mcs/class/System.Data.Linq/src/DbLinq/Data/Linq/Sugar/ExpressionMutator/Implementation/MemberMemberBindingMutator.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 #if MONO_STRICT\r
  32 namespace System.Data.Linq.Sugar.ExpressionMutator.Implementation\r
  33 #else\r
  34 namespace DbLinq.Data.Linq.Sugar.ExpressionMutator.Implementation\r
  35 #endif\r
  36 {\r
  37     internal class MemberMemberBindingMutator : IMemberBindingMutator\r
  38     {\r
  39         protected MemberMemberBinding MemberMemberBinding { get; private set; }\r
  40 \r
  41         public IEnumerable<Expression> Operands\r
  42         {\r
  43             get\r
  44             {\r
  45                 // a MemberMemberBindings is recursive, so let's recurse\r
  46                 foreach (var memberBinding in MemberMemberBinding.Bindings)\r
  47                 {\r
  48                     foreach (Expression operand in MemberBindingMutatorFactory.GetMutator(memberBinding).Operands)\r
  49                         yield return operand;\r
  50                 }\r
  51             }\r
  52         }\r
  53 \r
  54         public MemberBinding Mutate(IList<Expression> operands)\r
  55         {\r
  56             var bindings = new List<MemberBinding>();\r
  57             int operandsIndex = 0;\r
  58             // same thing here. The difficulty is that we have to split out operands\r
  59             foreach (var memberBinding in MemberMemberBinding.Bindings)\r
  60             {\r
  61                 int operandsCount = MemberBindingMutatorFactory.GetMutator(memberBinding).Operands.Count();\r
  62                 var subOperands = operands.Skip(operandsIndex).Take(operandsCount).ToList();\r
  63                 bindings.Add(MemberBindingMutatorFactory.GetMutator(memberBinding).Mutate(subOperands));\r
  64                 operandsIndex += operandsCount;\r
  65             }\r
  66             return Expression.MemberBind(MemberMemberBinding.Member, bindings);\r
  67         }\r
  68 \r
  69         public MemberMemberBindingMutator(MemberMemberBinding memberMemberBinding)\r
  70         {\r
  71             MemberMemberBinding = memberMemberBinding;\r
  72         }\r
  73     }\r
  74 }