Java tutorial
/* * 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 cn.code.notes.gtask.data; import android.database.Cursor; import android.text.TextUtils; import android.util.Log; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import cn.code.notes.data.Notes; import cn.code.notes.data.NoteColumnsInterface.DataColumns; import cn.code.notes.data.Notes.DataConstants; import cn.code.notes.data.NoteColumnsInterface.NoteColumns; import cn.code.notes.gtask.exception.ActionFailureException; import cn.code.notes.tool.GTaskStringUtils; public class Task extends Node { private static final String TAG = Task.class.getSimpleName(); private boolean mCompleted; private String mNotes; private JSONObject mMetaInfo; private Task mPriorSibling; private TaskList mParent; public Task() { super(); mCompleted = false; mNotes = null; mPriorSibling = null; mParent = null; mMetaInfo = null; } public JSONObject getCreateAction(int actionId) { JSONObject js = new JSONObject(); try { // action_type js.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE, GTaskStringUtils.GTASK_JSON_ACTION_TYPE_CREATE); // action_id js.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, actionId); // index js.put(GTaskStringUtils.GTASK_JSON_INDEX, mParent.getChildTaskIndex(this)); // entity_delta JSONObject entity = new JSONObject(); entity.put(GTaskStringUtils.GTASK_JSON_NAME, getName()); entity.put(GTaskStringUtils.GTASK_JSON_CREATOR_ID, "null"); entity.put(GTaskStringUtils.GTASK_JSON_ENTITY_TYPE, GTaskStringUtils.GTASK_JSON_TYPE_TASK); if (getNotes() != null) { entity.put(GTaskStringUtils.GTASK_JSON_NOTES, getNotes()); } js.put(GTaskStringUtils.GTASK_JSON_ENTITY_DELTA, entity); // parent_id js.put(GTaskStringUtils.GTASK_JSON_PARENT_ID, mParent.getGid()); // dest_parent_type js.put(GTaskStringUtils.GTASK_JSON_DEST_PARENT_TYPE, GTaskStringUtils.GTASK_JSON_TYPE_GROUP); // list_id js.put(GTaskStringUtils.GTASK_JSON_LIST_ID, mParent.getGid()); // prior_sibling_id if (mPriorSibling != null) { js.put(GTaskStringUtils.GTASK_JSON_PRIOR_SIBLING_ID, mPriorSibling.getGid()); } } catch (JSONException e) { Log.e(TAG, e.toString()); e.printStackTrace(); throw new ActionFailureException("fail to generate task-create jsonobject"); } return js; } public JSONObject getUpdateAction(int actionId) { JSONObject js = new JSONObject(); try { // action_type js.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE, GTaskStringUtils.GTASK_JSON_ACTION_TYPE_UPDATE); // action_id js.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, actionId); // id js.put(GTaskStringUtils.GTASK_JSON_ID, getGid()); // entity_delta JSONObject entity = new JSONObject(); entity.put(GTaskStringUtils.GTASK_JSON_NAME, getName()); if (getNotes() != null) { entity.put(GTaskStringUtils.GTASK_JSON_NOTES, getNotes()); } entity.put(GTaskStringUtils.GTASK_JSON_DELETED, getDeleted()); js.put(GTaskStringUtils.GTASK_JSON_ENTITY_DELTA, entity); } catch (JSONException e) { Log.e(TAG, e.toString()); e.printStackTrace(); throw new ActionFailureException("fail to generate task-update jsonobject"); } return js; } public void setContentByRemoteJSON(JSONObject js) { if (js != null) { try { // id if (js.has(GTaskStringUtils.GTASK_JSON_ID)) { setGid(js.getString(GTaskStringUtils.GTASK_JSON_ID)); } // last_modified if (js.has(GTaskStringUtils.GTASK_JSON_LAST_MODIFIED)) { setLastModified(js.getLong(GTaskStringUtils.GTASK_JSON_LAST_MODIFIED)); } // name if (js.has(GTaskStringUtils.GTASK_JSON_NAME)) { setName(js.getString(GTaskStringUtils.GTASK_JSON_NAME)); } // notes if (js.has(GTaskStringUtils.GTASK_JSON_NOTES)) { setNotes(js.getString(GTaskStringUtils.GTASK_JSON_NOTES)); } // deleted if (js.has(GTaskStringUtils.GTASK_JSON_DELETED)) { setDeleted(js.getBoolean(GTaskStringUtils.GTASK_JSON_DELETED)); } // completed if (js.has(GTaskStringUtils.GTASK_JSON_COMPLETED)) { setCompleted(js.getBoolean(GTaskStringUtils.GTASK_JSON_COMPLETED)); } } catch (JSONException e) { Log.e(TAG, e.toString()); e.printStackTrace(); throw new ActionFailureException("fail to get task content from jsonobject"); } } } public void setContentByLocalJSON(JSONObject js) { if (js == null || !js.has(GTaskStringUtils.META_HEAD_NOTE) || !js.has(GTaskStringUtils.META_HEAD_DATA)) { Log.w(TAG, "setContentByLocalJSON: nothing is avaiable"); } try { JSONObject note = js.getJSONObject(GTaskStringUtils.META_HEAD_NOTE); JSONArray dataArray = js.getJSONArray(GTaskStringUtils.META_HEAD_DATA); if (note.getInt(NoteColumns.TYPE) != Notes.TYPE_NOTE) { Log.e(TAG, "invalid type"); return; } for (int i = 0; i < dataArray.length(); i++) { JSONObject data = dataArray.getJSONObject(i); if (TextUtils.equals(data.getString(DataColumns.MIME_TYPE), DataConstants.NOTE)) { setName(data.getString(DataColumns.CONTENT)); break; } } } catch (JSONException e) { Log.e(TAG, e.toString()); e.printStackTrace(); } } public JSONObject getLocalJSONFromContent() { String name = getName(); try { if (mMetaInfo == null) { // new task created from web if (name == null) { Log.w(TAG, "the note seems to be an empty one"); return null; } JSONObject js = new JSONObject(); JSONObject note = new JSONObject(); JSONArray dataArray = new JSONArray(); JSONObject data = new JSONObject(); data.put(DataColumns.CONTENT, name); dataArray.put(data); js.put(GTaskStringUtils.META_HEAD_DATA, dataArray); note.put(NoteColumns.TYPE, Notes.TYPE_NOTE); js.put(GTaskStringUtils.META_HEAD_NOTE, note); return js; } else { // synced task JSONObject note = mMetaInfo.getJSONObject(GTaskStringUtils.META_HEAD_NOTE); JSONArray dataArray = mMetaInfo.getJSONArray(GTaskStringUtils.META_HEAD_DATA); 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) { Log.e(TAG, e.toString()); e.printStackTrace(); return null; } } public void setMetaInfo(MetaData metaData) { if (metaData != null && metaData.getNotes() != null) { try { mMetaInfo = new JSONObject(metaData.getNotes()); } catch (JSONException e) { Log.w(TAG, e.toString()); mMetaInfo = null; } } } public int getSyncAction(Cursor c) { try { JSONObject noteInfo = null; if (mMetaInfo != null && mMetaInfo.has(GTaskStringUtils.META_HEAD_NOTE)) { noteInfo = mMetaInfo.getJSONObject(GTaskStringUtils.META_HEAD_NOTE); } 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; } // validate the note id now if (c.getLong(SqlNote.ID_COLUMN) != noteInfo.getLong(NoteColumns.ID)) { Log.w(TAG, "note id doesn't match"); return SYNC_ACTION_UPDATE_LOCAL; } if (c.getInt(SqlNote.LOCAL_MODIFIED_COLUMN) == 0) { // there is no local update if (c.getLong(SqlNote.SYNC_ID_COLUMN) == getLastModified()) { // no update both side return SYNC_ACTION_NONE; } else { // apply remote to local return SYNC_ACTION_UPDATE_LOCAL; } } else { // validate gtask 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()) { // local modification only return SYNC_ACTION_UPDATE_REMOTE; } else { return SYNC_ACTION_UPDATE_CONFLICT; } } } catch (Exception e) { Log.e(TAG, e.toString()); e.printStackTrace(); } return SYNC_ACTION_ERROR; } public boolean isWorthSaving() { return mMetaInfo != null || (getName() != null && getName().trim().length() > 0) || (getNotes() != null && getNotes().trim().length() > 0); } public void setCompleted(boolean completed) { this.mCompleted = completed; } public void setNotes(String notes) { this.mNotes = notes; } public void setPriorSibling(Task priorSibling) { this.mPriorSibling = priorSibling; } public void setParent(TaskList parent) { this.mParent = parent; } public boolean getCompleted() { return this.mCompleted; } public String getNotes() { return this.mNotes; } public Task getPriorSibling() { return this.mPriorSibling; } public TaskList getParent() { return this.mParent; } }