/// <summary>
/// 添加一个 ExtractItem 项。
/// </summary>
/// <param name="mode">提取模式。</param>
/// <param name="path">提取所在路径。</param>
/// <param name="owner">拥有该提取项的设备。</param>
/// <returns>ExtractItem 类型实例。</returns>
public ExtractItem AddExtract(String mode, String path, DeviceExtraction owner)
{
ExtractItem item = ExtractItem.New(mode, path, owner);
AddExtract(item, owner);
return(item);
}
/// <summary>
/// 移除一个 ExtractItem 项。
/// </summary>
/// <param name="item">提取项。</param>
/// <param name="owner">拥有该提取项的设备。</param>
/// <returns>如果该提取项并不存在，则忽略并返回false；否则移除并返回true。</returns>
public Boolean RemoveExtract(ExtractItem item, DeviceExtraction owner)
{
if (item == null)
{
return(false);
}
IEnumerable <ExtractItem> extractItems = GetAllExtractItems(owner);
ExtractItem found = extractItems.SingleOrDefault(x => x == item);
if (found == null)
{
return(false);
}
item.Element.Remove();
return(true);
}
/// <summary>
/// 添加一个 ExtractItem 项。
/// </summary>
/// <param name="item">提取项。</param>
/// <param name="owner">拥有该提取项的设备。</param>
/// <returns>如果已存在相同的提取项，则忽略并返回false；否则添加并返回true。</returns>
public Boolean AddExtract(ExtractItem item, DeviceExtraction owner)
{
if (item == null)
{
return(false);
}
if (!item.IsValid)
{
return(false);
}
IEnumerable <ExtractItem> extractItems = GetAllExtractItems(owner);
ExtractItem found = extractItems.SingleOrDefault(x => x == item);
if (found != null)
{
return(false);
}
_itemGroup.Add(item.Element);
return(true);
}
