public XTSimpleXMLSection Open(string file, bool create, Encoding enc)
{
XTSimpleXMLSection sect = null;
file = XTPath.NormalizePath(file);
string fullPath = System.IO.Path.Combine(this.m_root, file);
if (sm_caches.ContainsKey(fullPath))
{
sect = sm_caches[fullPath];
}
if (sect == null)
{
string text = "";
if (File.Exists(fullPath))
{
StreamReader reader = new StreamReader(fullPath, enc);
text = reader.ReadToEnd();
reader.Close();
}
else if (create)
{
string path = Path.GetDirectoryName(fullPath);
Directory.CreateDirectory(path);
}
else
{
throw new System.IO.FileNotFoundException(
string.Format("xml file '{0}' is not exist!", file));
}
sect = Explain(fullPath, text);
sm_caches[fullPath] = sect;
}
return(sect);
}
static private XTSimpleXMLSection Explain(string fileName, string text)
{
text = text.Trim();
if (text == "")
{
string name = Path.GetFileName(fileName);
return(new XTSimpleXMLSection(name, 0, "", fileName));
}
if (!text.StartsWith("<"))
{
throw new ErrorXMLException(fileName, 1);
}
string orign = text;
int pointer = 0;
XTSimpleXMLSection root = null;
Stack <XTSimpleXMLSection> sects = new Stack <XTSimpleXMLSection>();
Match match;
string tagName;
while (true)
{
if (text == "")
{
break;
}
if (text.StartsWith("<!--"))
{
match = RePtns.ReptnComment.Match(text);
if (match == null || !match.Success)
{
int lineNO = GetLineCount(orign, pointer);
throw new ErrorCommentXMLException(fileName, lineNO);
}
pointer += match.Length;
text = text.Substring(match.Length);
}
else if (text.StartsWith("</")) // 结束标记
{
if (sects.Count == 0) // 没有起始标记的结束标记
{
match = Regex.Match(text.Remove(0, 2),
string.Format("^[^{0}]*", RePtns.ErrTagChars)); // 找出该没起始 tag 的结束 tag
int lineNO = GetLineCount(orign, pointer);
throw new UnstartedXMLException(fileName, lineNO, match.Value);
}
match = RePtns.ReptnEndTag.Match(text);
if (!match.Success) // 错误的结束标记
{
int lineNO = GetLineCount(orign, pointer);
throw new UnterminatedXMLException(fileName, lineNO, sects.Peek().Name);
}
tagName = match.Groups[1].Value;
if (tagName == sects.Peek().Name) // 去掉一个嵌套
{
sects.Pop();
int index = match.Index + match.Length;
pointer += index;
text = text.Substring(index, text.Length - index);
if (sects.Count == 0)
{
break;
}
}
else // 结束 tag 与起始 tag 不一致
{
int lineNO = GetLineCount(orign, pointer);
throw new UnmatchTagXMLException(fileName,
lineNO, sects.Peek().Name, tagName);
}
}
else if (text.StartsWith("<")) // 起始标记
{
match = RePtns.ReptnStartTag.Match(text);
if (match != null && match.Success) // 寻找开始 tag
{
tagName = match.Groups[1].Value;
string value = match.Groups[2].Value;
if (tagName == "") // 空 tag
{
int lineNO = GetLineCount(orign, pointer);
throw new EmptyTagXMLExceptin(fileName, lineNO);
}
XTSimpleXMLSection sect;
int layer = sects.Count;
if (layer > 0)
{
sect = new XTSimpleXMLSection(tagName, layer, value);
sects.Peek().AddSubSect(sect);
}
else
{
root = sect = new XTSimpleXMLSection(tagName, 0, value, fileName);
}
sects.Push(sect);
int index = match.Index + match.Length;
pointer += index;
text = text.Substring(index, text.Length - index);
}
else
{
match = RePtns.ReptnOneTagScope.Match(text); // <XXXX/>
if (match != null && match.Success)
{
tagName = match.Groups[1].Value;
if (tagName == "") // 空 tag
{
int lineNO = GetLineCount(orign, pointer);
throw new EmptyTagXMLExceptin(fileName, lineNO);
}
XTSimpleXMLSection sect;
int layer = sects.Count;
if (layer > 0)
{
sect = new XTSimpleXMLSection(tagName, layer);
sects.Peek().AddSubSect(sect);
}
else
{
root = sect = new XTSimpleXMLSection(tagName, 0, "", fileName);
}
int index = match.Index + match.Length;
pointer += index;
text = text.Substring(index, text.Length - index);
}
else // 不是合法的 tag
{
match = Regex.Match(text.Remove(0, 1),
string.Format("^[^{0}]*", RePtns.ErrTagChars)); // 找出该不合法的开始 tag
int lineNO = GetLineCount(orign, pointer);
tagName = match.Groups[1].Value;
throw new NoEndMarkXMLException(fileName, lineNO, tagName);
}
}
}
else // 标记以外的内容错误
{
int lineNO = GetLineCount(orign, pointer);
match = Regex.Match(text, "^[^\r\n]*");
if (!match.Success)
{
throw new ErrorXMLException(fileName, lineNO, "invalid xml file!");
}
throw new InvalidTagXMLException(fileName, lineNO, match.Value);
}
}
if (sects.Count > 0)
{
int lineNO = GetLineCount(orign, pointer);
throw new UnterminatedXMLException(fileName, lineNO, sects.Peek().Name);
}
if (text != "")
{
int lineNO = GetLineCount(orign, pointer);
throw new ErrorXMLException(fileName, lineNO);
}
return(root);
}