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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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// 定义一个名为MetaData的类，它继承自Task类
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public class MetaData extends Task {
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// 定义一个静态常量TAG，用于日志记录时标识这个类
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private final static String TAG = MetaData.class.getSimpleName();
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// 定义一个私有变量mRelatedGid，用于存储相关的gid（全局唯一标识符）
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private String mRelatedGid = null;
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// 定义一个方法，用于设置元数据
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// 参数gid是全局唯一标识符，metaInfo是包含元数据的JSONObject
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public void setMeta(String gid, JSONObject metaInfo) {
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try {
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// 将gid添加到metaInfo中，键为GTaskStringUtils.META_HEAD_GTASK_ID
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metaInfo.put(GTaskStringUtils.META_HEAD_GTASK_ID, gid);
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} catch (JSONException e) {
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// 如果添加失败，则记录错误日志
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Log.e(TAG, "failed to put related gid");
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}
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// 调用setNotes方法，将metaInfo的字符串表示形式设置为任务的备注
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setNotes(metaInfo.toString());
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// 设置任务的名称为预设的元数据名称
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setName(GTaskStringUtils.META_NOTE_NAME);
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}
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// 定义一个方法，用于获取相关的gid
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public String getRelatedGid() {
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return mRelatedGid;
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}
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// 重写isWorthSaving方法，判断这个MetaData对象是否值得保存
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// 如果备注（即元数据）不为null，则认为值得保存
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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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// 重写setContentByRemoteJSON方法，用于从远程JSON对象中设置内容
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// 首先调用父类的同名方法，然后从备注中提取JSON对象，并获取gid
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@Override
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public void setContentByRemoteJSON(JSONObject js) {
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super.setContentByRemoteJSON(js);
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if (getNotes() != null) {
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try {
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JSONObject metaInfo = new JSONObject(getNotes().trim());
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mRelatedGid = metaInfo.getString(GTaskStringUtils.META_HEAD_GTASK_ID);
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} catch (JSONException e) {
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// 如果获取gid失败，则记录警告日志，并将mRelatedGid设置为null
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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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// 重写setContentByLocalJSON方法，由于这个方法不应该被调用，所以抛出IllegalAccessError异常
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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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// 重写getLocalJSONFromContent方法，同样由于不应该被调用，抛出IllegalAccessError异常
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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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// 重写getSyncAction方法，由于不应该被调用，抛出IllegalAccessError异常
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// 这个方法通常用于同步操作，但在这个MetaData类中不适用
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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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