private static Set<LookupElement> suggestQualifierItems(
CompletionParameters parameters,
PsiJavaCodeReferenceElement qualifier,
ElementFilter filter) {
String referenceName = qualifier.getReferenceName();
if (referenceName == null) {
return Collections.emptySet();
}
PrefixMatcher qMatcher = new CamelHumpMatcher(referenceName);
Set<LookupElement> plainVariants =
JavaSmartCompletionContributor.completeReference(
qualifier, qualifier, filter, true, true, parameters, qMatcher);
for (PsiClass aClass :
PsiShortNamesCache.getInstance(qualifier.getProject())
.getClassesByName(referenceName, qualifier.getResolveScope())) {
plainVariants.add(JavaClassNameCompletionContributor.createClassLookupItem(aClass, true));
}
if (!plainVariants.isEmpty()) {
return plainVariants;
}
final Set<LookupElement> allClasses = new LinkedHashSet<LookupElement>();
PsiElement qualifierName = qualifier.getReferenceNameElement();
if (qualifierName != null) {
JavaClassNameCompletionContributor.addAllClasses(
parameters.withPosition(qualifierName, qualifierName.getTextRange().getEndOffset()),
true,
qMatcher,
new CollectConsumer<LookupElement>(allClasses));
}
return allClasses;
}
static List<? extends LookupElement> createLookupElements(
CompletionElement completionElement, PsiJavaReference reference) {
Object completion = completionElement.getElement();
assert !(completion instanceof LookupElement);
if (reference instanceof PsiJavaCodeReferenceElement) {
if (completion instanceof PsiMethod
&& ((PsiJavaCodeReferenceElement) reference).getParent()
instanceof PsiImportStaticStatement) {
return Collections.singletonList(
JavaLookupElementBuilder.forMethod((PsiMethod) completion, PsiSubstitutor.EMPTY));
}
if (completion instanceof PsiClass) {
return JavaClassNameCompletionContributor.createClassLookupItems(
(PsiClass) completion,
JavaClassNameCompletionContributor.AFTER_NEW.accepts(reference),
JavaClassNameInsertHandler.JAVA_CLASS_INSERT_HANDLER,
Conditions.<PsiClass>alwaysTrue());
}
}
if (reference instanceof PsiMethodReferenceExpression
&& completion instanceof PsiMethod
&& ((PsiMethod) completion).isConstructor()) {
return Collections.singletonList(
JavaLookupElementBuilder.forMethod(
(PsiMethod) completion, "new", PsiSubstitutor.EMPTY, null));
}
PsiSubstitutor substitutor = completionElement.getSubstitutor();
if (substitutor == null) substitutor = PsiSubstitutor.EMPTY;
if (completion instanceof PsiClass) {
return Collections.singletonList(
JavaClassNameCompletionContributor.createClassLookupItem((PsiClass) completion, true)
.setSubstitutor(substitutor));
}
if (completion instanceof PsiMethod) {
return Collections.singletonList(
new JavaMethodCallElement((PsiMethod) completion).setQualifierSubstitutor(substitutor));
}
if (completion instanceof PsiVariable) {
return Collections.singletonList(
new VariableLookupItem((PsiVariable) completion).setSubstitutor(substitutor));
}
return Collections.singletonList(LookupItemUtil.objectToLookupItem(completion));
}
