public Indexer Close([NotNull] Type[] typeClosures)
{
if (typeClosures == null)
{
throw new ArgumentNullException("typeClosures");
}
// Check input arrays are valid.
if (typeClosures.Length != ExtendedType.GenericArguments.Count())
{
return(null);
}
// If we haven't got any type closures, we can return this indexer.
if (typeClosures.All(t => t == null))
{
return(this);
}
// Close type
ExtendedType et = ExtendedType.CloseType(typeClosures);
// Check closure succeeded.
if (et == null)
{
return(null);
}
// Create new search.
Debug.Assert(_indexParameters.Value != null);
int pCount = _indexParameters.Value.Length;
TypeSearch[] searchTypes = new TypeSearch[pCount + 1];
Type[] typeGenericArguments = et.GenericArguments.Select(g => g.Type).ToArray();
// Search for closed
Type[] emptyTypes = Array <Type> .Empty;
for (int i = 0; i < pCount; i++)
{
Debug.Assert(_indexParameters.Value[i] != null);
Type pType = _indexParameters.Value[i].ParameterType;
searchTypes[i] = Reflection.ExpandParameterType(pType, emptyTypes, typeGenericArguments);
}
// Add return type
searchTypes[pCount] = Reflection.ExpandParameterType(
Info.PropertyType,
emptyTypes,
typeGenericArguments);
// Search for indexer on new type.
return(et.GetIndexer(searchTypes));
}
public void ExtendedType_CanGetConcreteMethods()
{
// Get the open type.
ExtendedType openType = ExtendedType.Get(typeof(ComplexOverloads <>));
Assert.IsTrue(openType.Type.ContainsGenericParameters);
// Close the type
ExtendedType closedType = openType.CloseType(typeof(int));
Assert.IsNotNull(closedType);
Assert.IsFalse(closedType.Type.ContainsGenericParameters);
Assert.AreSame(openType.Type, closedType.Type.GetGenericTypeDefinition());
// This time we have a concrete type.
Method method = closedType.GetMethod("A", typeof(int));
Assert.IsNotNull(method);
// This method has no generic arguments and the type is concrete.
Assert.IsFalse(method.Info.ContainsGenericParameters);
Method method2 = closedType.GetMethod("A", 1, typeof(string), TypeSearch.Void);
Assert.IsNotNull(method2);
// This method has generic arguments and so it does contain generic parameters even though type is concrete.
Assert.IsTrue(method2.Info.ContainsGenericParameters);
// We can use the CloseMethod overload to close the method.
Method method3 = method2.Close(typeof(int));
Assert.IsNotNull(method3);
// We haven't closed the extended type.
Assert.AreSame(method2.ExtendedType, method3.ExtendedType);
Assert.IsFalse(method3.ExtendedType.Type.ContainsGenericParameters);
Assert.IsFalse(method3.Info.ContainsGenericParameters);
// Finally we get the open type's open method.
Method method4 = openType.GetMethod("A", 1, typeof(string), TypeSearch.Void);
Assert.IsNotNull(method4);
Assert.IsTrue(method4.Info.ContainsGenericParameters);
}
public Method Close([NotNull] Type[] typeClosures, [NotNull] Type[] signatureClosures)
{
if (typeClosures == null)
{
throw new ArgumentNullException("typeClosures");
}
if (signatureClosures == null)
{
throw new ArgumentNullException("signatureClosures");
}
Debug.Assert(_genericArguments.Value != null);
// Check input arrays are valid.
if ((typeClosures.Length != ExtendedType.GenericArguments.Count()) ||
(signatureClosures.Length != _genericArguments.Value.Count()))
{
return(null);
}
// If we have any type closures then we need to close the type and look for the method on there.
if (typeClosures.Any(t => t != null))
{
// Close type
ExtendedType et = ExtendedType.CloseType(typeClosures);
// Check closure succeeded.
if (et == null)
{
return(null);
}
// Create new search.
Debug.Assert(_parameters.Value != null);
int pCount = _parameters.Value.Length;
TypeSearch[] searchTypes = new TypeSearch[pCount + 1];
Type[] typeGenericArguments = et.GenericArguments.Select(g => g.Type).ToArray();
// Search for closed
for (int i = 0; i < pCount; i++)
{
Debug.Assert(_parameters.Value[i] != null);
Type pType = _parameters.Value[i].ParameterType;
Debug.Assert(pType != null);
searchTypes[i] = Reflection.ExpandParameterType(pType, signatureClosures, typeGenericArguments);
}
// Add return type
Type rType = Info.ReturnType;
searchTypes[pCount] = Reflection.ExpandParameterType(rType, signatureClosures, typeGenericArguments);
// Search for method on new type.
return(et.GetMethod(Info.Name, signatureClosures.Length, searchTypes));
}
// Substitute missing types with concrete ones.
int closures = signatureClosures.Length;
Type[] gta = new Type[closures];
for (int i = 0; i < closures; i++)
{
gta[i] = signatureClosures[i] ?? _genericArguments.Value[i].Type;
}
// Create closed method, cache it and return.
// ReSharper disable once AssignNullToNotNullAttribute
string key = string.Join("|", gta.Select(t => ExtendedType.Get(t).Signature));
Debug.Assert(_closedMethods.Value != null);
return(_closedMethods.Value.GetOrAdd(
key,
k =>
{
try
{
return new Method(ExtendedType, Info.MakeGenericMethod(gta));
}
catch (ArgumentException)
{
return null;
}
}));
}
