@Nullable
public static PsiClass getSuperClass(@NotNull PsiClass psiClass) {
PsiManager manager = psiClass.getManager();
GlobalSearchScope resolveScope = psiClass.getResolveScope();
final JavaPsiFacade facade = JavaPsiFacade.getInstance(manager.getProject());
if (psiClass.isInterface()) {
return facade.findClass(CommonClassNames.JAVA_LANG_OBJECT, resolveScope);
}
if (psiClass.isEnum()) {
return facade.findClass(CommonClassNames.JAVA_LANG_ENUM, resolveScope);
}
if (psiClass instanceof PsiAnonymousClass) {
PsiClassType baseClassReference = ((PsiAnonymousClass) psiClass).getBaseClassType();
PsiClass baseClass = baseClassReference.resolve();
if (baseClass == null || baseClass.isInterface())
return facade.findClass(CommonClassNames.JAVA_LANG_OBJECT, resolveScope);
return baseClass;
}
if (CommonClassNames.JAVA_LANG_OBJECT.equals(psiClass.getQualifiedName())) return null;
final PsiClassType[] referenceElements = psiClass.getExtendsListTypes();
if (referenceElements.length == 0)
return facade.findClass(CommonClassNames.JAVA_LANG_OBJECT, resolveScope);
PsiClass psiResoved = referenceElements[0].resolve();
return psiResoved == null
? facade.findClass(CommonClassNames.JAVA_LANG_OBJECT, resolveScope)
: psiResoved;
}
@NotNull
private static PsiClass[] resolveClassReferenceList(
@NotNull PsiClassType[] listOfTypes,
@NotNull PsiManager manager,
@NotNull GlobalSearchScope resolveScope,
boolean includeObject) {
PsiClass objectClass =
JavaPsiFacade.getInstance(manager.getProject())
.findClass(CommonClassNames.JAVA_LANG_OBJECT, resolveScope);
if (objectClass == null) includeObject = false;
if (listOfTypes.length == 0) {
if (includeObject) return new PsiClass[] {objectClass};
return PsiClass.EMPTY_ARRAY;
}
int referenceCount = listOfTypes.length;
if (includeObject) referenceCount++;
PsiClass[] resolved = new PsiClass[referenceCount];
int resolvedCount = 0;
if (includeObject) resolved[resolvedCount++] = objectClass;
for (PsiClassType reference : listOfTypes) {
PsiClass refResolved = reference.resolve();
if (refResolved != null) resolved[resolvedCount++] = refResolved;
}
if (resolvedCount < referenceCount) {
PsiClass[] shorter = new PsiClass[resolvedCount];
System.arraycopy(resolved, 0, shorter, 0, resolvedCount);
resolved = shorter;
}
return resolved;
}
@Nullable
public PsiClass getContainingClassElement() {
final PsiClassType containingClassType =
JavaPsiFacade.getInstance(getProject())
.getElementFactory()
.createTypeByFQClassName(myContainingClassName, ProjectScope.getAllScope(getProject()));
return containingClassType.resolve();
}
@Override
public void visitThrowStatement(PsiThrowStatement statement) {
super.visitThrowStatement(statement);
final PsiCatchSection catchSection =
PsiTreeUtil.getParentOfType(statement, PsiCatchSection.class, true, PsiClass.class);
if (catchSection == null) {
return;
}
final PsiParameter parameter = catchSection.getParameter();
if (parameter == null) {
return;
}
@NonNls final String parameterName = parameter.getName();
if (PsiUtil.isIgnoredName(parameterName)) {
return;
}
final PsiExpression exception = statement.getException();
if (exception == null) {
return;
}
if (ignoreCantWrap) {
final PsiType thrownType = exception.getType();
if (thrownType instanceof PsiClassType) {
final PsiClassType classType = (PsiClassType) thrownType;
final PsiClass exceptionClass = classType.resolve();
if (exceptionClass != null) {
final PsiMethod[] constructors = exceptionClass.getConstructors();
final PsiClassType throwableType =
TypeUtils.getType(CommonClassNames.JAVA_LANG_THROWABLE, statement);
boolean canWrap = false;
outer:
for (PsiMethod constructor : constructors) {
final PsiParameterList parameterList = constructor.getParameterList();
final PsiParameter[] parameters = parameterList.getParameters();
for (PsiParameter constructorParameter : parameters) {
final PsiType type = constructorParameter.getType();
if (throwableType.equals(type)) {
canWrap = true;
break outer;
}
}
}
if (!canWrap) {
return;
}
}
}
}
final ReferenceFinder visitor = new ReferenceFinder(parameter);
exception.accept(visitor);
if (visitor.usesParameter()) {
return;
}
registerStatementError(statement);
}
private boolean isTypeParameter(PsiType type) {
if (!(type instanceof PsiClassType)) {
return false;
}
final PsiClassType classType = (PsiClassType) type;
final PsiClass aClass = classType.resolve();
if (aClass == null) {
return false;
}
return aClass instanceof PsiTypeParameter;
}
@NotNull
private static PsiClass[] getSupersInner(@NotNull PsiClass psiClass) {
PsiClassType[] extendsListTypes = psiClass.getExtendsListTypes();
PsiClassType[] implementsListTypes = psiClass.getImplementsListTypes();
if (psiClass.isInterface()) {
return resolveClassReferenceList(
extendsListTypes, psiClass.getManager(), psiClass.getResolveScope(), true);
}
if (psiClass instanceof PsiAnonymousClass) {
PsiAnonymousClass psiAnonymousClass = (PsiAnonymousClass) psiClass;
PsiClassType baseClassReference = psiAnonymousClass.getBaseClassType();
PsiClass baseClass = baseClassReference.resolve();
if (baseClass != null) {
if (baseClass.isInterface()) {
PsiClass objectClass =
JavaPsiFacade.getInstance(psiClass.getProject())
.findClass(CommonClassNames.JAVA_LANG_OBJECT, psiClass.getResolveScope());
return objectClass != null
? new PsiClass[] {objectClass, baseClass}
: new PsiClass[] {baseClass};
}
return new PsiClass[] {baseClass};
}
PsiClass objectClass =
JavaPsiFacade.getInstance(psiClass.getProject())
.findClass(CommonClassNames.JAVA_LANG_OBJECT, psiClass.getResolveScope());
return objectClass != null ? new PsiClass[] {objectClass} : PsiClass.EMPTY_ARRAY;
}
if (psiClass instanceof PsiTypeParameter) {
if (extendsListTypes.length == 0) {
final PsiClass objectClass =
JavaPsiFacade.getInstance(psiClass.getProject())
.findClass(CommonClassNames.JAVA_LANG_OBJECT, psiClass.getResolveScope());
return objectClass != null ? new PsiClass[] {objectClass} : PsiClass.EMPTY_ARRAY;
}
return resolveClassReferenceList(
extendsListTypes, psiClass.getManager(), psiClass.getResolveScope(), false);
}
PsiClass[] interfaces =
resolveClassReferenceList(
implementsListTypes, psiClass.getManager(), psiClass.getResolveScope(), false);
PsiClass superClass = getSuperClass(psiClass);
if (superClass == null) return interfaces;
PsiClass[] types = new PsiClass[interfaces.length + 1];
types[0] = superClass;
System.arraycopy(interfaces, 0, types, 1, interfaces.length);
return types;
}
@NotNull
public static PsiClass[] getInterfaces(@NotNull PsiTypeParameter typeParameter) {
final PsiClassType[] referencedTypes = typeParameter.getExtendsListTypes();
if (referencedTypes.length == 0) {
return PsiClass.EMPTY_ARRAY;
}
final List<PsiClass> result = new ArrayList<PsiClass>(referencedTypes.length);
for (PsiClassType referencedType : referencedTypes) {
final PsiClass psiClass = referencedType.resolve();
if (psiClass != null && psiClass.isInterface()) {
result.add(psiClass);
}
}
return result.toArray(new PsiClass[result.size()]);
}
@Nullable
private PsiType extractListTypeFromContainingClass(PsiElement element) {
PsiClass listClass = PsiTreeUtil.getParentOfType(element, PsiClass.class);
if (listClass == null) {
return null;
}
final PsiMethod[] getMethods = listClass.findMethodsByName("get", true);
if (getMethods.length == 0) {
return null;
}
final PsiType type = getMethods[0].getReturnType();
if (!(type instanceof PsiClassType)) {
return null;
}
final PsiClassType classType = (PsiClassType) type;
final PsiClass parameterClass = classType.resolve();
if (parameterClass == null) {
return null;
}
PsiClass subClass = null;
while (listClass != null && !listClass.hasTypeParameters()) {
subClass = listClass;
listClass = listClass.getSuperClass();
}
if (listClass == null || subClass == null) {
return TypeUtils.getObjectType(element);
}
final PsiTypeParameter[] typeParameters = listClass.getTypeParameters();
if (!parameterClass.equals(typeParameters[0])) {
return TypeUtils.getObjectType(element);
}
final PsiReferenceList extendsList = subClass.getExtendsList();
if (extendsList == null) {
return null;
}
final PsiJavaCodeReferenceElement[] referenceElements = extendsList.getReferenceElements();
if (referenceElements.length == 0) {
return null;
}
final PsiType[] types = referenceElements[0].getTypeParameters();
if (types.length == 0) {
return TypeUtils.getObjectType(element);
}
return types[0];
}
@NotNull
public static PsiClass[] getInterfaces(@NotNull PsiClass psiClass) {
if (psiClass.isInterface()) {
final PsiClassType[] extendsListTypes = psiClass.getExtendsListTypes();
return resolveClassReferenceList(
extendsListTypes, psiClass.getManager(), psiClass.getResolveScope(), false);
}
if (psiClass instanceof PsiAnonymousClass) {
PsiClassType baseClassReference = ((PsiAnonymousClass) psiClass).getBaseClassType();
PsiClass baseClass = baseClassReference.resolve();
return baseClass != null && baseClass.isInterface()
? new PsiClass[] {baseClass}
: PsiClass.EMPTY_ARRAY;
}
final PsiClassType[] implementsListTypes = psiClass.getImplementsListTypes();
return resolveClassReferenceList(
implementsListTypes, psiClass.getManager(), psiClass.getResolveScope(), false);
}
private void checkExpression(PsiExpression expression) {
if (expression == null) return;
final PsiType type = expression.getType();
if (!(type instanceof PsiClassType)) return;
if (IGNORE_TOSTRING
&& MethodUtils.isToString(PsiTreeUtil.getParentOfType(expression, PsiMethod.class)))
return;
if (IGNORE_EXCEPTION
&& (ExceptionUtils.isExceptionArgument(expression)
|| PsiTreeUtil.getParentOfType(
expression, PsiThrowStatement.class, true, PsiCodeBlock.class, PsiClass.class)
!= null)) return;
if (IGNORE_ASSERT
&& PsiTreeUtil.getParentOfType(
expression, PsiAssertStatement.class, true, PsiCodeBlock.class, PsiClass.class)
!= null) {
return;
}
if (IGNORE_NONNLS && NonNlsUtils.isNonNlsAnnotatedUse(expression)) return;
final PsiClassType classType = (PsiClassType) type;
if (type.equalsToText(CommonClassNames.JAVA_LANG_OBJECT)) return;
final PsiClass referencedClass = classType.resolve();
if (referencedClass == null || referencedClass instanceof PsiTypeParameter) return;
if (referencedClass.isEnum() || referencedClass.isInterface()) return;
if (referencedClass.hasModifierProperty(PsiModifier.ABSTRACT)
&& !(expression instanceof PsiSuperExpression)) return;
if (hasGoodToString(referencedClass)) return;
registerError(expression);
}
@NotNull
public static PsiClassType[] getSuperTypes(@NotNull PsiClass psiClass) {
if (psiClass instanceof PsiAnonymousClass) {
PsiClassType baseClassType = ((PsiAnonymousClass) psiClass).getBaseClassType();
PsiClass baseClass = baseClassType.resolve();
if (baseClass == null || !baseClass.isInterface()) {
return new PsiClassType[] {baseClassType};
} else {
PsiClassType objectType =
PsiType.getJavaLangObject(psiClass.getManager(), psiClass.getResolveScope());
return new PsiClassType[] {objectType, baseClassType};
}
}
PsiClassType[] extendsTypes = psiClass.getExtendsListTypes();
PsiClassType[] implementsTypes = psiClass.getImplementsListTypes();
boolean hasExtends = extendsTypes.length != 0;
int extendsListLength = extendsTypes.length + (hasExtends ? 0 : 1);
PsiClassType[] result = new PsiClassType[extendsListLength + implementsTypes.length];
System.arraycopy(extendsTypes, 0, result, 0, extendsTypes.length);
if (!hasExtends) {
if (CommonClassNames.JAVA_LANG_OBJECT.equals(psiClass.getQualifiedName())) {
return PsiClassType.EMPTY_ARRAY;
}
PsiManager manager = psiClass.getManager();
PsiClassType objectType = PsiType.getJavaLangObject(manager, psiClass.getResolveScope());
result[0] = objectType;
}
System.arraycopy(implementsTypes, 0, result, extendsListLength, implementsTypes.length);
for (int i = 0; i < result.length; i++) {
PsiClassType type = result[i];
result[i] = (PsiClassType) PsiUtil.captureToplevelWildcards(type, psiClass);
}
return result;
}
