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Add experimental support of Mapster
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‎README.md‎

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# AutoMapper.ExtendedConverters
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AutoMapper.ExtendedConverters is a small set of useful AutoMapper custom Type Converters
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AutoMapper.ExtendedConverters is a small set of useful [AutoMapper](https://github.com/AutoMapper/AutoMapper) (and [Mapster](https://github.com/eswann/Mapster)) custom Type Converters
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__ListConverter__ and more general __CollectionConverter__ are usefull for updating data in existing collections.
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For example, we have list of entites from database and it's modified version from client.
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Then with `ListConverter` we can update all database entities from client objects with same `Id`.
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__CompiledConverter__ is more performant version of default AutoMapper converter for plain objects.
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It uses compiled Expressions behind the scenes. But it not supports custom conversion for specific properties.
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```cs
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using System.Diagnostics;
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using System.Linq;
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using AutoMapper;
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using AutoMapper.ExtendedConverters;
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}
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}
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```
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## Mapping collections other than `List<T>`
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```cs
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cfg.CreateMap<IEnumerable<Model>, ICollection<Entity>>()
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.UsingCollectionConverter((Model m) => m.Id, (Entity e) => e.Id);
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```
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## Using with [Mapster](https://github.com/eswann/Mapster)
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```cs
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using Mapster;
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using Mapster.CollectionChangeTracking;
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class Model
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{
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public int Id { get; set; }
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public string Text { get; set; }
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}
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class Entity
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{
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public int Id { get; set; }
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public string Text { get; set; }
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}
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class Program
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{
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static void Configure()
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{
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TypeAdapterConfig<List<Model>, List<Entity>>.NewConfig()
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.TrackListChanges(m => m.Id, e => e.Id);
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// for mapping collections other than lists
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TypeAdapterConfig<Model[], SortedSet<Entity>>.NewConfig()
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.TrackCollectionChanges((Model m) => m.Id, (Entity e) => e.Id);
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}
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static void Main()
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{
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// values from Server
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var dest = new List<Entity>
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{
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new Entity { Id = 1, Text = "a" },
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new Entity { Id = 2, Text = "b" },
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};
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// values from Client
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var src = new List<Model>
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{
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new Model { Id = 1, Text = "A" },
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new Model { Id = 3, Text = "C" },
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};
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List<Entity> res = TypeAdapter.Adapt(src, dest);
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// now res is equivalent to
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new List<Entity>
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{
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// Entity with Id == 1 is updated
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new Entity { Id = 1, Text = "A" },
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// Entity with Id == 2 is removed
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// ...
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// Entity with Id == 3 is added
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new Entity { Id = 3, Text = "C" },
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}
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}
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}
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```

‎src/AutoMapper.ExtendedConverters.sln‎

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio 14
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VisualStudioVersion = 14.0.24720.0
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VisualStudioVersion = 14.0.25420.1
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AutoMapper.ExtendedConverters", "AutoMapper.ExtendedConverters\AutoMapper.ExtendedConverters.csproj", "{8754F86B-0490-476B-97D3-1545F7938796}"
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AutoMapper.ExtendedConverters.Tests", "AutoMapper.ExtendedConverters.Tests\AutoMapper.ExtendedConverters.Tests.csproj", "{0A6F3FD1-2836-4739-9164-1342A3955044}"
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AutoMapper.ExtendedConverters.Benchmarks", "AutoMapper.ExtendedConverters.Benchmarks\AutoMapper.ExtendedConverters.Benchmarks.csproj", "{FCBD99EF-37BC-487F-B454-99C7A8286F6A}"
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Mapster.CollectionChangeTracking", "Mapster.CollectionChangeTracking\Mapster.CollectionChangeTracking.csproj", "{C65F5DA6-344B-4F67-9CFD-97FECB715014}"
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Mapster.CollectionChangeTracking.Tests", "Mapster.CollectionChangeTracking.Tests\Mapster.CollectionChangeTracking.Tests.csproj", "{23A00E22-A11E-4DA7-A3A2-0B0E26126D81}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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{FCBD99EF-37BC-487F-B454-99C7A8286F6A}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{FCBD99EF-37BC-487F-B454-99C7A8286F6A}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{FCBD99EF-37BC-487F-B454-99C7A8286F6A}.Release|Any CPU.Build.0 = Release|Any CPU
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{C65F5DA6-344B-4F67-9CFD-97FECB715014}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{C65F5DA6-344B-4F67-9CFD-97FECB715014}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{C65F5DA6-344B-4F67-9CFD-97FECB715014}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{C65F5DA6-344B-4F67-9CFD-97FECB715014}.Release|Any CPU.Build.0 = Release|Any CPU
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{23A00E22-A11E-4DA7-A3A2-0B0E26126D81}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{23A00E22-A11E-4DA7-A3A2-0B0E26126D81}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{23A00E22-A11E-4DA7-A3A2-0B0E26126D81}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{23A00E22-A11E-4DA7-A3A2-0B0E26126D81}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE

‎src/Mapster.CollectionChangeTracking.Tests/CollectionChangeTrackingTests.cs‎

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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 Microsoft.VisualStudio.TestTools.UnitTesting;
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namespace Mapster.CollectionChangeTracking.Tests
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{
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[TestClass]
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public class CollectionChangeTrackingTests
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{
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public class Model
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{
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public int Id { get; set; }
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public string Text { get; set; }
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}
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public class Entity : IComparable<Entity>
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{
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public int Id { get; set; }
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public string Text { get; set; }
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public int CompareTo(Entity other)
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{
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return Id.CompareTo(other.Id);
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}
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}
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[TestInitialize]
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public void Initialize()
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{
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TypeAdapterConfig<Model[], SortedSet<Entity>>.NewConfig()
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.TrackCollectionChanges((Model m) => m.Id, (Entity e) => e.Id);
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TypeAdapterConfig<IEnumerable<Model>, LinkedList<Entity>>.NewConfig()
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.TrackCollectionChanges((Model m) => m.Id, (Entity e) => e.Id);
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//TypeAdapterConfig<IEnumerable<Model>, ICollection<Entity>>.NewConfig()
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// .TrackCollectionChanges((Model m) => m.Id, (Entity e) => e.Id);
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}
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[TestMethod]
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public void ShouldMapNullSource_WithoutDestination()
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{
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SortedSet<Entity> res = TypeAdapter.Adapt<Model[], SortedSet<Entity>>(null);
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Assert.IsNull(res);
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}
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[TestMethod]
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public void ShouldMapNullSource_ToExistingDestination()
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{
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var dest = new SortedSet<Entity> {
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new Entity { Id = 1, Text = "a" },
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new Entity { Id = 2, Text = "b" },
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new Entity { Id = 3, Text = "c" },
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};
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SortedSet<Entity> res = TypeAdapter.Adapt<Model[], SortedSet<Entity>>(null, dest);
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Assert.IsNull(res);
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}
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[TestMethod]
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public void ShouldMapSource_WithoutDestination()
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{
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var src = new[] {
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new Model { Id = 1, Text = "A" },
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new Model { Id = 2, Text = "B" },
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new Model { Id = 3, Text = "C" },
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new Model { Id = 4, Text = "D" },
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};
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SortedSet<Entity> res = TypeAdapter.Adapt<Model[], SortedSet<Entity>>(src);
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Assert.IsNotNull(res);
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Assert.AreEqual(src.Length, res.Count);
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Assert.IsTrue(src.Select(m => m.Id).SequenceEqual(res.Select(e => e.Id)));
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Assert.IsTrue(src.Select(m => m.Text).SequenceEqual(res.Select(e => e.Text)));
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}
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[TestMethod]
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public void ShouldMapSource_ToExistingDestination()
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{
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var src = new[] {
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new Model { Id = 1, Text = "A" },
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new Model { Id = 2, Text = "B" },
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new Model { Id = 4, Text = "D" },
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new Model { Id = 5, Text = "E" },
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};
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var dest = new SortedSet<Entity> {
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new Entity { Id = 1, Text = "a" },
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new Entity { Id = 2, Text = "b" },
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new Entity { Id = 3, Text = "c" },
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};
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var destArray = new Entity[3];
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dest.CopyTo(destArray, 0);
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SortedSet<Entity> res = TypeAdapter.Adapt(src, dest);
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var resArray = new Entity[4];
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res.CopyTo(resArray, 0);
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Assert.IsNotNull(res);
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Assert.AreEqual(src.Length, res.Count);
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// should preserve objects with keys both in source and destination
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Assert.AreSame(destArray[0], resArray[0]);
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Assert.AreSame(destArray[1], resArray[1]);
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// should add objects with keys in source but not in destination
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Assert.IsNotNull(resArray[2]);
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Assert.IsNotNull(resArray[3]);
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// should remove objects with keys in destination but not in source
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Assert.AreNotSame(destArray[2], resArray[2]);
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Assert.AreNotSame(destArray[2], resArray[3]);
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// should map values of collection items
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Assert.IsTrue(src.OrderBy(m => m.Id).Select(m => m.Id).SequenceEqual(res.Select(e => e.Id)));
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Assert.IsTrue(src.OrderBy(m => m.Id).Select(m => m.Text).SequenceEqual(res.Select(e => e.Text)));
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}
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private static IEnumerable<Model> BuildSource()
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{
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yield return new Model { Id = 1, Text = "A" };
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yield return new Model { Id = 2, Text = "B" };
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yield return new Model { Id = 4, Text = "D" };
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yield return new Model { Id = 5, Text = "E" };
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}
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public class ModelWrapper
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{
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public IEnumerable<Model> Collection { get; set; }
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}
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public class EntityWrapper
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{
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public ICollection<Entity> Collection { get; set; }
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}
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[TestMethod]
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public void ShouldMapAnyIEnumerable_ToAnyICollection()
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{
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var dest = new LinkedList<Entity>(new[] {
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new Entity { Id = 1, Text = "a" },
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new Entity { Id = 2, Text = "b" },
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new Entity { Id = 3, Text = "c" },
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});
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var destArray = new Entity[3];
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dest.CopyTo(destArray, 0);
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var destWrapper = new EntityWrapper { Collection = dest };
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var srcWrapper = new ModelWrapper { Collection = BuildSource() };
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var res = TypeAdapter.Adapt(srcWrapper, destWrapper);
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var resArray = new Entity[4];
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res.Collection.CopyTo(resArray, 0);
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// should preserve collection type
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Assert.AreEqual(dest.GetType(), res.Collection.GetType());
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// should preserve objects with keys both in source and destination
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Assert.AreSame(destArray[0], resArray[0]);
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Assert.AreSame(destArray[1], resArray[1]);
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// should add objects with keys in source but not in destination
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Assert.IsNotNull(resArray[2]);
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Assert.IsNotNull(resArray[3]);
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// should remove objects with keys in destination but not in source
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Assert.AreNotSame(destArray[2], resArray[2]);
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Assert.AreNotSame(destArray[2], resArray[3]);
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// should map values of collection items
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Assert.IsTrue(BuildSource().Select(m => m.Id).SequenceEqual(res.Collection.Select(e => e.Id)));
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Assert.IsTrue(BuildSource().Select(m => m.Text).SequenceEqual(res.Collection.Select(e => e.Text)));
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}
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}
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}

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