private static Collection<ClassDescriptor> getClassOrObjectDescriptorsByFqName(
NamespaceDescriptor packageDescriptor, FqName path, boolean includeObjectDeclarations) {
if (path.isRoot()) {
return Collections.emptyList();
}
Collection<JetScope> scopes = Arrays.asList(packageDescriptor.getMemberScope());
List<Name> names = path.pathSegments();
if (names.size() > 1) {
for (Name subName : path.pathSegments().subList(0, names.size() - 1)) {
Collection<JetScope> tempScopes = Lists.newArrayList();
for (JetScope scope : scopes) {
ClassifierDescriptor classifier = scope.getClassifier(subName);
if (classifier instanceof ClassDescriptorBase) {
ClassDescriptorBase classDescriptor = (ClassDescriptorBase) classifier;
tempScopes.add(classDescriptor.getUnsubstitutedInnerClassesScope());
}
}
scopes = tempScopes;
}
}
Name shortName = path.shortName();
Collection<ClassDescriptor> resultClassifierDescriptors = Lists.newArrayList();
for (JetScope scope : scopes) {
ClassifierDescriptor classifier = scope.getClassifier(shortName);
if (classifier instanceof ClassDescriptor) {
resultClassifierDescriptors.add((ClassDescriptor) classifier);
}
if (includeObjectDeclarations) {
ClassDescriptor objectDescriptor = scope.getObjectDescriptor(shortName);
if (objectDescriptor != null) {
resultClassifierDescriptors.add(objectDescriptor);
}
}
}
return resultClassifierDescriptors;
}
@Nullable
public static ClassDescriptor getKotlinBuiltinClassDescriptor(@NotNull FqName qualifiedName) {
if (!qualifiedName.firstSegmentIs(KotlinBuiltIns.BUILT_INS_PACKAGE_NAME)) return null;
List<Name> segments = qualifiedName.pathSegments();
if (segments.size() < 2) return null;
JetScope scope = KotlinBuiltIns.getInstance().getBuiltInsPackageScope();
for (int i = 1, size = segments.size(); i < size; i++) {
ClassifierDescriptor classifier = scope.getClassifier(segments.get(i));
if (classifier == null) return null;
assert classifier instanceof ClassDescriptor
: "Unexpected classifier in built-ins: " + classifier;
scope = ((ClassDescriptor) classifier).getUnsubstitutedInnerClassesScope();
}
return (ClassDescriptor) scope.getContainingDeclaration();
}