/// <summary>
/// 创建一个 <see cref="Wunion.DataAdapter.Kernel.QuickDataChanger"/> 的对象实例。
/// </summary>
/// <param name="engine">执行数据库交互的引擎对象。</param>
public QuickDataChanger(DataEngine engine = null)
{
_Conditions = new List <object>();
Trans = null;
if (engine == null)
{
_Engine = DataEngine.CurrentEngine;
}
else
{
_Engine = engine;
}
}
/// <summary>
/// 创建一个与事务关联的 <see cref="Wunion.DataAdapter.Kernel.QuickDataChanger"/> 对象实例。
/// </summary>
/// <param name="transController">关联到该对象的事务控制器。</param>
/// <param name="engine">执行数据库交互的引擎对象。</param>
public QuickDataChanger(DBTransactionController transController, DataEngine engine = null)
{
_Conditions = new List <object>();
Trans = transController;
if (engine == null)
{
_Engine = DataEngine.CurrentEngine;
}
else
{
_Engine = engine;
}
}
/// <summary>
/// 清理引擎池中，除默认引擎外的所有其他引擎。
/// </summary>
public static void EnginePoolsClean()
{
if (DataEnginePools == null)
{
return;
}
DataEngine Default = DataEnginePools["Default"];
DataEnginePools.Clear();
DataEnginePools.Add("Default", Default);
// 清理完成后将当前引擎设置为默认引擎，不然如果当前引擎已被切换为默认引擎以外的其它引擎时就会出错。
DataEngine.CurrentEngine = Default;
_CurrentEngineStatus = ENGINE_IS_DEFAULT;
}
/// <summary>
/// 向引擎池中添加一个引擎(注：需要在组件的支持范围内)。
/// </summary>
/// <param name="Dba">该引擎与数据库进行交互的访问器。</param>
/// <param name="parserAdapter">该引擎用的解析命令的适配器。</param>
/// <param name="key">该引擎在引擎池中的键名称。</param>
public static void AppendDataEngine(DbAccess Dba, ParserAdapter parserAdapter, string key = "Default")
{
if (DataEnginePools == null)
{
DataEnginePools = new Dictionary <string, DataEngine>();
}
if (DataEnginePools.ContainsKey(key))
{
return;
}
DataEngine Engine = new DataEngine(Dba, parserAdapter);
DataEnginePools.Add(key, Engine);
if (key.ToUpper() == "DEFAULT")
{
DataEngine.CurrentEngine = Engine;
}
}
/// <summary>
/// 创建一个 <see cref="BatchCommander"/> 的对象实例.
/// </summary>
/// <param name="database">此提供程序使用的数据库引擎.</param>
public BatchCommander(DataEngine database)
{
Engine = database;
}