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;
});
}
}
}
private static boolean shouldInsertParentheses(PsiClass psiClass, PsiElement position) {
final PsiJavaCodeReferenceElement ref =
PsiTreeUtil.getParentOfType(position, PsiJavaCodeReferenceElement.class);
if (ref == null) {
return false;
}
final PsiReferenceParameterList parameterList = ref.getParameterList();
if (parameterList != null && parameterList.getTextLength() > 0) {
return false;
}
final PsiElement prevElement = FilterPositionUtil.searchNonSpaceNonCommentBack(ref);
if (prevElement != null && prevElement.getParent() instanceof PsiNewExpression) {
Set<PsiType> expectedTypes = new HashSet<PsiType>();
for (ExpectedTypeInfo info :
ExpectedTypesProvider.getExpectedTypes((PsiExpression) prevElement.getParent(), true)) {
expectedTypes.add(info.getType());
}
return JavaCompletionUtil.isDefinitelyExpected(psiClass, expectedTypes, position);
}
return false;
}
protected PsiType processLocalVariableInitializer(PsiExpression initializer) {
PsiType result = null;
if (null != initializer && !(initializer instanceof PsiArrayInitializerExpression)) {
if (!recursionBreaker.get().contains(initializer)) {
recursionBreaker.get().add(initializer);
try {
result = initializer.getType();
} finally {
recursionBreaker.get().remove(initializer);
}
if (initializer instanceof PsiNewExpression) {
final PsiJavaCodeReferenceElement reference =
((PsiNewExpression) initializer).getClassOrAnonymousClassReference();
if (reference != null) {
final PsiReferenceParameterList parameterList = reference.getParameterList();
if (parameterList != null) {
final PsiTypeElement[] elements = parameterList.getTypeParameterElements();
if (elements.length == 1 && elements[0].getType() instanceof PsiDiamondType) {
result = TypeConversionUtil.erasure(result);
}
}
}
}
}
}
return result;
}
@Nullable
static Pair<PsiClass, Integer> getTypeParameterInfo(PsiElement context) {
final PsiReferenceParameterList parameterList =
PsiTreeUtil.getContextOfType(context, PsiReferenceParameterList.class, true);
if (parameterList == null) return null;
PsiElement parent = parameterList.getParent();
if (!(parent instanceof PsiJavaCodeReferenceElement)) return null;
final PsiJavaCodeReferenceElement referenceElement = (PsiJavaCodeReferenceElement) parent;
final int parameterIndex;
int index = 0;
final PsiTypeElement typeElement =
PsiTreeUtil.getContextOfType(context, PsiTypeElement.class, true);
if (typeElement != null) {
final PsiTypeElement[] elements =
referenceElement.getParameterList().getTypeParameterElements();
while (index < elements.length) {
final PsiTypeElement element = elements[index++];
if (element == typeElement) break;
}
}
parameterIndex = index - 1;
if (parameterIndex < 0) return null;
final PsiElement target = referenceElement.resolve();
if (!(target instanceof PsiClass)) return null;
final PsiClass referencedClass = (PsiClass) target;
final PsiTypeParameter[] typeParameters = referencedClass.getTypeParameters();
if (typeParameters.length <= parameterIndex) return null;
return Pair.create(referencedClass, parameterIndex);
}
private static boolean changeClassTypeArgument(
PsiMethod myMethod,
Project project,
PsiType superReturnType,
PsiClass superClass,
Editor editor,
PsiType returnType) {
if (superClass == null || !superClass.hasTypeParameters()) return true;
final PsiClass superReturnTypeClass = PsiUtil.resolveClassInType(superReturnType);
if (superReturnTypeClass == null
|| !(superReturnTypeClass instanceof PsiTypeParameter
|| superReturnTypeClass.hasTypeParameters())) return true;
final PsiClass derivedClass = myMethod.getContainingClass();
if (derivedClass == null) return true;
final PsiReferenceParameterList referenceParameterList =
findTypeArgumentsList(superClass, derivedClass);
if (referenceParameterList == null) return true;
final PsiElement resolve =
((PsiJavaCodeReferenceElement) referenceParameterList.getParent()).resolve();
if (!(resolve instanceof PsiClass)) return true;
final PsiClass baseClass = (PsiClass) resolve;
if (returnType instanceof PsiPrimitiveType) {
returnType = ((PsiPrimitiveType) returnType).getBoxedType(derivedClass);
}
final PsiSubstitutor superClassSubstitutor =
TypeConversionUtil.getSuperClassSubstitutor(superClass, baseClass, PsiSubstitutor.EMPTY);
final PsiType superReturnTypeInBaseClassType =
superClassSubstitutor.substitute(superReturnType);
final PsiResolveHelper resolveHelper = JavaPsiFacade.getInstance(project).getResolveHelper();
final PsiSubstitutor psiSubstitutor =
resolveHelper.inferTypeArguments(
PsiTypesUtil.filterUnusedTypeParameters(
superReturnTypeInBaseClassType, baseClass.getTypeParameters()),
new PsiType[] {superReturnTypeInBaseClassType},
new PsiType[] {returnType},
PsiUtil.getLanguageLevel(superClass));
final TypeMigrationRules rules = new TypeMigrationRules();
final PsiSubstitutor compoundSubstitutor =
TypeConversionUtil.getSuperClassSubstitutor(superClass, derivedClass, PsiSubstitutor.EMPTY)
.putAll(psiSubstitutor);
rules.setBoundScope(new LocalSearchScope(derivedClass));
TypeMigrationProcessor.runHighlightingTypeMigration(
project,
editor,
rules,
referenceParameterList,
JavaPsiFacade.getElementFactory(project).createType(baseClass, compoundSubstitutor));
return false;
}
@Override
public void beforeCompletion(@NotNull final CompletionInitializationContext context) {
final PsiFile file = context.getFile();
if (file instanceof PsiJavaFile) {
JavaCompletionUtil.initOffsets(file, context.getOffsetMap());
autoImport(file, context.getStartOffset() - 1, context.getEditor());
if (context.getCompletionType() == CompletionType.BASIC) {
if (semicolonNeeded(context.getEditor(), file, context.getStartOffset())) {
context.setDummyIdentifier(CompletionInitializationContext.DUMMY_IDENTIFIER.trim() + ";");
return;
}
final PsiJavaCodeReferenceElement ref =
PsiTreeUtil.findElementOfClassAtOffset(
file, context.getStartOffset(), PsiJavaCodeReferenceElement.class, false);
if (ref != null && !(ref instanceof PsiReferenceExpression)) {
if (ref.getParent() instanceof PsiTypeElement) {
context.setDummyIdentifier(
CompletionInitializationContext.DUMMY_IDENTIFIER.trim() + ";");
}
if (JavaSmartCompletionContributor.AFTER_NEW.accepts(ref)) {
final PsiReferenceParameterList paramList = ref.getParameterList();
if (paramList != null && paramList.getTextLength() > 0) {
context
.getOffsetMap()
.addOffset(
ConstructorInsertHandler.PARAM_LIST_START,
paramList.getTextRange().getStartOffset());
context
.getOffsetMap()
.addOffset(
ConstructorInsertHandler.PARAM_LIST_END,
paramList.getTextRange().getEndOffset());
}
}
return;
}
final PsiElement element = file.findElementAt(context.getStartOffset());
if (psiElement().inside(PsiAnnotation.class).accepts(element)) {
return;
}
context.setDummyIdentifier(CompletionInitializationContext.DUMMY_IDENTIFIER_TRIMMED);
}
}
}
public static boolean isDiamond(PsiType type) {
boolean diamond = false;
if (type instanceof PsiClassReferenceType) {
final PsiReferenceParameterList parameterList =
((PsiClassReferenceType) type).getReference().getParameterList();
if (parameterList != null) {
final PsiTypeElement[] typeParameterElements = parameterList.getTypeParameterElements();
diamond =
typeParameterElements.length == 1
&& typeParameterElements[0].getType() instanceof PsiDiamondType;
}
}
return diamond;
}
@NotNull
public static PsiType[] typesByReferenceParameterList(
@NotNull PsiReferenceParameterList parameterList) {
PsiTypeElement[] typeElements = parameterList.getTypeParameterElements();
return typesByTypeElements(typeElements);
}
@Override
public void applyFix(@NotNull Project project, @NotNull ProblemDescriptor descriptor) {
final PsiReferenceParameterList typeArgumentList =
(PsiReferenceParameterList) descriptor.getPsiElement();
if (!FileModificationService.getInstance().preparePsiElementForWrite(typeArgumentList))
return;
try {
final PsiMethodCallExpression expr =
(PsiMethodCallExpression)
JavaPsiFacade.getInstance(project)
.getElementFactory()
.createExpressionFromText("foo()", null);
typeArgumentList.replace(expr.getTypeArgumentList());
} catch (IncorrectOperationException e) {
LOG.error(e);
}
}
private void markTypeParameterUsages(
final PsiClass psiClass,
PsiClassType migrationType,
PsiReferenceParameterList referenceParameterList,
final Map<PsiElement, Pair<PsiReference[], PsiType>> roots) {
final PsiSubstitutor[] fullHierarchySubstitutor = {
migrationType.resolveGenerics().getSubstitutor()
};
RefactoringHierarchyUtil.processSuperTypes(
migrationType,
new RefactoringHierarchyUtil.SuperTypeVisitor() {
@Override
public void visitType(PsiType aType) {
fullHierarchySubstitutor[0] =
fullHierarchySubstitutor[0].putAll(
((PsiClassType) aType).resolveGenerics().getSubstitutor());
}
@Override
public void visitClass(PsiClass aClass) {
// do nothing
}
});
final PsiClass resolvedClass =
(PsiClass) ((PsiJavaCodeReferenceElement) referenceParameterList.getParent()).resolve();
;
LOG.assertTrue(resolvedClass != null);
final Set<PsiClass> superClasses = new HashSet<PsiClass>();
superClasses.add(resolvedClass);
InheritanceUtil.getSuperClasses(resolvedClass, superClasses, true);
for (PsiClass superSuperClass : superClasses) {
final TypeParameterSearcher parameterSearcher =
new TypeParameterSearcher(superSuperClass.getTypeParameters());
superSuperClass.accept(
new JavaRecursiveElementVisitor() {
@Override
public void visitMethod(final PsiMethod method) {
super.visitMethod(method);
processMemberType(
method, parameterSearcher, psiClass, fullHierarchySubstitutor[0], roots);
for (PsiParameter parameter : method.getParameterList().getParameters()) {
processMemberType(
parameter, parameterSearcher, psiClass, fullHierarchySubstitutor[0], roots);
}
}
@Override
public void visitField(final PsiField field) {
super.visitField(field);
processMemberType(
field, parameterSearcher, psiClass, fullHierarchySubstitutor[0], roots);
}
});
}
}
private static boolean isInExtendsList(
final RefJavaElement to, final PsiReferenceList extendsList) {
if (extendsList != null) {
final PsiJavaCodeReferenceElement[] referenceElements = extendsList.getReferenceElements();
for (PsiJavaCodeReferenceElement referenceElement : referenceElements) {
final PsiReferenceParameterList parameterList = referenceElement.getParameterList();
if (parameterList != null) {
for (PsiType type : parameterList.getTypeArguments()) {
if (extendsList
.getManager()
.areElementsEquivalent(PsiUtil.resolveClassInType(type), to.getElement())) {
return true;
}
}
}
}
}
return false;
}
@Override
public void visitReferenceParameterList(PsiReferenceParameterList referenceParameterList) {
super.visitReferenceParameterList(referenceParameterList);
final PsiTypeElement[] typeParameterElements =
referenceParameterList.getTypeParameterElements();
if (typeParameterElements.length == 1) {
final PsiTypeElement typeParameterElement = typeParameterElements[0];
final PsiType type = typeParameterElement.getType();
if (type instanceof PsiDiamondType) {
final PsiNewExpression newExpression =
PsiTreeUtil.getParentOfType(referenceParameterList, PsiNewExpression.class);
if (newExpression != null) {
final List<PsiType> types =
PsiDiamondTypeImpl.resolveInferredTypesNoCheck(newExpression, newExpression)
.getInferredTypes();
if (!types.isEmpty()) {
registerError(referenceParameterList);
}
}
}
}
}
public TreeElement process(TreeElement element, boolean addImports, boolean uncompleteCode) {
IElementType elementType = element.getElementType();
if (elementType == JavaElementType.JAVA_CODE_REFERENCE
|| elementType == JavaElementType.REFERENCE_EXPRESSION) {
final IElementType parentElementType = element.getTreeParent().getElementType();
if (elementType == JavaElementType.JAVA_CODE_REFERENCE
|| parentElementType == JavaElementType.REFERENCE_EXPRESSION
|| parentElementType == JavaElementType.METHOD_REF_EXPRESSION
|| uncompleteCode) {
final PsiJavaCodeReferenceElement ref =
(PsiJavaCodeReferenceElement) SourceTreeToPsiMap.treeElementToPsi(element);
final PsiReferenceParameterList parameterList = ref.getParameterList();
if (parameterList != null) {
final PsiTypeElement[] typeParameters = parameterList.getTypeParameterElements();
for (PsiTypeElement typeParameter : typeParameters) {
process(
(TreeElement) SourceTreeToPsiMap.psiElementToTree(typeParameter),
addImports,
uncompleteCode);
}
}
boolean rightKind = true;
if (elementType == JavaElementType.JAVA_CODE_REFERENCE) {
int kind = ((PsiJavaCodeReferenceElementImpl) element).getKind();
rightKind =
kind == PsiJavaCodeReferenceElementImpl.CLASS_NAME_KIND
|| kind == PsiJavaCodeReferenceElementImpl.CLASS_OR_PACKAGE_NAME_KIND;
}
if (rightKind) {
boolean isInsideDocComment =
TreeUtil.findParent(element, JavaDocElementType.DOC_COMMENT) != null;
boolean isShort = !((SourceJavaCodeReference) element).isQualified();
if (!makeFQ(isInsideDocComment)) {
if (isShort) return element; // short name already, no need to change
}
PsiElement refElement;
if (!uncompleteCode) {
refElement = ref.resolve();
} else {
PsiResolveHelper helper =
JavaPsiFacade.getInstance(element.getManager().getProject()).getResolveHelper();
refElement =
helper.resolveReferencedClass(
((SourceJavaCodeReference) element).getClassNameText(),
SourceTreeToPsiMap.treeElementToPsi(element));
}
if (refElement instanceof PsiClass) {
if (makeFQ(isInsideDocComment)) {
String qName = ((PsiClass) refElement).getQualifiedName();
if (qName == null) return element;
PsiImportHolder file =
(PsiImportHolder)
SourceTreeToPsiMap.treeElementToPsi(element).getContainingFile();
if (file instanceof PsiJavaFile
&& ImportHelper.isImplicitlyImported(qName, (PsiJavaFile) file)) {
if (isShort) return element;
return (TreeElement)
makeShortReference(
(CompositeElement) element, (PsiClass) refElement, addImports);
}
if (file instanceof PsiJavaFile) {
String thisPackageName = ((PsiJavaFile) file).getPackageName();
if (ImportHelper.hasPackage(qName, thisPackageName)) {
if (!isShort) {
return (TreeElement)
makeShortReference(
(CompositeElement) element, (PsiClass) refElement, addImports);
}
}
}
return (TreeElement) replaceReferenceWithFQ(element, (PsiClass) refElement);
} else {
int oldLength = element.getTextLength();
TreeElement treeElement =
(TreeElement)
makeShortReference(
(CompositeElement) element, (PsiClass) refElement, addImports);
if (treeElement.getTextLength() == oldLength
&& ((PsiClass) refElement).getContainingClass() != null) {
PsiElement qualifier = ref.getQualifier();
if (qualifier instanceof PsiJavaCodeReferenceElement
&& ((PsiJavaCodeReferenceElement) qualifier).resolve() instanceof PsiClass) {
process((TreeElement) qualifier.getNode(), addImports, uncompleteCode);
}
}
return treeElement;
}
}
}
}
}
for (TreeElement child = element.getFirstChildNode();
child != null;
child = child.getTreeNext()) {
child = process(child, addImports, uncompleteCode);
}
return element;
}
@Override
public ASTNode process(
@NotNull ASTNode element,
boolean addImports,
boolean incompleteCode,
boolean useFqInJavadoc,
boolean useFqInCode) {
IElementType elementType = element.getElementType();
if ((elementType == JavaElementType.JAVA_CODE_REFERENCE
|| elementType == JavaElementType.REFERENCE_EXPRESSION)
&& !isAnnotated(element)) {
IElementType parentType = element.getTreeParent().getElementType();
if (elementType == JavaElementType.JAVA_CODE_REFERENCE
|| incompleteCode
|| parentType == JavaElementType.REFERENCE_EXPRESSION
|| parentType == JavaElementType.METHOD_REF_EXPRESSION) {
PsiJavaCodeReferenceElement ref = (PsiJavaCodeReferenceElement) element.getPsi();
PsiReferenceParameterList parameterList = ref.getParameterList();
if (parameterList != null) {
PsiTypeElement[] typeParameters = parameterList.getTypeParameterElements();
for (PsiTypeElement typeParameter : typeParameters) {
process(
typeParameter.getNode(), addImports, incompleteCode, useFqInJavadoc, useFqInCode);
}
}
boolean rightKind = true;
if (elementType == JavaElementType.JAVA_CODE_REFERENCE) {
PsiJavaCodeReferenceElementImpl impl = (PsiJavaCodeReferenceElementImpl) element;
int kind = impl.getKind(impl.getContainingFile());
rightKind =
kind == PsiJavaCodeReferenceElementImpl.CLASS_NAME_KIND
|| kind == PsiJavaCodeReferenceElementImpl.CLASS_OR_PACKAGE_NAME_KIND;
}
if (rightKind) {
// annotations may jump out of reference (see PsiJavaCodeReferenceImpl#setAnnotations())
// so they should be processed first
List<PsiAnnotation> annotations =
PsiTreeUtil.getChildrenOfTypeAsList(ref, PsiAnnotation.class);
for (PsiAnnotation annotation : annotations) {
process(annotation.getNode(), addImports, incompleteCode, useFqInJavadoc, useFqInCode);
}
boolean isInsideDocComment =
TreeUtil.findParent(element, JavaDocElementType.DOC_COMMENT) != null;
boolean isShort = !ref.isQualified();
if (isInsideDocComment ? !useFqInJavadoc : !useFqInCode) {
if (isShort) return element; // short name already, no need to change
}
PsiElement refElement;
if (!incompleteCode) {
refElement = ref.resolve();
} else {
PsiResolveHelper helper =
JavaPsiFacade.getInstance(ref.getManager().getProject()).getResolveHelper();
final SourceJavaCodeReference reference = (SourceJavaCodeReference) element;
refElement = helper.resolveReferencedClass(reference.getClassNameText(), ref);
}
if (refElement instanceof PsiClass) {
PsiClass psiClass = (PsiClass) refElement;
if (isInsideDocComment ? useFqInJavadoc : useFqInCode) {
String qName = psiClass.getQualifiedName();
if (qName == null) return element;
PsiFile file = ref.getContainingFile();
if (file instanceof PsiJavaFile) {
if (ImportHelper.isImplicitlyImported(qName, (PsiJavaFile) file)) {
if (isShort) return element;
return makeShortReference((CompositeElement) element, psiClass, addImports);
}
String thisPackageName = ((PsiJavaFile) file).getPackageName();
if (ImportHelper.hasPackage(qName, thisPackageName)) {
if (!isShort) {
return makeShortReference((CompositeElement) element, psiClass, addImports);
}
}
}
return replaceReferenceWithFQ(element, psiClass);
} else {
int oldLength = element.getTextLength();
ASTNode treeElement =
makeShortReference((CompositeElement) element, psiClass, addImports);
if (treeElement.getTextLength() == oldLength
&& psiClass.getContainingClass() != null) {
PsiElement qualifier = ref.getQualifier();
if (qualifier instanceof PsiJavaCodeReferenceElement
&& ((PsiJavaCodeReferenceElement) qualifier).resolve() instanceof PsiClass) {
process(
qualifier.getNode(), addImports, incompleteCode, useFqInJavadoc, useFqInCode);
}
}
return treeElement;
}
}
}
}
}
for (ASTNode child = element.getFirstChildNode(); child != null; child = child.getTreeNext()) {
//noinspection AssignmentToForLoopParameter
child = process(child, addImports, incompleteCode, useFqInJavadoc, useFqInCode);
}
return element;
}
public static int insertClassReference(
PsiClass psiClass, PsiFile file, int startOffset, int endOffset) {
final Project project = file.getProject();
PsiDocumentManager documentManager = PsiDocumentManager.getInstance(project);
documentManager.commitAllDocuments();
final PsiManager manager = file.getManager();
final Document document =
FileDocumentManager.getInstance().getDocument(file.getViewProvider().getVirtualFile());
final PsiReference reference = file.findReferenceAt(startOffset);
if (reference != null) {
final PsiElement resolved = reference.resolve();
if (resolved instanceof PsiClass) {
if (((PsiClass) resolved).getQualifiedName() == null
|| manager.areElementsEquivalent(psiClass, resolved)) {
return endOffset;
}
}
}
String name = psiClass.getName();
if (name == null) {
return endOffset;
}
assert document != null;
document.replaceString(startOffset, endOffset, name);
int newEndOffset = startOffset + name.length();
final RangeMarker toDelete = insertTemporary(newEndOffset, document, " ");
documentManager.commitAllDocuments();
PsiElement element = file.findElementAt(startOffset);
if (element instanceof PsiIdentifier) {
PsiElement parent = element.getParent();
if (parent instanceof PsiJavaCodeReferenceElement
&& !((PsiJavaCodeReferenceElement) parent).isQualified()
&& !(parent.getParent() instanceof PsiPackageStatement)) {
PsiJavaCodeReferenceElement ref = (PsiJavaCodeReferenceElement) parent;
if (psiClass.isValid()
&& !psiClass.getManager().areElementsEquivalent(psiClass, resolveReference(ref))) {
final boolean staticImport = ref instanceof PsiImportStaticReferenceElement;
PsiElement newElement;
try {
newElement =
staticImport
? ((PsiImportStaticReferenceElement) ref).bindToTargetClass(psiClass)
: ref.bindToElement(psiClass);
} catch (IncorrectOperationException e) {
return endOffset; // can happen if fqn contains reserved words, for example
}
final RangeMarker rangeMarker = document.createRangeMarker(newElement.getTextRange());
documentManager.doPostponedOperationsAndUnblockDocument(document);
documentManager.commitDocument(document);
newElement =
CodeInsightUtilCore.findElementInRange(
file,
rangeMarker.getStartOffset(),
rangeMarker.getEndOffset(),
PsiJavaCodeReferenceElement.class,
JavaLanguage.INSTANCE);
rangeMarker.dispose();
if (newElement != null) {
newEndOffset = newElement.getTextRange().getEndOffset();
if (!(newElement instanceof PsiReferenceExpression)) {
PsiReferenceParameterList parameterList =
((PsiJavaCodeReferenceElement) newElement).getParameterList();
if (parameterList != null) {
newEndOffset = parameterList.getTextRange().getStartOffset();
}
}
if (!staticImport
&& !psiClass
.getManager()
.areElementsEquivalent(psiClass, resolveReference((PsiReference) newElement))
&& !PsiUtil.isInnerClass(psiClass)) {
final String qName = psiClass.getQualifiedName();
if (qName != null) {
document.replaceString(
newElement.getTextRange().getStartOffset(), newEndOffset, qName);
newEndOffset = newElement.getTextRange().getStartOffset() + qName.length();
}
}
}
}
}
}
if (toDelete.isValid()) {
document.deleteString(toDelete.getStartOffset(), toDelete.getEndOffset());
}
return newEndOffset;
}
private static boolean isParameterizedReference(final PsiJavaCodeReferenceElement expression) {
PsiReferenceParameterList parameterList = expression.getParameterList();
return parameterList != null && parameterList.getFirstChild() != null;
}