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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.content.ContentResolver;
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import android.content.ContentUris;
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import android.content.ContentValues;
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import android.content.Context;
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import android.database.Cursor;
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import android.net.Uri;
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import android.util.Log;
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import net.micode.notes.data.Notes;
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import net.micode.notes.data.Notes.DataColumns;
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import net.micode.notes.data.Notes.DataConstants;
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import net.micode.notes.data.Notes.NoteColumns;
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import net.micode.notes.data.NotesDatabaseHelper.TABLE;
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import net.micode.notes.gtask.exception.ActionFailureException;
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import org.json.JSONException;
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import org.json.JSONObject;
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// SqlData类用于管理数据库中的笔记数据
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public class SqlData {
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// 类的标签，用于日志记录
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private static final String TAG = SqlData.class.getSimpleName();
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// 无效的ID常量
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private static final int INVALID_ID = -99999;
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// 数据库查询的列
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public static final String[] PROJECTION_DATA = new String[] {
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DataColumns.ID, DataColumns.MIME_TYPE, DataColumns.CONTENT, DataColumns.DATA1,
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DataColumns.DATA3
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};
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// 数据库列的索引
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public static final int DATA_ID_COLUMN = 0;
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public static final int DATA_MIME_TYPE_COLUMN = 1;
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public static final int DATA_CONTENT_COLUMN = 2;
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public static final int DATA_CONTENT_DATA_1_COLUMN = 3;
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public static final int DATA_CONTENT_DATA_3_COLUMN = 4;
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// 成员变量
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private ContentResolver mContentResolver; // 内容解析器
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private boolean mIsCreate; // 是否为创建状态
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private long mDataId; // 数据ID
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private String mDataMimeType; // 数据MIME类型
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private String mDataContent; // 数据内容
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private long mDataContentData1; // 数据内容DATA1
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private String mDataContentData3; // 数据内容DATA3
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private ContentValues mDiffDataValues; // 差异数据值
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// 构造函数，初始化SqlData对象
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public SqlData(Context context) {
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mContentResolver = context.getContentResolver();
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mIsCreate = true;
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mDataId = INVALID_ID;
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mDataMimeType = DataConstants.NOTE;
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mDataContent = "";
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mDataContentData1 = 0;
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mDataContentData3 = "";
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mDiffDataValues = new ContentValues();
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}
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// 从Cursor构造SqlData对象
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public SqlData(Context context, Cursor c) {
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mContentResolver = context.getContentResolver();
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mIsCreate = false;
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loadFromCursor(c);
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mDiffDataValues = new ContentValues();
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}
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// 从Cursor加载数据
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private void loadFromCursor(Cursor c) {
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mDataId = c.getLong(DATA_ID_COLUMN);
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mDataMimeType = c.getString(DATA_MIME_TYPE_COLUMN);
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mDataContent = c.getString(DATA_CONTENT_COLUMN);
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mDataContentData1 = c.getLong(DATA_CONTENT_DATA_1_COLUMN);
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mDataContentData3 = c.getString(DATA_CONTENT_DATA_3_COLUMN);
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}
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// 设置内容
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public void setContent(JSONObject js) throws JSONException {
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// 根据JSON对象设置数据
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// ...
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}
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// 获取内容
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public JSONObject getContent() throws JSONException {
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// 根据当前数据创建JSON对象
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// ...
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}
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// 提交数据到数据库
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public void commit(long noteId, boolean validateVersion, long version) {
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// 根据创建状态和差异数据值，将数据插入或更新到数据库
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// ...
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}
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// 获取数据ID
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public long getId() {
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return mDataId;
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}
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} |
