internal HierarchicalNodeToken(string name, HierarchicalNode current, HierarchicalNode parent = null)
{
this.Name = name;
this.Current = current;
this.Parent = parent ?? (current != null ? current.InnerParent : null);
}
protected HierarchicalNode(string name, HierarchicalNode parent, char pathSeparatorChar = DefaultPathSeparatorChar)
{
if (string.IsNullOrWhiteSpace(name))
{
throw new ArgumentNullException("name");
}
if (name.Contains(pathSeparatorChar.ToString()))
{
throw new ArgumentException("The name contains path separator char.");
}
if (JF.Common.StringExtensions.ContainsCharacters(name, @"./\*?!@#$%^&"))
{
throw new ArgumentException("The name contains invalid character(s).");
}
_name = name.Trim();
_parent = parent;
PathSeparatorChar = pathSeparatorChar;
}
internal protected HierarchicalNode FindNode(string[] paths, Func <HierarchicalNodeToken, HierarchicalNode> onStep = null)
{
if (paths == null || paths.Length == 0)
{
return(null);
}
//确保当前子节点集合已经被加载过
this.EnsureChildren();
//当前节点默认为本节点
var current = this;
//如果第一个部分是空字符则表示路径是以斜杠(/)打头或第一个部分是以斜杠(/)打头则从根节点开始查找
if (string.IsNullOrWhiteSpace(paths[0]) || paths[0].Trim()[0] == PathSeparatorChar)
{
current = this.FindRoot();
}
int pathIndex = 0, partIndex = 0;
string[] parts = null;
while (current != null && pathIndex < paths.Length)
{
var part = string.Empty;
HierarchicalNode parent = null;
if (parts == null && paths[pathIndex].Contains(PathSeparatorChar.ToString()))
{
parts = paths[pathIndex].Split(PathSeparatorChar);
partIndex = 0;
}
if (parts == null)
{
part = paths[pathIndex++].Trim();
}
else
{
if (partIndex < parts.Length)
{
part = parts[partIndex++].Trim();
}
else
{
parts = null;
pathIndex++;
continue;
}
}
switch (part)
{
case "":
case ".":
continue;
case "..":
current = current._parent;
parent = current != null ? current._parent : null;
break;
default:
parent = current;
current = current.GetChild(part);
break;
}
if (onStep != null)
{
current = onStep(new HierarchicalNodeToken(part, current, parent));
if (current == null)
{
return(null);
}
}
}
return(current);
}
