@NotNull
private static Collection<CallableMemberDescriptor> extractMembersOverridableInBothWays(
@NotNull CallableMemberDescriptor overrider,
@NotNull Queue<CallableMemberDescriptor> extractFrom,
@NotNull DescriptorSink sink) {
Collection<CallableMemberDescriptor> overridable = new ArrayList<CallableMemberDescriptor>();
overridable.add(overrider);
for (Iterator<CallableMemberDescriptor> iterator = extractFrom.iterator();
iterator.hasNext(); ) {
CallableMemberDescriptor candidate = iterator.next();
if (overrider == candidate) {
iterator.remove();
continue;
}
OverrideCompatibilityInfo.Result result1 =
DEFAULT.isOverridableBy(candidate, overrider).getResult();
OverrideCompatibilityInfo.Result result2 =
DEFAULT.isOverridableBy(overrider, candidate).getResult();
if (result1 == OVERRIDABLE && result2 == OVERRIDABLE) {
overridable.add(candidate);
iterator.remove();
} else if (result1 == CONFLICT || result2 == CONFLICT) {
sink.conflict(overrider, candidate);
iterator.remove();
}
}
return overridable;
}
private static Collection<CallableMemberDescriptor> extractAndBindOverridesForMember(
@NotNull CallableMemberDescriptor fromCurrent,
@NotNull Collection<? extends CallableMemberDescriptor> descriptorsFromSuper,
@NotNull ClassDescriptor current,
@NotNull DescriptorSink sink) {
Collection<CallableMemberDescriptor> bound =
new ArrayList<CallableMemberDescriptor>(descriptorsFromSuper.size());
for (CallableMemberDescriptor fromSupertype : descriptorsFromSuper) {
OverrideCompatibilityInfo.Result result =
DEFAULT.isOverridableBy(fromSupertype, fromCurrent).getResult();
boolean isVisible =
Visibilities.isVisible(ReceiverValue.IRRELEVANT_RECEIVER, fromSupertype, current);
switch (result) {
case OVERRIDABLE:
if (isVisible) {
fromCurrent.addOverriddenDescriptor(fromSupertype);
}
bound.add(fromSupertype);
break;
case CONFLICT:
if (isVisible) {
sink.conflict(fromSupertype, fromCurrent);
}
bound.add(fromSupertype);
break;
case INCOMPATIBLE:
break;
}
}
return bound;
}
/**
* @param <H> is something that handles CallableDescriptor inside
* @return
*/
@NotNull
public static <H> Collection<H> extractMembersOverridableInBothWays(
@NotNull H overrider,
@NotNull @Mutable Collection<H> extractFrom,
@NotNull Function1<H, CallableDescriptor> descriptorByHandle,
@NotNull Function1<H, Unit> onConflict) {
Collection<H> overridable = new ArrayList<H>();
overridable.add(overrider);
CallableDescriptor overriderDescriptor = descriptorByHandle.invoke(overrider);
for (Iterator<H> iterator = extractFrom.iterator(); iterator.hasNext(); ) {
H candidate = iterator.next();
CallableDescriptor candidateDescriptor = descriptorByHandle.invoke(candidate);
if (overrider == candidate) {
iterator.remove();
continue;
}
OverrideCompatibilityInfo.Result finalResult =
getBothWaysOverridability(overriderDescriptor, candidateDescriptor);
if (finalResult == OVERRIDABLE) {
overridable.add(candidate);
iterator.remove();
} else if (finalResult == CONFLICT) {
onConflict.invoke(candidate);
iterator.remove();
}
}
return overridable;
}
@NotNull
public static <H> H selectMostSpecificMember(
@NotNull Collection<H> overridables,
@NotNull Function1<H, CallableDescriptor> descriptorByHandle) {
assert !overridables.isEmpty() : "Should have at least one overridable descriptor";
if (overridables.size() == 1) {
return CollectionsKt.first(overridables);
}
Collection<H> candidates = new ArrayList<H>(2);
List<CallableDescriptor> callableMemberDescriptors =
CollectionsKt.map(overridables, descriptorByHandle);
H transitivelyMostSpecific = CollectionsKt.first(overridables);
CallableDescriptor transitivelyMostSpecificDescriptor =
descriptorByHandle.invoke(transitivelyMostSpecific);
for (H overridable : overridables) {
CallableDescriptor descriptor = descriptorByHandle.invoke(overridable);
if (isMoreSpecificThenAllOf(descriptor, callableMemberDescriptors)) {
candidates.add(overridable);
}
if (isMoreSpecific(descriptor, transitivelyMostSpecificDescriptor)
&& !isMoreSpecific(transitivelyMostSpecificDescriptor, descriptor)) {
transitivelyMostSpecific = overridable;
}
}
if (candidates.isEmpty()) {
return transitivelyMostSpecific;
} else if (candidates.size() == 1) {
return CollectionsKt.first(candidates);
}
H firstNonFlexible = null;
for (H candidate : candidates) {
//noinspection ConstantConditions
if (!FlexibleTypesKt.isFlexible(descriptorByHandle.invoke(candidate).getReturnType())) {
firstNonFlexible = candidate;
break;
}
}
if (firstNonFlexible != null) {
return firstNonFlexible;
}
return CollectionsKt.first(candidates);
}
private static Collection<CallableMemberDescriptor> extractAndBindOverridesForMember(
@NotNull CallableMemberDescriptor fromCurrent,
@NotNull Collection<? extends CallableMemberDescriptor> descriptorsFromSuper,
@NotNull ClassDescriptor current,
@NotNull OverridingStrategy strategy) {
Collection<CallableMemberDescriptor> bound =
new ArrayList<CallableMemberDescriptor>(descriptorsFromSuper.size());
Collection<CallableMemberDescriptor> overridden = SmartSet.create();
for (CallableMemberDescriptor fromSupertype : descriptorsFromSuper) {
OverrideCompatibilityInfo.Result result =
DEFAULT.isOverridableBy(fromSupertype, fromCurrent, current).getResult();
boolean isVisibleForOverride = isVisibleForOverride(fromCurrent, fromSupertype);
switch (result) {
case OVERRIDABLE:
if (isVisibleForOverride) {
overridden.add(fromSupertype);
}
bound.add(fromSupertype);
break;
case CONFLICT:
if (isVisibleForOverride) {
strategy.overrideConflict(fromSupertype, fromCurrent);
}
bound.add(fromSupertype);
break;
case INCOMPATIBLE:
break;
}
}
strategy.setOverriddenDescriptors(fromCurrent, overridden);
return bound;
}