private static TailType getReturnTail(PsiElement position) {
PsiElement scope = position;
while (true) {
if (scope instanceof PsiFile || scope instanceof PsiClassInitializer) {
return TailType.NONE;
}
if (scope instanceof PsiMethod) {
final PsiMethod method = (PsiMethod) scope;
if (method.isConstructor() || PsiType.VOID.equals(method.getReturnType())) {
return TailType.SEMICOLON;
}
return TailType.HUMBLE_SPACE_BEFORE_WORD;
}
if (scope instanceof PsiLambdaExpression) {
final PsiType returnType =
LambdaUtil.getFunctionalInterfaceReturnType(((PsiLambdaExpression) scope));
if (PsiType.VOID.equals(returnType)) {
return TailType.SEMICOLON;
}
return TailType.HUMBLE_SPACE_BEFORE_WORD;
}
scope = scope.getParent();
}
}
private static boolean superConstructorHasParameters(PsiMethod method) {
final PsiClass psiClass = method.getContainingClass();
if (psiClass == null) {
return false;
}
final PsiClass superClass = psiClass.getSuperClass();
if (superClass != null) {
for (final PsiMethod psiMethod : superClass.getConstructors()) {
final PsiResolveHelper resolveHelper =
JavaPsiFacade.getInstance(method.getProject()).getResolveHelper();
if (resolveHelper.isAccessible(psiMethod, method, null)
&& psiMethod.getParameterList().getParameters().length > 0) {
return true;
}
}
}
return false;
}
private static void completeAnnotationAttributeName(
CompletionResultSet result, PsiElement insertedElement, CompletionParameters parameters) {
PsiNameValuePair pair = PsiTreeUtil.getParentOfType(insertedElement, PsiNameValuePair.class);
PsiAnnotationParameterList parameterList = (PsiAnnotationParameterList) pair.getParent();
PsiAnnotation anno = (PsiAnnotation) parameterList.getParent();
boolean showClasses = psiElement().afterLeaf("(").accepts(insertedElement);
PsiClass annoClass = null;
final PsiJavaCodeReferenceElement referenceElement = anno.getNameReferenceElement();
if (referenceElement != null) {
final PsiElement element = referenceElement.resolve();
if (element instanceof PsiClass) {
annoClass = (PsiClass) element;
if (annoClass.findMethodsByName("value", false).length == 0) {
showClasses = false;
}
}
}
if (showClasses && insertedElement.getParent() instanceof PsiReferenceExpression) {
final Set<LookupElement> set =
JavaCompletionUtil.processJavaReference(
insertedElement,
(PsiJavaReference) insertedElement.getParent(),
new ElementExtractorFilter(createAnnotationFilter(insertedElement)),
JavaCompletionProcessor.Options.DEFAULT_OPTIONS,
result.getPrefixMatcher(),
parameters);
for (final LookupElement element : set) {
result.addElement(element);
}
addAllClasses(parameters, result, new InheritorsHolder(insertedElement, result));
}
if (annoClass != null) {
final PsiNameValuePair[] existingPairs = parameterList.getAttributes();
methods:
for (PsiMethod method : annoClass.getMethods()) {
if (!(method instanceof PsiAnnotationMethod)) continue;
final String attrName = method.getName();
for (PsiNameValuePair existingAttr : existingPairs) {
if (PsiTreeUtil.isAncestor(existingAttr, insertedElement, false)) break;
if (Comparing.equal(existingAttr.getName(), attrName)
|| PsiAnnotation.DEFAULT_REFERENCED_METHOD_NAME.equals(attrName)
&& existingAttr.getName() == null) continue methods;
}
LookupElementBuilder element =
LookupElementBuilder.createWithIcon(method)
.withInsertHandler(
new InsertHandler<LookupElement>() {
@Override
public void handleInsert(InsertionContext context, LookupElement item) {
final Editor editor = context.getEditor();
TailType.EQ.processTail(editor, editor.getCaretModel().getOffset());
context.setAddCompletionChar(false);
context.commitDocument();
PsiAnnotationParameterList paramList =
PsiTreeUtil.findElementOfClassAtOffset(
context.getFile(),
context.getStartOffset(),
PsiAnnotationParameterList.class,
false);
if (paramList != null
&& paramList.getAttributes().length > 0
&& paramList.getAttributes()[0].getName() == null) {
int valueOffset =
paramList.getAttributes()[0].getTextRange().getStartOffset();
context
.getDocument()
.insertString(
valueOffset, PsiAnnotation.DEFAULT_REFERENCED_METHOD_NAME);
TailType.EQ.processTail(
editor,
valueOffset + PsiAnnotation.DEFAULT_REFERENCED_METHOD_NAME.length());
}
}
});
PsiAnnotationMemberValue defaultValue = ((PsiAnnotationMethod) method).getDefaultValue();
if (defaultValue != null) {
Object constant =
JavaPsiFacade.getInstance(method.getProject())
.getConstantEvaluationHelper()
.computeConstantExpression(defaultValue);
if (constant != null) {
element =
element.withTailText(
" default " + (constant instanceof String ? "\"" + constant + "\"" : constant),
true);
}
}
result.addElement(element);
}
}
}