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Fix Class.getSuperClass() infinite loop when called on java.lang.Object #39

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Fix Class.getSuperClass() infinite loop when called on java.lang.Object #39

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Copilot Mar 18, 2026
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Fix getSuperClass() not to return Object for Object to prevent infini…
Copilot Mar 18, 2026
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6 changes: 5 additions & 1 deletion Core/org.emftext.language.java/src/org/emftext/language/java/util/JavaModelCompletion.java
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Original file line number Diff line number Diff line change
Expand Up @@ -82,12 +82,16 @@ public static void complete(Resource resource) {
/**
* Adds <code>java.lang.Object</code> as default super class to the given
* class if the class does not explicitly extend another class.
* <code>java.lang.Object</code> itself is excluded since it has no super
* class, and setting it would cause an infinite loop when transitively
* traversing {@code getSuperClass()}.
*
* @param javaClass
* the class to complete
*/
public static void addDefaultSuperClass(Class javaClass) {
if (javaClass.getExtends() == null && javaClass.getDefaultExtends() == null) {
if (javaClass.getExtends() == null && javaClass.getDefaultExtends() == null
&& !javaClass.isJavaLangObject(javaClass)) {
Class objectClass = javaClass.getObjectClass();
ClassifierReference classifierReference = TypesFactory.eINSTANCE.createClassifierReference();
classifierReference.setTarget(objectClass);
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