/// <summary>
/// 转换树Id类型（在原树上修改Id）
/// </summary>
/// <typeparam name="T"></typeparam>
/// <typeparam name="TType"></typeparam>
/// <typeparam name="TToType"></typeparam>
/// <param name="param"></param>
public static void Generate <T, TType, TToType>(TreeTypeParam <T, TType, TToType> param) where T : class
{
if (param.TreeLists.Count == 0)
{
return;
}
if (param.TreeLists.Count > param.NewIds.Count)
{
throw new Exception($"新Id数量不足");
}
if (param.NewIds.Contains(default(TToType)))
{
throw new Exception($"新Id不能含有值{default(TToType)}");
}
var model = new TreeTypeModel <T, TType, TToType>();
var type = typeof(T);
model.GetId = param.IdField.Compile();
model.SetId = type.GetProperty(param.IdField.GetPropertyName());
model.GetParentId = param.ParentIdField.Compile();
model.SetParentId = type.GetProperty(param.ParentIdField.GetPropertyName());
model.GetToId = param.ToIdField.Compile();
model.SetToId = type.GetProperty(param.ToIdField.GetPropertyName());
model.GetToParentId = param.ToParentIdField.Compile();
model.SetToParentId = type.GetProperty(param.ToParentIdField.GetPropertyName());
Begin(param, model);
}
/// <summary>
/// 转换树Id类型
/// </summary>
/// <typeparam name="T"></typeparam>
/// <typeparam name="TType"></typeparam>
/// <typeparam name="TToType"></typeparam>
/// <param name="param"></param>
/// <param name="model"></param>
private static void Begin <T, TType, TToType>(TreeTypeParam <T, TType, TToType> param, TreeTypeModel <T, TType, TToType> model) where T : class
{
//顶级节点
var topNodes = param.TreeLists.GetTopNodes(model.GetId, model.GetParentId);
foreach (var item in topNodes)
{
var childs = param.TreeLists.GetChildNodes(model.GetId.Invoke(item), model.GetId, model.GetParentId, false);
Recursive(childs, item, default(TToType), param, model);
}
}
/// <summary>
/// 复制树
/// </summary>
/// <param name="list"></param>
/// <param name="newParentValue"></param>
/// <param name="param"></param>
/// <param name="model"></param>
/// <param name="item"></param>
private static void Recursive <T, TType, TToType>(List <T> list, T item, TToType newParentValue, TreeTypeParam <T, TType, TToType> param, TreeTypeModel <T, TType, TToType> model) where T : class
{
var childs = list.Where(p => model.GetParentId.Invoke(p).Equals(model.GetId.Invoke(item))).ToList();
var newId = param.GetNewId();
model.SetToId.SetValue(item, newId);
model.SetToParentId.SetValue(item, newParentValue);
foreach (var child in childs)
{
Recursive(list, child, newId, param, model);
}
}
/// <summary>
/// 转换树Id类型（在原树上修改Id）
/// </summary>
/// <typeparam name="T"></typeparam>
/// <typeparam name="TType"></typeparam>
/// <typeparam name="TToType"></typeparam>
/// <param name="param"></param>
public static List <T> ToTreeNewIdType <T, TType, TToType>(TreeTypeParam <T, TType, TToType> param) where T : class
{
NewTreeTypeUtility.Generate(param);
return(param.TreeLists);
}