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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.database.Cursor;
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import android.util.Log;
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import net.micode.notes.tool.GTaskStringUtils;
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import org.json.JSONException;
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import org.json.JSONObject;
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/**
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* MetaData类用于处理Google Tasks同步过程中的元数据
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* 继承自Task类，专门用于存储与Google Tasks任务相关的元数据信息
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* 这些元数据以JSON格式存储在笔记内容中
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*/
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public class MetaData extends Task {
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private final static String TAG = MetaData.class.getSimpleName();
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// 关联的Google Tasks任务ID
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private String mRelatedGid = null;
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/**
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* 设置元数据信息
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* @param gid 关联的Google Tasks任务ID
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* @param metaInfo 元数据信息的JSONObject对象
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*/
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public void setMeta(String gid, JSONObject metaInfo) {
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try {
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// 将关联的Google Tasks任务ID添加到元数据中
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metaInfo.put(GTaskStringUtils.META_HEAD_GTASK_ID, gid);
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} catch (JSONException e) {
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Log.e(TAG, "failed to put related gid");
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}
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// 将元数据JSON转换为字符串并设置为笔记内容
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setNotes(metaInfo.toString());
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// 设置元数据笔记的名称
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setName(GTaskStringUtils.META_NOTE_NAME);
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}
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/**
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* 获取关联的Google Tasks任务ID
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* @return 关联的任务ID
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*/
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public String getRelatedGid() {
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return mRelatedGid;
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}
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/**
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* 判断当前元数据是否值得保存
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* @return 如果笔记内容不为空则返回true，否则返回false
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*/
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@Override
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public boolean isWorthSaving() {
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return getNotes() != null;
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}
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/**
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* 根据远程JSON数据设置元数据内容
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* @param js 远程获取的JSON对象
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*/
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@Override
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public void setContentByRemoteJSON(JSONObject js) {
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// 调用父类方法设置基本内容
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super.setContentByRemoteJSON(js);
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if (getNotes() != null) {
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try {
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// 解析笔记内容中的JSON数据
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JSONObject metaInfo = new JSONObject(getNotes().trim());
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// 从元数据中提取关联的Google Tasks任务ID
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mRelatedGid = metaInfo.getString(GTaskStringUtils.META_HEAD_GTASK_ID);
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} catch (JSONException e) {
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Log.w(TAG, "failed to get related gid");
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mRelatedGid = null;
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}
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}
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}
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/**
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* 此方法不应该被调用，因为元数据不支持从本地JSON设置内容
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* @param js 本地JSON对象
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*/
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@Override
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public void setContentByLocalJSON(JSONObject js) {
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throw new IllegalAccessError("MetaData:setContentByLocalJSON should not be called");
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}
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/**
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* 此方法不应该被调用，因为元数据不支持从内容获取本地JSON
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* @return 不返回任何内容，总是抛出异常
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*/
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@Override
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public JSONObject getLocalJSONFromContent() {
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throw new IllegalAccessError("MetaData:getLocalJSONFromContent should not be called");
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}
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/**
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* 此方法不应该被调用，因为元数据不支持获取同步操作
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* @param c 数据库游标
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* @return 不返回任何内容，总是抛出异常
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*/
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@Override
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public int getSyncAction(Cursor c) {
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throw new IllegalAccessError("MetaData:getSyncAction should not be called");
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}
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}
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