private Nullness calcInherentNullability() {
PsiModifierListOwner var = getPsiVariable();
Nullness nullability = DfaPsiUtil.getElementNullability(getVariableType(), var);
if (nullability != Nullness.UNKNOWN) {
return nullability;
}
Nullness defaultNullability =
myFactory.isUnknownMembersAreNullable() && MEMBER_OR_METHOD_PARAMETER.accepts(var)
? Nullness.NULLABLE
: Nullness.UNKNOWN;
if (var instanceof PsiParameter && var.getParent() instanceof PsiForeachStatement) {
PsiExpression iteratedValue = ((PsiForeachStatement) var.getParent()).getIteratedValue();
if (iteratedValue != null) {
PsiType itemType = JavaGenericsUtil.getCollectionItemType(iteratedValue);
if (itemType != null) {
return DfaPsiUtil.getElementNullability(itemType, var);
}
}
}
if (var instanceof PsiField
&& DfaPsiUtil.isFinalField((PsiVariable) var)
&& myFactory.isHonorFieldInitializers()) {
List<PsiExpression> initializers = DfaPsiUtil.findAllConstructorInitializers((PsiField) var);
if (initializers.isEmpty()) {
return defaultNullability;
}
boolean hasUnknowns = false;
for (PsiExpression expression : initializers) {
Nullness nullness = getFieldInitializerNullness(expression);
if (nullness == Nullness.NULLABLE) {
return Nullness.NULLABLE;
}
if (nullness == Nullness.UNKNOWN) {
hasUnknowns = true;
}
}
if (hasUnknowns) {
if (DfaPsiUtil.isInitializedNotNull((PsiField) var)) {
return Nullness.NOT_NULL;
}
return defaultNullability;
}
return Nullness.NOT_NULL;
}
return defaultNullability;
}
@Override
public String getAccessModifier(PsiModifierListOwner psiElement) {
if (psiElement instanceof PsiParameter) return PsiModifier.PACKAGE_LOCAL;
PsiModifierList list = psiElement.getModifierList();
String result = PsiModifier.PACKAGE_LOCAL;
if (list != null) {
if (list.hasModifierProperty(PsiModifier.PRIVATE)) {
result = PsiModifier.PRIVATE;
} else if (list.hasModifierProperty(PsiModifier.PROTECTED)) {
result = PsiModifier.PROTECTED;
} else if (list.hasModifierProperty(PsiModifier.PUBLIC)) {
result = PsiModifier.PUBLIC;
} else if (psiElement.getParent() instanceof PsiClass) {
PsiClass ownerClass = (PsiClass) psiElement.getParent();
if (ownerClass.isInterface()) {
result = PsiModifier.PUBLIC;
}
}
}
return result;
}
@Nullable
private static PsiAnnotation findContainerAnnotation(
PsiModifierListOwner owner, String annotationFQN) {
PsiElement element = owner.getParent();
while (element != null) {
if (element instanceof PsiModifierListOwner) {
PsiAnnotation annotation =
AnnotationUtil.findAnnotation((PsiModifierListOwner) element, annotationFQN);
if (annotation != null) {
return annotation;
}
}
if (element instanceof PsiClassOwner) {
String packageName = ((PsiClassOwner) element).getPackageName();
PsiPackage psiPackage =
JavaPsiFacade.getInstance(element.getProject()).findPackage(packageName);
return AnnotationUtil.findAnnotation(psiPackage, annotationFQN);
}
element = element.getContext();
}
return null;
}
