private async Task <object> CreateInstanceAsync(Type interfaceType, ComponentDescriptor componentDescriptor, Action <string> progressCallback, ComponentDescriptor[] resolveStack)
{
ComponentDescriptor[] ResolveStack = this.CheckPreventRecursion(resolveStack, componentDescriptor);
ComponentInstance ComponentInstance = this.instances[componentDescriptor];
Func <Func <Task <object> >, Task <object> > RunCreate = componentDescriptor.MustCreateOnUiThread ? this.Repository.RunOnUiThread : Task.Run;
object Instance = await RunCreate(async() => await ComponentInstance.CreateInstanceAsync(interfaceType, this, progressCallback, ResolveStack));
return(Instance);
}
private object CreateInstance(Type interfaceType, ComponentDescriptor componentDescriptor, Action <string> progressCallback, ComponentDescriptor[] resolveStack)
{
ComponentDescriptor[] ResolveStack = this.CheckPreventRecursion(resolveStack, componentDescriptor);
ComponentInstance ComponentInstance = this.instances[componentDescriptor];
if (componentDescriptor.MustCreateOnUiThread && this.Repository.IsUiThread() == false)
{
throw new ArgumentException(@"Attempting to synchronously create a compontent instance that needs to be created on the UI thread from a non-ui thread.\nEither marshal the creation to the UI Thread, or use the async creation method that implicitly marshals if needed");
}
object Instance = ComponentInstance.CreateInstance(interfaceType, this, progressCallback, ResolveStack);
return(Instance);
}
/// <summary>
/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
/// </summary>
/// <filterpriority>2</filterpriority>
public void Dispose()
{
this.CheckDisposed();
foreach (ComponentInstance ComponentInstance in this.ComponentInstances)
{
try
{
ComponentInstance.Dispose(this);
}
catch
{
//Ignore
}
}
this.disposed = true;
}
public ComponentInstance this[ComponentDescriptor componentDescriptor]
{
get
{
foreach (ComponentInstance ComponentInstance in this.innerList)
{
if (ComponentInstance.Descriptor == componentDescriptor)
{
return(ComponentInstance);
}
}
ComponentInstance NewComponentInstance = componentDescriptor.CreateComponentInstance();
this.innerList.Add(NewComponentInstance);
this.InvokeComponentInstanceAdded(NewComponentInstance);
return(NewComponentInstance);
}
}
/// <summary>
/// Creates the event args.
/// </summary>
/// <param name="componentInstance">componentDescriptor that is accessible via the
/// <see cref="ComponentInstance"/> property</param>
public ComponentInstanceEventArgs(ComponentInstance componentInstance)
{
this.ComponentInstance = componentInstance;
}
private object Create(Action <string> progressCallback, ConstructorInfo optimalConstructor, object[] constructorParameters)
{
DateTime Start = DateTime.Now;
Debug.WriteLine($"{new string(' ', ComponentInstance.debugIndent * 3)}Start instantiation of {this.Name}");
ComponentInstance.debugIndent++;
try
{
DateTime ParameterResolved = DateTime.Now;
progressCallback?.Invoke(this.Descriptor.Name);
object Component = optimalConstructor.Invoke(constructorParameters);
DateTime ComponentCreated = DateTime.Now;
ComponentInstance.debugIndent--;
Debug.WriteLine($"{new string(' ', ComponentInstance.debugIndent * 3)}Instantiation of {this.Name} took {ComponentInstance.Format(ComponentCreated - Start)} (params: {ComponentInstance.Format(ParameterResolved - Start)}, ctor: {ComponentInstance.Format(ComponentCreated - ParameterResolved)})");
return(Component);
}
catch (Exception Error)
{
ComponentInstance.debugIndent--;
Debug.WriteLine($"{new string(' ', ComponentInstance.debugIndent * 3)}Instantiation of {this.Name} failed with message: {Error.Message.Replace("\n", $"\n{new string(' ', ComponentInstance.debugIndent * 3)}")}");
throw;
}
}
/// <summary>
///
/// </summary>
private bool CanGetParametersFor(ConstructorInfo constructor, ComponentContainer componentContainer, out string diagnosisInformation)
{
foreach (ParameterInfo Parameter in constructor.GetParameters())
{
Type ParameterType = Parameter.ParameterType;
if (ComponentInstance.IsValidInterfaceReference(ParameterType))
{
//Simple interface reference
if (this.CheckInterfaceParameter(componentContainer, ParameterType, true, $"{ParameterType.Name} {Parameter.Name}", "a", out diagnosisInformation) == false)
{
return(false);
}
}
else if (ComponentInstance.IsValidInterfaceTaskReference(ParameterType))
{
//Task to Simple interface reference
if (this.CheckInterfaceParameter(componentContainer, ParameterType.GenericTypeArguments[0], true, $"{ParameterType.Name} {Parameter.Name}", "a", out diagnosisInformation) == false)
{
return(false);
}
}
else if (ComponentInstance.IsValidFuncToInterfaceReference(ParameterType))
{
//Func<> Interface reference
if (this.CheckInterfaceParameter(componentContainer, ParameterType.GenericTypeArguments[0], true, $"{ParameterType.Name} {Parameter.Name}", "Func<> returning a", out diagnosisInformation) == false)
{
return(false);
}
}
else if (ComponentInstance.IsValidInterfaceArrayReference(ParameterType))
{
//Array of interface
if (this.CheckInterfaceParameter(componentContainer, ParameterType.GetElementType(), false, $"{ParameterType.Name} {Parameter.Name}", "an array of a", out diagnosisInformation) == false)
{
return(false);
}
}
else if (ComponentInstance.IsValidInterfaceArrayTaskReference(ParameterType))
{
//Task to Array of interface
if (this.CheckInterfaceParameter(componentContainer, ParameterType.GenericTypeArguments[0].GetElementType(), false, $"{ParameterType.Name} {Parameter.Name}", "an array of a", out diagnosisInformation) == false)
{
return(false);
}
}
else if (ComponentInstance.IsValidFuncToInterfaceArrayReference(ParameterType))
{
//Func<> of Array of interface
if (this.CheckInterfaceParameter(componentContainer, ParameterType.GenericTypeArguments[0].GetElementType(), false, $"{ParameterType.Name} {Parameter.Name}", "a Func<> returning an array of a", out diagnosisInformation) == false)
{
return(false);
}
}
else if (ParameterType == typeof(ComponentRepository))
{
//Parameter is OK
}
else if (ParameterType == typeof(ComponentContainer))
{
//Parameter is OK
}
else if (this.Descriptor.ConfigType != null && ParameterType.IsAssignableFrom(this.Descriptor.ConfigType))
{
//Parameter is OK
}
else
{
diagnosisInformation = $"parameter '{ParameterType.Name} {Parameter.Name}' type not supported. Except component interfaces, arrays of component interfaces, Func<> returning component interfaces or arrays of them or Tasks returning the above, only ComponentRepository, ComponentContainer and the 'Config' Type using in component registration (if given) can be used.";
return(false);
}
}
diagnosisInformation = "OK";
return(true);
}
private IEnumerable <T> GetParametersFor <T>(ConstructorInfo constructor, ComponentContainer componentContainer, Action <string> progressCallback, ComponentDescriptor[] resolveStack,
Func <object, T> wrapResult,
Func <Type, string, T> createInstance,
Func <Type, string, T> createInstances
)
{
async Task <object> CreateInstanceArrayAsync(Type parameterType)
{
Array Instances = await componentContainer.InternalResolveInstancesAsArrayAsync(parameterType, progressCallback, resolveStack);
return(Instances);
}
List <T> Parameters = new List <T>();
foreach (ParameterInfo Parameter in constructor.GetParameters())
{
Type ParameterType = Parameter.ParameterType;
if (ComponentInstance.IsValidInterfaceReference(ParameterType))
{
T Component = createInstance(ParameterType, Parameter.Name);
Parameters.Add(Component);
}
else if (ComponentInstance.IsValidInterfaceTaskReference(ParameterType))
{
object Component = ComponentInstance.DoDynamicCastAsync(ParameterType, componentContainer.InternalResolveInstanceAsync(ParameterType.GenericTypeArguments[0], true, null, new ComponentDescriptor[0]));
Parameters.Add(wrapResult(Component));
}
else if (ComponentInstance.IsValidFuncToInterfaceReference(ParameterType))
{
LambdaExpression Lambda = Expression.Lambda(
ParameterType,
Expression.Convert(
((Expression <Func <object> >)(() => componentContainer.InternalResolveInstance(ParameterType.GenericTypeArguments[0], true, progressCallback, new ComponentDescriptor[0]))).Body,
ParameterType.GenericTypeArguments[0]));
Parameters.Add(wrapResult(Lambda.Compile()));
}
else if (ComponentInstance.IsValidInterfaceArrayReference(ParameterType))
{
Parameters.Add(createInstances(ParameterType, Parameter.Name));
}
else if (ComponentInstance.IsValidInterfaceArrayTaskReference(ParameterType))
{
object Component = ComponentInstance.DoDynamicCastAsync(ParameterType, CreateInstanceArrayAsync(ParameterType.GenericTypeArguments[0].GetElementType()));
Parameters.Add(wrapResult(Component));
}
else if (ComponentInstance.IsValidFuncToInterfaceArrayReference(ParameterType))
{
LambdaExpression Lambda = Expression.Lambda(
ParameterType,
Expression.Convert(
((Expression <Func <Array> >)(() => componentContainer.InternalResolveInstancesAsArray(ParameterType.GenericTypeArguments[0].GetElementType(), progressCallback, new ComponentDescriptor[0]))).Body,
ParameterType.GenericTypeArguments[0]));
Parameters.Add(wrapResult(Lambda.Compile()));
}
else if (ParameterType == typeof(ComponentRepository))
{
Parameters.Add(wrapResult(this.Descriptor.PrivateRepository ?? this.Descriptor.Repository));
}
else if (ParameterType == typeof(ComponentContainer))
{
Parameters.Add(wrapResult(componentContainer));
}
else if (ParameterType.IsAssignableFrom(this.Descriptor.ConfigType))
{
Parameters.Add(wrapResult(this.Descriptor.Config));
}
else
{
throw new InvalidOperationException("Internal error: tried to resolve constructor parameters even though the constructor wasn't adequate");
}
}
return(Parameters);
}
private void InvokeComponentInstanceAdded(ComponentInstance componentInstance)
{
this.ComponentInstanceAdded(this, new ComponentInstanceEventArgs(componentInstance));
}
