/// <summary>
/// 切割未知字符
/// 如 japannese alpha
/// arabic kraon
/// </summary>
/// <param name="ch"></param>
private void flexUnknowChar(char ch)
{
var w = new _WordInnfo();
var name = ch.ToString();
bool flag = false;
while (hasNext)
{
var b = next();
flag = true;
if (!Regex_Helper.Is_ACN(b.ToString()) && !Regex_Helper.Is_Mark(b.ToString()))
{
name += b;
}
else
{
break;
}
}
if (flag)
{
previous();
}
w.Name = name;
w.MaxType = WordType.Noun;
_susentence.Words.Add(w);
}
/// <summary>
/// 切割字母数字
/// </summary>
/// <param name="ch"></param>
private void flexNumberAlpha(char ch)
{
var name = ch.ToString();
/***************************
* 用于确定是否回跳
* 如果执行了 while 下面的语句
* 需要回跳一个字符
* *************************/
bool flag = false;
while (_currentPos < _context.Length - 1)
{
flag = true;
var b = next();
if (Regex_Helper.Is_AN(b.ToString()))
{
name += b;
}
/********************************
* website address, math expression
* *************************************/
else if (Regex_Helper.Is_Mark(b.ToString()))
{
/**********************
* if chinese mark ens prosses
* *************************/
if (Regex_Helper.Is_Chinese_Mark(b.ToString()))
{
break;
}
name += b;
}
else
{
break;
}
}
var w = new _WordInnfo()
{
Name = name,
};
/**********************
* 设置获得片段的词性
* 可能是数词，也可能是其他（数学表达式，网址等）
* ************************/
SetAlphaNumberType(w);
if (flag)
{
previous();
}
w.Name = name;
_susentence.Words.Add(w);
}
/// <summary>
/// 切分一些特殊字符
/// </summary>
/// <returns></returns>
private bool workSpecialChars()
{
/****************************************************
* 处理以字母（包括希腊字母）数字英文标点开始的字符片段
* e-mail,
* addreess
* mathexpression
* and so on
* *******************************************************/
if (Regex_Helper.Is_AN(_token.ToString()) || Regex_Helper.Is_Concrete_Number(_token.ToString()) || Regex_Helper.Is_English_Mark(_token.ToString()))
{
flexNumberAlpha(_token);
return(true);
}
/*********************************
* 处理未知字符开始的字符片段
* 其他语言的文字 （日文，韩文等）
* *******************************/
if (!Regex_Helper.Is_ACN(_token.ToString()) && !Regex_Helper.Is_Mark(_token.ToString()))
{
flexUnknowChar(_token);
return(true);
}
return(false);
}
/// <summary>
/// 反向分词函数，读取未知字符序列
/// </summary>
/// <param name="ls">反向分词结果的词链表</param>
/// <param name="temp">要进行反向分词的字符串序列</param>
/// <param name="i">当前扫描位置</param>
private void reflexUnknowChars(List <_WordInnfo> ls, ref string temp, ref int i)
{
var temps = temp[i].ToString();
var _w = new _WordInnfo();
for (int j = i + 1; j < temp.Length; j++, i++)
{
if (!Regex_Helper.Is_ACN(temp[j].ToString()) && !Regex_Helper.Is_Mark(temp[j].ToString()))
{
temps += temp[j];
}
else
{
i++;
break;
}
}
_w.Name = temps;
_w.MaxType = WordType.Noun;
ls.Add(_w);
if (i != temp.Length - 1)
{
i--;
}
}
/// <summary>
/// 分词
/// </summary>
/// <param name="temp"></param>
/// <returns></returns>
public List <_WordInnfo> Reflex(string temp)
{
var ls = new List <_WordInnfo>();
/*******************
* 获取有问题的字符串
* **************/
Search_Tree_Node <_WordInnfo> current_node = null;
Search_Tree_Node <_WordInnfo> max_node = null;
int searchTime = 0;
int max_time = 0;
bool isSearchFromTheTree = true;
for (int i = 0; i < temp.Length; i++)
{
/****************************
* 处理数字、字母、未知字符
* ****************************/
if (searchTime == 0)
{
/********************字母、数字*************************/
if (Regex_Helper.Is_Math_Expression(temp[i].ToString()))
{
reflexNumberAlpha(ls, ref temp, ref i);
continue;
}
/***********************未知字符********************************/
if (!Regex_Helper.Is_ACN(temp[i].ToString()) && !Regex_Helper.Is_Mark(temp[i].ToString()))
{
reflexUnknowChars(ls, ref temp, ref i);
continue;
}
}
/******************
* 增加搜索次数
* *********************/
searchTime++;
if (isSearchFromTheTree)
{
current_node = _provider.NegtiveDic.Get_Node(temp[i].ToString());
isSearchFromTheTree = false;
/***************
* 是否结束分词
* ********************/
if (current_node == null)
{
endReflex(ref temp, ls, ref i, ref searchTime, ref max_time, ref isSearchFromTheTree, current_node, ref max_node);
}
else
/*************
* 是否更新maxnode
* ********************/
if (!current_node.Is_Empty)
{
max_node = current_node;
max_time = searchTime;
}
}
else
{
current_node = current_node.Get_Child(temp[i]);
/***************
* 是否结束分词
* ********************/
if (current_node == null)
{
endReflex(ref temp, ls, ref i, ref searchTime, ref max_time, ref isSearchFromTheTree, current_node, ref max_node);
}
else
/*************
* 是否更新maxnode
* ********************/
if (!current_node.Is_Empty)
{
max_node = current_node;
max_time = searchTime - 1;
}
}
}
/******************
* 扫描结束处理
* **********************/
afterReflex(ls, current_node, max_node, temp);
/****************反转链表******************/
reverseList(ls);
return(ls);
}
