/// <summary>
/// Prepare the invoke parameters. Adds default values if a parameter is missing.
/// </summary>
/// <param name="originalParameters">Original parameters.</param>
/// <param name="executor">Handler executor.</param>
/// <returns>Handler parameters.</returns>
private object[] PrepareParameters(object[] originalParameters, HandlerExecutor executor)
{
if (!executor.MethodParameters.Any())
{
return(null);
}
var parameters = new object[executor.MethodParameters.Count()];
for (var i = 0; i < parameters.Length; i++)
{
ParameterInfo methodParameterInfo = executor.MethodParameters.ElementAt(i);
if (i < originalParameters.Length)
{
Type originalObjectType = originalParameters[i]?.GetType();
if (!methodParameterInfo.ParameterType.IsAssignableFrom(originalObjectType))
{
object transformedParameter = this.parameterTransformer.Transform(originalParameters[i], methodParameterInfo.ParameterType.GetTypeInfo());
parameters[i] = transformedParameter ?? executor.GetDefaultValueForParameter(i);
}
else
{
parameters[i] = originalParameters[i];
}
}
else
{
parameters[i] = executor.GetDefaultValueForParameter(i);
}
}
return(parameters);
}
/// <summary>
/// Creates a new <see cref="HandlerActionInvokerCacheEntry"/> instance.
/// </summary>
/// <param name="handlerType">Target handler type.</param>
/// <param name="handlerFactory">Handler factory creator function.</param>
/// <param name="handlerReleaser">Handler releaser action.</param>
/// <param name="handlerExecutor">Handler action executor.</param>
internal HandlerActionInvokerCacheEntry(Type handlerType, Func <Type, object> handlerFactory, Action <object> handlerReleaser, HandlerExecutor handlerExecutor)
{
this.HandlerType = handlerType;
this.HandlerFactory = handlerFactory;
this.HandlerReleaser = handlerReleaser;
this.HandlerExecutor = handlerExecutor;
}