public static boolean isClassEquivalentTo(@NotNull PsiClass aClass, PsiElement another) {
if (aClass == another) return true;
if (!(another instanceof PsiClass)) return false;
String name1 = aClass.getName();
if (name1 == null) return false;
if (!another.isValid()) return false;
String name2 = ((PsiClass) another).getName();
if (name2 == null) return false;
if (name1.hashCode() != name2.hashCode()) return false;
if (!name1.equals(name2)) return false;
String qName1 = aClass.getQualifiedName();
String qName2 = ((PsiClass) another).getQualifiedName();
if (qName1 == null || qName2 == null) {
//noinspection StringEquality
if (qName1 != qName2) return false;
if (aClass instanceof PsiTypeParameter && another instanceof PsiTypeParameter) {
PsiTypeParameter p1 = (PsiTypeParameter) aClass;
PsiTypeParameter p2 = (PsiTypeParameter) another;
return p1.getIndex() == p2.getIndex()
&& aClass.getManager().areElementsEquivalent(p1.getOwner(), p2.getOwner());
} else {
return false;
}
}
if (qName1.hashCode() != qName2.hashCode() || !qName1.equals(qName2)) {
return false;
}
if (originalElement(aClass).equals(originalElement((PsiClass) another))) {
return true;
}
final PsiFile file1 = aClass.getContainingFile().getOriginalFile();
final PsiFile file2 = another.getContainingFile().getOriginalFile();
// see com.intellij.openapi.vcs.changes.PsiChangeTracker
// see com.intellij.psi.impl.PsiFileFactoryImpl#createFileFromText(CharSequence,PsiFile)
final PsiFile original1 = file1.getUserData(PsiFileFactory.ORIGINAL_FILE);
final PsiFile original2 = file2.getUserData(PsiFileFactory.ORIGINAL_FILE);
if (original1 == original2 && original1 != null
|| original1 == file2
|| original2 == file1
|| file1 == file2) {
return compareClassSeqNumber(aClass, (PsiClass) another);
}
final FileIndexFacade fileIndex =
ServiceManager.getService(file1.getProject(), FileIndexFacade.class);
final VirtualFile vfile1 = file1.getViewProvider().getVirtualFile();
final VirtualFile vfile2 = file2.getViewProvider().getVirtualFile();
boolean lib1 = fileIndex.isInLibraryClasses(vfile1);
boolean lib2 = fileIndex.isInLibraryClasses(vfile2);
return (fileIndex.isInSource(vfile1) || lib1) && (fileIndex.isInSource(vfile2) || lib2);
}
private JavaResolveResult advancedResolveImpl() {
final PsiElement resolve = resolveElement();
if (resolve instanceof PsiClass) {
final Map<PsiTypeParameter, PsiType> substitutionMap =
new HashMap<PsiTypeParameter, PsiType>();
int index = 0;
for (PsiTypeParameter parameter : PsiUtil.typeParametersIterable((PsiClass) resolve)) {
if (index >= myTypeParameters.length) {
final PsiTypeParameterListOwner parameterOwner = parameter.getOwner();
if (parameterOwner == resolve) {
substitutionMap.put(parameter, null);
} else if (parameterOwner instanceof PsiClass) {
PsiElement containingClass = myParent;
while ((containingClass =
PsiTreeUtil.getParentOfType(containingClass, PsiClass.class, true))
!= null) {
final PsiSubstitutor superClassSubstitutor =
TypeConversionUtil.getClassSubstitutor(
(PsiClass) parameterOwner, (PsiClass) containingClass, PsiSubstitutor.EMPTY);
if (superClassSubstitutor != null) {
substitutionMap.put(parameter, superClassSubstitutor.substitute(parameter));
break;
}
}
}
} else {
substitutionMap.put(parameter, myTypeParameters[index].getType());
}
index++;
}
return new CandidateInfo(resolve, PsiSubstitutorImpl.createSubstitutor(substitutionMap));
} else {
return new CandidateInfo(resolve, PsiSubstitutor.EMPTY);
}
}
private static void findTypeParameterExternalUsages(
final PsiTypeParameter typeParameter, final Collection<UsageInfo> usages) {
PsiTypeParameterListOwner owner = typeParameter.getOwner();
if (owner != null) {
final PsiTypeParameterList parameterList = owner.getTypeParameterList();
if (parameterList != null) {
final int paramsCount = parameterList.getTypeParameters().length;
final int index = parameterList.getTypeParameterIndex(typeParameter);
ReferencesSearch.search(owner)
.forEach(
reference -> {
if (reference instanceof PsiJavaCodeReferenceElement) {
final PsiReferenceParameterList parameterList1 =
((PsiJavaCodeReferenceElement) reference).getParameterList();
if (parameterList1 != null) {
PsiTypeElement[] typeArgs = parameterList1.getTypeParameterElements();
if (typeArgs.length > index) {
if (typeArgs.length == 1
&& paramsCount > 1
&& typeArgs[0].getType() instanceof PsiDiamondType) return true;
usages.add(
new SafeDeleteReferenceJavaDeleteUsageInfo(
typeArgs[index], typeParameter, true));
}
}
}
return true;
});
}
}
}
public String toString() {
@NonNls StringBuilder buffer = new StringBuilder();
final Set<Map.Entry<PsiTypeParameter, PsiType>> set = mySubstitutionMap.entrySet();
for (Map.Entry<PsiTypeParameter, PsiType> entry : set) {
final PsiTypeParameter typeParameter = entry.getKey();
buffer.append(typeParameter.getName());
final PsiElement owner = typeParameter.getOwner();
if (owner instanceof PsiClass) {
buffer.append(" of ");
buffer.append(((PsiClass) owner).getQualifiedName());
} else if (owner instanceof PsiMethod) {
buffer.append(" of ");
buffer.append(((PsiMethod) owner).getName());
buffer.append(" in ");
buffer.append(((PsiMethod) owner).getContainingClass().getQualifiedName());
}
buffer.append(" -> ");
if (entry.getValue() != null) {
buffer.append(entry.getValue().getCanonicalText());
} else {
buffer.append("null");
}
buffer.append('\n');
}
return buffer.toString();
}
@Nullable
public static PsiType getSubstitutedType(@Nullable PsiParameter parameter) {
if (parameter == null) return null;
final PsiType type = getType(parameter);
if (type instanceof PsiArrayType) {
return type;
}
final PsiClassType.ClassResolveResult result = PsiUtil.resolveGenericsClassInType(type);
final PsiClass psiClass = result.getElement();
if (psiClass == null) return type;
final Set<PsiTypeParameter> usedTypeParameters = new HashSet<PsiTypeParameter>();
RefactoringUtil.collectTypeParameters(usedTypeParameters, parameter);
for (Iterator<PsiTypeParameter> iterator = usedTypeParameters.iterator();
iterator.hasNext(); ) {
PsiTypeParameter usedTypeParameter = iterator.next();
if (parameter.getDeclarationScope() != usedTypeParameter.getOwner()) {
iterator.remove();
}
}
PsiSubstitutor subst = PsiSubstitutor.EMPTY;
for (PsiTypeParameter usedTypeParameter : usedTypeParameters) {
subst =
subst.put(usedTypeParameter, TypeConversionUtil.typeParameterErasure(usedTypeParameter));
}
PsiSubstitutor substitutor = PsiSubstitutor.EMPTY;
final Map<PsiTypeParameter, PsiType> typeMap = result.getSubstitutor().getSubstitutionMap();
for (PsiTypeParameter typeParameter : typeMap.keySet()) {
final PsiType psiType = typeMap.get(typeParameter);
substitutor =
substitutor.put(typeParameter, psiType != null ? subst.substitute(psiType) : null);
}
if (psiClass instanceof PsiTypeParameter) {
return subst.substitute((PsiTypeParameter) psiClass);
} else {
return JavaPsiFacade.getElementFactory(parameter.getProject())
.createType(psiClass, substitutor);
}
}
@NotNull
private static PsiSubstitutor calculateMethodSubstitutor(
@NotNull PsiTypeParameter[] typeParameters,
@NotNull PsiMethod method,
@NotNull PsiSubstitutor siteSubstitutor,
@NotNull PsiType[] types1,
@NotNull PsiType[] types2,
@NotNull LanguageLevel languageLevel) {
PsiSubstitutor substitutor =
PsiResolveHelper.SERVICE
.getInstance(method.getProject())
.inferTypeArguments(typeParameters, types1, types2, languageLevel);
for (PsiTypeParameter typeParameter : PsiUtil.typeParametersIterable(method)) {
ProgressManager.checkCanceled();
LOG.assertTrue(typeParameter != null);
if (!substitutor.getSubstitutionMap().containsKey(typeParameter)) {
PsiType type = siteSubstitutor.substitute(typeParameter);
if (type instanceof PsiClassType && typeParameter.getOwner() == method) {
final PsiClass aClass = ((PsiClassType) type).resolve();
if (aClass instanceof PsiTypeParameter
&& ((PsiTypeParameter) aClass).getOwner() == method) {
type = TypeConversionUtil.erasure(type, siteSubstitutor);
}
}
substitutor = substitutor.put(typeParameter, type);
} else {
final PsiType type = substitutor.substitute(typeParameter);
if (type instanceof PsiClassType) {
final PsiClass aClass = ((PsiClassType) type).resolve();
if (aClass instanceof PsiTypeParameter) {
substitutor =
substitutor.put(
typeParameter,
JavaPsiFacade.getElementFactory(aClass.getProject())
.createType(aClass, siteSubstitutor));
}
}
}
}
return substitutor;
}