public static boolean proveArrayTypeDistinct(Project project, PsiArrayType type, PsiType bound) {
final JavaPsiFacade facade = JavaPsiFacade.getInstance(project);
final GlobalSearchScope searchScope = GlobalSearchScope.allScope(project);
final Set<PsiClass> possibleClasses = new HashSet<PsiClass>();
possibleClasses.add(facade.findClass(CommonClassNames.JAVA_IO_SERIALIZABLE, searchScope));
possibleClasses.add(facade.findClass(CommonClassNames.JAVA_LANG_CLONEABLE, searchScope));
possibleClasses.add(facade.findClass(CommonClassNames.JAVA_LANG_OBJECT, searchScope));
if (type.getArrayDimensions() == bound.getArrayDimensions()) {
final PsiType componentType = type.getComponentType();
final PsiType boundComponentType = ((PsiArrayType) bound).getComponentType();
if (boundComponentType instanceof PsiClassType && componentType instanceof PsiClassType) {
return proveExtendsBoundsDistinct(
boundComponentType,
componentType,
((PsiClassType) boundComponentType).resolve(),
((PsiClassType) componentType).resolve());
} else {
return !bound.equals(type);
}
} else if (bound.getArrayDimensions() + 1 == type.getArrayDimensions()
&& bound.getDeepComponentType() instanceof PsiClassType) {
return !possibleClasses.contains(((PsiClassType) bound.getDeepComponentType()).resolve());
} else if (bound.getArrayDimensions() == type.getArrayDimensions() + 1
&& type.getDeepComponentType() instanceof PsiClassType) {
return !possibleClasses.contains(((PsiClassType) type.getDeepComponentType()).resolve());
} else if (bound instanceof PsiClassType) {
return !possibleClasses.contains(((PsiClassType) bound).resolve());
} else if (bound instanceof PsiWildcardType) {
final PsiType boundBound = ((PsiWildcardType) bound).getBound();
return boundBound != null && !boundBound.equals(type);
}
return true;
}
@Nullable
private static String getTypeName(PsiType type, boolean withIndices) {
type = type.getDeepComponentType();
if (type instanceof PsiClassType) {
final PsiClassType classType = (PsiClassType) type;
final String className = classType.getClassName();
if (className != null || !withIndices) return className;
final PsiClass aClass = classType.resolve();
return aClass instanceof PsiAnonymousClass
? ((PsiAnonymousClass) aClass).getBaseClassType().getClassName()
: null;
} else if (type instanceof PsiPrimitiveType) {
return type.getPresentableText();
} else if (type instanceof PsiWildcardType) {
return getTypeName(((PsiWildcardType) type).getExtendsBound(), withIndices);
} else if (type instanceof PsiIntersectionType) {
return getTypeName(((PsiIntersectionType) type).getRepresentative(), withIndices);
} else if (type instanceof PsiCapturedWildcardType) {
return getTypeName(((PsiCapturedWildcardType) type).getWildcard(), withIndices);
} else if (type instanceof PsiDisjunctionType) {
return getTypeName(((PsiDisjunctionType) type).getLeastUpperBound(), withIndices);
} else {
return null;
}
}
public static boolean canBeMigrated(final PsiElement e) {
if (e == null) {
return false;
}
final PsiElement element = normalizeElement(e);
if (!element.getManager().isInProject(element)) {
return false;
}
final PsiType type = TypeMigrationLabeler.getElementType(element);
if (type != null) {
final PsiType elemenType = type instanceof PsiArrayType ? type.getDeepComponentType() : type;
if (elemenType instanceof PsiPrimitiveType) {
return !elemenType.equals(PsiType.VOID);
}
final PsiClass aClass = ((PsiClassType) elemenType).resolve();
return aClass != null /* && !aClass.hasTypeParameters()*/;
}
return false;
}
@Nullable
private static PsiClassType getComponentType(PsiType type) {
type = type.getDeepComponentType();
if (type instanceof PsiClassType) return (PsiClassType) type;
return null;
}
@Nullable
public static HighlightInfo checkMissingReturnStatement(PsiCodeBlock body, PsiType returnType) {
if (body == null
|| returnType == null
|| PsiType.VOID.equals(returnType.getDeepComponentType())) {
return null;
}
// do not compute constant expressions for if() statement condition
// see JLS 14.20 Unreachable Statements
try {
ControlFlow controlFlow = getControlFlowNoConstantEvaluate(body);
if (!ControlFlowUtil.returnPresent(controlFlow)) {
PsiJavaToken rBrace = body.getRBrace();
PsiElement context = rBrace == null ? body.getLastChild() : rBrace;
String message = JavaErrorMessages.message("missing.return.statement");
HighlightInfo info =
HighlightInfo.newHighlightInfo(HighlightInfoType.ERROR)
.range(context)
.descriptionAndTooltip(message)
.create();
PsiElement parent = body.getParent();
if (parent instanceof PsiMethod) {
PsiMethod method = (PsiMethod) parent;
QuickFixAction.registerQuickFixAction(info, QUICK_FIX_FACTORY.createAddReturnFix(method));
QuickFixAction.registerQuickFixAction(
info, QUICK_FIX_FACTORY.createMethodReturnFix(method, PsiType.VOID, true));
}
return info;
}
} catch (AnalysisCanceledException ignored) {
}
return null;
}
@Override
public String handleEmptyLookup(
@NotNull final CompletionParameters parameters, final Editor editor) {
if (!(parameters.getOriginalFile() instanceof PsiJavaFile)) return null;
final String ad = advertise(parameters);
final String suffix = ad == null ? "" : "; " + StringUtil.decapitalize(ad);
if (parameters.getCompletionType() == CompletionType.SMART) {
if (!ApplicationManager.getApplication().isUnitTestMode()) {
final Project project = parameters.getPosition().getProject();
final PsiFile file = parameters.getOriginalFile();
PsiExpression expression =
PsiTreeUtil.getContextOfType(parameters.getPosition(), PsiExpression.class, true);
if (expression != null && expression.getParent() instanceof PsiExpressionList) {
int lbraceOffset = expression.getParent().getTextRange().getStartOffset();
ShowParameterInfoHandler.invoke(project, editor, file, lbraceOffset, null);
}
if (expression instanceof PsiLiteralExpression) {
return LangBundle.message("completion.no.suggestions") + suffix;
}
if (expression instanceof PsiInstanceOfExpression) {
final PsiInstanceOfExpression instanceOfExpression = (PsiInstanceOfExpression) expression;
if (PsiTreeUtil.isAncestor(
instanceOfExpression.getCheckType(), parameters.getPosition(), false)) {
return LangBundle.message("completion.no.suggestions") + suffix;
}
}
}
final Set<PsiType> expectedTypes = JavaCompletionUtil.getExpectedTypes(parameters);
if (expectedTypes != null) {
PsiType type = expectedTypes.size() == 1 ? expectedTypes.iterator().next() : null;
if (type != null) {
final PsiType deepComponentType = type.getDeepComponentType();
if (deepComponentType instanceof PsiClassType) {
if (((PsiClassType) deepComponentType).resolve() != null) {
return CompletionBundle.message(
"completion.no.suggestions.of.type", type.getPresentableText())
+ suffix;
}
return CompletionBundle.message("completion.unknown.type", type.getPresentableText())
+ suffix;
}
if (!PsiType.NULL.equals(type)) {
return CompletionBundle.message(
"completion.no.suggestions.of.type", type.getPresentableText())
+ suffix;
}
}
}
}
return LangBundle.message("completion.no.suggestions") + suffix;
}
@Override
public void visitForStatement(@NotNull PsiForStatement statement) {
super.visitForStatement(statement);
final PsiStatement initialization = statement.getInitialization();
if (!(initialization instanceof PsiDeclarationStatement)) {
return;
}
final PsiDeclarationStatement declaration = (PsiDeclarationStatement) initialization;
final PsiElement[] declaredElements = declaration.getDeclaredElements();
if (declaredElements.length != 1) {
return;
}
final PsiElement declaredElement = declaredElements[0];
if (!(declaredElement instanceof PsiLocalVariable)) {
return;
}
final PsiLocalVariable variable = (PsiLocalVariable) declaredElement;
final PsiExpression initialValue = variable.getInitializer();
if (initialValue == null) {
return;
}
final PsiExpression condition = statement.getCondition();
if (!ExpressionUtils.isVariableLessThanComparison(condition, variable)) {
return;
}
final PsiStatement update = statement.getUpdate();
if (!VariableAccessUtils.variableIsIncremented(variable, update)) {
return;
}
final PsiArrayAccessExpression arrayAccessExpression = getArrayAccessExpression(statement);
if (arrayAccessExpression == null) {
return;
}
final PsiExpression arrayExpression = arrayAccessExpression.getArrayExpression();
final PsiType type = arrayExpression.getType();
if (!(type instanceof PsiArrayType)
|| type.getDeepComponentType() instanceof PsiPrimitiveType) {
return;
}
final PsiStatement body = statement.getBody();
if (!bodyIsArrayToCollectionCopy(body, variable, true)) {
return;
}
registerStatementError(statement);
}
@Override
public void addTypeReference(PsiElement psiElement, PsiType psiType, RefManager refManager) {
RefClass ownerClass = getOwnerClass(refManager, psiElement);
if (ownerClass != null) {
psiType = psiType.getDeepComponentType();
if (psiType instanceof PsiClassType) {
PsiClass psiClass = PsiUtil.resolveClassInType(psiType);
if (psiClass != null && refManager.belongsToScope(psiClass)) {
RefClassImpl refClass = (RefClassImpl) refManager.getReference(psiClass);
if (refClass != null) {
refClass.addTypeReference(ownerClass);
}
}
}
}
}
private static void generateNamesForArrayType(
PsiType type, Set<String> possibleNames, NameValidator validator) {
int arrayDim = type.getArrayDimensions();
if (arrayDim == 0) return;
PsiType deepType = type.getDeepComponentType();
String candidateName = cleanTypeName(deepType.getPresentableText());
if (deepType instanceof PsiClassType) {
PsiClass clazz = ((PsiClassType) deepType).resolve();
if (clazz == null) return;
candidateName = GroovyNamesUtil.fromLowerLetter(clazz.getName());
}
candidateName = StringUtil.pluralize(GroovyNamesUtil.fromLowerLetter(candidateName));
generateCamelNames(possibleNames, validator, candidateName);
ArrayList<String> camelizedName = GroovyNamesUtil.camelizeString(candidateName);
candidateName = camelizedName.get(camelizedName.size() - 1);
candidateName = "arrayOf" + fromUpperLetter(candidateName);
possibleNames.add(validator.validateName(candidateName, true));
}
private static void changeNewOperatorType(
PsiNewExpression originalExpression, PsiType toType, final Editor editor)
throws IncorrectOperationException {
PsiNewExpression newExpression;
PsiElementFactory factory =
JavaPsiFacade.getInstance(originalExpression.getProject()).getElementFactory();
int caretOffset;
TextRange selection;
if (toType instanceof PsiArrayType) {
final PsiExpression[] originalExpressionArrayDimensions =
originalExpression.getArrayDimensions();
caretOffset = 0;
@NonNls String text = "new " + toType.getDeepComponentType().getCanonicalText() + "[";
if (originalExpressionArrayDimensions.length > 0) {
text += originalExpressionArrayDimensions[0].getText();
} else {
text += "0";
caretOffset = -2;
}
text += "]";
for (int i = 1; i < toType.getArrayDimensions(); i++) {
text += "[";
String arrayDimension = "";
if (originalExpressionArrayDimensions.length > i) {
arrayDimension = originalExpressionArrayDimensions[i].getText();
text += arrayDimension;
}
text += "]";
if (caretOffset < 0) {
caretOffset -= arrayDimension.length() + 2;
}
}
newExpression = (PsiNewExpression) factory.createExpressionFromText(text, originalExpression);
if (caretOffset < 0) {
selection = new TextRange(caretOffset, caretOffset + 1);
} else {
selection = null;
}
} else {
final PsiAnonymousClass anonymousClass = originalExpression.getAnonymousClass();
newExpression =
(PsiNewExpression)
factory.createExpressionFromText(
"new " + toType.getCanonicalText() + "()" + (anonymousClass != null ? "{}" : ""),
originalExpression);
PsiExpressionList argumentList = originalExpression.getArgumentList();
if (argumentList == null) return;
newExpression.getArgumentList().replace(argumentList);
if (anonymousClass == null) { // just to prevent useless inference
if (PsiDiamondTypeUtil.canCollapseToDiamond(newExpression, originalExpression, toType)) {
final PsiElement paramList =
PsiDiamondTypeUtil.replaceExplicitWithDiamond(
newExpression.getClassOrAnonymousClassReference().getParameterList());
newExpression = PsiTreeUtil.getParentOfType(paramList, PsiNewExpression.class);
}
}
if (anonymousClass != null) {
final PsiAnonymousClass newAnonymousClass =
(PsiAnonymousClass) newExpression.getAnonymousClass().replace(anonymousClass);
final PsiClass aClass = PsiUtil.resolveClassInType(toType);
assert aClass != null;
newAnonymousClass
.getBaseClassReference()
.replace(factory.createClassReferenceElement(aClass));
}
selection = null;
caretOffset = -1;
}
PsiElement element = originalExpression.replace(newExpression);
editor.getCaretModel().moveToOffset(element.getTextRange().getEndOffset() + caretOffset);
editor.getScrollingModel().scrollToCaret(ScrollType.RELATIVE);
if (selection != null) {
selection = selection.shiftRight(element.getTextRange().getEndOffset());
editor.getSelectionModel().setSelection(selection.getStartOffset(), selection.getEndOffset());
}
}
public static void processSubTypes(
PsiType psiType,
final PsiElement context,
boolean getRawSubtypes,
@NotNull final PrefixMatcher matcher,
Consumer<PsiType> consumer) {
int arrayDim = psiType.getArrayDimensions();
psiType = psiType.getDeepComponentType();
if (!(psiType instanceof PsiClassType)) return;
final Condition<String> shortNameCondition =
new Condition<String>() {
@Override
public boolean value(String s) {
return matcher.prefixMatches(s);
}
};
final PsiClassType baseType = (PsiClassType) psiType;
final PsiClassType.ClassResolveResult baseResult =
ApplicationManager.getApplication()
.runReadAction(
new Computable<PsiClassType.ClassResolveResult>() {
@Override
public PsiClassType.ClassResolveResult compute() {
return JavaCompletionUtil.originalize(baseType).resolveGenerics();
}
});
final PsiClass baseClass = baseResult.getElement();
final PsiSubstitutor baseSubstitutor = baseResult.getSubstitutor();
if (baseClass == null) return;
final GlobalSearchScope scope =
ApplicationManager.getApplication()
.runReadAction(
new Computable<GlobalSearchScope>() {
@Override
public GlobalSearchScope compute() {
return context.getResolveScope();
}
});
final Processor<PsiClass> inheritorsProcessor =
createInheritorsProcessor(
context, baseType, arrayDim, getRawSubtypes, consumer, baseClass, baseSubstitutor);
if (matcher.getPrefix().length() > 2) {
AllClassesGetter.processJavaClasses(
matcher,
context.getProject(),
scope,
new Processor<PsiClass>() {
@Override
public boolean process(PsiClass psiClass) {
if (psiClass.isInheritor(baseClass, true)) {
return inheritorsProcessor.process(psiClass);
}
return true;
}
});
} else {
final Query<PsiClass> baseQuery =
ClassInheritorsSearch.search(
new ClassInheritorsSearch.SearchParameters(
baseClass, scope, true, false, false, shortNameCondition));
final Query<PsiClass> query =
new FilteredQuery<PsiClass>(
baseQuery,
new Condition<PsiClass>() {
@Override
public boolean value(final PsiClass psiClass) {
return !(psiClass instanceof PsiTypeParameter);
}
});
query.forEach(inheritorsProcessor);
}
}
@Nullable
public static PsiType getVariableTypeByExpressionType(
@Nullable PsiType type, final boolean openCaptured) {
if (type == null) return null;
if (type instanceof PsiCapturedWildcardType) {
type = ((PsiCapturedWildcardType) type).getWildcard();
}
PsiType transformed =
type.accept(
new PsiTypeVisitor<PsiType>() {
@Override
public PsiType visitArrayType(PsiArrayType arrayType) {
PsiType componentType = arrayType.getComponentType();
PsiType type = componentType.accept(this);
if (type == componentType) return arrayType;
return type.createArrayType();
}
@Override
public PsiType visitType(PsiType type) {
return type;
}
@Override
public PsiType visitWildcardType(final PsiWildcardType wildcardType) {
final PsiType bound = wildcardType.getBound();
PsiManager manager = wildcardType.getManager();
if (bound != null) {
final PsiType acceptedBound = bound.accept(this);
if (acceptedBound instanceof PsiWildcardType) {
if (((PsiWildcardType) acceptedBound).isExtends() != wildcardType.isExtends())
return PsiWildcardType.createUnbounded(manager);
return acceptedBound;
}
if (wildcardType.isExtends()
&& acceptedBound.equalsToText(CommonClassNames.JAVA_LANG_OBJECT))
return PsiWildcardType.createUnbounded(manager);
if (acceptedBound.equals(bound)) return wildcardType;
return wildcardType.isExtends()
? PsiWildcardType.createExtends(manager, acceptedBound)
: PsiWildcardType.createSuper(manager, acceptedBound);
}
return wildcardType;
}
@Override
public PsiType visitCapturedWildcardType(
PsiCapturedWildcardType capturedWildcardType) {
return openCaptured
? capturedWildcardType.getWildcard().accept(this)
: capturedWildcardType;
}
@Override
public PsiType visitClassType(PsiClassType classType) {
PsiClassType.ClassResolveResult resolveResult = classType.resolveGenerics();
PsiClass aClass = resolveResult.getElement();
if (aClass == null) return classType;
boolean toExtend = false;
PsiSubstitutor substitutor = PsiSubstitutor.EMPTY;
for (PsiTypeParameter typeParameter : PsiUtil.typeParametersIterable(aClass)) {
PsiType typeArgument = resolveResult.getSubstitutor().substitute(typeParameter);
if (typeArgument instanceof PsiCapturedWildcardType) toExtend = true;
if (typeArgument instanceof PsiWildcardType
&& ((PsiWildcardType) typeArgument).getBound()
instanceof PsiIntersectionType) {
toExtend = true;
}
PsiType toPut;
if (typeArgument == null) {
toPut = null;
} else {
final PsiType accepted = typeArgument.accept(this);
if (typeArgument instanceof PsiIntersectionType) {
toPut = PsiWildcardType.createExtends(typeParameter.getManager(), accepted);
} else {
toPut = accepted;
}
}
LOG.assertTrue(toPut == null || toPut.isValid(), toPut);
substitutor = substitutor.put(typeParameter, toPut);
}
final PsiAnnotation[] applicableAnnotations = classType.getApplicableAnnotations();
if (substitutor == PsiSubstitutor.EMPTY
&& !toExtend
&& applicableAnnotations.length == 0
&& !(aClass instanceof PsiTypeParameter)) return classType;
PsiManager manager = aClass.getManager();
PsiType result =
JavaPsiFacade.getInstance(manager.getProject())
.getElementFactory()
.createType(
aClass,
substitutor,
PsiUtil.getLanguageLevel(aClass),
applicableAnnotations);
if (toExtend) result = PsiWildcardType.createExtends(manager, result);
return result;
}
});
PsiType componentType = transformed != null ? transformed.getDeepComponentType() : null;
if (componentType instanceof PsiWildcardType) {
componentType = ((PsiWildcardType) componentType).getExtendsBound();
int dims = transformed.getArrayDimensions();
for (int i = 0; i < dims; i++) componentType = componentType.createArrayType();
return componentType;
}
return transformed;
}