/// <summary>
/// 从给定的提交句柄对象创建 SubmissionDataProvider 类的新实例。
/// </summary>
/// <param name="handle">提交句柄对象。</param>
/// <param name="isReadonly">一个值，该值指示创建的对象是否为只读。</param>
/// <returns>创建的 SubmissionDataProvider 类对象。</returns>
/// <exception cref="ArgumentNullException"/>
/// <exception cref="SubmissionNotExistException"/>
public static SubmissionDataProvider Create(SubmissionHandle handle, bool isReadonly)
{
if (handle == null)
{
throw new ArgumentNullException(nameof(handle));
}
SubmissionDataContext context = new SubmissionDataContextFactory().CreateContext();
SubmissionEntity entity = context.QuerySubmissionEntityById(handle.SubmissionId);
if (entity == null)
{
context.Dispose();
throw new SubmissionNotExistException(handle);
}
return(new SubmissionDataProvider(context, entity, isReadonly));
}
/// <summary>
/// 创建 SubmissionManager 类的新实例。
/// </summary>
private SubmissionManager()
{
m_factory = new SubmissionDataContextFactory();
}
