public static Set<PsiType> flatten(PsiType[] conjuncts, Set<PsiType> types) {
for (PsiType conjunct : conjuncts) {
if (conjunct instanceof PsiIntersectionType) {
PsiIntersectionType type = (PsiIntersectionType) conjunct;
flatten(type.getConjuncts(), types);
} else {
types.add(conjunct);
}
}
if (types.size() > 1) {
PsiType[] array = types.toArray(createArray(types.size()));
for (Iterator<PsiType> iterator = types.iterator(); iterator.hasNext(); ) {
PsiType type = iterator.next();
for (PsiType existing : array) {
if (type != existing) {
final boolean allowUncheckedConversion =
type instanceof PsiClassType && ((PsiClassType) type).isRaw();
if (TypeConversionUtil.isAssignable(type, existing, allowUncheckedConversion)) {
iterator.remove();
break;
}
}
}
}
if (types.isEmpty()) {
types.add(array[0]);
}
}
return types;
}
private static boolean isReturnTypeIsMoreSpecificThan(
@NotNull HierarchicalMethodSignature thisSig, @NotNull HierarchicalMethodSignature thatSig) {
PsiType thisRet = thisSig.getSubstitutor().substitute(thisSig.getMethod().getReturnType());
PsiType thatRet = thatSig.getSubstitutor().substitute(thatSig.getMethod().getReturnType());
return thatRet != null
&& thisRet != null
&& !thatRet.equals(thisRet)
&& TypeConversionUtil.isAssignable(thatRet, thisRet, false);
}
public static boolean isCorrectAssignment(
PsiType[] parameterTypes, PsiType[] argTypes, boolean varargs, int offset) {
final int min = Math.min(parameterTypes.length, argTypes.length - offset);
for (int i = 0; i < min; i++) {
final PsiType argType = argTypes[i + offset];
PsiType parameterType = parameterTypes[i];
parameterType = GenericsUtil.getVariableTypeByExpressionType(parameterType, true);
if (varargs && i == parameterTypes.length - 1) {
if (!TypeConversionUtil.isAssignable(parameterType, argType)
&& !TypeConversionUtil.isAssignable(
((PsiArrayType) parameterType).getComponentType(), argType)) {
return false;
}
} else if (!TypeConversionUtil.isAssignable(parameterType, argType)) {
return false;
}
}
return !varargs || parameterTypes.length - 1 <= argTypes.length - offset;
}
private static PsiType doFun(GrReferenceExpression refExpr) {
if (ResolveUtil.isClassReference(refExpr)) {
GrExpression qualifier = refExpr.getQualifier();
LOG.assertTrue(qualifier != null);
return TypesUtil.createJavaLangClassType(
qualifier.getType(), refExpr.getProject(), refExpr.getResolveScope());
}
if (PsiUtil.isCompileStatic(refExpr)) {
final GroovyResolveResult resolveResult = refExpr.advancedResolve();
final PsiElement resolvedF = resolveResult.getElement();
final PsiType type;
if (resolvedF instanceof GrField) {
type = ((GrField) resolvedF).getType();
} else if (resolvedF instanceof GrAccessorMethod) {
type = ((GrAccessorMethod) resolvedF).getProperty().getType();
} else {
type = null;
}
if (type != null) {
return resolveResult.getSubstitutor().substitute(type);
}
}
final PsiElement resolved = refExpr.resolve();
final PsiType nominal = refExpr.getNominalType();
Boolean reassigned = GrReassignedLocalVarsChecker.isReassignedVar(refExpr);
if (reassigned != null && reassigned.booleanValue()) {
return GrReassignedLocalVarsChecker.getReassignedVarType(refExpr, true);
}
final PsiType inferred = getInferredTypes(refExpr, resolved);
if (inferred == null) {
if (nominal == null) {
// inside nested closure we could still try to infer from variable initializer. Not sound,
// but makes sense
if (resolved instanceof GrVariable) {
LOG.assertTrue(resolved.isValid());
return ((GrVariable) resolved).getTypeGroovy();
}
}
return nominal;
}
if (nominal == null) return inferred;
if (!TypeConversionUtil.isAssignable(TypeConversionUtil.erasure(nominal), inferred, false)) {
if (resolved instanceof GrVariable
&& ((GrVariable) resolved).getTypeElementGroovy() != null) {
return nominal;
}
}
return inferred;
}
static PsiExpression createCastExpression(
PsiExpression originalExpression, Project project, PsiType type)
throws IncorrectOperationException {
// remove nested casts
PsiElement element = PsiUtil.deparenthesizeExpression(originalExpression);
PsiElementFactory factory =
JavaPsiFacade.getInstance(originalExpression.getProject()).getElementFactory();
PsiTypeCastExpression typeCast =
(PsiTypeCastExpression) factory.createExpressionFromText("(Type)value", null);
typeCast = (PsiTypeCastExpression) CodeStyleManager.getInstance(project).reformat(typeCast);
typeCast.getCastType().replace(factory.createTypeElement(type));
if (element instanceof PsiConditionalExpression) {
// we'd better cast one branch of ternary expression if we could
PsiConditionalExpression expression = (PsiConditionalExpression) element.copy();
PsiExpression thenE = expression.getThenExpression();
PsiExpression elseE = expression.getElseExpression();
PsiType thenType = thenE == null ? null : thenE.getType();
PsiType elseType = elseE == null ? null : elseE.getType();
if (elseType != null && thenType != null) {
boolean replaceThen = !TypeConversionUtil.isAssignable(type, thenType);
boolean replaceElse = !TypeConversionUtil.isAssignable(type, elseType);
if (replaceThen != replaceElse) {
if (replaceThen) {
typeCast.getOperand().replace(thenE);
thenE.replace(typeCast);
} else {
typeCast.getOperand().replace(elseE);
elseE.replace(typeCast);
}
return expression;
}
}
}
typeCast.getOperand().replace(element);
return typeCast;
}
private static boolean constructorIsCompatible(
PsiMethod constructor, List<ParameterChunk> params) {
final PsiParameterList parameterList = constructor.getParameterList();
final PsiParameter[] constructorParams = parameterList.getParameters();
if (constructorParams.length != params.size()) {
return false;
}
for (int i = 0; i < constructorParams.length; i++) {
if (!TypeConversionUtil.isAssignable(
constructorParams[i].getType(), params.get(i).parameter.type)) {
return false;
}
}
return true;
}
public static String checkReturnType(
PsiMethodReferenceExpression expression,
JavaResolveResult result,
PsiType functionalInterfaceType) {
final PsiElement resolve = result.getElement();
if (resolve instanceof PsiMethod) {
final PsiClass containingClass = ((PsiMethod) resolve).getContainingClass();
LOG.assertTrue(containingClass != null);
PsiSubstitutor subst = result.getSubstitutor();
PsiClass qContainingClass = getQualifierResolveResult(expression).getContainingClass();
if (qContainingClass != null
&& isReceiverType(functionalInterfaceType, containingClass, (PsiMethod) resolve)) {
subst = TypeConversionUtil.getClassSubstitutor(containingClass, qContainingClass, subst);
LOG.assertTrue(subst != null);
}
final PsiType interfaceReturnType =
LambdaUtil.getFunctionalInterfaceReturnType(functionalInterfaceType);
PsiType returnType =
PsiTypesUtil.patchMethodGetClassReturnType(
expression,
expression,
(PsiMethod) resolve,
null,
PsiUtil.getLanguageLevel(expression));
if (returnType == null) {
returnType = ((PsiMethod) resolve).getReturnType();
}
PsiType methodReturnType = subst.substitute(returnType);
if (interfaceReturnType != null && interfaceReturnType != PsiType.VOID) {
if (methodReturnType == null) {
methodReturnType =
JavaPsiFacade.getElementFactory(expression.getProject())
.createType(containingClass, subst);
}
if (!TypeConversionUtil.isAssignable(interfaceReturnType, methodReturnType, false)) {
return "Bad return type in method reference: cannot convert "
+ methodReturnType.getCanonicalText()
+ " to "
+ interfaceReturnType.getCanonicalText();
}
}
}
return null;
}
public static boolean isAssignableWithoutConversions(
@Nullable PsiType lType, @Nullable PsiType rType, @NotNull PsiElement context) {
if (lType == null || rType == null) return false;
if (rType == PsiType.NULL) {
return !(lType instanceof PsiPrimitiveType);
}
PsiManager manager = context.getManager();
GlobalSearchScope scope = context.getResolveScope();
if (rType instanceof GrTupleType && ((GrTupleType) rType).getComponentTypes().length == 0) {
if (lType instanceof PsiArrayType
|| InheritanceUtil.isInheritor(lType, JAVA_UTIL_LIST)
|| InheritanceUtil.isInheritor(lType, JAVA_UTIL_SET)) {
return true;
}
}
if (isClassType(rType, GROOVY_LANG_GSTRING) && lType.equalsToText(JAVA_LANG_STRING)) {
return true;
}
if (isNumericType(lType) && isNumericType(rType)) {
lType = unboxPrimitiveTypeWrapper(lType);
if (isClassType(lType, JAVA_MATH_BIG_DECIMAL)) lType = PsiType.DOUBLE;
rType = unboxPrimitiveTypeWrapper(rType);
if (isClassType(rType, JAVA_MATH_BIG_DECIMAL)) rType = PsiType.DOUBLE;
} else {
rType = boxPrimitiveType(rType, manager, scope);
lType = boxPrimitiveType(lType, manager, scope);
}
if (rType instanceof GrMapType || rType instanceof GrTupleType) {
Boolean result = isAssignableForNativeTypes(lType, (PsiClassType) rType, context);
if (result != null && result.booleanValue()) return true;
}
if (TypeConversionUtil.isAssignable(lType, rType)) {
return true;
}
return false;
}
public static Pair<PsiTypeParameter, PsiType> findTypeParameterWithBoundError(
final PsiTypeParameter[] typeParams,
final PsiSubstitutor substitutor,
final PsiElement context,
final boolean allowUncheckedConversion) {
nextTypeParam:
for (PsiTypeParameter typeParameter : typeParams) {
PsiType substituted = substitutor.substitute(typeParameter);
if (substituted == null) return null;
substituted = PsiUtil.captureToplevelWildcards(substituted, context);
PsiClassType[] extendsTypes = typeParameter.getExtendsListTypes();
for (PsiClassType type : extendsTypes) {
PsiType extendsType = substitutor.substitute(type);
if (substituted instanceof PsiWildcardType) {
if (((PsiWildcardType) substituted).isSuper()) {
continue;
}
final PsiType extendsBound = ((PsiWildcardType) substituted).getExtendsBound();
if (acceptExtendsBound(extendsType, extendsBound)) {
continue nextTypeParam;
}
} else if (substituted instanceof PsiIntersectionType) {
for (PsiType extendsBound : ((PsiIntersectionType) substituted).getConjuncts()) {
if (acceptExtendsBound(extendsType, extendsBound)) continue nextTypeParam;
}
} else if (substituted instanceof PsiCapturedWildcardType) {
final PsiType extendsBound = ((PsiCapturedWildcardType) substituted).getUpperBound();
if (acceptExtendsBound(extendsType, extendsBound)) {
continue nextTypeParam;
}
}
if (extendsType != null
&& !TypeConversionUtil.isAssignable(
extendsType, substituted, allowUncheckedConversion)) {
return Pair.create(typeParameter, extendsType);
}
}
}
return null;
}
static void addCollectConversion(
PsiReferenceExpression ref,
Collection<ExpectedTypeInfo> expectedTypes,
Consumer<LookupElement> consumer) {
final PsiExpression qualifier = ref.getQualifierExpression();
PsiType component =
qualifier == null
? null
: PsiUtil.substituteTypeParameter(
qualifier.getType(), JAVA_UTIL_STREAM_STREAM, 0, true);
if (component == null) return;
JavaPsiFacade facade = JavaPsiFacade.getInstance(ref.getProject());
GlobalSearchScope scope = ref.getResolveScope();
PsiClass list = facade.findClass(JAVA_UTIL_LIST, scope);
PsiClass set = facade.findClass(JAVA_UTIL_SET, scope);
if (facade.findClass(JAVA_UTIL_STREAM_COLLECTORS, scope) == null || list == null || set == null)
return;
boolean hasList = false;
boolean hasSet = false;
for (ExpectedTypeInfo info : expectedTypes) {
PsiType type = info.getDefaultType();
PsiClass expectedClass = PsiUtil.resolveClassInClassTypeOnly(type);
PsiType expectedComponent = PsiUtil.extractIterableTypeParameter(type, true);
if (expectedClass == null
|| expectedComponent == null
|| !TypeConversionUtil.isAssignable(expectedComponent, component)) continue;
if (!hasList && InheritanceUtil.isInheritorOrSelf(list, expectedClass, true)) {
hasList = true;
consumer.consume(new MyLookupElement("toList", type));
}
if (!hasSet && InheritanceUtil.isInheritorOrSelf(set, expectedClass, true)) {
hasSet = true;
consumer.consume(new MyLookupElement("toSet", type));
}
}
}
public static boolean isReceiverType(
PsiType receiverType, @Nullable PsiClass containingClass, PsiSubstitutor psiSubstitutor) {
if (containingClass != null) {
receiverType = getExpandedType(receiverType, containingClass);
}
final PsiClassType.ClassResolveResult resolveResult =
PsiUtil.resolveGenericsClassInType(receiverType);
final PsiClass receiverClass = resolveResult.getElement();
if (receiverClass != null && isReceiverType(receiverClass, containingClass)) {
if (emptyOrRaw(containingClass, psiSubstitutor)) {
return true;
}
final PsiSubstitutor derivedSubstitutor =
TypeConversionUtil.getClassSubstitutor(containingClass, receiverClass, psiSubstitutor);
return derivedSubstitutor != null
&& TypeConversionUtil.isAssignable(
JavaPsiFacade.getElementFactory(containingClass.getProject())
.createType(containingClass, derivedSubstitutor),
receiverType);
}
return false;
}
@Nullable
public PsiType fun(GrReferenceExpressionImpl refExpr) {
PsiType result = GrReassignedLocalVarsChecker.checkReassignedVar(refExpr, true);
if (result != null) return result;
if (GrUnresolvedAccessInspection.isClassReference(refExpr)) {
GrExpression qualifier = refExpr.getQualifier();
LOG.assertTrue(qualifier != null);
return TypesUtil.createJavaLangClassType(
qualifier.getType(), refExpr.getProject(), refExpr.getResolveScope());
}
final PsiElement resolved = refExpr.resolve();
final PsiType inferred = getInferredTypes(refExpr, resolved);
final PsiType nominal = refExpr.getNominalType();
if (inferred == null || PsiType.NULL.equals(inferred)) {
if (nominal == null) {
// inside nested closure we could still try to infer from variable initializer. Not sound,
// but makes sense
if (resolved instanceof GrVariable) {
LOG.assertTrue(resolved.isValid());
return ((GrVariable) resolved).getTypeGroovy();
}
}
return nominal;
}
if (nominal == null) return inferred;
if (!TypeConversionUtil.isAssignable(TypeConversionUtil.erasure(nominal), inferred, false)) {
if (resolved instanceof GrVariable
&& ((GrVariable) resolved).getTypeElementGroovy() != null) {
return nominal;
}
}
return inferred;
}
private Specifics isMoreSpecific(
@NotNull MethodCandidateInfo info1,
@NotNull MethodCandidateInfo info2,
@MethodCandidateInfo.ApplicabilityLevelConstant int applicabilityLevel,
@NotNull LanguageLevel languageLevel) {
PsiMethod method1 = info1.getElement();
PsiMethod method2 = info2.getElement();
final PsiClass class1 = method1.getContainingClass();
final PsiClass class2 = method2.getContainingClass();
final PsiParameter[] params1 = method1.getParameterList().getParameters();
final PsiParameter[] params2 = method2.getParameterList().getParameters();
final PsiTypeParameter[] typeParameters1 = method1.getTypeParameters();
final PsiTypeParameter[] typeParameters2 = method2.getTypeParameters();
final PsiSubstitutor classSubstitutor1 =
info1.getSubstitutor(false); // substitutions for method type parameters will be ignored
final PsiSubstitutor classSubstitutor2 = info2.getSubstitutor(false);
final int max = Math.max(params1.length, params2.length);
PsiType[] types1 = PsiType.createArray(max);
PsiType[] types2 = PsiType.createArray(max);
final boolean varargsPosition =
applicabilityLevel == MethodCandidateInfo.ApplicabilityLevel.VARARGS;
for (int i = 0; i < max; i++) {
ProgressManager.checkCanceled();
PsiType type1 =
params1.length > 0 ? params1[Math.min(i, params1.length - 1)].getType() : null;
PsiType type2 =
params2.length > 0 ? params2[Math.min(i, params2.length - 1)].getType() : null;
if (varargsPosition) {
if (type1 instanceof PsiEllipsisType
&& type2 instanceof PsiEllipsisType
&& params1.length == params2.length
&& class1 != null
&& (!JavaVersionService.getInstance().isAtLeast(class1, JavaSdkVersion.JDK_1_7)
|| ((PsiArrayType) type1)
.getComponentType()
.equalsToText(CommonClassNames.JAVA_LANG_OBJECT)
|| ((PsiArrayType) type2)
.getComponentType()
.equalsToText(CommonClassNames.JAVA_LANG_OBJECT))) {
type1 = ((PsiEllipsisType) type1).toArrayType();
type2 = ((PsiEllipsisType) type2).toArrayType();
} else {
type1 =
type1 instanceof PsiEllipsisType ? ((PsiArrayType) type1).getComponentType() : type1;
type2 =
type2 instanceof PsiEllipsisType ? ((PsiArrayType) type2).getComponentType() : type2;
}
}
types1[i] = type1;
types2[i] = type2;
}
boolean sameBoxing = true;
int[] boxingHappened = new int[2];
for (int i = 0; i < types1.length; i++) {
ProgressManager.checkCanceled();
PsiType type1 = classSubstitutor1.substitute(types1[i]);
PsiType type2 = classSubstitutor2.substitute(types2[i]);
PsiType argType = i < getActualParameterTypes().length ? getActualParameterTypes()[i] : null;
boolean boxingInFirst = false;
if (isBoxingHappened(argType, type1, languageLevel)) {
boxingHappened[0] += 1;
boxingInFirst = true;
}
boolean boxingInSecond = false;
if (isBoxingHappened(argType, type2, languageLevel)) {
boxingHappened[1] += 1;
boxingInSecond = true;
}
sameBoxing &= boxingInFirst == boxingInSecond;
}
if (boxingHappened[0] == 0 && boxingHappened[1] > 0) return Specifics.FIRST;
if (boxingHappened[0] > 0 && boxingHappened[1] == 0) return Specifics.SECOND;
if (sameBoxing) {
final PsiSubstitutor siteSubstitutor1 = info1.getSiteSubstitutor();
final PsiSubstitutor siteSubstitutor2 = info2.getSiteSubstitutor();
final PsiType[] types2AtSite = typesAtSite(types2, siteSubstitutor2);
final PsiType[] types1AtSite = typesAtSite(types1, siteSubstitutor1);
final PsiSubstitutor methodSubstitutor1 =
calculateMethodSubstitutor(
typeParameters1, method1, siteSubstitutor1, types1, types2AtSite, languageLevel);
boolean applicable12 =
isApplicableTo(
types2AtSite, method1, languageLevel, varargsPosition, methodSubstitutor1, method2);
final PsiSubstitutor methodSubstitutor2 =
calculateMethodSubstitutor(
typeParameters2, method2, siteSubstitutor2, types2, types1AtSite, languageLevel);
boolean applicable21 =
isApplicableTo(
types1AtSite, method2, languageLevel, varargsPosition, methodSubstitutor2, method1);
if (!myLanguageLevel.isAtLeast(LanguageLevel.JDK_1_8)) {
final boolean typeArgsApplicable12 =
GenericsUtil.isTypeArgumentsApplicable(
typeParameters1, methodSubstitutor1, myArgumentsList, !applicable21);
final boolean typeArgsApplicable21 =
GenericsUtil.isTypeArgumentsApplicable(
typeParameters2, methodSubstitutor2, myArgumentsList, !applicable12);
if (!typeArgsApplicable12) {
applicable12 = false;
}
if (!typeArgsApplicable21) {
applicable21 = false;
}
}
if (applicable12 || applicable21) {
if (applicable12 && !applicable21) return Specifics.SECOND;
if (applicable21 && !applicable12) return Specifics.FIRST;
final boolean abstract1 = method1.hasModifierProperty(PsiModifier.ABSTRACT);
final boolean abstract2 = method2.hasModifierProperty(PsiModifier.ABSTRACT);
if (abstract1 && !abstract2) {
return Specifics.SECOND;
}
if (abstract2 && !abstract1) {
return Specifics.FIRST;
}
}
if (languageLevel.isAtLeast(LanguageLevel.JDK_1_8)
&& myArgumentsList instanceof PsiExpressionList
&& (typeParameters1.length == 0 || typeParameters2.length == 0)) {
boolean toCompareFunctional = false;
if (types1.length > 0 && types2.length > 0) {
for (int i = 0; i < getActualParametersLength(); i++) {
final PsiType type1 = types1[Math.min(i, types1.length - 1)];
final PsiType type2 = types2[Math.min(i, types2.length - 1)];
// from 15.12.2.5 Choosing the Most Specific Method
// In addition, a functional interface type S is more specific than a functional
// interface type T for an expression exp
// if T is not a subtype of S and one of the following conditions apply.
if (LambdaUtil.isFunctionalType(type1)
&& !TypeConversionUtil.erasure(type1).isAssignableFrom(type2)
&& LambdaUtil.isFunctionalType(type2)
&& !TypeConversionUtil.erasure(type2).isAssignableFrom(type1)) {
types1AtSite[Math.min(i, types1.length - 1)] = PsiType.NULL;
types2AtSite[Math.min(i, types2.length - 1)] = PsiType.NULL;
toCompareFunctional = true;
}
}
}
if (toCompareFunctional) {
final boolean applicable12ignoreFunctionalType =
isApplicableTo(
types2AtSite,
method1,
languageLevel,
varargsPosition,
calculateMethodSubstitutor(
typeParameters1,
method1,
siteSubstitutor1,
types1,
types2AtSite,
languageLevel),
null);
final boolean applicable21ignoreFunctionalType =
isApplicableTo(
types1AtSite,
method2,
languageLevel,
varargsPosition,
calculateMethodSubstitutor(
typeParameters2,
method2,
siteSubstitutor2,
types2,
types1AtSite,
languageLevel),
null);
if (applicable12ignoreFunctionalType || applicable21ignoreFunctionalType) {
Specifics specifics = null;
for (int i = 0; i < getActualParametersLength(); i++) {
if (types1AtSite[Math.min(i, types1.length - 1)] == PsiType.NULL
&& types2AtSite[Math.min(i, types2.length - 1)] == PsiType.NULL) {
Specifics specific =
isFunctionalTypeMoreSpecific(
info1, info2, ((PsiExpressionList) myArgumentsList).getExpressions()[i], i);
if (specific == Specifics.NEITHER) {
specifics = Specifics.NEITHER;
break;
}
if (specifics == null) {
specifics = specific;
} else if (specifics != specific) {
specifics = Specifics.NEITHER;
break;
}
}
}
if (!applicable12ignoreFunctionalType && applicable21ignoreFunctionalType) {
return specifics == Specifics.FIRST ? Specifics.FIRST : Specifics.NEITHER;
}
if (!applicable21ignoreFunctionalType && applicable12ignoreFunctionalType) {
return specifics == Specifics.SECOND ? Specifics.SECOND : Specifics.NEITHER;
}
return specifics;
}
}
}
} else if (varargsPosition) {
final PsiType lastParamType1 = classSubstitutor1.substitute(types1[types1.length - 1]);
final PsiType lastParamType2 = classSubstitutor2.substitute(types2[types1.length - 1]);
final boolean assignable1 = TypeConversionUtil.isAssignable(lastParamType2, lastParamType1);
final boolean assignable2 = TypeConversionUtil.isAssignable(lastParamType1, lastParamType2);
if (assignable1 && !assignable2) {
return Specifics.FIRST;
}
if (assignable2 && !assignable1) {
return Specifics.SECOND;
}
}
if (class1 != class2) {
if (class2.isInheritor(class1, true) || class1.isInterface() && !class2.isInterface()) {
if (MethodSignatureUtil.isSubsignature(
method1.getSignature(info1.getSubstitutor(false)),
method2.getSignature(info2.getSubstitutor(false)))) {
return Specifics.SECOND;
} else if (method1.hasModifierProperty(PsiModifier.STATIC)
&& method2.hasModifierProperty(PsiModifier.STATIC)
&& boxingHappened[0] == 0) {
return Specifics.SECOND;
}
} else if (MethodSignatureUtil.areErasedParametersEqual(
method1.getSignature(PsiSubstitutor.EMPTY),
method2.getSignature(PsiSubstitutor.EMPTY))
&& MethodSignatureUtil.isSubsignature(
method2.getSignature(info2.getSubstitutor(false)),
method1.getSignature(info1.getSubstitutor(false)))) {
return Specifics.FIRST;
} else if (class1.isInheritor(class2, true) || class2.isInterface()) {
if (method1.hasModifierProperty(PsiModifier.STATIC)
&& method2.hasModifierProperty(PsiModifier.STATIC)
&& boxingHappened[0] == 0) {
return Specifics.FIRST;
}
}
}
final boolean raw1 = PsiUtil.isRawSubstitutor(method1, classSubstitutor1);
final boolean raw2 = PsiUtil.isRawSubstitutor(method2, classSubstitutor2);
if (raw1 ^ raw2) {
return raw1 ? Specifics.SECOND : Specifics.FIRST;
}
final boolean varargs1 = info1.isVarargs();
final boolean varargs2 = info2.isVarargs();
if (varargs1 ^ varargs2) {
return varargs1 ? Specifics.SECOND : Specifics.FIRST;
}
return Specifics.NEITHER;
}
protected void checkSameSignatures(@NotNull List<CandidateInfo> conflicts) {
// candidates should go in order of class hierarchy traversal
// in order for this to work
Map<MethodSignature, CandidateInfo> signatures =
new THashMap<MethodSignature, CandidateInfo>(conflicts.size());
Set<PsiMethod> superMethods = new HashSet<PsiMethod>();
for (CandidateInfo conflict : conflicts) {
final PsiMethod method = ((MethodCandidateInfo) conflict).getElement();
for (HierarchicalMethodSignature methodSignature :
method.getHierarchicalMethodSignature().getSuperSignatures()) {
final PsiMethod superMethod = methodSignature.getMethod();
final PsiClass aClass = superMethod.getContainingClass();
if (aClass != null
&& !CommonClassNames.JAVA_LANG_OBJECT.equals(aClass.getQualifiedName())) {
superMethods.add(superMethod);
}
}
}
nextConflict:
for (int i = 0; i < conflicts.size(); i++) {
ProgressManager.checkCanceled();
CandidateInfo info = conflicts.get(i);
PsiMethod method = (PsiMethod) info.getElement();
if (!method.hasModifierProperty(PsiModifier.STATIC) && superMethods.contains(method)) {
conflicts.remove(i);
i--;
continue;
}
PsiClass class1 = method.getContainingClass();
PsiSubstitutor infoSubstitutor = ((MethodCandidateInfo) info).getSubstitutor(false);
MethodSignature signature = method.getSignature(infoSubstitutor);
CandidateInfo existing = signatures.get(signature);
if (existing == null) {
signatures.put(signature, info);
continue;
}
PsiMethod existingMethod = (PsiMethod) existing.getElement();
PsiClass existingClass = existingMethod.getContainingClass();
if (class1 != null
&& existingClass != null) { // prefer interface methods to methods from Object
if (class1.isInterface()
&& CommonClassNames.JAVA_LANG_OBJECT.equals(existingClass.getQualifiedName())) {
signatures.put(signature, info);
continue;
} else if (existingClass.isInterface()
&& CommonClassNames.JAVA_LANG_OBJECT.equals(class1.getQualifiedName())) {
conflicts.remove(info);
i--;
continue;
}
}
if (method == existingMethod) {
PsiElement scope1 = info.getCurrentFileResolveScope();
PsiElement scope2 = existing.getCurrentFileResolveScope();
if (scope1 instanceof PsiClass
&& scope2 instanceof PsiClass
&& PsiTreeUtil.isAncestor(scope1, scope2, true)
&& !existing
.isAccessible()) { // prefer methods from outer class to inaccessible base class
// methods
signatures.put(signature, info);
continue;
}
}
// filter out methods with incorrect inferred bounds (for unrelated methods only)
boolean existingTypeParamAgree = areTypeParametersAgree(existing);
boolean infoTypeParamAgree = areTypeParametersAgree(info);
if (existingTypeParamAgree
&& !infoTypeParamAgree
&& !PsiSuperMethodImplUtil.isSuperMethodSmart(method, existingMethod)) {
conflicts.remove(i);
i--;
continue;
}
if (!existingTypeParamAgree
&& infoTypeParamAgree
&& !PsiSuperMethodImplUtil.isSuperMethodSmart(existingMethod, method)) {
signatures.put(signature, info);
int index = conflicts.indexOf(existing);
conflicts.remove(index);
i--;
continue;
}
if (InheritanceUtil.isInheritorOrSelf(class1, existingClass, true)
|| InheritanceUtil.isInheritorOrSelf(existingClass, class1, true)) {
PsiParameter[] parameters = method.getParameterList().getParameters();
final PsiParameter[] existingParameters = existingMethod.getParameterList().getParameters();
for (int i1 = 0, parametersLength = parameters.length; i1 < parametersLength; i1++) {
if (parameters[i1].getType() instanceof PsiArrayType
&& !(existingParameters[i1].getType()
instanceof PsiArrayType)) { // prefer more specific type
signatures.put(signature, info);
continue nextConflict;
}
}
PsiType returnType1 = method.getReturnType();
PsiType returnType2 = existingMethod.getReturnType();
if (returnType1 != null && returnType2 != null) {
returnType1 = infoSubstitutor.substitute(returnType1);
returnType2 =
((MethodCandidateInfo) existing).getSubstitutor(false).substitute(returnType2);
if (!returnType1.equals(returnType2) && returnType1.isAssignableFrom(returnType2)) {
conflicts.remove(i);
i--;
continue;
}
}
// prefer derived class
signatures.put(signature, info);
} else {
final PsiMethodCallExpression methodCallExpression =
PsiTreeUtil.getParentOfType(myArgumentsList, PsiMethodCallExpression.class);
if (methodCallExpression != null) {
final PsiReferenceExpression expression = methodCallExpression.getMethodExpression();
final PsiExpression qualifierExpression = expression.getQualifierExpression();
PsiClass currentClass;
if (qualifierExpression != null) {
currentClass = PsiUtil.resolveClassInClassTypeOnly(qualifierExpression.getType());
} else {
currentClass = PsiTreeUtil.getParentOfType(expression, PsiClass.class);
}
if (currentClass != null && existingClass != null && class1 != null) {
final PsiSubstitutor eSubstitutor =
TypeConversionUtil.getMaybeSuperClassSubstitutor(
existingClass, currentClass, PsiSubstitutor.EMPTY, null);
final PsiSubstitutor cSubstitutor =
TypeConversionUtil.getMaybeSuperClassSubstitutor(
class1, currentClass, PsiSubstitutor.EMPTY, null);
if (eSubstitutor != null
&& cSubstitutor != null
&& MethodSignatureUtil.areSignaturesEqual(
existingMethod.getSignature(eSubstitutor), method.getSignature(cSubstitutor))) {
final PsiType returnType = eSubstitutor.substitute(existingMethod.getReturnType());
final PsiType returnType1 = cSubstitutor.substitute(method.getReturnType());
if (returnType != null && returnType1 != null && !returnType1.equals(returnType)) {
if (TypeConversionUtil.isAssignable(returnType, returnType1, false)) {
if (class1.isInterface() && !existingClass.isInterface()) continue;
conflicts.remove(existing);
} else {
if (!TypeConversionUtil.isAssignable(returnType1, returnType, false)) continue;
conflicts.remove(i);
}
i--;
break;
}
}
}
}
}
}
}
/** @return true if values of type {@code type} can be assigned to rvalues of this type. */
public boolean isAssignableFrom(@NotNull PsiType type) {
return TypeConversionUtil.isAssignable(this, type);
}