Beispiel #1
0
        /// <summary>
        ///     This method helps recursivly retrieve propeties.
        /// </summary>
        /// <param name="o"></param>
        /// <param name="name"></param>
        /// <returns></returns>
        private ObjectItem Get_Value(object o, string name)
        {
            var parseError = "Parser error: the command line can't be evaluated!";

            var result = new ObjectItem(null, null);

            if (string.IsNullOrEmpty(name))
            {
                return(result);
            }

            var index = name.IndexOf('.');

            index = (index > 0) ? index : name.Length;
            var left = name.Substring(0, index);

            result = GetProperty(o, left);

            if (!string.IsNullOrEmpty(result.Error))
            {
                result.Error = parseError;
            }

            if (left != name)
            {
                if (result.Value == null)
                {
                    result.Error = parseError;
                }
                else
                {
                    result = Get_Value(result.Value, name.Substring(index + 1));
                }
            }

            return(result);
        }
Beispiel #2
0
        /// <summary>
        ///     Recursively parse the command line content
        /// </summary>
        /// <param name="commandLine"></param>
        private void DoParse(string commandLine)
        {
            string strLeft;
            string strRight;
            object left;
            var    str = commandLine.Replace("  ", " ");

            str = str.Trim();
            //Asignment
            if (str.Contains("="))
            {
                var strs = str.Split('=');
                if (strs.Length != 2 || strs[0].Length == 0 || str[1] == 0)
                {
                    Result.Error = "syntax error: Don't know how to do Assignment!";
                    return;
                }
                strLeft  = strRight = string.Empty;
                strLeft  = strs[0];
                strRight = strs[1];
                strLeft  = strLeft.Trim();
                strRight = strRight.Trim();
                Result   = new CommandLine(strRight, _table).Result;

                //Set a value to a variable in the Table.
                if (_table.Contains(strLeft))
                {
                    _table.Remove(strLeft);
                    _table.Add(strLeft, Result.Value);
                }
                //Assign a value to a property.
                else if (strLeft.Contains("."))
                {
                    left =
                        new CommandLine(strLeft.Substring(0, strLeft.LastIndexOf(".", StringComparison.Ordinal)), _table)
                        .Result.Value;
                    if (left != null)
                    {
                        ReflectionUtils.SetProperty(left,
                                                    strLeft.Substring(strLeft.LastIndexOf(".", StringComparison.Ordinal) + 1),
                                                    Result.Value);
                    }
                    else
                    {
                        Result.Error = "Failed: can't set value to " + strLeft + "!";
                    }
                }
                //Make a declaration
                else
                {
                    _table.Add(strLeft, Result.Value);
                }
            }
            //Invoke a method, Creating a object.
            else if (str.EndsWith(")"))
            {
                if (str.StartsWith("new "))
                {
                    str = str.Substring(4).Trim();
                }
                left     = null;
                strRight = strLeft = str.Substring(0, str.IndexOf("(", StringComparison.Ordinal));

                //If there is a dot, invoke a method from an object
                if (strLeft.LastIndexOf(".", StringComparison.Ordinal) >= 0)
                {
                    strLeft = strLeft.Substring(0, strLeft.LastIndexOf(".", StringComparison.Ordinal));
                    left    = new CommandLine(strLeft, _table).Result.Value;
                }

                //When left is null, invoke a constructor, otherwise invoke a method.
                if (left != null)
                {
                    //Get the command line start from the method name
                    //this will get the argument list.
                    str = str.Substring(strRight.LastIndexOf(".", StringComparison.Ordinal) + 1);
                }

                Result.Value = InvokMethod(str, left);
            }

            //Retrive data
            else
            {
                if (_table.Contains(str))
                {
                    Result.Value = _table[str];
                    return;
                }
                left     = null;
                strRight = str;

                if (str.Contains("."))
                {
                    strLeft = str.Substring(0, str.IndexOf(".", StringComparison.Ordinal));
                    left    = _table[strLeft];

                    //If an object is found in a Table, the property name is needed in order to retrieve the value.
                    if (left != null && str.Length - (strLeft.Length + 1) > 0)
                    {
                        strRight = str.Substring(str.IndexOf(".", StringComparison.Ordinal) + 1,
                                                 str.Length - (strLeft.Length + 1));
                    }
                }

                Result = Get_Value(left, strRight);

                if (!string.IsNullOrEmpty(Result.Error))
                {
                    //If the expression is just for a static member of a class
                    Result = GetProperty(null, strRight);
                }
            }
        }
Beispiel #3
0
 /// <summary>
 ///     constructor
 /// </summary>
 /// <param name="commandLine"></param>
 /// <param name="table"></param>
 public CommandLine(string commandLine, Hashtable table)
 {
     _table = table;
     Result = new ObjectItem(null, null);
     DoParse(commandLine);
 }
Beispiel #4
0
        /// <summary>
        ///     Recursively parse the command line content
        /// </summary>
        /// <param name="commandLine"></param>
        private void DoParse(string commandLine)
        {
            string strLeft;
            string strRight;
            object left;
            var str = commandLine.Replace("  ", " ");
            str = str.Trim();
            //Asignment
            if (str.Contains("="))
            {
                var strs = str.Split('=');
                if (strs.Length != 2 || strs[0].Length == 0 || str[1] == 0)
                {
                    Result.Error = "syntax error: Don't know how to do Assignment!";
                    return;
                }
                strLeft = strRight = string.Empty;
                strLeft = strs[0];
                strRight = strs[1];
                strLeft = strLeft.Trim();
                strRight = strRight.Trim();
                Result = new CommandLine(strRight, _table).Result;

                //Set a value to a variable in the Table.
                if (_table.Contains(strLeft))
                {
                    _table.Remove(strLeft);
                    _table.Add(strLeft, Result.Value);
                }
                //Assign a value to a property.
                else if (strLeft.Contains("."))
                {
                    left =
                        new CommandLine(strLeft.Substring(0, strLeft.LastIndexOf(".", StringComparison.Ordinal)), _table)
                            .Result.Value;
                    if (left != null)
                    {
                        ReflectionUtils.SetProperty(left,
                            strLeft.Substring(strLeft.LastIndexOf(".", StringComparison.Ordinal) + 1),
                            Result.Value);
                    }
                    else
                    {
                        Result.Error = "Failed: can't set value to " + strLeft + "!";
                    }
                }
                //Make a declaration
                else
                {
                    _table.Add(strLeft, Result.Value);
                }
            }
            //Invoke a method, Creating a object.
            else if (str.EndsWith(")"))
            {
                if (str.StartsWith("new "))
                {
                    str = str.Substring(4).Trim();
                }
                left = null;
                strRight = strLeft = str.Substring(0, str.IndexOf("(", StringComparison.Ordinal));

                //If there is a dot, invoke a method from an object
                if (strLeft.LastIndexOf(".", StringComparison.Ordinal) >= 0)
                {
                    strLeft = strLeft.Substring(0, strLeft.LastIndexOf(".", StringComparison.Ordinal));
                    left = new CommandLine(strLeft, _table).Result.Value;
                }

                //When left is null, invoke a constructor, otherwise invoke a method.
                if (left != null)
                {
                    //Get the command line start from the method name
                    //this will get the argument list.
                    str = str.Substring(strRight.LastIndexOf(".", StringComparison.Ordinal) + 1);
                }

                Result.Value = InvokMethod(str, left);
            }

            //Retrive data
            else
            {
                if (_table.Contains(str))
                {
                    Result.Value = _table[str];
                    return;
                }
                left = null;
                strRight = str;

                if (str.Contains("."))
                {
                    strLeft = str.Substring(0, str.IndexOf(".", StringComparison.Ordinal));
                    left = _table[strLeft];

                    //If an object is found in a Table, the property name is needed in order to retrieve the value.
                    if (left != null && str.Length - (strLeft.Length + 1) > 0)
                    {
                        strRight = str.Substring(str.IndexOf(".", StringComparison.Ordinal) + 1,
                            str.Length - (strLeft.Length + 1));
                    }
                }

                Result = Get_Value(left, strRight);

                if (!string.IsNullOrEmpty(Result.Error))
                {
                    //If the expression is just for a static member of a class
                    Result = GetProperty(null, strRight);
                }
            }
        }
Beispiel #5
0
        /// <summary>
        ///     This method helps recursivly retrieve propeties.
        /// </summary>
        /// <param name="o"></param>
        /// <param name="name"></param>
        /// <returns></returns>
        private ObjectItem Get_Value(object o, string name)
        {
            var parseError = "Parser error: the command line can't be evaluated!";

            var result = new ObjectItem(null, null);
            if (string.IsNullOrEmpty(name))
            {
                return result;
            }

            var index = name.IndexOf('.');
            index = (index > 0) ? index : name.Length;
            var left = name.Substring(0, index);

            result = GetProperty(o, left);

            if (!string.IsNullOrEmpty(result.Error))
            {
                result.Error = parseError;
            }

            if (left != name)
            {
                if (result.Value == null)
                {
                    result.Error = parseError;
                }
                else
                {
                    result = Get_Value(result.Value, name.Substring(index + 1));
                }
            }

            return result;
        }
Beispiel #6
0
 /// <summary>
 ///     constructor
 /// </summary>
 /// <param name="commandLine"></param>
 /// <param name="table"></param>
 public CommandLine(string commandLine, Hashtable table)
 {
     _table = table;
     Result = new ObjectItem(null, null);
     DoParse(commandLine);
 }