Java: make the "Unnecessary call to 'super()'" inspection Flexible Constructor Bodies aware (IDEA-381049)

GitOrigin-RevId: 4401dc7b2a72ca3273b9eb1cfd0caa0e1438abb3

java/java-analysis-impl/src/com/siyeh/ig/style/UnnecessarySuperConstructorInspection.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2003-2018 Dave Griffith, Bas Leijdekkers
+ * Copyright 2003-2025 Dave Griffith, Bas Leijdekkers
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,9 +21,8 @@ import com.intellij.java.syntax.parser.JavaKeywords;
 import com.intellij.modcommand.ModPsiUpdater;
 import com.intellij.modcommand.PsiUpdateModCommandQuickFix;
 import com.intellij.openapi.project.Project;
-import com.intellij.psi.PsiElement;
-import com.intellij.psi.PsiMethodCallExpression;
-import com.intellij.psi.PsiReferenceExpression;
+import com.intellij.psi.*;
+import com.intellij.psi.util.PsiTreeUtil;
 import com.siyeh.InspectionGadgetsBundle;
 import com.siyeh.ig.BaseInspection;
 import com.siyeh.ig.BaseInspectionVisitor;
@@ -72,10 +71,14 @@ public final class UnnecessarySuperConstructorInspection extends BaseInspection
     public void visitMethodCallExpression(@NotNull PsiMethodCallExpression call) {
       super.visitMethodCallExpression(call);
       final PsiReferenceExpression methodExpression = call.getMethodExpression();
-      if (methodExpression.isQualified() || !JavaKeywords.SUPER.equals(methodExpression.getReferenceName())) {
-        return;
-      }
-      if (!call.getArgumentList().isEmpty()) {
+      if (methodExpression.isQualified() 
+          || !JavaKeywords.SUPER.equals(methodExpression.getReferenceName()) 
+          || !call.getArgumentList().isEmpty() 
+          || !(call.getParent() instanceof PsiExpressionStatement statement)
+          || !(statement.getParent() instanceof PsiCodeBlock block)
+          || !(block.getParent() instanceof PsiMethod method)
+          || !method.isConstructor()
+          || PsiTreeUtil.getPrevSiblingOfType(statement, PsiStatement.class) != null) {
         return;
       }
       registerError(call);

java/java-tests/testSrc/com/siyeh/ig/style/UnnecessarySuperConstructorInspectionTest.java

@@ -1,4 +1,4 @@
-// Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
+// 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.style;
 
 import com.intellij.codeInspection.InspectionProfileEntry;
@@ -11,22 +11,42 @@ import org.jetbrains.annotations.Nullable;
 public class UnnecessarySuperConstructorInspectionTest extends LightJavaInspectionTestCase {
 
   public void testQualifiedSuper() {
-    doTest("class Outer {" +
-           "  class Super {}" +
-           "  class Inner extends Super {" +
-           "    Inner(Outer outer) {" +
-           "      outer.super();" +
-           "    }" +
-           "  }" +
-           "}");
+    doTest("""
+             class Outer {
+               class Super {}
+               class Inner extends Super {
+                 Inner(Outer outer) {
+                   outer.super();
+                 }
+               }
+             }""");
   }
 
   public void testSimple() {
-    doTest("class Simple {" +
-           "  Simple() {" +
-           "    /*'super()' is unnecessary*/super()/**/;" +
-           "  }" +
-           "}");
+    doTest("""
+             class Simple {
+               Simple() {
+                 /*'super()' is unnecessary*/super()/**/;
+               }
+             }""");
+  }
+  
+  public void testFlexibleConstructorBody() {
+    doTest("""
+             class Friend {
+               Friend() {
+                 System.out.println(0);
+               }
+             }
+             class Flexible extends Friend {
+             
+               Flexible() {
+                 System.out.println("before");
+                 super();
+                 System.out.println("after");
+               }
+             }
+             """);
   }
 
   @Nullable