mcs/class/System.Data.Linq/src/DbLinq/Data/Linq/Sugar/ExpressionMutator/Implementation/BinaryExpressionMutator.cs

   1 #region MIT license\r
   2 // \r
   3 // MIT license\r
   4 //\r
   5 // Copyright (c) 2007-2008 Jiri Moudry, Pascal Craponne\r
   6 // \r
   7 // Permission is hereby granted, free of charge, to any person obtaining a copy\r
   8 // of this software and associated documentation files (the "Software"), to deal\r
   9 // in the Software without restriction, including without limitation the rights\r
  10 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\r
  11 // copies of the Software, and to permit persons to whom the Software is\r
  12 // furnished to do so, subject to the following conditions:\r
  13 // \r
  14 // The above copyright notice and this permission notice shall be included in\r
  15 // all copies or substantial portions of the Software.\r
  16 // \r
  17 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\r
  18 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\r
  19 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\r
  20 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\r
  21 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\r
  22 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\r
  23 // THE SOFTWARE.\r
  24 // \r
  25 #endregion\r
  26 \r
  27 using System;\r
  28 using System.Collections.Generic;\r
  29 using System.Linq;\r
  30 using System.Linq.Expressions;\r
  31 \r
  32 using DbLinq.Data.Linq.Sugar.Expressions;\r
  33 \r
  34 namespace DbLinq.Data.Linq.Sugar.ExpressionMutator.Implementation\r
  35 {\r
  36     internal class BinaryExpressionMutator : IMutableExpression\r
  37     {\r
  38         protected BinaryExpression BinaryExpression { get; private set; }\r
  39 \r
  40         public Expression Mutate(IList<Expression> operands)\r
  41         {\r
  42             switch (BinaryExpression.NodeType)\r
  43             {\r
  44                 case ExpressionType.Add:\r
  45                     if (BinaryExpression.Method != null)\r
  46                         return Expression.Add(operands[0], operands[1], BinaryExpression.Method);\r
  47                     return Expression.Add(operands[0], operands[1]);\r
  48 \r
  49                 case ExpressionType.AddChecked:\r
  50                     if (BinaryExpression.Method != null)\r
  51                         return Expression.AddChecked(operands[0], operands[1], BinaryExpression.Method);\r
  52                     return Expression.AddChecked(operands[0], operands[1]);\r
  53 \r
  54                 case ExpressionType.Divide:\r
  55                     if (BinaryExpression.Method != null)\r
  56                         return Expression.Divide(operands[0], operands[1], BinaryExpression.Method);\r
  57                     return Expression.Divide(operands[0], operands[1]);\r
  58 \r
  59                 case ExpressionType.Modulo:\r
  60                     if (BinaryExpression.Method != null)\r
  61                         return Expression.Modulo(operands[0], operands[1], BinaryExpression.Method);\r
  62                     return Expression.Modulo(operands[0], operands[1]);\r
  63 \r
  64                 case ExpressionType.Multiply:\r
  65                     if (BinaryExpression.Method != null)\r
  66                         return Expression.Multiply(operands[0], operands[1], BinaryExpression.Method);\r
  67                     return Expression.Multiply(operands[0], operands[1]);\r
  68 \r
  69                 case ExpressionType.MultiplyChecked:\r
  70                     if (BinaryExpression.Method != null)\r
  71                         return Expression.MultiplyChecked(operands[0], operands[1], BinaryExpression.Method);\r
  72                     return Expression.MultiplyChecked(operands[0], operands[1]);\r
  73 \r
  74                 case ExpressionType.Power:\r
  75                     if (BinaryExpression.Method != null)\r
  76                         return Expression.Power(operands[0], operands[1], BinaryExpression.Method);\r
  77                     return Expression.Power(operands[0], operands[1]);\r
  78 \r
  79                 case ExpressionType.Subtract:\r
  80                     if (BinaryExpression.Method != null)\r
  81                         return Expression.Subtract(operands[0], operands[1], BinaryExpression.Method);\r
  82                     return Expression.Subtract(operands[0], operands[1]);\r
  83 \r
  84                 case ExpressionType.SubtractChecked:\r
  85                     if (BinaryExpression.Method != null)\r
  86                         return Expression.SubtractChecked(operands[0], operands[1], BinaryExpression.Method);\r
  87                     return Expression.SubtractChecked(operands[0], operands[1]);\r
  88 \r
  89                 case ExpressionType.And:\r
  90                     if (BinaryExpression.Method != null)\r
  91                         return Expression.And(operands[0], operands[1], BinaryExpression.Method);\r
  92                     return Expression.And(operands[0], operands[1]);\r
  93 \r
  94                 case ExpressionType.Or:\r
  95                     if (BinaryExpression.Method != null)\r
  96                         return Expression.Or(operands[0], operands[1], BinaryExpression.Method);\r
  97                     return Expression.Or(operands[0], operands[1]);\r
  98 \r
  99                 case ExpressionType.ExclusiveOr:\r
 100                     if (BinaryExpression.Method != null)\r
 101                         return Expression.ExclusiveOr(operands[0], operands[1], BinaryExpression.Method);\r
 102                     return Expression.ExclusiveOr(operands[0], operands[1]);\r
 103 \r
 104 \r
 105                 case ExpressionType.LeftShift:\r
 106                     if (BinaryExpression.Method != null)\r
 107                         return Expression.LeftShift(operands[0], operands[1], BinaryExpression.Method);\r
 108                     return Expression.LeftShift(operands[0], operands[1]);\r
 109 \r
 110                 case ExpressionType.RightShift:\r
 111                     if (BinaryExpression.Method != null)\r
 112                         return Expression.RightShift(operands[0], operands[1], BinaryExpression.Method);\r
 113                     return Expression.RightShift(operands[0], operands[1]);\r
 114 \r
 115 \r
 116                 case ExpressionType.AndAlso:\r
 117                     if (BinaryExpression.Method != null)\r
 118                         return Expression.AndAlso(operands[0], operands[1], BinaryExpression.Method);\r
 119                     return Expression.AndAlso(operands[0], operands[1]);\r
 120 \r
 121                 case ExpressionType.OrElse:\r
 122                     if (BinaryExpression.Method != null)\r
 123                         return Expression.OrElse(operands[0], operands[1], BinaryExpression.Method);\r
 124                     return Expression.OrElse(operands[0], operands[1]);\r
 125 \r
 126                 case ExpressionType.Equal:\r
 127                     if (BinaryExpression.Method != null)\r
 128                         return Expression.Equal(operands[0], operands[1], BinaryExpression.IsLiftedToNull, BinaryExpression.Method);\r
 129                     return Expression.Equal(operands[0], operands[1]);\r
 130 \r
 131                 case ExpressionType.NotEqual:\r
 132                     if (BinaryExpression.Method != null)\r
 133                         return Expression.NotEqual(operands[0], operands[1], BinaryExpression.IsLiftedToNull, BinaryExpression.Method);\r
 134                     return Expression.NotEqual(operands[0], operands[1]);\r
 135 \r
 136                 case ExpressionType.GreaterThanOrEqual:\r
 137                     if (BinaryExpression.Method != null)\r
 138                         return Expression.GreaterThanOrEqual(operands[0], operands[1], BinaryExpression.IsLiftedToNull, BinaryExpression.Method);\r
 139                     return Expression.GreaterThanOrEqual(operands[0], operands[1]);\r
 140 \r
 141                 case ExpressionType.GreaterThan:\r
 142                     if (BinaryExpression.Method != null)\r
 143                         return Expression.GreaterThan(operands[0], operands[1], BinaryExpression.IsLiftedToNull, BinaryExpression.Method);\r
 144                     return Expression.GreaterThan(operands[0], operands[1]);\r
 145 \r
 146                 case ExpressionType.LessThan:\r
 147                     if (BinaryExpression.Method != null)\r
 148                         return Expression.LessThan(operands[0], operands[1], BinaryExpression.IsLiftedToNull, BinaryExpression.Method);\r
 149                     return Expression.LessThan(operands[0], operands[1]);\r
 150 \r
 151                 case ExpressionType.LessThanOrEqual:\r
 152                     if (BinaryExpression.Method != null)\r
 153                         return Expression.LessThanOrEqual(operands[0], operands[1], BinaryExpression.IsLiftedToNull, BinaryExpression.Method);\r
 154                     return Expression.LessThanOrEqual(operands[0], operands[1]);\r
 155 \r
 156 \r
 157                 case ExpressionType.Coalesce:\r
 158                     if (BinaryExpression.Conversion != null)\r
 159                         return Expression.Coalesce(operands[0], operands[1], BinaryExpression.Conversion);\r
 160                     return Expression.Coalesce(operands[0], operands[1]);\r
 161 \r
 162                 case ExpressionType.ArrayIndex:\r
 163                     return Expression.ArrayIndex(operands[0], operands.Skip(1));\r
 164             }\r
 165             throw new Exception();\r
 166         }\r
 167 \r
 168         public IEnumerable<Expression> Operands\r
 169         {\r
 170             get \r
 171             {\r
 172                 yield return BinaryExpression.Left;\r
 173                 yield return BinaryExpression.Right;\r
 174             }\r
 175         }\r
 176 \r
 177         public BinaryExpressionMutator(BinaryExpression expression)\r
 178         {\r
 179             BinaryExpression = expression;\r
 180         }\r
 181     }\r
 182 }