private ConstructorInfoCache FindConstructorRecursive(Type type)
{
ConstructorInfo constructorInfo = null;
ConstructorInfo[] allConstructors = type.GetConstructors(BindingFlags.CreateInstance | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
if (allConstructors.Length > 0)
{
// Choose the first...
constructorInfo = allConstructors[0];
// Iterate on the others for [Constructor]...
foreach (ConstructorInfo info in allConstructors)
{
if (info.GetCustomAttributes(typeof(ConstructorAttribute), true).Length <= 0)
{
continue;
}
constructorInfo = info;
break;
}
}
if (constructorInfo == null)
{
return(null);
}
var constructorInfoCache = new ConstructorInfoCache(constructorInfo, GetParameterInfoCache(constructorInfo.GetParameters()));
return(constructorInfoCache);
}
private object CreateInstance(Type type)
{
if (!_cachedDefaultConstructor.ContainsKey(type))
{
// Find first constructor without parameters...
ConstructorInfo[] constructors = type.GetConstructors(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
ConstructorInfo constructor = null;
foreach (ConstructorInfo info in constructors)
{
if (info.GetParameters().Length == 0)
{
constructor = info;
break;
}
}
if (constructor != null)
{
ConstructorInfoCache constructorInfoCache = new ConstructorInfoCache(constructor, GetParameterInfoCache(constructor.GetParameters()));
_cachedDefaultConstructor.Add(type, constructorInfoCache);
}
else
{
_cachedDefaultConstructor.Add(type, null);
}
}
if (_cachedDefaultConstructor[type] != null)
{
return(_cachedDefaultConstructor[type].ConstructorInfo.Invoke(null));
}
return(Activator.CreateInstance(type));
}
private object ExecuteConstructor(IContainer container, IInjectContext parentContext, ConstructorInfoCache constructor, Type type, params object[] addDependencies)
{
ParameterInfoCache[] parameters = constructor.Parameters;
if (parameters == null || parameters.Length == 0)
{
return(constructor.ConstructorInfo.Invoke(null));
}
// Resolve parameters
object[] paramObjects = new object[parameters.Length];
for (int i = 0; i < parameters.Length; i++)
{
ParameterInfoCache parameter = parameters[i];
ParameterInfo parameterInfo = parameter.ParameterInfo;
// Can we resolve this?
if (container.HasBindingFor(parameterInfo.ParameterType))
{
bool isCircularDependency = false;
foreach (Type resolvingType in _currentlyResolvingTypes)
{
if (parameterInfo.ParameterType.IsAssignableFrom(resolvingType))
{
isCircularDependency = true;
}
}
// Prevent recursive / circular dependency...
if (isCircularDependency)
{
LogHandler?.Invoke("Injector: Circular dependency detected in Type {0} parameter index: {1}", type, i);
paramObjects[i] = null;
}
else
{
InjectContext injectContext = new InjectContext(container, constructor.DeclaringType, parentContext);
object paramInstance = container.ResolveWithCategory(parameterInfo.ParameterType, parameters[i].InjectAttribute?.Category, injectContext);
paramObjects[i] = paramInstance;
}
}
else
{
bool hasAdditionalDependency = false;
// Check additional dependencies...
foreach (object dependency in addDependencies)
{
if (parameterInfo.ParameterType.IsInstanceOfType(dependency))
{
hasAdditionalDependency = true;
paramObjects[i] = dependency;
break;
}
}
if (!hasAdditionalDependency)
{
LogHandler?.Invoke("Injector: {0} - Type is not bound in the container, assigning as null {1}, parameter index: {2}", type, parameterInfo.ParameterType, i);
paramObjects[i] = null;
}
}
}
// Invoke constructor...
object instance = constructor.ConstructorInfo.Invoke(paramObjects);
return(instance);
}
