internal static RuntimeType TryResolve(this ReflectionDomain reflectionDomain, MetadataReader reader, Handle typeDefRefOrSpec, TypeContext typeContext, ref Exception exception)
{
HandleType handleType = typeDefRefOrSpec.HandleType;
if (handleType == HandleType.TypeDefinition)
{
return(reflectionDomain.ResolveTypeDefinition(reader, typeDefRefOrSpec.ToTypeDefinitionHandle(reader)));
}
else if (handleType == HandleType.TypeReference)
{
return(reflectionDomain.TryResolveTypeReference(reader, typeDefRefOrSpec.ToTypeReferenceHandle(reader), ref exception));
}
else if (handleType == HandleType.TypeSpecification)
{
return(reflectionDomain.TryResolveTypeSignature(reader, typeDefRefOrSpec.ToTypeSpecificationHandle(reader), typeContext, ref exception));
}
else
{
throw new BadImageFormatException(); // Expected TypeRef, Def or Spec.
}
}
//
// Main routine to parse a metadata type specification signature.
//
private static RuntimeType TryResolveTypeSignature(this ReflectionDomain reflectionDomain, MetadataReader reader, TypeSpecificationHandle typeSpecHandle, TypeContext typeContext, ref Exception exception)
{
Handle typeHandle = typeSpecHandle.GetTypeSpecification(reader).Signature;
switch (typeHandle.HandleType)
{
case HandleType.ArraySignature:
{
ArraySignature sig = typeHandle.ToArraySignatureHandle(reader).GetArraySignature(reader);
int rank = sig.Rank;
if (rank <= 0)
{
throw new BadImageFormatException(); // Bad rank.
}
RuntimeType elementType = reflectionDomain.TryResolve(reader, sig.ElementType, typeContext, ref exception);
if (elementType == null)
{
return(null);
}
return(ReflectionCoreNonPortable.GetMultiDimArrayType(elementType, rank));
}
case HandleType.ByReferenceSignature:
{
ByReferenceSignature sig = typeHandle.ToByReferenceSignatureHandle(reader).GetByReferenceSignature(reader);
RuntimeType targetType = reflectionDomain.TryResolve(reader, sig.Type, typeContext, ref exception);
if (targetType == null)
{
return(null);
}
return(ReflectionCoreNonPortable.GetByRefType(targetType));
}
case HandleType.MethodTypeVariableSignature:
{
MethodTypeVariableSignature sig = typeHandle.ToMethodTypeVariableSignatureHandle(reader).GetMethodTypeVariableSignature(reader);
return(typeContext.GenericMethodArguments[sig.Number]);
}
case HandleType.PointerSignature:
{
PointerSignature sig = typeHandle.ToPointerSignatureHandle(reader).GetPointerSignature(reader);
RuntimeType targetType = reflectionDomain.TryResolve(reader, sig.Type, typeContext, ref exception);
if (targetType == null)
{
return(null);
}
return(ReflectionCoreNonPortable.GetPointerType(targetType));
}
case HandleType.SZArraySignature:
{
SZArraySignature sig = typeHandle.ToSZArraySignatureHandle(reader).GetSZArraySignature(reader);
RuntimeType elementType = reflectionDomain.TryResolve(reader, sig.ElementType, typeContext, ref exception);
if (elementType == null)
{
return(null);
}
return(ReflectionCoreNonPortable.GetArrayType(elementType));
}
case HandleType.TypeDefinition:
{
return(reflectionDomain.ResolveTypeDefinition(reader, typeHandle.ToTypeDefinitionHandle(reader)));
}
case HandleType.TypeInstantiationSignature:
{
TypeInstantiationSignature sig = typeHandle.ToTypeInstantiationSignatureHandle(reader).GetTypeInstantiationSignature(reader);
RuntimeType genericTypeDefinition = reflectionDomain.TryResolve(reader, sig.GenericType, typeContext, ref exception);
if (genericTypeDefinition == null)
{
return(null);
}
LowLevelList <RuntimeType> genericTypeArguments = new LowLevelList <RuntimeType>();
foreach (Handle genericTypeArgumentHandle in sig.GenericTypeArguments)
{
RuntimeType genericTypeArgument = reflectionDomain.TryResolve(reader, genericTypeArgumentHandle, typeContext, ref exception);
if (genericTypeArgument == null)
{
return(null);
}
genericTypeArguments.Add(genericTypeArgument);
}
return(ReflectionCoreNonPortable.GetConstructedGenericType(genericTypeDefinition, genericTypeArguments.ToArray()));
}
case HandleType.TypeReference:
{
return(reflectionDomain.TryResolveTypeReference(reader, typeHandle.ToTypeReferenceHandle(reader), ref exception));
}
case HandleType.TypeVariableSignature:
{
TypeVariableSignature sig = typeHandle.ToTypeVariableSignatureHandle(reader).GetTypeVariableSignature(reader);
return(typeContext.GenericTypeArguments[sig.Number]);
}
default:
throw new NotSupportedException(); // Unexpected Type signature type.
}
}
//
// Main routine to resolve a typeReference.
//
private static RuntimeType TryResolveTypeReference(this ReflectionDomain reflectionDomain, MetadataReader reader, TypeReferenceHandle typeReferenceHandle, ref Exception exception)
{
{
ExecutionDomain executionDomain = reflectionDomain as ExecutionDomain;
if (executionDomain != null)
{
RuntimeTypeHandle resolvedRuntimeTypeHandle;
if (executionDomain.ExecutionEnvironment.TryGetNamedTypeForTypeReference(reader, typeReferenceHandle, out resolvedRuntimeTypeHandle))
{
return(ReflectionCoreNonPortable.GetTypeForRuntimeTypeHandle(resolvedRuntimeTypeHandle));
}
}
}
TypeReference typeReference = typeReferenceHandle.GetTypeReference(reader);
String name = typeReference.TypeName.GetString(reader);
Handle parent = typeReference.ParentNamespaceOrType;
HandleType parentType = parent.HandleType;
TypeInfo outerTypeInfo = null;
// Check if this is a reference to a nested type.
if (parentType == HandleType.TypeDefinition)
{
outerTypeInfo = RuntimeNamedTypeInfo.GetRuntimeNamedTypeInfo(reader, parent.ToTypeDefinitionHandle(reader));
}
else if (parentType == HandleType.TypeReference)
{
RuntimeType outerType = reflectionDomain.TryResolveTypeReference(reader, parent.ToTypeReferenceHandle(reader), ref exception);
if (outerType == null)
{
return(null);
}
outerTypeInfo = outerType.GetTypeInfo(); // Since we got to outerType via a metadata reference, we're assured GetTypeInfo() won't throw a MissingMetadataException.
}
if (outerTypeInfo != null)
{
// It was a nested type. We've already resolved the containing type recursively - just find the nested among its direct children.
TypeInfo resolvedTypeInfo = outerTypeInfo.GetDeclaredNestedType(name);
if (resolvedTypeInfo == null)
{
exception = reflectionDomain.CreateMissingMetadataException(outerTypeInfo, name);
return(null);
}
return((RuntimeType)(resolvedTypeInfo.AsType()));
}
// If we got here, the typeReference was to a non-nested type.
if (parentType == HandleType.NamespaceReference)
{
AssemblyQualifiedTypeName assemblyQualifiedTypeName = parent.ToNamespaceReferenceHandle(reader).ToAssemblyQualifiedTypeName(name, reader);
RuntimeType runtimeType;
exception = assemblyQualifiedTypeName.TryResolve(reflectionDomain, null, /*ignoreCase: */ false, out runtimeType);
if (exception != null)
{
return(null);
}
return(runtimeType);
}
throw new BadImageFormatException(); // Expected TypeReference parent to be typeRef, typeDef or namespaceRef.
}
