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;
}
public void registerSingleClass(@Nullable InheritorsHolder inheritors) {
if (inheritors != null && myTypeItems.size() == 1) {
PsiType type = myTypeItems.get(0).getType();
PsiClass aClass = PsiUtil.resolveClassInClassTypeOnly(type);
if (aClass != null && !aClass.hasTypeParameters()) {
myTypeItems.get(0).setShowPackage();
inheritors.registerClass(aClass);
}
}
}
@Nullable
private static Boolean isAssignableForNativeTypes(
@NotNull PsiType lType, @NotNull PsiClassType rType, @NotNull PsiElement context) {
if (!(lType instanceof PsiClassType)) return null;
final PsiClassType.ClassResolveResult leftResult = ((PsiClassType) lType).resolveGenerics();
final PsiClassType.ClassResolveResult rightResult = rType.resolveGenerics();
final PsiClass leftClass = leftResult.getElement();
PsiClass rightClass = rightResult.getElement();
if (rightClass == null || leftClass == null) return null;
if (!InheritanceUtil.isInheritorOrSelf(rightClass, leftClass, true)) return Boolean.FALSE;
PsiSubstitutor rightSubstitutor = rightResult.getSubstitutor();
if (!leftClass.hasTypeParameters()) return Boolean.TRUE;
PsiSubstitutor leftSubstitutor = leftResult.getSubstitutor();
if (!leftClass.getManager().areElementsEquivalent(leftClass, rightClass)) {
rightSubstitutor =
TypeConversionUtil.getSuperClassSubstitutor(leftClass, rightClass, rightSubstitutor);
rightClass = leftClass;
} else if (!rightClass.hasTypeParameters()) return Boolean.TRUE;
Iterator<PsiTypeParameter> li = PsiUtil.typeParametersIterator(leftClass);
Iterator<PsiTypeParameter> ri = PsiUtil.typeParametersIterator(rightClass);
while (li.hasNext()) {
if (!ri.hasNext()) return Boolean.FALSE;
PsiTypeParameter lp = li.next();
PsiTypeParameter rp = ri.next();
final PsiType typeLeft = leftSubstitutor.substitute(lp);
if (typeLeft == null) continue;
final PsiType typeRight = rightSubstitutor.substituteWithBoundsPromotion(rp);
if (typeRight == null) {
return Boolean.TRUE;
}
if (!isAssignableWithoutConversions(typeLeft, typeRight, context)) return Boolean.FALSE;
}
return Boolean.TRUE;
}
@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];
}
private static boolean isSafeToShortenReference(
final String referenceText, final PsiElement psiReference, final PsiClass refClass) {
final PsiManager manager = refClass.getManager();
final JavaPsiFacade facade = JavaPsiFacade.getInstance(manager.getProject());
final PsiResolveHelper helper = facade.getResolveHelper();
if (manager.areElementsEquivalent(
refClass, helper.resolveReferencedClass(referenceText, psiReference))) {
if (psiReference instanceof PsiJavaCodeReferenceElement) {
PsiElement parent = psiReference.getParent();
if (parent instanceof PsiNewExpression || parent.getParent() instanceof PsiNewExpression)
return true;
if (parent instanceof PsiTypeElement
&& parent.getParent() instanceof PsiInstanceOfExpression) {
final PsiClass containingClass = refClass.getContainingClass();
if (containingClass != null && containingClass.hasTypeParameters()) {
return false;
}
}
}
return helper.resolveReferencedVariable(referenceText, psiReference) == null;
}
return false;
}
public void handleInsert(
final InsertionContext context, final JavaPsiClassReferenceElement item) {
final char c = context.getCompletionChar();
int offset = context.getTailOffset() - 1;
final PsiFile file = context.getFile();
if (PsiTreeUtil.findElementOfClassAtOffset(file, offset, PsiImportStatementBase.class, false)
!= null) {
final PsiJavaCodeReferenceElement ref =
PsiTreeUtil.findElementOfClassAtOffset(
file, offset, PsiJavaCodeReferenceElement.class, false);
final String qname = item.getQualifiedName();
if (qname != null && (ref == null || !qname.equals(ref.getCanonicalText()))) {
AllClassesGetter.INSERT_FQN.handleInsert(context, item);
}
return;
}
PsiElement position = file.findElementAt(offset);
PsiClass psiClass = item.getObject();
final Project project = context.getProject();
final boolean annotation = insertingAnnotation(context, item);
final Editor editor = context.getEditor();
if (c == '#') {
context.setLaterRunnable(
new Runnable() {
public void run() {
new CodeCompletionHandlerBase(CompletionType.BASIC).invokeCompletion(project, editor);
}
});
} else if (c == '.' && PsiTreeUtil.getParentOfType(position, PsiParameterList.class) == null) {
AutoPopupController.getInstance(context.getProject())
.autoPopupMemberLookup(context.getEditor(), null);
}
if (position != null) {
PsiElement parent = position.getParent();
if (parent instanceof PsiJavaCodeReferenceElement) {
final PsiJavaCodeReferenceElement ref = (PsiJavaCodeReferenceElement) parent;
if (PsiTreeUtil.getParentOfType(position, PsiDocTag.class) != null
&& ref.isReferenceTo(psiClass)) {
return;
}
}
}
OffsetKey refEnd = context.trackOffset(context.getTailOffset(), false);
boolean fillTypeArgs = context.getCompletionChar() == '<';
if (fillTypeArgs) {
context.setAddCompletionChar(false);
}
if (shouldInsertParentheses(psiClass, position)) {
if (ConstructorInsertHandler.insertParentheses(context, item, psiClass, false)) {
fillTypeArgs |=
psiClass.hasTypeParameters()
&& PsiUtil.getLanguageLevel(file).isAtLeast(LanguageLevel.JDK_1_5);
}
} else if (insertingAnnotationWithParameters(context, item)) {
JavaCompletionUtil.insertParentheses(context, item, false, true);
AutoPopupController.getInstance(project).autoPopupParameterInfo(editor, null);
}
LOG.assertTrue(context.getTailOffset() >= 0);
String docText = context.getDocument().getText();
DefaultInsertHandler.addImportForItem(context, item);
if (context.getTailOffset() < 0) {
LOG.error(
LogMessageEx.createEvent(
"Tail offset degraded after insertion",
"start=" + context.getStartOffset(),
new Attachment(
context.getFile().getViewProvider().getVirtualFile().getPath(), docText)));
}
if (annotation) {
// Check if someone inserts annotation class that require @
PsiElement elementAt = file.findElementAt(context.getStartOffset());
final PsiElement parentElement = elementAt != null ? elementAt.getParent() : null;
if (elementAt instanceof PsiIdentifier
&& (PsiTreeUtil.getParentOfType(elementAt, PsiAnnotationParameterList.class) != null
|| parentElement instanceof PsiErrorElement
&& parentElement.getParent()
instanceof PsiJavaFile // top level annotation without @
)
&& isAtTokenNeeded(context)) {
int expectedOffsetForAtToken = elementAt.getTextRange().getStartOffset();
context.getDocument().insertString(expectedOffsetForAtToken, "@");
}
}
if (fillTypeArgs) {
PostprocessReformattingAspect.getInstance(project).doPostponedFormatting();
int typeArgs = context.getOffset(refEnd);
if (typeArgs >= 0) {
context.getDocument().insertString(typeArgs, "<>");
context.getEditor().getCaretModel().moveToOffset(typeArgs + 1);
}
}
}
@SuppressWarnings({"HardCodedStringLiteral"})
private static String generateClassInfo(PsiClass aClass) {
StringBuilder buffer = new StringBuilder();
GroovyFile file = (GroovyFile) aClass.getContainingFile();
String packageName = file.getPackageName();
if (packageName.length() > 0) {
buffer.append(packageName).append("\n");
}
final String classString =
aClass.isInterface()
? "interface"
: aClass instanceof PsiTypeParameter
? "type parameter"
: aClass.isEnum() ? "enum" : "class";
buffer.append(classString).append(" ").append(aClass.getName());
if (aClass.hasTypeParameters()) {
PsiTypeParameter[] typeParameters = aClass.getTypeParameters();
buffer.append("<");
for (int i = 0; i < typeParameters.length; i++) {
if (i > 0) buffer.append(", ");
PsiTypeParameter tp = typeParameters[i];
buffer.append(tp.getName());
PsiClassType[] refs = tp.getExtendsListTypes();
if (refs.length > 0) {
buffer.append(" extends ");
for (int j = 0; j < refs.length; j++) {
if (j > 0) buffer.append(" & ");
appendTypeString(buffer, refs[j], aClass);
}
}
}
buffer.append(">");
}
PsiClassType[] refs = aClass.getExtendsListTypes();
if (refs.length > 0
|| !aClass.isInterface()
&& !CommonClassNames.JAVA_LANG_OBJECT.equals(aClass.getQualifiedName())) {
buffer.append(" extends ");
if (refs.length == 0) {
buffer.append("Object");
} else {
for (int i = 0; i < refs.length; i++) {
if (i > 0) buffer.append(", ");
appendTypeString(buffer, refs[i], aClass);
}
}
}
refs = aClass.getImplementsListTypes();
if (refs.length > 0) {
buffer.append("\nimplements ");
for (int i = 0; i < refs.length; i++) {
if (i > 0) buffer.append(", ");
appendTypeString(buffer, refs[i], aClass);
}
}
return buffer.toString();
}