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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 org.json.JSONObject;
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/**
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* 抽象节点类，定义同步任务的基础结构
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*
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* 功能说明：
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* - 作为所有同步任务节点的基类，提供基础属性和抽象方法
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* - 定义8种同步动作常量，用于标识数据同步方向
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* - 封装节点基础信息：全局ID、名称、最后修改时间和删除状态
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*
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* 设计目的：
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* - 为本地数据和远程数据同步提供统一接口
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* - 支持双向同步（本地↔远程）和冲突处理
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* - 通过抽象方法强制子类实现具体同步逻辑
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*/
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public abstract class Node {
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public static final int SYNC_ACTION_NONE = 0;// 无需同步
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public static final int SYNC_ACTION_ADD_REMOTE = 1; // 需要添加数据到远程
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public static final int SYNC_ACTION_ADD_LOCAL = 2;// 需要添加数据到本地
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public static final int SYNC_ACTION_DEL_REMOTE = 3;// 需要删除远程数据
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public static final int SYNC_ACTION_DEL_LOCAL = 4; // 需要删除本地数据
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public static final int SYNC_ACTION_UPDATE_REMOTE = 5;// 需要更新远程数据
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public static final int SYNC_ACTION_UPDATE_LOCAL = 6;// 需要更新本地数据
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public static final int SYNC_ACTION_UPDATE_CONFLICT = 7;// 需要解决更新冲突
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public static final int SYNC_ACTION_ERROR = 8;// 同步过程发生错误
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private String mGid;
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private String mName;
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private long mLastModified;
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private boolean mDeleted;
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public Node() {
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mGid = null;
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mName = "";
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mLastModified = 0;
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mDeleted = false;
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}
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/**
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* 生成创建动作的JSON数据
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* @param actionId 动作ID
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* @return 包含创建指令的JSON对象
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*/
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public abstract JSONObject getCreateAction(int actionId);
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/**
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* 生成更新动作的JSON数据
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* @param actionId 动作ID
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* @return 包含更新指令的JSON对象
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*/
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public abstract JSONObject getUpdateAction(int actionId);
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/**
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* 用远程JSON数据设置节点内容
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* @param js 来自远程的JSON数据
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*/
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public abstract void setContentByRemoteJSON(JSONObject js);
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/**
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* 用本地JSON数据设置节点内容
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* @param js 来自本地的JSON数据
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*/
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public abstract void setContentByLocalJSON(JSONObject js);
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/**
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* 从内容生成本地JSON数据
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* @return 包含节点内容的JSON对象
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*/
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public abstract JSONObject getLocalJSONFromContent();
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/**
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* 根据数据库游标获取同步动作类型
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* @param c 数据库游标
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* @return 同步动作常量值
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*/
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public abstract int getSyncAction(Cursor c);
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// 设置/获取全局唯一标识
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public void setGid(String gid) {
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this.mGid = gid;
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}
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// 设置/获取节点名称
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public void setName(String name) {
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this.mName = name;
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}
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// 设置/获取最后修改时间戳
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public void setLastModified(long lastModified) {
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this.mLastModified = lastModified;
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}
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// 设置/获取删除标记
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public void setDeleted(boolean deleted) {
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this.mDeleted = deleted;
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}
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public String getGid() {
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return this.mGid;
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}
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public String getName() {
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return this.mName;
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}
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public long getLastModified() {
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return this.mLastModified;
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}
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public boolean getDeleted() {
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return this.mDeleted;
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}
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}
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