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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;//包名声明:路径"net.micode.notes.gtask.data"，文件中定义的类和接口都归属于这个包
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import org.json.JSONException; //引入"org.json.JSONException"类，用于处理JSON格式数据的异常
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import org.json.JSONObject; //表示和操作JSON对象
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import android.database.Cursor;//导入Android平台的数据库Cursor类用于从数据库中检索数据记录并对结果进行管理和遍历。
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import android.util.Log;//引入工具类Log来存放一些通用的、与业务逻辑无关的工具方法
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import net.micode.notes.tool.GTaskStringUtils;//导入 GTaskStringUtils工具类
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public class MetaData extends Task {
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private final static String TAG = MetaData.class.getSimpleName(); // 用于在日志中标识当前类的名称
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private String mRelatedGid = null;
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public void setMeta(String gid, JSONObject metaInfo) {
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try {
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metaInfo.put(GTaskStringUtils.META_HEAD_GTASK_ID, gid);
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} catch (JSONException e) { // 如果出现 JSONException 异常，则会捕获并记录日志
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Log.e(TAG, "failed to put related gid");
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}
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// try-catch 块中，将键值对 (GTaskStringUtils.META_HEAD_GTASK_ID, gid) 添加到传入的 metaInfo
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// JSON 对象中。
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setNotes(metaInfo.toString());
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setName(GTaskStringUtils.META_NOTE_NAME);
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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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@Override
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// 是一个Java注解，用于告诉编译器该方法是重写父类或接口中的方法。
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public boolean isWorthSaving() {
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return getNotes() != null;
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}
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@Override
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public void setContentByRemoteJSON(JSONObject js) {
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super.setContentByRemoteJSON(js); // 调用父类的方法，传入参数js
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if (getNotes() != null) {
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String notes = getNotes().trim(); // 获取notes并去除首尾空格
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try {
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JSONObject metaInfo = new JSONObject(notes); // 转化为JSONObject对象
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mRelatedGid = metaInfo.optString(GTaskStringUtils.META_HEAD_GTASK_ID, null); // 提取特征字段
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} catch (JSONException e) {
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Log.w(TAG, "failed to get related gid", e);
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mRelatedGid = null;
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}
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}
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}
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// 以下三段表示不应该被调用，如果调用了，抛出了一个IllegalAccessError异常，并提供了错误消息
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@Override
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public void setContentByLocalJSON(JSONObject js) {
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// this function should not be called
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throw new IllegalAccessError("MetaData:setContentByLocalJSON should not be called");
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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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@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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