public static HighlightInfo checkForeignInnerClassesUsed(final PsiAnnotation annotation) {
final HighlightInfo[] infos = new HighlightInfo[1];
final PsiAnnotationOwner owner = annotation.getOwner();
if (owner instanceof PsiModifierList) {
final PsiElement parent = ((PsiModifierList) owner).getParent();
if (parent instanceof PsiClass) {
annotation.accept(
new JavaRecursiveElementWalkingVisitor() {
@Override
public void visitElement(PsiElement element) {
if (infos[0] != null) return;
super.visitElement(element);
}
@Override
public void visitClassObjectAccessExpression(
PsiClassObjectAccessExpression expression) {
super.visitClassObjectAccessExpression(expression);
final PsiTypeElement operand = expression.getOperand();
final PsiClass classType = PsiUtil.resolveClassInType(operand.getType());
if (classType != null) {
checkAccessibility(expression, classType, HighlightUtil.formatClass(classType));
}
}
@Override
public void visitReferenceExpression(PsiReferenceExpression expression) {
super.visitReferenceExpression(expression);
final PsiElement resolve = expression.resolve();
if (resolve instanceof PsiField) {
checkAccessibility(
expression,
(PsiMember) resolve,
HighlightUtil.formatField((PsiField) resolve));
}
}
private void checkAccessibility(
PsiExpression expression, PsiMember resolve, String memberString) {
if (resolve.hasModifierProperty(PsiModifier.PRIVATE)
&& PsiTreeUtil.isAncestor(parent, resolve, true)) {
String description =
JavaErrorMessages.message(
"private.symbol",
memberString,
HighlightUtil.formatClass((PsiClass) parent));
infos[0] =
HighlightInfo.newHighlightInfo(HighlightInfoType.ERROR)
.range(expression)
.descriptionAndTooltip(description)
.create();
}
}
});
}
}
return infos[0];
}
@Nullable
private static String doCheckRepeatableAnnotation(@NotNull PsiAnnotation annotation) {
PsiAnnotationOwner owner = annotation.getOwner();
if (!(owner instanceof PsiModifierList)) return null;
PsiElement target = ((PsiModifierList) owner).getParent();
if (!(target instanceof PsiClass) || !((PsiClass) target).isAnnotationType()) return null;
PsiClass container = getRepeatableContainer(annotation);
if (container == null) return null;
PsiMethod[] methods = container.findMethodsByName("value", false);
if (methods.length == 0) {
return JavaErrorMessages.message(
"annotation.container.no.value", container.getQualifiedName());
}
if (methods.length == 1) {
PsiType expected =
new PsiImmediateClassType((PsiClass) target, PsiSubstitutor.EMPTY).createArrayType();
if (!expected.equals(methods[0].getReturnType())) {
return JavaErrorMessages.message(
"annotation.container.bad.type",
container.getQualifiedName(),
JavaHighlightUtil.formatType(expected));
}
}
RetentionPolicy targetPolicy = getRetentionPolicy((PsiClass) target);
if (targetPolicy != null) {
RetentionPolicy containerPolicy = getRetentionPolicy(container);
if (containerPolicy != null && targetPolicy.compareTo(containerPolicy) > 0) {
return JavaErrorMessages.message(
"annotation.container.low.retention", container.getQualifiedName(), containerPolicy);
}
}
Set<PsiAnnotation.TargetType> repeatableTargets =
PsiImplUtil.getAnnotationTargets((PsiClass) target);
if (repeatableTargets != null) {
Set<PsiAnnotation.TargetType> containerTargets = PsiImplUtil.getAnnotationTargets(container);
if (containerTargets != null && !repeatableTargets.containsAll(containerTargets)) {
return JavaErrorMessages.message(
"annotation.container.wide.target", container.getQualifiedName());
}
}
return null;
}
@Nullable
public static HighlightInfo checkApplicability(
@NotNull PsiAnnotation annotation,
@NotNull LanguageLevel languageLevel,
@NotNull PsiFile containingFile) {
if (ANY_ANNOTATION_ALLOWED.accepts(annotation)) {
return null;
}
PsiJavaCodeReferenceElement nameRef = annotation.getNameReferenceElement();
if (nameRef == null) return null;
PsiAnnotationOwner owner = annotation.getOwner();
PsiAnnotation.TargetType[] targets = PsiImplUtil.getTargetsForLocation(owner);
if (owner == null || targets.length == 0) {
String message = JavaErrorMessages.message("annotation.not.allowed.here");
return annotationError(annotation, message);
}
if (!(owner instanceof PsiModifierList)) {
HighlightInfo info =
HighlightUtil.checkTypeAnnotationFeature(annotation, languageLevel, containingFile);
if (info != null) return info;
}
PsiAnnotation.TargetType applicable = PsiImplUtil.findApplicableTarget(annotation, targets);
if (applicable == PsiAnnotation.TargetType.UNKNOWN) return null;
if (applicable == null) {
String target = JavaErrorMessages.message("annotation.target." + targets[0]);
String message =
JavaErrorMessages.message("annotation.not.applicable", nameRef.getText(), target);
return annotationError(annotation, message);
}
if (applicable == PsiAnnotation.TargetType.TYPE_USE) {
if (owner instanceof PsiClassReferenceType) {
PsiJavaCodeReferenceElement ref = ((PsiClassReferenceType) owner).getReference();
HighlightInfo info = checkReferenceTarget(annotation, ref);
if (info != null) return info;
} else if (owner instanceof PsiModifierList) {
PsiElement nextElement =
PsiTreeUtil.skipSiblingsForward(
(PsiModifierList) owner,
PsiComment.class,
PsiWhiteSpace.class,
PsiTypeParameterList.class);
if (nextElement instanceof PsiTypeElement) {
PsiTypeElement typeElement = (PsiTypeElement) nextElement;
PsiType type = typeElement.getType();
if (PsiType.VOID.equals(type)) {
String message = JavaErrorMessages.message("annotation.not.allowed.void");
return annotationError(annotation, message);
}
if (!(type instanceof PsiPrimitiveType)) {
PsiJavaCodeReferenceElement ref =
getOutermostReferenceElement(typeElement.getInnermostComponentReferenceElement());
HighlightInfo info = checkReferenceTarget(annotation, ref);
if (info != null) return info;
}
}
} else if (owner instanceof PsiTypeElement) {
PsiElement context =
PsiTreeUtil.skipParentsOfType((PsiTypeElement) owner, PsiTypeElement.class);
if (context instanceof PsiClassObjectAccessExpression) {
String message = JavaErrorMessages.message("annotation.not.allowed.class");
return annotationError(annotation, message);
}
}
}
return null;
}
static HighlightInfo checkDuplicateAnnotations(@NotNull PsiAnnotation annotationToCheck) {
PsiAnnotationOwner owner = annotationToCheck.getOwner();
if (owner == null) return null;
PsiJavaCodeReferenceElement element = annotationToCheck.getNameReferenceElement();
if (element == null) return null;
PsiElement resolved = element.resolve();
if (!(resolved instanceof PsiClass)) return null;
PsiClass annotationType = (PsiClass) resolved;
PsiClass contained = contained(annotationType);
String containedElementFQN = contained == null ? null : contained.getQualifiedName();
if (containedElementFQN != null) {
PsiClass container = annotationType;
String containerName = container.getQualifiedName();
if (isAnnotationRepeatedTwice(owner, containedElementFQN)) {
String description =
JavaErrorMessages.message("annotation.container.wrong.place", containerName);
return annotationError(annotationToCheck, description);
}
} else if (isAnnotationRepeatedTwice(owner, annotationType.getQualifiedName())) {
if (!PsiUtil.isLanguageLevel8OrHigher(annotationToCheck)) {
String description = JavaErrorMessages.message("annotation.duplicate.annotation");
return HighlightInfo.newHighlightInfo(HighlightInfoType.ERROR)
.range(element)
.descriptionAndTooltip(description)
.create();
}
PsiAnnotation metaAnno =
PsiImplUtil.findAnnotation(
annotationType.getModifierList(), CommonClassNames.JAVA_LANG_ANNOTATION_REPEATABLE);
if (metaAnno == null) {
String explanation =
JavaErrorMessages.message(
"annotation.non.repeatable", annotationType.getQualifiedName());
String description =
JavaErrorMessages.message("annotation.duplicate.explained", explanation);
return HighlightInfo.newHighlightInfo(HighlightInfoType.ERROR)
.range(element)
.descriptionAndTooltip(description)
.create();
}
String explanation = doCheckRepeatableAnnotation(metaAnno);
if (explanation != null) {
String description =
JavaErrorMessages.message("annotation.duplicate.explained", explanation);
return HighlightInfo.newHighlightInfo(HighlightInfoType.ERROR)
.range(element)
.descriptionAndTooltip(description)
.create();
}
PsiClass container = getRepeatableContainer(metaAnno);
if (container != null) {
PsiAnnotation.TargetType[] targets = PsiImplUtil.getTargetsForLocation(owner);
PsiAnnotation.TargetType applicable = PsiImplUtil.findApplicableTarget(container, targets);
if (applicable == null) {
String target = JavaErrorMessages.message("annotation.target." + targets[0]);
String message =
JavaErrorMessages.message(
"annotation.container.not.applicable", container.getName(), target);
return annotationError(annotationToCheck, message);
}
}
}
for (PsiAnnotation annotation : owner.getAnnotations()) {
if (annotation == annotationToCheck) continue;
PsiJavaCodeReferenceElement nameRef = annotation.getNameReferenceElement();
if (nameRef == null) continue;
PsiElement aClass = nameRef.resolve();
if (!resolved.equals(aClass)) continue;
}
return null;
}