private static Func <object[], object> CreateInstanceFactory(Projection projection)
{
if (projection.ctor == null)
{
return(a => a[0]);
}
var compiledCtorDelegate = ReflectionHelpers.GetCompiledDelegate(projection.ctor);
if (projection.initMembers == null)
{
return(arguments => compiledCtorDelegate(null, arguments));
}
if (projection.ctor.GetParameters().Length != 0)
{
throw new InvalidOperationException("assertion exception");
}
var memberAccessors = new MemberAccessor <object> [projection.initMembers.Length];
for (var i = 0; i < memberAccessors.Length; i++)
{
memberAccessors[i] = MemberAccessor <object> .Get(projection.initMembers[i]);
}
return(delegate(object[] arguments)
{
var result = compiledCtorDelegate(null, emptyObjectArray);
for (var i = 0; i < memberAccessors.Length; i++)
{
memberAccessors[i].Set(result, arguments[i]);
}
return result;
});
}
public void CanReadProp()
{
var accessor = new MemberAccessor(typeof(MemberAccessorTestClass), "NameProp");
var name = Guid.NewGuid().ToString();
var result = accessor.Get(new MemberAccessorTestClass()
{
NameProp = name
});
Assert.AreEqual(name, result);
}
private static T GetPropertyValue <T>(Type objType, string propertyName, object obj)
{
var key = objType.FullName + "_" + propertyName;
object accessor;
MemberAccessor <T> typedAccessor;
if (!accessors.TryGetValue(key, out accessor))
{
var property = objType.GetProperty(propertyName);
typedAccessor = property != null ? MemberAccessor <T> .Get(property) : null;
accessors.TryAdd(key, typedAccessor);
}
else
{
typedAccessor = (MemberAccessor <T>)accessor;
}
return(typedAccessor == null ? default(T) : typedAccessor.Get(obj));
}
public static void TestSpeed()
{
var model = new Cookie();
var property = nameof(Cookie.Comment);
var value = "1";
const int itterations = 30000000;
var accessor1 = MemberAccessor.Get(model.GetType());
var accessor2 = TypeAccessor.Create(model.GetType());
var timer = Stopwatch.StartNew();
for (var i = 0; i < itterations; i++)
{
accessor1[model, property] = value;
accessor2[model, property] = value;
}
timer.Stop();
Console.WriteLine($"Warmup {timer.ElapsedMilliseconds}ms");
var timer1 = Stopwatch.StartNew();
for (var i = 0; i < itterations; i++)
{
accessor1[model, property] = value;
var read = accessor1[model, property];
}
timer1.Stop();
Console.WriteLine($"PropertyAccessor {timer1.ElapsedMilliseconds}ms");
var timer2 = Stopwatch.StartNew();
for (var i = 0; i < itterations; i++)
{
accessor2[model, property] = value;
var read = accessor1[model, property];
}
timer2.Stop();
Console.WriteLine($"TypeAccessor {timer2.ElapsedMilliseconds}ms");
var timer4 = Stopwatch.StartNew();
for (var i = 0; i < itterations; i++)
{
accessor1[model, property] = value;
var read = accessor1[model, property];
}
timer4.Stop();
Console.WriteLine($"PropertyAccessor {timer4.ElapsedMilliseconds}ms");
var timer3 = Stopwatch.StartNew();
for (var i = 0; i < itterations; i++)
{
accessor2[model, property] = value;
var read = accessor1[model, property];
}
timer3.Stop();
Console.WriteLine($"TypeAccessor {timer3.ElapsedMilliseconds}ms");
var accessor1Index = accessor1[property];
var timer5 = Stopwatch.StartNew();
for (var i = 0; i < itterations; i++)
{
accessor1[model, accessor1Index] = value;
var read = accessor1[model, accessor1Index];
}
timer5.Stop();
Console.WriteLine($"PropertyAccessor Indexed {timer5.ElapsedMilliseconds}ms");
var timer6 = Stopwatch.StartNew();
for (var i = 0; i < itterations; i++)
{
accessor2[model, property] = value;
var read = accessor1[model, property];
}
timer6.Stop();
Console.WriteLine($"TypeAccessor {timer6.ElapsedMilliseconds}ms");
}
public void ComplexPropertyGet()
{
Assert.AreEqual("United States", countryNameAccessor.Get(person));
}
public void SimplePropertyGet()
{
Assert.AreEqual("John", forenameAccessor.Get(person));
}
public void SimpleFieldGet()
{
Assert.AreEqual("John Smith", nameFieldAccessor.Get(person));
}
