/// <summary>
/// 重新构造二叉树
/// </summary>
/// <param name="strExpression">表达式</param>
public void ChangeExpression(string strExpression)
{
_Expression = strExpression;
_Tree = null;
_Position = 0;
_Identifiers = null;
_CurrentIdentifier = null;
_ParentIdentifier = null;
if (strExpression != string.Empty)
{
try
{
_ExpressionChars = new Char[strExpression.Length + 1];
strExpression.CopyTo(0, _ExpressionChars, 0, strExpression.Length);
_ExpressionChars[strExpression.Length] = '\0';
_Tree = DoExpression();
if (_ExpressionChars[_Position] != '\0')
{
throw ParsingException.NewParsingException(Parse_Error.peSyntaxError, _Position);
}
}
finally
{
_CurrentIdentifier = null;
_ParentIdentifier = null;
}
}
}
//私有方法
/// <summary>
/// 顺序输出标识符
/// </summary>
/// <param name="oID"></param>
/// <param name="strID"></param>
/// <param name="nPos"></param>
private void OutputID(Operation_IDs oID, string strID, int nPos)
{
if (OutputIdentifiers)
{
ParseIdentifier pi = new ParseIdentifier(oID, strID, nPos, _CurrentIdentifier);
if (_CurrentIdentifier == null)
{
if (_ParentIdentifier == null)
{
_Identifiers = pi;
}
else
{
_ParentIdentifier._SubIdentifier = pi;
}
}
else
{
_CurrentIdentifier._NextIdentifier = pi;
}
pi._ParentIdentifier = _ParentIdentifier;
_CurrentIdentifier = pi;
}
}
/// <summary>
/// 构造函数
/// </summary>
/// <param name="oID"></param>
/// <param name="strID"></param>
/// <param name="nPos"></param>
/// <param name="prev"></param>
public ParseIdentifier(Operation_IDs oID, string strID, int nPos, ParseIdentifier prev)
{
_OperationID = oID;
_Identifier = strID;
_Position = nPos;
_PrevIdentifier = prev;
}
//得到表达式中对人员所属的限定信息
private static string GetBelongTo(string strExp)
{
ParseExpression pe = new ParseExpression();
pe.OutputIdentifiers = true;
pe.UserFunctions = (IExpParsing) new DoExpParsing();
pe.ChangeExpression(strExp);
ParseIdentifier pi = GetIdentifiers(pe.Identifiers, "belongto");
if (pi == null)
{
return("");
}
string strValue = String.Empty;
//得到类别
pi = pi.SubIdentifier.NextIdentifier;
strValue = pi.Identifier.ToUpper();
//得到objId
pi = pi.NextIdentifier.NextIdentifier;
strValue += "," + pi.Identifier;
//得到parentId
pi = pi.NextIdentifier.NextIdentifier;
strValue += "," + pi.Identifier;
return(strValue.Replace("\"", ""));
}
//获得表达式中定义的人员级别限定信息
private static string GetUserRank(string strExp)
{
ParseExpression pe = new ParseExpression();
pe.OutputIdentifiers = true;
pe.UserFunctions = (IExpParsing) new DoExpParsing();
pe.ChangeExpression(strExp);
ParseIdentifier pi = GetIdentifiers(pe.Identifiers, "UserRank");
if (pi == null)
{
return("");
}
string strValue = String.Empty;
//得到限定的级别
pi = pi.SubIdentifier.NextIdentifier;
strValue = pi.Identifier;
//得到操作符
pi = pi.NextIdentifier.NextIdentifier;
strValue = pi.Identifier + "," + strValue;
return(strValue.Replace("\"", ""));
}
private void OutputIDToParentLevel()
{
if (_ParentIdentifier != null)
{
_CurrentIdentifier = _ParentIdentifier;
_ParentIdentifier = _ParentIdentifier._ParentIdentifier;
}
}
/// <summary>
/// 在Debug窗口输出调试值
/// </summary>
/// <param name="pi"></param>
public static void OutputIdentifiers(ParseIdentifier pi)
{
while (pi != null)
{
Trace.WriteLine(new string('\t', _Level) + string.Format("ID:{0}\tPosition: {1}", pi.Identifier, pi.Position));
if (pi.SubIdentifier != null)
{
_Level++;
OutputIdentifiers(pi.SubIdentifier);
_Level--;
}
pi = pi.NextIdentifier;
}
}
private static ParseIdentifier GetIdentifiers(ParseIdentifier pi, string strID)
{
while (pi != null)
{
if (pi.Identifier.ToLower() == strID.ToLower())
{
return(pi);
}
if (pi.SubIdentifier != null)
{
ParseIdentifier piTemp = GetIdentifiers(pi.SubIdentifier, strID);
if (piTemp != null)
{
return(piTemp);
}
}
pi = pi.NextIdentifier;
}
return(null);
}
/// <summary>
/// 构造函数
/// </summary>
/// <param name="oID"></param>
/// <param name="strID"></param>
/// <param name="nPos"></param>
/// <param name="prev"></param>
public ParseIdentifier(Operation_IDs oID, string strID, int nPos, ParseIdentifier prev)
{
_OperationID = oID;
_Identifier = strID;
_Position = nPos;
_PrevIdentifier = prev;
}
private void OutputIDToParentLevel()
{
if (_ParentIdentifier != null)
{
_CurrentIdentifier = _ParentIdentifier;
_ParentIdentifier = _ParentIdentifier._ParentIdentifier;
}
}
private void OutputIDToSubLevel()
{
_ParentIdentifier = _CurrentIdentifier;
_CurrentIdentifier = null;
}
//私有方法
/// <summary>
/// 顺序输出标识符
/// </summary>
/// <param name="oID"></param>
/// <param name="strID"></param>
/// <param name="nPos"></param>
private void OutputID(Operation_IDs oID, string strID, int nPos)
{
if (OutputIdentifiers)
{
ParseIdentifier pi = new ParseIdentifier(oID, strID, nPos, _CurrentIdentifier);
if (_CurrentIdentifier == null)
{
if (_ParentIdentifier == null)
_Identifiers = pi;
else
_ParentIdentifier._SubIdentifier = pi;
}
else
_CurrentIdentifier._NextIdentifier = pi;
pi._ParentIdentifier = _ParentIdentifier;
_CurrentIdentifier = pi;
}
}
/// <summary>
/// 重新构造二叉树
/// </summary>
/// <param name="strExpression">表达式</param>
public void ChangeExpression(string strExpression)
{
_Expression = strExpression;
_Tree = null;
_Position = 0;
_Identifiers = null;
_CurrentIdentifier = null;
_ParentIdentifier = null;
if (strExpression != string.Empty)
{
try
{
_ExpressionChars = new Char[strExpression.Length + 1];
strExpression.CopyTo(0, _ExpressionChars, 0, strExpression.Length);
_ExpressionChars[strExpression.Length] = '\0';
_Tree = DoExpression();
if (_ExpressionChars[_Position] != '\0')
throw ParsingException.NewParsingException(Parse_Error.peSyntaxError, _Position);
}
finally
{
_CurrentIdentifier = null;
_ParentIdentifier = null;
}
}
}
/// <summary>
/// 在Debug窗口输出调试值
/// </summary>
/// <param name="pi"></param>
public static void OutputIdentifiers(ParseIdentifier pi)
{
while (pi != null)
{
Trace.WriteLine(new string('\t', _Level) + string.Format("ID:{0}\tPosition: {1}", pi.Identifier, pi.Position));
if (pi.SubIdentifier != null)
{
_Level++;
OutputIdentifiers(pi.SubIdentifier);
_Level--;
}
pi = pi.NextIdentifier;
}
}
private static ParseIdentifier GetIdentifiers(ParseIdentifier pi, string strID)
{
while (pi != null)
{
if (pi.Identifier.ToLower() == strID.ToLower())
return pi;
if (pi.SubIdentifier != null)
{
ParseIdentifier piTemp = GetIdentifiers(pi.SubIdentifier, strID);
if (piTemp != null)
return piTemp;
}
pi = pi.NextIdentifier;
}
return null;
}
private void OutputIDToSubLevel()
{
_ParentIdentifier = _CurrentIdentifier;
_CurrentIdentifier = null;
}
