Java: fix PsiClass.getScope() method which was broken by the migration to the new stubs api (IDEA-376896)

GitOrigin-RevId: e204142d2cd57a6cdb83285064ec21fe15b8270b

java/java-psi-impl/src/com/intellij/psi/impl/source/PsiClassImpl.java

@@ -21,7 +21,6 @@ import com.intellij.psi.javadoc.PsiDocComment;
 import com.intellij.psi.scope.PsiScopeProcessor;
 import com.intellij.psi.search.SearchScope;
 import com.intellij.psi.stub.JavaStubImplUtil;
-import com.intellij.psi.stubs.IStubElementType;
 import com.intellij.psi.stubs.PsiFileStub;
 import com.intellij.psi.stubs.StubElement;
 import com.intellij.psi.tree.IElementType;
@@ -116,18 +115,7 @@ public class PsiClassImpl extends JavaStubPsiElement<PsiClassStub<?>> implements
     if (stub != null) {
       return stub.getParentStub().getPsi();
     }
-
-    ASTNode treeElement = getNode();
-    ASTNode parent = treeElement.getTreeParent();
-
-    while(parent != null) {
-      if (parent.getElementType() instanceof IStubElementType){
-        return parent.getPsi();
-      }
-      parent = parent.getTreeParent();
-    }
-
-    return getContainingFile();
+    return PsiTreeUtil.getParentOfType(this, PsiMember.class, PsiFile.class);
   }
 
   @Override

java/java-tests/testData/ig/com/siyeh/igtest/performance/class_initializer_may_be_static/NoStaticInInnerClass.java

@@ -0,0 +1,12 @@
+class NoStaticInInnerClass {
+
+  {
+    new Inner();
+  }
+  
+  class Inner {
+    {
+      System.out.println("Sunshine and happiness");
+    }
+  }
+}

java/java-tests/testData/ig/com/siyeh/igtest/performance/method_may_be_static/MethodMayBeStatic.java

@@ -97,4 +97,11 @@ class WithArrayReference {
   private void <warning descr="Method 'foo()' may be 'static'">foo</warning>() {
     IntSupplier aNew = Object[]::new;
   }
+}
+class InnerClassScope {
+  class Inner {}
+  
+  Inner create() {
+    return new Inner();
+  }
 }

java/java-tests/testSrc/com/siyeh/ig/performance/ClassInitializerMayBeStaticInspectionTest.java

@@ -1,7 +1,9 @@
-// Copyright 2000-2022 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
+// Copyright 2000-2025 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
 package com.siyeh.ig.performance;
 
 import com.intellij.codeInspection.InspectionProfileEntry;
+import com.intellij.pom.java.LanguageLevel;
+import com.intellij.testFramework.IdeaTestUtil;
 import com.siyeh.ig.LightJavaInspectionTestCase;
 import org.jetbrains.annotations.Nullable;
 
@@ -14,6 +16,10 @@ public class ClassInitializerMayBeStaticInspectionTest extends LightJavaInspecti
   public void testAnonymousClass() {
     doTest();
   }
+  
+  public void testNoStaticInInnerClass() {
+    IdeaTestUtil.withLevel(getModule(), LanguageLevel.JDK_15, this::doTest);
+  }
 
   @Nullable
   @Override