STATE_SYNC_CANCELLED = 4;
private static GTaskManager mInstance = null;
private Activity mActivity;
private Context mContext;
private ContentResolver mContentResolver;
private boolean mSyncing;
private boolean mCancelled;
private HashMap<String, TaskList> mGTaskListHashMap;
private HashMap<String, Node> mGTaskHashMap;
private HashMap<String, MetaData> mMetaHashMap;
private TaskList mMetaList;
private HashSet<Long> mLocalDeleteIdMap;
private HashMap<String, Long> mGidToNid;
private HashMap<Long, String> mNidToGid;
private GTaskManager() { //对象初始化函数
mSyncing = false; //正在同步,flase代表未执行
mCancelled = false; //全局标识，flase代表可以执行
mGTaskListHashMap = new HashMap<String, TaskList>(); //<>代表Java的泛型,就是创建一个用类型作为参数的类。
mGTaskHashMap = new HashMap<String, Node>();
mMetaHashMap = new HashMap<String, MetaData>();
mMetaList = null;
mLocalDeleteIdMap = new HashSet<Long>();
mGidToNid = new HashMap<String, Long>(); //GoogleID to NodeID??
mNidToGid = new HashMap<Long, String>(); //NodeID to GoogleID???通过hashmap散列表建立映射
}
/**
* 包含关键字synchronized，语言级同步，指明该函数可能运行在多线程的环境下。
* 功能：类初始化函数
* @author TTS
* @return GtaskManger
*/
public static synchronized GTaskManager getInstance() { //可能运行在多线程环境下，使用语言级同步--synchronized
if (mInstance == null) {
mInstance = new GTaskManager();
}
return mInstance;
}
/**
* 包含关键字synchronized，语言级同步，指明该函数可能运行在多线程的环境下。
* @author TTS
* @param activity
*/
public synchronized void setActivityContext(Activity activity) {
// used for getting auth token
mActivity = activity;
}
/**
* 核心函数
* 功能：实现了本地同步操作和远端同步操作
* @author TTS
* @param context-----获取上下文
* @param asyncTask-------用于同步的异步操作类
* @return int
*/
public int sync(Context context, GTaskASyncTask asyncTask) { //核心函数
if (mSyncing) {
Log.d(TAG, "Sync is in progress"); //创建日志文件（调试信息），debug
return STATE_SYNC_IN_PROGRESS;
}
mContext = context;
mContentResolver = mContext.getContentResolver();
mSyncing = true;
mCancelled = false;
mGTaskListHashMap.clear();
mGTaskHashMap.clear();
mMetaHashMap.clear();
mLocalDeleteIdMap.clear();
mGidToNid.clear();
mNidToGid.clear();
try {
GTaskClient client = GTaskClient.getInstance(); //getInstance即为创建一个实例,client--客户机
client.resetUpdateArray(); //JSONArray类型，reset即置为NULL
// login google task
if (!mCancelled) {
if (!client.login(mActivity)) {
throw new NetworkFailureException("login google task failed");
}
}
// get the task list from google
asyncTask.publishProgess(mContext.getString(R.string.sync_progress_init_list));
initGTaskList(); //获取Google上的JSONtasklist转为本地TaskList
// do content sync work
asyncTask.publishProgess(mContext.getString(R.string.sync_progress_syncing));
syncContent();
} catch (NetworkFailureException e) { //分为两种异常，此类异常为网络异常
Log.e(TAG, e.toString()); //创建日志文件（调试信息），error
return STATE_NETWORK_ERROR;
} catch (ActionFailureException e) { //此类异常为操作异常
Log.e(TAG, e.toString());
return STATE_INTERNAL_ERROR;
} catch (Exception e) {
Log.e(TAG, e.toString());
e.printStackTrace();
return STATE_INTERNAL_ERROR;
} finally {
mGTaskListHashMap.clear();
mGTaskHashMap.clear();
mMetaHashMap.clear();
mLocalDeleteIdMap.clear();
mGidToNid.clear();
mNidToGid.clear();
mSyncing = false;
}
return mCancelled ? STATE_SYNC_CANCELLED : STATE_SUCCESS;
}
/**
*功能：初始化GtaskList，获取Google上的JSONtasklist转为本地TaskList。
*获得的数据存储在mMetaList，mGTaskListHashMap，mGTaskHashMap
*@author TTS
*@exception NetworkFailureException
*@return void
*/
private void initGTaskList() throws NetworkFailureException {
if (mCancelled)
return;
GTaskClient client = GTaskClient.getInstance(); //getInstance即为创建一个实例，client应指远端客户机
try {
//Json对象是Name Value对(即子元素)的无序集合，相当于一个Map对象。JsonObject类是bantouyan-json库对Json对象的抽象，提供操纵Json对象的各种方法。
//其格式为{"key1":value1,"key2",value2....};key 必须是字符串。
//因为ajax请求不刷新页面，但配合js可以实现局部刷新，因此json常常被用来作为异步请求的返回对象使用。
JSONArray jsTaskLists = client.getTaskLists(); //原注释为get task list
// init meta list first初始化
mMetaList = null; //TaskList类型
for (int i = 0; i < jsTaskLists.length(); i++) {
JSONObject object = jsTaskLists.getJSONObject(i); //JSONObject与JSONArray一个为对象，一个为数组。此处取出单个JASONObject
String gid = object.getString(GTaskStringUtils.GTASK_JSON_ID);
String name = object.getString(GTaskStringUtils.GTASK_JSON_NAME);
if (name.equals(GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_META)) {
mMetaList = new TaskList(); //MetaList意为元表,Tasklist类型，此处为初始化
mMetaList.setContentByRemoteJSON(object); //将JSON中部分数据复制到自己定义的对象中相对应的数据：name->mname...
// load meta data
JSONArray jsMetas = client.getTaskList(gid); //原注释为get action_list
for (int j = 0; j < jsMetas.length(); j++) {
object = (JSONObject) jsMetas.getJSONObject(j);
MetaData metaData = new MetaData(); //继承自Node
metaData.setContentByRemoteJSON(object);
if (metaData.isWorthSaving()) { //if not worth to save，metadata将不加入mMetaList 判断是否存入
mMetaList.addChildTask(metaData);
if (metaData.getGid() != null) {
mMetaHashMap.put(metaData.getRelatedGid(), metaData);
}
}
}
}
}
// create meta list if not existed
if (mMetaList == null) {
mMetaList = new TaskList();
mMetaList.setName(GTaskStringUtils.MIUI_FOLDER_PREFFIX
+ GTaskStringUtils.FOLDER_META);
GTaskClient.getInstance().createTaskList(mMetaList);
}
// init task list初始化
for (int i = 0; i < jsTaskLists.length(); i++) {
JSONObject object = jsTaskLists.getJSONObject(i);
String gid = object.getString(GTaskStringUtils.GTASK_JSON_ID); //通过getString函数传入本地某个标志数据的名称，获取其在远端的名称。
String name = object.getString(GTaskStringUtils.GTASK_JSON_NAME);
if (name.startsWith(GTaskStringUtils.MIUI_FOLDER_PREFFIX)
&& !name.equals(GTaskStringUtils.MIUI_FOLDER_PREFFIX
+ GTaskStringUtils.FOLDER_META)) {
TaskList tasklist = new TaskList(); //继承自Node
tasklist.setContentByRemoteJSON(object);
mGTaskListHashMap.put(gid, tasklist);
mGTaskHashMap.put(gid, tasklist);
// load tasks加载
JSONArray jsTasks = client.getTaskList(gid);
for (int j = 0; j < jsTasks.length(); j++) {
object = (JSONObject) jsTasks.getJSONObject(j);
gid = object.getString(GTaskStringUtils.GTASK_JSON_ID);
Task task = new Task();
task.setContentByRemoteJSON(object);
if (task.isWorthSaving()) {
task.setMetaInfo(mMetaHashMap.get(gid));
tasklist.addChildTask(task);
mGTaskHashMap.put(gid, task);
}
}
}
}
} catch (JSONException e) {
Log.e(TAG, e.toString());
e.printStackTrace();
throw new ActionFailureException("initGTaskList: handing JSONObject failed");
}
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