Move inner class to upper level: make outer field final

GitOrigin-RevId: 309caf35d99871f438f171ac3320b9314779132c

java/java-impl/src/com/intellij/refactoring/move/moveInner/MoveInnerProcessor.java

@@ -1,18 +1,4 @@
-/*
- * Copyright 2000-2015 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+// Copyright 2000-2019 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.
 package com.intellij.refactoring.move.moveInner;
 
 import com.intellij.codeInsight.ChangeContextUtil;
@@ -170,7 +156,7 @@ public class MoveInnerProcessor extends BaseRefactoringProcessor {
       PsiField field = null;
       if (myParameterNameOuterClass != null) {
         // pass outer as a parameter
-        field = factory.createField(myFieldNameOuterClass, factory.createType(myOuterClass));
+        field = createOuterField(factory);
         field = addOuterField(field);
         myInnerClass = field.getContainingClass();
         addFieldInitializationToConstructors(myInnerClass, field, myParameterNameOuterClass);
@@ -307,6 +293,17 @@ public class MoveInnerProcessor extends BaseRefactoringProcessor {
     }
   }
 
+  @NotNull
+  private PsiField createOuterField(@NotNull PsiElementFactory factory) {
+    PsiField field = factory.createField(myFieldNameOuterClass, factory.createType(myOuterClass));
+
+    PsiModifierList modifierList = field.getModifierList();
+    LOG.assertTrue(modifierList != null);
+    modifierList.setModifierProperty(PsiModifier.FINAL, true);
+
+    return field;
+  }
+
   private PsiField addOuterField(PsiField field) {
     final PsiMember[] members = PsiTreeUtil.getChildrenOfType(myInnerClass, PsiMember.class);
     if (members != null) {