Пример #1
0
        public BinaryExpressionResolve(ExpressionParameter parameter) : base(parameter)
        {
            var expression           = this.Expression as BinaryExpression;
            var operatorValue        = parameter.OperatorValue = ExpressionTool.GetOperator(expression.NodeType);
            var isEqual              = expression.NodeType == ExpressionType.Equal;
            var isComparisonOperator = ExpressionTool.IsComparisonOperator(expression);

            base.ExactExpression = expression;
            var leftExpression  = expression.Left;
            var rightExpression = expression.Right;
            var leftIsBinary    = leftExpression is BinaryExpression;
            var rightBinary     = rightExpression is BinaryExpression;
            var lbrs            = leftIsBinary && !rightBinary;
            var lsrb            = !leftIsBinary && rightBinary;
            var lbrb            = rightBinary && leftIsBinary;
            var lsbs            = !leftIsBinary && !rightBinary;
            var isAppend        = !base.Context.Result.Contains(ExpressionConst.FormatSymbol);

            if (isAppend)
            {
                base.Context.Result.Append(ExpressionConst.LeftParenthesis);
                base.Context.Result.Append(ExpressionConst.FormatSymbol);
            }
            else
            {
                base.Context.Result.Replace(ExpressionConst.FormatSymbol, ExpressionConst.LeftParenthesis + ExpressionConst.FormatSymbol);
            }
            if (leftExpression is UnaryExpression && (leftExpression as UnaryExpression).Operand is UnaryExpression && (leftExpression as UnaryExpression).NodeType == ExpressionType.Convert)
            {
                leftExpression = (leftExpression as UnaryExpression).Operand;
            }
            if (leftExpression is UnaryExpression && (leftExpression as UnaryExpression).Operand.Type == UtilConstants.BoolType && (leftExpression as UnaryExpression).NodeType == ExpressionType.Convert && rightExpression.Type == UtilConstants.BoolTypeNull)
            {
                leftExpression = (leftExpression as UnaryExpression).Operand;
            }
            if (rightExpression is UnaryExpression && (rightExpression as UnaryExpression).Operand.Type == UtilConstants.BoolType && (rightExpression as UnaryExpression).NodeType == ExpressionType.Convert)
            {
                rightExpression = (rightExpression as UnaryExpression).Operand;
            }
            parameter.LeftExpression  = leftExpression;
            parameter.RightExpression = rightExpression;
            base.Expression           = leftExpression;
            base.IsLeft = true;
            base.Start();
            if (leftExpression is UnaryExpression && leftExpression.Type == UtilConstants.BoolType && !this.Context.Result.Contains(ExpressionConst.ExpressionReplace))
            {
                this.Context.Result.AppendFormat(" {0} ", ExpressionTool.GetOperator(expression.NodeType));
            }
            base.IsLeft     = false;
            base.Expression = rightExpression;
            base.Start();
            base.IsLeft = null;
            if (lsbs && parameter.ValueIsNull)
            {
                base.Context.Result.Replace(ExpressionConst.ExpressionReplace + parameter.Index, isEqual ? "IS" : "IS NOT");
                base.Context.Result.Replace(ExpressionConst.ExpressionReplace + (parameter.Index + 1), isEqual ? "IS" : "IS NOT");
            }
            else
            {
                base.Context.Result.Replace(ExpressionConst.ExpressionReplace + parameter.Index, operatorValue);
                base.Context.Result.Replace(ExpressionConst.ExpressionReplace + (parameter.Index + 1), operatorValue);
            }
            base.Context.Result.Append(ExpressionConst.RightParenthesis);
            if (parameter.BaseExpression is BinaryExpression && parameter.IsLeft == true)
            {
                base.Context.Result.Append(" " + ExpressionConst.ExpressionReplace + parameter.BaseParameter.Index + " ");
            }
        }
Пример #2
0
        public UnaryExpressionResolve(ExpressionParameter parameter) : base(parameter)
        {
            var oldExpression = base.Expression;
            var expression    = base.Expression as UnaryExpression;
            var baseParameter = parameter.BaseParameter;

            switch (this.Context.ResolveType)
            {
            case ResolveExpressType.WhereSingle:
            case ResolveExpressType.WhereMultiple:
            case ResolveExpressType.FieldSingle:
            case ResolveExpressType.FieldMultiple:
            case ResolveExpressType.SelectSingle:
            case ResolveExpressType.SelectMultiple:
            case ResolveExpressType.ArraySingle:
            case ResolveExpressType.ArrayMultiple:
            case ResolveExpressType.Update:
                var nodeType = expression.NodeType;
                base.Expression = expression.Operand;
                var isMember     = expression.Operand is MemberExpression;
                var isConst      = expression.Operand is ConstantExpression;
                var offsetIsNull = (parameter.OppsiteExpression is ConstantExpression) &&
                                   (parameter.OppsiteExpression as ConstantExpression).Value == null &&
                                   ExpressionTool.IsComparisonOperator(expression.Operand);
                if (isMember && offsetIsNull)
                {
                    Append(parameter, nodeType);
                }
                else if (baseParameter.CurrentExpression is NewArrayExpression)
                {
                    Result(parameter, nodeType);
                }
                else if (baseParameter.OperatorValue == "=" && IsNotMember(oldExpression))
                {
                    AppendNotMember(parameter, nodeType);
                }
                else if (baseParameter.OperatorValue == "=" && IsNotParameter(oldExpression))
                {
                    AppendNotParameter(parameter, nodeType);
                }
                else if (base.Expression is BinaryExpression || parameter.BaseExpression is BinaryExpression || baseParameter.CommonTempData.ObjToString() == CommonTempDataType.Append.ToString())
                {
                    Append(parameter, nodeType);
                }
                else if (isMember)
                {
                    MemberLogic(parameter, baseParameter, nodeType);
                }
                else if (isConst)
                {
                    Result(parameter, nodeType);
                }
                else
                {
                    Append(parameter, nodeType);
                }
                break;

            default:
                break;
            }
        }