78 lines
4.1 KiB
C#
78 lines
4.1 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Linq.Expressions;
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using System.Text;
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namespace SqlSugar
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{
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public class BinaryExpressionResolve : BaseResolve
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{
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public BinaryExpressionResolve(ExpressionParameter parameter) : base(parameter)
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{
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var expression = this.Expression as BinaryExpression;
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var operatorValue = parameter.OperatorValue = ExpressionTool.GetOperator(expression.NodeType);
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var isEqual = expression.NodeType == ExpressionType.Equal;
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var isComparisonOperator = ExpressionTool.IsComparisonOperator(expression);
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base.ExactExpression = expression;
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var leftExpression = expression.Left;
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var rightExpression = expression.Right;
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var leftIsBinary = leftExpression is BinaryExpression;
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var rightBinary = rightExpression is BinaryExpression;
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var lbrs = leftIsBinary && !rightBinary;
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var lsrb = !leftIsBinary && rightBinary;
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var lbrb = rightBinary && leftIsBinary;
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var lsbs = !leftIsBinary && !rightBinary;
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var isAppend = !base.Context.Result.Contains(ExpressionConst.FormatSymbol);
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if (isAppend)
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{
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base.Context.Result.Append(ExpressionConst.LeftParenthesis);
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base.Context.Result.Append(ExpressionConst.FormatSymbol);
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}
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else
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{
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base.Context.Result.Replace(ExpressionConst.FormatSymbol, ExpressionConst.LeftParenthesis + ExpressionConst.FormatSymbol);
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}
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if (leftExpression is UnaryExpression && (leftExpression as UnaryExpression).Operand is UnaryExpression&& (leftExpression as UnaryExpression).NodeType != ExpressionType.Not)
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{
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leftExpression = (leftExpression as UnaryExpression).Operand;
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}
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if (leftExpression is UnaryExpression && (leftExpression as UnaryExpression).Operand.Type == UtilConstants.BoolType && (leftExpression as UnaryExpression).NodeType != ExpressionType.Not&&rightExpression.Type==UtilConstants.BoolTypeNull)
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{
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leftExpression = (leftExpression as UnaryExpression).Operand;
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}
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if (rightExpression is UnaryExpression&& (rightExpression as UnaryExpression).Operand.Type==UtilConstants.BoolType&& (rightExpression as UnaryExpression).NodeType != ExpressionType.Not)
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{
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rightExpression = (rightExpression as UnaryExpression).Operand;
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}
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parameter.LeftExpression = leftExpression;
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parameter.RightExpression = rightExpression;
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base.Expression = leftExpression;
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base.IsLeft = true;
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base.Start();
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if (leftExpression is UnaryExpression && leftExpression.Type == UtilConstants.BoolType&&!this.Context.Result.Contains(ExpressionConst.ExpressionReplace))
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{
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this.Context.Result.AppendFormat(" {0} ", ExpressionTool.GetOperator(expression.NodeType));
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}
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base.IsLeft = false;
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base.Expression = rightExpression;
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base.Start();
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base.IsLeft = null;
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if (lsbs && parameter.ValueIsNull)
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{
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base.Context.Result.Replace(ExpressionConst.ExpressionReplace + parameter.Index, isEqual ? "IS" : "IS NOT");
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base.Context.Result.Replace(ExpressionConst.ExpressionReplace + (parameter.Index + 1), isEqual ? "IS" : "IS NOT");
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}
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else
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{
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base.Context.Result.Replace(ExpressionConst.ExpressionReplace + parameter.Index, operatorValue);
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base.Context.Result.Replace(ExpressionConst.ExpressionReplace + (parameter.Index + 1), operatorValue);
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}
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base.Context.Result.Append(ExpressionConst.RightParenthesis);
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if (parameter.BaseExpression is BinaryExpression && parameter.IsLeft == true)
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{
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base.Context.Result.Append(" " + ExpressionConst.ExpressionReplace + parameter.BaseParameter.Index + " ");
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}
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}
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}
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}
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