protected override object OnGetArgument(HandlerParameter parameter, PomonaContext context, object state)
{
if (parameter == this.resourceParameter)
{
return(context.Node.Value);
}
return(base.OnGetArgument(parameter, context, state));
}
protected override object OnGetArgument(HandlerParameter parameter, PomonaContext context, InvokeState state)
{
if (parameter == this.targetResourceParameter)
{
return(context.Node.Value);
}
if (parameter == this.formParameter)
{
return(state.Form);
}
return(base.OnGetArgument(parameter, context, state));
}
public HandlerMethodTakingExistingResource(HandlerMethod method, ResourceType resourceType)
: base(method)
{
if (resourceType == null)
{
throw new ArgumentNullException(nameof(resourceType));
}
this.resourceParameter =
method.Parameters.LastOrDefault(x => x.Type == resourceType) ??
method.Parameters.LastOrDefault(x => x.IsResource && x.Type.IsAssignableFrom(resourceType));
if (this.resourceParameter == null)
{
throw new ArgumentException("Method has no argument accepting resource type.", nameof(method));
}
}
protected override object OnGetArgument(HandlerParameter parameter, PomonaContext context, object state)
{
var node = context.Node;
var resourceResultType = node.Route.ResultItemType as ResourceType;
if (resourceResultType != null)
{
var primaryIdType = resourceResultType.PrimaryId.PropertyType;
if (parameter.Type == primaryIdType)
{
object parsedId;
if (!node.PathSegment.TryParse(primaryIdType, out parsedId))
{
throw new HandlerMethodInvocationException(context, this, "Unable to parse id from url segment");
}
return(parsedId);
}
}
return(base.OnGetArgument(parameter, context, state));
}
public HandlerMethodTakingFormInvoker(HandlerMethod method,
HandlerParameter formParameter,
HandlerParameter targetResourceParameter = null)
: base(method)
{
if (formParameter == null)
{
throw new ArgumentNullException(nameof(formParameter));
}
if (formParameter.Method != method)
{
throw new ArgumentException("Parameter provided does not belong to method.", nameof(formParameter));
}
if (targetResourceParameter != null && targetResourceParameter.Method != method)
{
throw new ArgumentException("Parameter provided does not belong to method.", nameof(targetResourceParameter));
}
this.formParameter = formParameter;
this.targetResourceParameter = targetResourceParameter;
}
protected virtual object OnGetArgument(HandlerParameter parameter, PomonaContext context, TInvokeState state)
{
if (parameter.IsResource)
{
var parentNode = context
.Node
.Ascendants()
.FirstOrDefault(x => x.ResultType == parameter.TypeSpec);
if (parentNode != null)
{
return(parentNode.Value);
}
}
if (parameter.Type == typeof(PomonaContext))
{
return(context);
}
Exception innerEx = null;
try
{
// Never get value of transformed type parameter from IOC container
if (!parameter.Type.IsValueType && !parameter.IsTransformedType)
{
return(context.Session.GetInstance(parameter.Type));
}
}
catch (Exception ex)
{
innerEx = ex;
}
throw new HandlerMethodInvocationException(context,
this,
$"Unable to invoke handler {Method.MethodInfo.ReflectedType}.{Method.Name}, don't know how to provide value for parameter {parameter.Name}",
innerEx);
}
