mcs/class/System.Data.Linq/src/DbLinq/Data/Linq/Sugar/ExpressionMutator/Implementation/MemberInitExpressionMutator.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.Collections.Generic;\r
  28 using System.Linq;\r
  29 using System.Linq.Expressions;\r
  30 \r
  31 using DbLinq.Data.Linq.Sugar.Expressions;\r
  32 \r
  33 namespace DbLinq.Data.Linq.Sugar.ExpressionMutator.Implementation\r
  34 {\r
  35     internal class MemberInitExpressionMutator : IMutableExpression\r
  36     {\r
  37         protected MemberInitExpression MemberInitExpression { get; private set; }\r
  38 \r
  39         public Expression Mutate(IList<Expression> operands)\r
  40         {\r
  41             var bindings = new List<MemberBinding>();\r
  42             int operandIndex = MemberInitExpression.NewExpression.Arguments.Count();\r
  43             NewExpression newNewExpression;\r
  44             if (MemberInitExpression.NewExpression.Constructor != null)\r
  45             {\r
  46                 newNewExpression = Expression.New(MemberInitExpression.NewExpression.Constructor,\r
  47                                                   operands.Take(operandIndex));\r
  48             }\r
  49             else\r
  50             {\r
  51                 newNewExpression = Expression.New(MemberInitExpression.NewExpression.Type);\r
  52             }\r
  53             foreach (var memberBinding in MemberInitExpression.Bindings)\r
  54             {\r
  55                 var memberBindingMutator = MemberBindingMutatorFactory.GetMutator(memberBinding);\r
  56                 int operandsCount = memberBindingMutator.Operands.Count();\r
  57                 var subOperands = operands.Skip(operandIndex).Take(operandsCount).ToList();\r
  58                 bindings.Add(memberBindingMutator.Mutate(subOperands));\r
  59                 operandIndex += operandsCount;\r
  60             }\r
  61             return Expression.MemberInit(newNewExpression, bindings);\r
  62         }\r
  63 \r
  64         public IEnumerable<Expression> Operands\r
  65         {\r
  66             get\r
  67             {\r
  68                 foreach (var newExpressionArgument in MemberInitExpression.NewExpression.Arguments)\r
  69                     yield return newExpressionArgument;\r
  70                 foreach (var memberBinding in MemberInitExpression.Bindings)\r
  71                 {\r
  72                     foreach (var expression in MemberBindingMutatorFactory.GetMutator(memberBinding).Operands)\r
  73                         yield return expression;\r
  74                 }\r
  75             }\r
  76         }\r
  77 \r
  78         public MemberInitExpressionMutator(MemberInitExpression expression)\r
  79         {\r
  80             MemberInitExpression = expression;\r
  81         }\r
  82     }\r
  83 }