/*
 * 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 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

import org.json.JSONException; //引入"org.json.JSONException"类，用于处理JSON格式数据的异常
import org.json.JSONObject; //表示和操作JSON对象

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。
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
import net.micode.notes.tool.GTaskStringUtils;//导入 GTaskStringUtils工具类

public class MetaData extends Task {
    private final static String TAG = MetaData.class.getSimpleName(); // 用于在日志中标识当前类的名称

    private String mRelatedGid = null;

    public void setMeta(String gid, JSONObject metaInfo) {
        try {
            metaInfo.put(GTaskStringUtils.META_HEAD_GTASK_ID, gid);
        } catch (JSONException e) { // 如果出现 JSONException 异常，则会捕获并记录日志
            Log.e(TAG, "failed to put related gid");
        }
        // try-catch 块中，将键值对 (GTaskStringUtils.META_HEAD_GTASK_ID, gid) 添加到传入的 metaInfo
        // JSON 对象中。

        setNotes(metaInfo.toString());
        setName(GTaskStringUtils.META_NOTE_NAME);
    }

    public String getRelatedGid() {
        return mRelatedGid;
    }

    @Override
    // 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。
    public boolean isWorthSaving() {
        return getNotes() != null;
    }

    @Override
    public void setContentByRemoteJSON(JSONObject js) {
        super.setContentByRemoteJSON(js); // 调用父类的方法，传入参数js
        if (getNotes() != null) {
            String notes = getNotes().trim(); // 获取notes并去除首尾空格
            try {
                JSONObject metaInfo = new JSONObject(notes); // 转化为JSONObject对象
                mRelatedGid = metaInfo.optString(GTaskStringUtils.META_HEAD_GTASK_ID, null); // 提取特征字段
            } catch (JSONException e) {
                Log.w(TAG, "failed to get related gid", e);
                mRelatedGid = null;
            }
        }
    }

    // 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

    @Override
    public void setContentByLocalJSON(JSONObject js) {
        // this function should not be called
        throw new IllegalAccessError("MetaData:setContentByLocalJSON should not be called");
    }

    @Override
    public JSONObject getLocalJSONFromContent() {
        throw new IllegalAccessError("MetaData:getLocalJSONFromContent should not be called");
    }

    @Override
    public int getSyncAction(Cursor c) {
        throw new IllegalAccessError("MetaData:getSyncAction should not be called");
    }

}