(精华)2020年6月27日 C#类库 父子数据相互映射帮助类
【摘要】
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq...
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
namespace Core.Util
{
/// <summary>
/// 父子数据相互映射类
/// 注：父子数据都必须唯一,即所有父键唯一,所有子键唯一,唯一的子键能确定对应的父键,唯一的父键能确定其拥有的子键集合,
/// </summary>
public class ParentChildrenMapping
{
#region 私有成员
private ConcurrentDictionary<string, string> _cToP { get; } = new ConcurrentDictionary<string, string>();
private ConcurrentDictionary<string, ConcurrentBag<string>> _pToC { get; } = new ConcurrentDictionary<string, ConcurrentBag<string>>();
#endregion
#region 外部接口
/// <summary>
/// 添加子键
/// </summary>
/// <param name="parentId">所属父键</param>
/// <param name="childId">子键</param>
public void AddChild(string parentId,string childId)
{
if (string.IsNullOrEmpty(parentId))
throw new Exception("父键不能为Null或空");
if(string.IsNullOrEmpty(childId))
throw new Exception("子键不能为Null或空");
if (_cToP.ContainsKey(childId))
throw new Exception("该子键已存在！");
ConcurrentBag<string> children = null;
if (!_pToC.ContainsKey(parentId))
{
children = new ConcurrentBag<string>();
_pToC[parentId] = children;
}
else
children = _pToC[parentId];
children.Add(childId);
_cToP[childId] = parentId;
}
/// <summary>
/// 删除子键
/// </summary>
/// <param name="parentId">所属父键</param>
/// <param name="childId">子键</param>
public void RemoveChild(string parentId, string childId)
{
if (string.IsNullOrEmpty(parentId))
throw new Exception("父键不能为Null或空");
if (string.IsNullOrEmpty(childId))
throw new Exception("子键不能为Null或空");
if (!_pToC.ContainsKey(parentId))
throw new Exception("该父键不存在");
if (!_cToP.ContainsKey(childId))
throw new Exception("该子键不存在");
var children = _pToC[parentId];
if (children == null)
throw new Exception("该父键不存在该子键");
if(!children.TryTake(out childId))
throw new Exception("该父键不存在该子键");
_cToP.TryRemove(childId, out string value);
}
/// <summary>
/// 删除父键
/// 注:会删除该父键以及该父键下面的所有子键
/// </summary>
/// <param name="parentId"></param>
public void RemoveParent(string parentId)
{
if (string.IsNullOrEmpty(parentId))
throw new Exception("父键不能为Null或空");
if (!_pToC.ContainsKey(parentId))
throw new Exception("父键不存在");
_pToC.TryRemove(parentId, out ConcurrentBag<string> children);
if (children != null)
{
var enumerator = children.GetEnumerator();
do
{
_cToP.TryRemove(enumerator.Current, out string value);
} while (enumerator.MoveNext());
}
}
/// <summary>
/// 父键是否存在
/// </summary>
/// <param name="parentId">父键</param>
/// <returns></returns>
public bool ExistsParent(string parentId)
{
if (string.IsNullOrEmpty(parentId))
throw new Exception("父键不能为Null或空");
return _pToC.ContainsKey(parentId);
}
/// <summary>
/// 子键是否存在
/// </summary>
/// <param name="childId">子键</param>
/// <returns></returns>
public bool ExistsChild(string childId)
{
if (string.IsNullOrEmpty(childId))
throw new Exception("子键不能为Null或空");
return _cToP.ContainsKey(childId);
}
/// <summary>
/// 获取父键拥有的所有子键
/// </summary>
/// <param name="parentId">父键</param>
/// <returns></returns>
public List<string> GetChildren(string parentId)
{
if (string.IsNullOrEmpty(parentId))
throw new Exception("父键不能为Null或空");
if (!_pToC.ContainsKey(parentId))
throw new Exception("父键不存在");
return _pToC[parentId]?.ToList() ?? new List<string>();
}
/// <summary>
/// 获取所有父键
/// </summary>
/// <returns></returns>
public List<string> GetAllParents()
{
return _pToC.Keys.ToList();
}
/// <summary>
/// 获取所有子键
/// </summary>
/// <returns></returns>
public List<string> GetAllChildren()
{
return _cToP.Keys.ToList();
}
/// <summary>
/// 获取父键
/// </summary>
/// <param name="childId">子键</param>
/// <returns></returns>
public string GetParent(string childId)
{
if (string.IsNullOrEmpty(childId))
throw new Exception("子键不能为Null或空");
if (!_cToP.ContainsKey(childId))
throw new Exception("该子键不存在");
return _cToP[childId];
}
#endregion
}
}
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文章来源: codeboy.blog.csdn.net，作者：愚公搬代码，版权归原作者所有，如需转载，请联系作者。
原文链接：codeboy.blog.csdn.net/article/details/106983060
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