dennis lucero created NETBEANS-3791:
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Summary: Unclear use of Java hint: “Illegal Use of instanceOf
operator”
Key: NETBEANS-3791
URL: https://issues.apache.org/jira/browse/NETBEANS-3791
Project: NetBeans
Issue Type: Improvement
Components: java - Hints
Environment: JDK 8 project, NetBeans running on JDK 13
Reporter: dennis lucero
In an annotation processor similar to
{code:java}
@SupportedAnnotationTypes("org.example.MyAnnotation")
public final class MyGenerator
extends javax.annotation.processing.AbstractProcessor {
@Override
public boolean process(
final Set<? extends TypeElement> annotations,
final RoundEnvironment roundEnvironment) {
final Set<? extends Element> elements
= roundEnvironment.getElementsAnnotatedWith(MyAnnotation.class);
for (final Element element : elements) {
PackageElement packageElement = null;
for (Element currentElement = typeElement;
currentElement != null;
currentElement = currentElement.getEnclosingElement()) {
if (currentElement instanceof PackageElement) { // Illegal Use
of instanceOf
packageElement = (PackageElement) currentElement;
break;
}
{code}
I get the warning “Illegal Use of instanceOf operator” (in the line with the
comment). It is unclear why this use would be illegal, as it works fine.
The description of the hint in the options should clearly say why it’s illegal
to use instanceOf or, if this warning is obsolete, the hint should be removed.
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