@Nullable
public static Visibility findMaxVisibility(
@NotNull Collection<? extends CallableMemberDescriptor> descriptors) {
if (descriptors.isEmpty()) {
return Visibilities.DEFAULT_VISIBILITY;
}
Visibility maxVisibility = null;
for (CallableMemberDescriptor descriptor : descriptors) {
Visibility visibility = descriptor.getVisibility();
assert visibility != Visibilities.INHERITED
: "Visibility should have been computed for " + descriptor;
if (maxVisibility == null) {
maxVisibility = visibility;
continue;
}
Integer compareResult = Visibilities.compare(visibility, maxVisibility);
if (compareResult == null) {
maxVisibility = null;
} else if (compareResult > 0) {
maxVisibility = visibility;
}
}
if (maxVisibility == null) {
return null;
}
for (CallableMemberDescriptor descriptor : descriptors) {
Integer compareResult = Visibilities.compare(maxVisibility, descriptor.getVisibility());
if (compareResult == null || compareResult < 0) {
return null;
}
}
return maxVisibility;
}
@Nullable
private static Visibility findMaxVisibility(
@NotNull Collection<? extends CallableMemberDescriptor> descriptors) {
if (descriptors.isEmpty()) {
return Visibilities.INTERNAL;
}
Visibility maxVisibility = null;
for (CallableMemberDescriptor descriptor : descriptors) {
Visibility visibility = descriptor.getVisibility();
assert visibility != Visibilities.INHERITED
: "Visibility should have been computed for " + descriptor;
if (maxVisibility == null) {
maxVisibility = visibility;
continue;
}
Integer compareResult = Visibilities.compare(visibility, maxVisibility);
if (compareResult == null) {
maxVisibility = null;
} else if (compareResult > 0) {
maxVisibility = visibility;
}
}
// TODO: IDEA seems to issue an incorrect warning here
//noinspection ConstantConditions
if (maxVisibility == null) {
return null;
}
for (CallableMemberDescriptor descriptor : descriptors) {
Integer compareResult = Visibilities.compare(maxVisibility, descriptor.getVisibility());
if (compareResult == null || compareResult < 0) {
return null;
}
}
return maxVisibility;
}
public static void resolveUnknownVisibilityForMember(
@NotNull CallableMemberDescriptor memberDescriptor,
@Nullable Function1<CallableMemberDescriptor, Unit> cannotInferVisibility) {
for (CallableMemberDescriptor descriptor : memberDescriptor.getOverriddenDescriptors()) {
if (descriptor.getVisibility() == Visibilities.INHERITED) {
resolveUnknownVisibilityForMember(descriptor, cannotInferVisibility);
}
}
if (memberDescriptor.getVisibility() != Visibilities.INHERITED) {
return;
}
Visibility maxVisibility = computeVisibilityToInherit(memberDescriptor);
Visibility visibilityToInherit;
if (maxVisibility == null) {
if (cannotInferVisibility != null) {
cannotInferVisibility.invoke(memberDescriptor);
}
visibilityToInherit = Visibilities.PUBLIC;
} else {
visibilityToInherit = maxVisibility;
}
if (memberDescriptor instanceof PropertyDescriptorImpl) {
((PropertyDescriptorImpl) memberDescriptor).setVisibility(visibilityToInherit);
for (PropertyAccessorDescriptor accessor :
((PropertyDescriptor) memberDescriptor).getAccessors()) {
// If we couldn't infer visibility for property, the diagnostic is already reported, no need
// to report it again on accessors
resolveUnknownVisibilityForMember(
accessor, maxVisibility == null ? null : cannotInferVisibility);
}
} else if (memberDescriptor instanceof FunctionDescriptorImpl) {
((FunctionDescriptorImpl) memberDescriptor).setVisibility(visibilityToInherit);
} else {
assert memberDescriptor instanceof PropertyAccessorDescriptorImpl;
((PropertyAccessorDescriptorImpl) memberDescriptor).setVisibility(visibilityToInherit);
}
}
private void checkDeclaredTypeInPublicMember(
JetNamedDeclaration member, CallableMemberDescriptor memberDescriptor) {
boolean hasDeferredType;
if (member instanceof JetProperty) {
hasDeferredType =
((JetProperty) member).getTypeReference() == null
&& DescriptorResolver.hasBody((JetProperty) member);
} else {
assert member instanceof JetFunction;
JetFunction function = (JetFunction) member;
hasDeferredType =
function.getTypeReference() == null && function.hasBody() && !function.hasBlockBody();
}
if ((memberDescriptor.getVisibility().isPublicAPI())
&& memberDescriptor.getOverriddenDescriptors().size() == 0
&& hasDeferredType) {
trace.report(PUBLIC_MEMBER_SHOULD_SPECIFY_TYPE.on(member));
}
}
@Nullable
private static Visibility computeVisibilityToInherit(
@NotNull CallableMemberDescriptor memberDescriptor) {
Collection<? extends CallableMemberDescriptor> overriddenDescriptors =
memberDescriptor.getOverriddenDescriptors();
Visibility maxVisibility = findMaxVisibility(overriddenDescriptors);
if (maxVisibility == null) {
return null;
}
if (memberDescriptor.getKind() == CallableMemberDescriptor.Kind.FAKE_OVERRIDE) {
for (CallableMemberDescriptor overridden : overriddenDescriptors) {
// An implementation (a non-abstract overridden member) of a fake override should have the
// maximum possible visibility
if (overridden.getModality() != Modality.ABSTRACT
&& !overridden.getVisibility().equals(maxVisibility)) {
return null;
}
}
return maxVisibility;
}
return maxVisibility.normalize();
}