public String calcGenerics(@NotNull PsiElement context, InsertionContext insertionContext) {
if (insertionContext.getCompletionChar() == '<') {
return "";
}
assert context.isValid();
if (myDiamond) {
return "<>";
}
if (getObject() instanceof PsiClass) {
PsiClass psiClass = (PsiClass) getObject();
PsiResolveHelper resolveHelper =
JavaPsiFacade.getInstance(psiClass.getProject()).getResolveHelper();
PsiSubstitutor substitutor = getSubstitutor();
StringBuilder builder = new StringBuilder();
for (PsiTypeParameter parameter : psiClass.getTypeParameters()) {
PsiType substitute = substitutor.substitute(parameter);
if (substitute == null
|| (PsiUtil.resolveClassInType(substitute) == parameter
&& resolveHelper.resolveReferencedClass(parameter.getName(), context)
!= CompletionUtil.getOriginalOrSelf(parameter))) {
return "";
}
if (builder.length() > 0) {
builder.append(", ");
}
builder.append(substitute.getCanonicalText());
}
if (builder.length() > 0) {
return "<" + builder + ">";
}
}
return "";
}
private static PsiTypeLookupItem doCreateItem(
final PsiType type,
PsiElement context,
int bracketsCount,
boolean diamond,
InsertHandler<PsiTypeLookupItem> importFixer) {
if (type instanceof PsiClassType) {
PsiClassType.ClassResolveResult classResolveResult = ((PsiClassType) type).resolveGenerics();
final PsiClass psiClass = classResolveResult.getElement();
if (psiClass != null) {
String name = psiClass.getName();
if (name != null) {
final PsiSubstitutor substitutor = classResolveResult.getSubstitutor();
PsiClass resolved =
JavaPsiFacade.getInstance(psiClass.getProject())
.getResolveHelper()
.resolveReferencedClass(name, context);
Set<String> allStrings = new HashSet<String>();
allStrings.add(name);
if (!psiClass.getManager().areElementsEquivalent(resolved, psiClass)
&& !PsiUtil.isInnerClass(psiClass)) {
// inner class name should be shown qualified if its not accessible by single name
PsiClass aClass = psiClass.getContainingClass();
while (aClass != null && !PsiUtil.isInnerClass(aClass) && aClass.getName() != null) {
name = aClass.getName() + '.' + name;
allStrings.add(name);
aClass = aClass.getContainingClass();
}
}
PsiTypeLookupItem item =
new PsiTypeLookupItem(
psiClass, name, diamond, bracketsCount, importFixer, substitutor);
item.addLookupStrings(ArrayUtil.toStringArray(allStrings));
return item;
}
}
}
return new PsiTypeLookupItem(
type, type.getPresentableText(), false, bracketsCount, importFixer, PsiSubstitutor.EMPTY);
}