public override MapResult Map <T>(ValueMapperContext context)
{
if (typeof(T) != typeof(int))
{
return(MapResult.Success(default(T)));
}
var result = context.Values.SelectMany(x => x.ToString().Split(','))
.Select(x => (T)(object)int.Parse(x.ToString()));
return(MapResult.Success(context.Type.IsArray
? result.ToArray()
: (context.Type.IsGenericListCastable
? result.ToList()
: (object)result.FirstOrDefault())));
}
public void Should_set_properties_faster_than_reflection()
{
var mapper = new TestValueMapper(_configuration);
var mapperContext = new ValueMapperContext(new ActionParameter(_actionMethod,
Properties[nameof(Model.Value)]), new object[] { "1,2,3" });
var method = typeof(TestValueMapper)
.GetMethods(BindingFlags.Public | BindingFlags.Instance)
.First(x => x.Name == nameof(TestValueMapper.Map) && x.IsGenericMethod)
.MakeGenericMethod(mapperContext.Type.Type);
var comparison = PerformanceComparison.InTicks(10000, 1000);
comparison.AddCase("Native", () => mapper.Map <int>(mapperContext));
var compiledCase = comparison.AddCase("Compiled expression", () => mapper.Map(mapperContext));
var reflectionCase = comparison.AddCase("Reflection", () => method.Invoke(mapper, new object[] { mapperContext }));
comparison.Run();
compiledCase.Average.ShouldBeLessThan(reflectionCase.Average);
}
public void Should_set_properties_faster_than_reflection()
{
var iterations = 10000;
var mapper = new TestValueMapper();
var mapperContext = new ValueMapperContext(null, null,
Properties[nameof(Model.Value)], new object[] { "1,2,3" });
var method = typeof(TestValueMapper)
.GetMethods(BindingFlags.Public | BindingFlags.Instance)
.First(x => x.Name == nameof(TestValueMapper.Map) && x.IsGenericMethod)
.MakeGenericMethod(mapperContext.Type.Type);
var nativeElapsed = new List <long>();
var reflectionElapsed = new List <long>();
var expressionElapsed = new List <long>();
Action run = () =>
{
expressionElapsed.Add(mapper.ElapsedTicks(x => x.Map(mapperContext)));
reflectionElapsed.Add(method.ElapsedTicks(x =>
{
x.Invoke(mapper, new object[] { mapperContext });
}));
nativeElapsed.Add(mapper.ElapsedTicks(x =>
{
x.Map <int>(mapperContext);
}));
};
100.Times(run); // Warmup
nativeElapsed.Clear();
reflectionElapsed.Clear();
expressionElapsed.Clear();
iterations.Times(run);
Console.WriteLine($"Native: {nativeElapsed.Average()}");
Console.WriteLine($"Compiled expression: {expressionElapsed.Average()}");
Console.WriteLine($"Reflection: {reflectionElapsed.Average()}");
}
public object Map(ValueMapperContext context)
{
MapCalled = true;
MapContext = context;
return(MapFunc(context));
}
public bool AppliesTo(ValueMapperContext context)
{
AppliesToCalled = true;
AppliesToContext = context;
return(AppliesToFunc?.Invoke(context) ?? true);
}
public override bool AppliesTo(ValueMapperContext context)
{
throw new NotImplementedException();
}