@NotNull
private Collection<PsiElement> getDeclarationsByDescriptor(
@NotNull DeclarationDescriptor declarationDescriptor) {
Collection<PsiElement> declarations;
if (declarationDescriptor instanceof PackageViewDescriptor) {
final PackageViewDescriptor aPackage = (PackageViewDescriptor) declarationDescriptor;
Collection<JetFile> files = trace.get(BindingContext.PACKAGE_TO_FILES, aPackage.getFqName());
if (files == null) {
return Collections
.emptyList(); // package can be defined out of Kotlin sources, e. g. in library or Java
// code
}
declarations =
Collections2.transform(
files,
new Function<JetFile, PsiElement>() {
@Override
public PsiElement apply(@Nullable JetFile file) {
assert file != null : "File is null for aPackage " + aPackage;
return file.getPackageDirective().getNameIdentifier();
}
});
} else {
declarations =
Collections.singletonList(
BindingContextUtils.descriptorToDeclaration(
trace.getBindingContext(), declarationDescriptor));
}
return declarations;
}
private void checkRedeclarationsInPackages(@NotNull TopDownAnalysisContext c) {
for (MutablePackageFragmentDescriptor packageFragment :
Sets.newHashSet(c.getPackageFragments().values())) {
PackageViewDescriptor packageView =
packageFragment.getContainingDeclaration().getPackage(packageFragment.getFqName());
JetScope packageViewScope = packageView.getMemberScope();
Multimap<Name, DeclarationDescriptor> simpleNameDescriptors =
packageFragment.getMemberScope().getDeclaredDescriptorsAccessibleBySimpleName();
for (Name name : simpleNameDescriptors.keySet()) {
// Keep only properties with no receiver
Collection<DeclarationDescriptor> descriptors =
Collections2.filter(
simpleNameDescriptors.get(name),
new Predicate<DeclarationDescriptor>() {
@Override
public boolean apply(@Nullable DeclarationDescriptor descriptor) {
if (descriptor instanceof PropertyDescriptor) {
PropertyDescriptor propertyDescriptor = (PropertyDescriptor) descriptor;
return propertyDescriptor.getReceiverParameter() == null;
}
return true;
}
});
ContainerUtil.addIfNotNull(descriptors, packageViewScope.getPackage(name));
if (descriptors.size() > 1) {
for (DeclarationDescriptor declarationDescriptor : descriptors) {
for (PsiElement declaration : getDeclarationsByDescriptor(declarationDescriptor)) {
assert declaration != null
: "Null declaration for descriptor: "
+ declarationDescriptor
+ " "
+ (declarationDescriptor != null
? DescriptorRenderer.FQ_NAMES_IN_TYPES.render(declarationDescriptor)
: "");
trace.report(
REDECLARATION.on(declaration, declarationDescriptor.getName().asString()));
}
}
}
}
}
}