/// <summary>
/// Gets a <see cref="CodeTypeReference"/> for a CLR type.
/// </summary>
/// <param name="type">A CLR type.</param>
/// <param name="codeGenerator">A <see cref="CodeDomClientCodeGenerator"/>.</param>
/// <param name="referencingType">The referencing type.</param>
/// <param name="optimizeAttributeName">Indicates whether or not to optimize <see cref="Attribute"/> names by removing the "Attribute" suffix.</param>
/// <param name="forceUseFullyQualifiedName">Indicates whether or not to generate the type using the fully qualified name irrespective the global setting.</param>
/// <returns>A <see cref="CodeTypeReference"/> for a CLR type.</returns>
internal static CodeTypeReference GetTypeReference(Type type, CodeDomClientCodeGenerator codeGenerator, CodeTypeDeclaration referencingType, bool optimizeAttributeName, bool forceUseFullyQualifiedName)
{
string typeName = type.Name;
string typeNamespace = type.Namespace;
// Add an import statement to the referencing type if needed
CodeNamespace ns = codeGenerator.GetNamespace(referencingType);
CodeTypeReference codeTypeReference = null;
// Attribute? If so, we special case these and remove the 'Attribute' suffix if present.
if (optimizeAttributeName)
{
typeName = OptimizeAttributeName(type);
}
// Determine if we should generate this type with a full type name
bool useFullyQualifiedName = forceUseFullyQualifiedName || CodeGenUtilities._useFullTypeNames || RegisterTypeName(typeNamespace, typeName, ns.Name);
// Make sure we take into account root namespace in VB codegen.
typeNamespace = TranslateNamespace(type, codeGenerator);
// Conditionally add an import statement. Skip this step if we need to generate a full
// type name, if we're already in the target namespace, or if the type is in the global namespace.
if (!useFullyQualifiedName && !ns.Name.Equals(type.Namespace) && !string.IsNullOrEmpty(type.Namespace))
{
// If the namespace is already imported, the following line will be a no-op.
ns.Imports.Add(new CodeNamespaceImport(typeNamespace));
}
// If forced using Fully Qualified names, dont look up or store the code reference in the cache. That is because,
// we force the use of fully qualified names only in certain cases. Caching at this time will cause the fully qualified name
// to be used every time.
bool useCache = !forceUseFullyQualifiedName;
// See if we already have a reference for this type
Tuple <CodeNamespace, Type> tupleKey = new Tuple <CodeNamespace, Type>(ns, type);
if (!useCache || !CodeGenUtilities._codeTypeReferences.TryGetValue(tupleKey, out codeTypeReference))
{
if (useFullyQualifiedName && !string.IsNullOrEmpty(typeNamespace))
{
// While this splicing may seem awkward, we perform this task
// rather than rely on 'type.FullName' as we may have performed
// a VB root namespace translation task above.
typeName = typeNamespace + "." + typeName;
}
// If not, create a new type reference. Use the constructor for CodeTypeReference
// that takes a type's name rather than type to generate short names.
if (type.IsArray)
{
codeTypeReference = new CodeTypeReference(
CodeGenUtilities.GetTypeReference(type.GetElementType(), codeGenerator, referencingType, /* optimizeAttributeName */ false, forceUseFullyQualifiedName),
type.GetArrayRank());
}
else if (type.IsGenericType)
{
Type[] genericArguments = type.GetGenericArguments();
CodeTypeReference[] typeArguments = new CodeTypeReference[genericArguments.Length];
for (int i = 0; i < genericArguments.Length; i++)
{
typeArguments[i] = GetTypeReference(genericArguments[i], codeGenerator, referencingType);
}
codeTypeReference = new CodeTypeReference(typeName, typeArguments);
}
else
{
// Generate language-specific shorthands for core types by using CodeTypeReference constructor that takes a Type
if (type.IsPrimitive || type == typeof(void) || type == typeof(decimal) || type == typeof(string) || type == typeof(object))
{
codeTypeReference = new CodeTypeReference(type);
}
else
{
codeTypeReference = new CodeTypeReference(typeName);
}
}
// Keep track of the CLR type for identification purposes.
codeTypeReference.UserData["ClrType"] = type;
// Cache for later use.
if (useCache)
{
CodeGenUtilities._codeTypeReferences.Add(tupleKey, codeTypeReference);
}
}
return(codeTypeReference);
}
