public static ArgumentType ( string function, int arg, |
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function | string | |
arg | int | |
type | ||
Результат |
private Type GetDataType(ExpressionNode node) { Type nodeType = node.GetType(); string typeName = null; if (nodeType == typeof(NameNode)) { typeName = ((NameNode)node)._name; } if (nodeType == typeof(ConstNode)) { typeName = ((ConstNode)node)._val.ToString(); } if (typeName == null) { throw ExprException.ArgumentType(s_funcs[_info]._name, 2, typeof(Type)); } Type dataType = Type.GetType(typeName); if (dataType == null) { throw ExprException.InvalidType(typeName); } // ReadXml might not be on the current call stack. So we'll use the TypeLimiter // that was captured when this FunctionNode instance was created. TypeLimiter.EnsureTypeIsAllowed(dataType, _capturedLimiter); return(dataType); }
private Type GetDataType(ExpressionNode node) { Type nodeType = node.GetType(); string typeName = null; if (nodeType == typeof(NameNode)) { typeName = ((NameNode)node)._name; } if (nodeType == typeof(ConstNode)) { typeName = ((ConstNode)node)._val.ToString(); } if (typeName == null) { throw ExprException.ArgumentType(s_funcs[_info]._name, 2, typeof(Type)); } Type dataType = Type.GetType(typeName); if (dataType == null) { throw ExprException.InvalidType(typeName); } return(dataType); }
internal override object Eval(DataRow row, DataRowVersion version) { Debug.Assert(_info < s_funcs.Length && _info >= 0, "Invalid function info."); object[] argumentValues = new object[_argumentCount]; Debug.Assert(_argumentCount == s_funcs[_info]._argumentCount || s_funcs[_info]._isVariantArgumentList, "Invalid argument argumentCount."); // special case of the Convert function if (s_funcs[_info]._id == FunctionId.Convert) { if (_argumentCount != 2) { throw ExprException.FunctionArgumentCount(_name); } argumentValues[0] = _arguments[0].Eval(row, version); argumentValues[1] = GetDataType(_arguments[1]); } else if (s_funcs[_info]._id != FunctionId.Iif) { // We do not want to evaluate arguments of IIF, we will already do it in EvalFunction/ second point: we may go to div by 0 for (int i = 0; i < _argumentCount; i++) { argumentValues[i] = _arguments[i].Eval(row, version); if (s_funcs[_info]._isValidateArguments) { if ((argumentValues[i] == DBNull.Value) || (typeof(object) == s_funcs[_info]._parameters[i])) { // currently all supported functions with IsValidateArguments set to true // NOTE: for IIF and ISNULL IsValidateArguments set to false return(DBNull.Value); } if (argumentValues[i].GetType() != s_funcs[_info]._parameters[i]) { // We are allowing conversions in one very specific case: int, int64,...'nice' numeric to numeric.. if (s_funcs[_info]._parameters[i] == typeof(int) && ExpressionNode.IsInteger(DataStorage.GetStorageType(argumentValues[i].GetType()))) { argumentValues[i] = Convert.ToInt32(argumentValues[i], FormatProvider); } else if ((s_funcs[_info]._id == FunctionId.Trim) || (s_funcs[_info]._id == FunctionId.Substring) || (s_funcs[_info]._id == FunctionId.Len)) { if ((typeof(string) != (argumentValues[i].GetType())) && (typeof(SqlString) != (argumentValues[i].GetType()))) { throw ExprException.ArgumentType(s_funcs[_info]._name, i + 1, s_funcs[_info]._parameters[i]); } } else { throw ExprException.ArgumentType(s_funcs[_info]._name, i + 1, s_funcs[_info]._parameters[i]); } } } } } return(EvalFunction(s_funcs[_info]._id, argumentValues, row, version)); }
internal override object Eval(DataRow row, DataRowVersion version) { object[] argumentValues = new object[this.argumentCount]; if (funcs[this.info].id == FunctionId.Convert) { if (this.argumentCount != 2) { throw ExprException.FunctionArgumentCount(this.name); } argumentValues[0] = this.arguments[0].Eval(row, version); argumentValues[1] = this.GetDataType(this.arguments[1]); } else if (funcs[this.info].id != FunctionId.Iif) { for (int i = 0; i < this.argumentCount; i++) { argumentValues[i] = this.arguments[i].Eval(row, version); if (funcs[this.info].IsValidateArguments) { if ((argumentValues[i] == DBNull.Value) || (typeof(object) == funcs[this.info].parameters[i])) { return(DBNull.Value); } if (argumentValues[i].GetType() != funcs[this.info].parameters[i]) { if ((funcs[this.info].parameters[i] == typeof(int)) && ExpressionNode.IsInteger(DataStorage.GetStorageType(argumentValues[i].GetType()))) { argumentValues[i] = Convert.ToInt32(argumentValues[i], base.FormatProvider); } else { if (((funcs[this.info].id != FunctionId.Trim) && (funcs[this.info].id != FunctionId.Substring)) && (funcs[this.info].id != FunctionId.Len)) { throw ExprException.ArgumentType(funcs[this.info].name, i + 1, funcs[this.info].parameters[i]); } if ((typeof(string) != argumentValues[i].GetType()) && (typeof(SqlString) != argumentValues[i].GetType())) { throw ExprException.ArgumentType(funcs[this.info].name, i + 1, funcs[this.info].parameters[i]); } } } } } } return(this.EvalFunction(funcs[this.info].id, argumentValues, row, version)); }
internal override object Eval(DataRow row, DataRowVersion version) { Debug.Assert(info < funcs.Length && info >= 0, "Invalid function info."); object[] argumentValues = new object[this.argumentCount]; Debug.Assert(this.argumentCount == funcs[info].argumentCount || funcs[info].IsVariantArgumentList, "Invalid argument argumentCount."); // special case of the Convert function if (funcs[info].id == FunctionId.Convert) { if (argumentCount != 2) { throw ExprException.FunctionArgumentCount(this.name); } argumentValues[0] = this.arguments[0].Eval(row, version); argumentValues[1] = GetDataType(this.arguments[1]); } else { for (int i = 0; i < this.argumentCount; i++) { argumentValues[i] = this.arguments[i].Eval(row, version); if (funcs[info].IsValidateArguments) { #if DEBUG if (CompModSwitches.FunctionNode.TraceVerbose) { Debug.WriteLine("Validate arguments for " + funcs[info].name); } #endif if ((argumentValues[i] == DBNull.Value) || (typeof(object) == funcs[info].parameters[i])) { #if DEBUG if (CompModSwitches.FunctionNode.TraceVerbose) { Debug.WriteLine("argument " + (i + 1).ToString() + " is empty"); } #endif // currently all supported functions with IsValidateArguments set to true // NOTE: for IIF and ISNULL IsValidateArguments set to false return(DBNull.Value); } if (argumentValues[i].GetType() != funcs[info].parameters[i]) { #if DEBUG if (CompModSwitches.FunctionNode.TraceVerbose) { Debug.WriteLine("change argumnet " + argumentValues[i].ToString() + " to " + funcs[info].parameters[i].ToString()); } #endif // We are allowing conversions in one very specific case: int, int64,...'nice' numeric to numeric.. if (funcs[info].parameters[i] == typeof(int) && ExpressionNode.IsInteger(argumentValues[i].GetType())) { argumentValues[i] = Convert.ToInt32(argumentValues[i]); } else { throw ExprException.ArgumentType(funcs[info].name, i + 1, funcs[info].parameters[i]); } } } } } return(EvalFunction(funcs[info].id, argumentValues, row, version)); }