/// <summary>
/// Allows the types and attributes of plugin export parameters
/// to be enumerated and simultaneously validated.
/// </summary>
/// <param name="typeVisitors">
/// A dictionary of handlers for the parameter types.
/// </param>
/// <param name="attributeVisitors">
/// A dictionary of handlers for the parameter attributes.
/// </param>
protected void VisitParameters(
IReadOnlyDictionary <Type, Action <int> > typeVisitors,
IReadOnlyDictionary <Type, Action <int, object> > attributeVisitors)
{
foreach (var param in Method.GetParameters()
.Select((param, index) =>
new
{
Index = index,
Type = param.ParameterType,
Attributes = param.GetCustomAttributes()
}))
{
var isValidAPIType = NvimTypesMap.IsValidType(param.Type);
var isValidPluginType =
typeVisitors.TryGetValue(param.Type, out var visitor);
if (!isValidAPIType && !isValidPluginType)
{
throw new Exception(
$"Plugin export has invalid parameter type \"{param.Type.Name}\"");
}
if (visitor != null
// If there is not a visitor for the specific type,
// try to use the "object" visitor as a default
|| typeVisitors.TryGetValue(typeof(object), out visitor))
{
visitor(param.Index);
}
foreach (var attribute in param.Attributes)
{
if (attributeVisitors.TryGetValue(attribute.GetType(),
out var attributeVisitor))
{
attributeVisitor(param.Index, attribute);
}
}
}
}
public void TestNvimTypeValidation(Type type, bool shouldBeValid)
{
Assert.AreEqual(shouldBeValid, NvimTypesMap.IsValidType(type));
}
