@Nullable
private static Condition<PsiElement> findMethodUsages(
final PsiMethod psiMethod, final PsiElement[] allElementsToDelete, List<UsageInfo> usages) {
final Collection<PsiReference> references = ReferencesSearch.search(psiMethod).findAll();
if (psiMethod.isConstructor()) {
return findConstructorUsages(psiMethod, references, usages, allElementsToDelete);
}
final PsiMethod[] overridingMethods =
removeDeletedMethods(
OverridingMethodsSearch.search(psiMethod).toArray(PsiMethod.EMPTY_ARRAY),
allElementsToDelete);
findFunctionalExpressions(usages, ArrayUtil.prepend(psiMethod, overridingMethods));
final HashMap<PsiMethod, Collection<PsiReference>> methodToReferences = new HashMap<>();
for (PsiMethod overridingMethod : overridingMethods) {
final Collection<PsiReference> overridingReferences =
ReferencesSearch.search(overridingMethod).findAll();
methodToReferences.put(overridingMethod, overridingReferences);
}
final Set<PsiMethod> validOverriding =
validateOverridingMethods(
psiMethod,
references,
Arrays.asList(overridingMethods),
methodToReferences,
usages,
allElementsToDelete);
for (PsiReference reference : references) {
final PsiElement element = reference.getElement();
if (!isInside(element, allElementsToDelete) && !isInside(element, validOverriding)) {
usages.add(
new SafeDeleteReferenceJavaDeleteUsageInfo(
element,
psiMethod,
PsiTreeUtil.getParentOfType(element, PsiImportStaticStatement.class) != null));
}
}
final List<PsiMethod> calleesSafeToDelete =
SafeDeleteJavaCalleeChooser.computeCalleesSafeToDelete(psiMethod);
if (calleesSafeToDelete != null) {
for (PsiMethod method : calleesSafeToDelete) {
usages.add(new SafeDeleteMethodCalleeUsageInfo(method, psiMethod));
}
}
return usage -> {
if (usage instanceof PsiFile) return false;
return isInside(usage, allElementsToDelete) || isInside(usage, validOverriding);
};
}
