├── README.md ├── LinqExpander ├── ExpandQueryableAttribute.cs ├── LinqExpander.nuspec ├── ReplaceWithExpressionAttribute.cs ├── AsExpandableExtension.cs ├── ExpandableQuery.cs ├── Properties │ └── AssemblyInfo.cs ├── ExpandableQueryProvider.cs ├── ExpandableVisitor.cs └── LinqExpander.csproj ├── LinqExpander.sln ├── LICENSE └── .gitignore /README.md: -------------------------------------------------------------------------------- 1 | # LinqExpander 2 | A way of expanding extension methods in your LINQ expressions so that it can be interperated by a third party who doesn't understand your extensions. 3 | 4 | 5 | [![Build status](https://ci.appveyor.com/api/projects/status/xexd1ikps3cg0vem/branch/master?svg=true)](https://ci.appveyor.com/project/lukemcgregor/linqexpander/branch/master) 6 | 7 | -------------------------------------------------------------------------------- /LinqExpander/ExpandQueryableAttribute.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | 3 | namespace LinqExpander 4 | { 5 | 6 | /// 7 | /// Used in conjunction with the .AsExpandable() extention on a queryable this will take the extension method 8 | /// tagged and evaluate the queryable as an expression, appending it to the actual query. 9 | /// 10 | public class ExpandQueryableAttribute : Attribute { } 11 | } 12 | -------------------------------------------------------------------------------- /LinqExpander/LinqExpander.nuspec: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | $id$ 5 | $version$ 6 | Luke McGregor 7 | A way of expanding extension methods in your LINQ expressions so that it can be interperated by a third party who doesn't understand your extensions 8 | https://github.com/lukemcgregor/LinqExpander 9 | https://raw.githubusercontent.com/lukemcgregor/LinqExpander/master/LICENSE 10 | 11 | -------------------------------------------------------------------------------- /LinqExpander/ReplaceWithExpressionAttribute.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | 3 | namespace LinqExpander 4 | { 5 | /// 6 | /// Used in conjunction with the .AsExpandable() extention, this will replace the extension method tagged 7 | /// with an expression defined by the linked Method. 8 | /// Usage: [ReplaceInExpressionTree(MethodName = nameof(YourExpression))] 9 | /// 10 | public class ReplaceWithExpressionAttribute : Attribute 11 | { 12 | /// 13 | /// the name of the method returning an expression which you want to replace this extension with. 14 | /// 15 | public string MethodName { get; set; } 16 | } 17 | } 18 | -------------------------------------------------------------------------------- /LinqExpander.sln: -------------------------------------------------------------------------------- 1 | 2 | Microsoft Visual Studio Solution File, Format Version 12.00 3 | # Visual Studio 14 4 | VisualStudioVersion = 14.0.25420.1 5 | MinimumVisualStudioVersion = 10.0.40219.1 6 | Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "LinqExpander", "LinqExpander\LinqExpander.csproj", "{629A0BE0-E5C5-4386-8DE9-39313503CE3F}" 7 | EndProject 8 | Global 9 | GlobalSection(SolutionConfigurationPlatforms) = preSolution 10 | Debug|Any CPU = Debug|Any CPU 11 | Release|Any CPU = Release|Any CPU 12 | EndGlobalSection 13 | GlobalSection(ProjectConfigurationPlatforms) = postSolution 14 | {629A0BE0-E5C5-4386-8DE9-39313503CE3F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU 15 | {629A0BE0-E5C5-4386-8DE9-39313503CE3F}.Debug|Any CPU.Build.0 = Debug|Any CPU 16 | {629A0BE0-E5C5-4386-8DE9-39313503CE3F}.Release|Any CPU.ActiveCfg = Release|Any CPU 17 | {629A0BE0-E5C5-4386-8DE9-39313503CE3F}.Release|Any CPU.Build.0 = Release|Any CPU 18 | EndGlobalSection 19 | GlobalSection(SolutionProperties) = preSolution 20 | HideSolutionNode = FALSE 21 | EndGlobalSection 22 | EndGlobal 23 | -------------------------------------------------------------------------------- /LinqExpander/AsExpandableExtension.cs: -------------------------------------------------------------------------------- 1 | using System.Linq; 2 | 3 | namespace LinqExpander 4 | { 5 | /// 6 | /// Extensions for AsExpandable 7 | /// 8 | public static class AsExpandableExtension 9 | { 10 | /// 11 | /// Transforms your expression by replacing any [ExpandQuery] or [ReplaceWithExpression(MethodName = ...)] 12 | /// extension methods with the expressionised versions of those methods. This allows the extensions to be used 13 | /// by another visitor such as EntityFramework. Should be used at the start of a query. 14 | /// 15 | /// the type of the queryable 16 | /// The input queryable 17 | /// A queryable which has any of the tagged extension methods replaced. 18 | public static IQueryable AsExpandable(this IQueryable source) 19 | { 20 | 21 | if (source is ExpandableQuery) 22 | { 23 | return (ExpandableQuery)source; 24 | } 25 | 26 | return new ExtendableQueryProvider(source.Provider).CreateQuery(source.Expression); 27 | } 28 | } 29 | } 30 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2016 Luke McGregor 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /LinqExpander/ExpandableQuery.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using System.Linq.Expressions; 5 | 6 | namespace LinqExpander 7 | { 8 | internal class ExpandableQuery : IQueryable, IOrderedQueryable 9 | { 10 | ExtendableQueryProvider _provider; 11 | Expression _expression; 12 | 13 | public ExpandableQuery(ExtendableQueryProvider provider, Expression expression) 14 | { 15 | _provider = provider; 16 | _expression = expression; 17 | } 18 | 19 | public IEnumerator GetEnumerator() 20 | { 21 | return _provider.ExecuteQuery(_expression).GetEnumerator(); 22 | } 23 | 24 | System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() 25 | { 26 | return GetEnumerator(); 27 | } 28 | 29 | public Type ElementType 30 | { 31 | get 32 | { 33 | return typeof(T); 34 | } 35 | } 36 | 37 | public Expression Expression 38 | { 39 | get 40 | { 41 | return _expression; 42 | } 43 | } 44 | 45 | public IQueryProvider Provider 46 | { 47 | get 48 | { 49 | return _provider; 50 | } 51 | } 52 | } 53 | } 54 | -------------------------------------------------------------------------------- /LinqExpander/Properties/AssemblyInfo.cs: -------------------------------------------------------------------------------- 1 | using System.Reflection; 2 | using System.Runtime.CompilerServices; 3 | using System.Runtime.InteropServices; 4 | 5 | // General Information about an assembly is controlled through the following 6 | // set of attributes. Change these attribute values to modify the information 7 | // associated with an assembly. 8 | [assembly: AssemblyTitle("LinqExpander")] 9 | [assembly: AssemblyDescription("")] 10 | [assembly: AssemblyConfiguration("")] 11 | [assembly: AssemblyCompany("")] 12 | [assembly: AssemblyProduct("LinqExpander")] 13 | [assembly: AssemblyCopyright("Copyright © 2016")] 14 | [assembly: AssemblyTrademark("")] 15 | [assembly: AssemblyCulture("")] 16 | 17 | // Setting ComVisible to false makes the types in this assembly not visible 18 | // to COM components. If you need to access a type in this assembly from 19 | // COM, set the ComVisible attribute to true on that type. 20 | [assembly: ComVisible(false)] 21 | 22 | // The following GUID is for the ID of the typelib if this project is exposed to COM 23 | [assembly: Guid("629a0be0-e5c5-4386-8de9-39313503ce3f")] 24 | 25 | [assembly: AssemblyVersion(AssemblyMeta.Version)] 26 | [assembly: AssemblyFileVersion(AssemblyMeta.Version)] 27 | [assembly: AssemblyInformationalVersion(AssemblyMeta.Version)] 28 | 29 | internal static class AssemblyMeta 30 | { 31 | public const string Version = "1.0.1"; 32 | } 33 | -------------------------------------------------------------------------------- /LinqExpander/ExpandableQueryProvider.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using System.Linq.Expressions; 5 | 6 | namespace LinqExpander 7 | { 8 | internal class ExtendableQueryProvider : IQueryProvider 9 | { 10 | IQueryProvider _underlyingQueryProvider; 11 | 12 | private ExtendableQueryProvider() 13 | { 14 | } 15 | 16 | internal ExtendableQueryProvider(IQueryProvider underlyingQueryProvider) 17 | { 18 | _underlyingQueryProvider = underlyingQueryProvider; 19 | } 20 | 21 | public IQueryable CreateQuery(Expression expression) 22 | { 23 | return new ExpandableQuery(this, expression); 24 | } 25 | 26 | public IQueryable CreateQuery(Expression expression) 27 | { 28 | Type elementType = expression.Type.GetElementType(); 29 | try 30 | { 31 | return (IQueryable)Activator.CreateInstance(typeof(ExpandableQuery<>).MakeGenericType(elementType), new object[] { this, expression }); 32 | } 33 | catch (System.Reflection.TargetInvocationException tie) 34 | { 35 | throw tie.InnerException; 36 | } 37 | } 38 | 39 | internal IEnumerable ExecuteQuery(Expression expression) 40 | { 41 | return _underlyingQueryProvider.CreateQuery(Visit(expression)).AsEnumerable(); 42 | } 43 | 44 | public TResult Execute(Expression expression) 45 | { 46 | return _underlyingQueryProvider.Execute(Visit(expression)); 47 | } 48 | 49 | public object Execute(Expression expression) 50 | { 51 | return _underlyingQueryProvider.Execute(Visit(expression)); 52 | } 53 | 54 | private Expression Visit(Expression exp) 55 | { 56 | ExpandableVisitor vstr = new ExpandableVisitor(_underlyingQueryProvider); 57 | Expression visitedExp = vstr.Visit(exp); 58 | 59 | return visitedExp; 60 | } 61 | } 62 | } 63 | -------------------------------------------------------------------------------- /LinqExpander/ExpandableVisitor.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using System.Linq.Expressions; 5 | 6 | namespace LinqExpander 7 | { 8 | internal class ExpandableVisitor : ExpressionVisitor 9 | { 10 | private readonly IQueryProvider _provider; 11 | private readonly Dictionary _replacements = new Dictionary(); 12 | 13 | internal ExpandableVisitor(IQueryProvider provider) 14 | { 15 | _provider = provider; 16 | } 17 | 18 | protected override Expression VisitMethodCall(MethodCallExpression node) 19 | { 20 | bool expandNode = node.Method.GetCustomAttributes(typeof(ExpandQueryableAttribute), false).Any(); 21 | if (expandNode && node.Method.IsStatic) 22 | { 23 | object[] args = new object[node.Arguments.Count]; 24 | args[0] = _provider.CreateQuery(node.Arguments[0]); 25 | 26 | for (int i = 1; i < node.Arguments.Count; i++) 27 | { 28 | Expression arg = node.Arguments[i]; 29 | args[i] = (arg.NodeType == ExpressionType.Constant) ? ((ConstantExpression)arg).Value : arg; 30 | } 31 | return Visit(((IQueryable)node.Method.Invoke(null, args)).Expression); 32 | } 33 | var replaceNodeAttributes = node.Method.GetCustomAttributes(typeof(ReplaceWithExpressionAttribute), false).Cast(); 34 | if (replaceNodeAttributes.Any() && node.Method.IsStatic) 35 | { 36 | var replaceWith = node.Method.DeclaringType.GetMethod(replaceNodeAttributes.First().MethodName).Invoke(null, null); 37 | if (replaceWith is LambdaExpression) 38 | { 39 | RegisterReplacementParameters(node.Arguments.ToArray(), replaceWith as LambdaExpression); 40 | return Visit((replaceWith as LambdaExpression).Body); 41 | } 42 | } 43 | return base.VisitMethodCall(node); 44 | } 45 | protected override Expression VisitParameter(ParameterExpression node) 46 | { 47 | Expression replacement; 48 | if (_replacements.TryGetValue(node, out replacement)) 49 | return Visit(replacement); 50 | return base.VisitParameter(node); 51 | } 52 | private void RegisterReplacementParameters(Expression[] parameterValues, LambdaExpression expressionToVisit) 53 | { 54 | if (parameterValues.Length != expressionToVisit.Parameters.Count) 55 | throw new ArgumentException(string.Format("The parameter values count ({0}) does not match the expression parameter count ({1})", parameterValues.Length, expressionToVisit.Parameters.Count)); 56 | foreach (var x in expressionToVisit.Parameters.Select((p, idx) => new { Index = idx, Parameter = p })) 57 | { 58 | if (_replacements.ContainsKey(x.Parameter)) 59 | { 60 | throw new Exception("Parameter already registered, this shouldn't happen."); 61 | } 62 | _replacements.Add(x.Parameter, parameterValues[x.Index]); 63 | } 64 | } 65 | } 66 | 67 | } 68 | -------------------------------------------------------------------------------- /LinqExpander/LinqExpander.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | Debug 6 | AnyCPU 7 | {629A0BE0-E5C5-4386-8DE9-39313503CE3F} 8 | Library 9 | Properties 10 | LinqExpander 11 | LinqExpander 12 | v4.5 13 | 512 14 | 15 | 16 | true 17 | full 18 | false 19 | bin\Debug\ 20 | DEBUG;TRACE 21 | prompt 22 | 4 23 | bin\Debug\LinqExpander.xml 24 | 25 | 26 | pdbonly 27 | true 28 | bin\Release\ 29 | TRACE 30 | prompt 31 | 4 32 | bin\Release\LinqExpander.xml 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 64 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | ## Ignore Visual Studio temporary files, build results, and 2 | ## files generated by popular Visual Studio add-ons. 3 | 4 | # User-specific files 5 | *.suo 6 | *.user 7 | *.userosscache 8 | *.sln.docstates 9 | 10 | # User-specific files (MonoDevelop/Xamarin Studio) 11 | *.userprefs 12 | 13 | # Build results 14 | [Dd]ebug/ 15 | [Dd]ebugPublic/ 16 | [Rr]elease/ 17 | [Rr]eleases/ 18 | x64/ 19 | x86/ 20 | bld/ 21 | [Bb]in/ 22 | [Oo]bj/ 23 | [Ll]og/ 24 | 25 | # Visual Studio 2015 cache/options directory 26 | .vs/ 27 | # Uncomment if you have tasks that create the project's static files in wwwroot 28 | #wwwroot/ 29 | 30 | # MSTest test Results 31 | [Tt]est[Rr]esult*/ 32 | [Bb]uild[Ll]og.* 33 | 34 | # NUNIT 35 | *.VisualState.xml 36 | TestResult.xml 37 | 38 | # Build Results of an ATL Project 39 | [Dd]ebugPS/ 40 | [Rr]eleasePS/ 41 | dlldata.c 42 | 43 | # DNX 44 | project.lock.json 45 | artifacts/ 46 | 47 | *_i.c 48 | *_p.c 49 | *_i.h 50 | *.ilk 51 | *.meta 52 | *.obj 53 | *.pch 54 | *.pdb 55 | *.pgc 56 | *.pgd 57 | *.rsp 58 | *.sbr 59 | *.tlb 60 | *.tli 61 | *.tlh 62 | *.tmp 63 | *.tmp_proj 64 | *.log 65 | *.vspscc 66 | *.vssscc 67 | .builds 68 | *.pidb 69 | *.svclog 70 | *.scc 71 | 72 | # Chutzpah Test files 73 | _Chutzpah* 74 | 75 | # Visual C++ cache files 76 | ipch/ 77 | *.aps 78 | *.ncb 79 | *.opendb 80 | *.opensdf 81 | *.sdf 82 | *.cachefile 83 | *.VC.db 84 | *.VC.VC.opendb 85 | 86 | # Visual Studio profiler 87 | *.psess 88 | *.vsp 89 | *.vspx 90 | *.sap 91 | 92 | # TFS 2012 Local Workspace 93 | $tf/ 94 | 95 | # Guidance Automation Toolkit 96 | *.gpState 97 | 98 | # ReSharper is a .NET coding add-in 99 | _ReSharper*/ 100 | *.[Rr]e[Ss]harper 101 | *.DotSettings.user 102 | 103 | # JustCode is a .NET coding add-in 104 | .JustCode 105 | 106 | # TeamCity is a build add-in 107 | _TeamCity* 108 | 109 | # DotCover is a Code Coverage Tool 110 | *.dotCover 111 | 112 | # NCrunch 113 | _NCrunch_* 114 | .*crunch*.local.xml 115 | nCrunchTemp_* 116 | 117 | # MightyMoose 118 | *.mm.* 119 | AutoTest.Net/ 120 | 121 | # Web workbench (sass) 122 | .sass-cache/ 123 | 124 | # Installshield output folder 125 | [Ee]xpress/ 126 | 127 | # DocProject is a documentation generator add-in 128 | DocProject/buildhelp/ 129 | DocProject/Help/*.HxT 130 | DocProject/Help/*.HxC 131 | DocProject/Help/*.hhc 132 | DocProject/Help/*.hhk 133 | DocProject/Help/*.hhp 134 | DocProject/Help/Html2 135 | DocProject/Help/html 136 | 137 | # Click-Once directory 138 | publish/ 139 | 140 | # Publish Web Output 141 | *.[Pp]ublish.xml 142 | *.azurePubxml 143 | # TODO: Comment the next line if you want to checkin your web deploy settings 144 | # but database connection strings (with potential passwords) will be unencrypted 145 | *.pubxml 146 | *.publishproj 147 | 148 | # Microsoft Azure Web App publish settings. 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