/// <summary>
/// Registers a new type to the <see cref="DependencyContainer"/>
/// </summary>
/// <typeparam name="TTypeToResolve">The type to resolve.</typeparam>
/// <typeparam name="TResolvedType">The resolved type to return.</typeparam>
/// <param name="options">The <see cref="LifeTimeOptions"/> for the type to register.</param>
public void Register <TTypeToResolve, TResolvedType>(LifeTimeOptions options)
{
if (this.container.ContainsKey(typeof(TTypeToResolve)))
{
throw new Exception($"Type {typeof(TTypeToResolve).FullName} already registered.");
}
ResolvedTypeWithLifeTimeOptions targetType = new ResolvedTypeWithLifeTimeOptions(typeof(TResolvedType), options);
this.container.Add(typeof(TTypeToResolve), targetType);
}
/// <summary>
/// Resolves the requested type from the <see cref="DependencyContainer"/>.
/// </summary>
/// <param name="typeToResolve">The <see cref="Type"/> to resolve.</param>
/// <returns>The resolved <see cref="Type"/>.</returns>
/// <exception cref="System.Exception">Type not registered.</exception>
/// <exception cref="System.Exception">Unable to resolve a parameter for this <see cref="Type"/>.</exception>
public object Resolve(Type typeToResolve, bool throwOnFailedParameterResolution = true)
{
if (!this.container.ContainsKey(typeToResolve))
{
throw new Exception($"Unable to resolve {typeToResolve.FullName}. Type is not registered.");
}
ResolvedTypeWithLifeTimeOptions resolvedType = this.container[typeToResolve];
if (resolvedType.LifeTimeOption == LifeTimeOptions.ContainerControlled && resolvedType.InstanceValue != null)
{
return(resolvedType.InstanceValue);
}
ConstructorInfo constructorInfo = resolvedType.ResolvedType.GetConstructors().First();
ParameterInfo[] paramsInfo = constructorInfo.GetParameters();
object[] resolvedParams = new object[paramsInfo.Length];
for (int x = 0; x < paramsInfo.Length; x++)
{
ParameterInfo param = paramsInfo[x];
Type t = param.ParameterType;
try
{
object res = this.Resolve(t);
resolvedParams[x] = res;
}
catch (Exception ex)
{
if (throwOnFailedParameterResolution)
{
throw new Exception($"Unable to resolve paramter type {t} for {typeToResolve}", ex);
}
resolvedParams[x] = null;
continue;
}
}
object retOjbect = constructorInfo.Invoke(resolvedParams);
if (resolvedType.LifeTimeOption == LifeTimeOptions.ContainerControlled)
{
resolvedType.InstanceValue = retOjbect;
}
return(retOjbect);
}
