/// <summary>
/// Adds an instance of a dependency to the dependency collection.
/// </summary>
/// <typeparam name="TDep">Type of dependency to register.</typeparam>
/// <typeparam name="TImpl">Type of implementation to register.</typeparam>
/// <param name="instance">Instance to register.</param>
/// <returns>This <see cref="DependencyCollectionBuilder"/>.</returns>
public DependencyCollectionBuilder AddInstance <TDep, TImpl>(TImpl instance)
where TDep : class
where TImpl : class, TDep
{
if (instance == null)
{
throw new ArgumentNullException(nameof(instance), "Dependency cannot be null.");
}
var tdep = typeof(TDep);
var timpl = typeof(TImpl);
this.RegisteredTypes.Add(tdep);
if (tdep != timpl)
{
this.RegisteredTypes.Add(timpl);
}
var depinf = new DependencyInfo
{
DependencyType = tdep,
ImplementationType = timpl,
Instance = instance
};
this.RegisteredDependencies.Add(depinf);
return(this);
}
/// <summary>
/// Constructs and adds a dependency by type.
/// </summary>
/// <typeparam name="TDep">Type of dependency.</typeparam>
/// <typeparam name="TImpl">Type of implementation.</typeparam>
/// <returns>This <see cref="DependencyCollectionBuilder"/>.</returns>
public DependencyCollectionBuilder Add <TDep, TImpl>()
where TDep : class
where TImpl : class, TDep
{
var tdep = typeof(TDep);
var timpl = typeof(TImpl);
var ti = timpl.GetTypeInfo();
var cs = ti.DeclaredConstructors
.Where(xci => xci.IsPublic)
.ToArray();
if (cs.Length != 1)
{
throw new ArgumentException("Specified type has more than 1 constructor.", nameof(TImpl));
}
var cx = cs[0];
var ts = cx.GetParameters()
.Select(xpi => xpi.ParameterType)
.ToArray();
var deps = this.RegisteredDependencies.ToDictionary(xdi => xdi.ImplementationType, xdi => xdi.Instance);
var cdeps = new object[ts.Length];
for (var i = 0; i < ts.Length; i++)
{
cdeps[i] = this.GetDependency(ts[i]);
}
var instance = Activator.CreateInstance(timpl, cdeps);
this.RegisteredTypes.Add(tdep);
if (tdep != timpl)
{
this.RegisteredTypes.Add(timpl);
}
var depinf = new DependencyInfo
{
DependencyType = tdep,
ImplementationType = timpl,
Instance = instance
};
this.RegisteredDependencies.Add(depinf);
return(this);
}
