[java-refactoring] IDEA-340087 produce accurate PsiType for implicit classes

- fix Introduce variable throws exception in implicit classes

GitOrigin-RevId: c3489b1c6df3669f01b6e5defbf8a2208a7b441d

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

@@ -224,7 +224,7 @@ public class PsiImmediateClassType extends PsiClassType.Stub {
     PsiClass enclosingClass = null;
     if (!aClass.hasModifierProperty(PsiModifier.STATIC)) {
       PsiElement parent = aClass.getParent();
-      if (parent instanceof PsiClass && !(parent instanceof PsiAnonymousClass)) {
+      if (parent instanceof PsiClass && !(parent instanceof PsiAnonymousClass) && !(parent instanceof PsiImplicitClass)) {
         enclosingClass = (PsiClass)parent;
       }
     }

java/java-tests/testData/refactoring/introduceVariable/FromFinalFieldOnAssignment.after.java

@@ -2,7 +2,7 @@ public class C {
   private final String myStr;
 
   public C() {
-    myStr = "";
       String strings = myStr;
+      strings = "";
   }
 }

java/java-tests/testData/refactoring/introduceVariable/IntroduceVariableInsideImplicitClass.after.java

@@ -0,0 +1,8 @@
+class Nested {
+}
+
+void main() {
+    Class<Nested> x = Nested.class;
+    System.out.println(x);
+}
+

java/java-tests/testData/refactoring/introduceVariable/IntroduceVariableInsideImplicitClass.java

@@ -0,0 +1,7 @@
+class Nested {
+}
+
+void main() {
+  System.out.println(<selection>Nested.class</selection>);
+}
+

java/java-tests/testData/refactoring/introduceVariable/NoNameConflict.after.java

@@ -1,5 +1,5 @@
 class cTest {
   {
-      cTest cTest = new cTest();<caret>
+      cTest <caret>cTest = new cTest();
   }
 }

java/java-tests/testData/refactoring/introduceVariable/SCR26075For.after.java

@@ -7,8 +7,7 @@ class C {
 
     void test () {
         C c = new C();
-        String wrong = c.f();
-        for (; wrong != null;) {
+        for (;c.f() != null;) {
             c = c.getParent();
         }
     }

java/java-tests/testSrc/com/intellij/java/refactoring/IntroduceVariableTest.java

@@ -510,6 +510,10 @@ public class IntroduceVariableTest extends LightJavaCodeInsightTestCase {
     doTest("x", true, false, true, "int");
   }
 
+  public void testIntroduceVariableInsideImplicitClass() {
+    doTest("x", true, false, false, "java.lang.Class<Nested>");
+  }
+
   private void doTestWithVarType(IntroduceVariableBase testMe) {
     Boolean asVarType = JavaRefactoringSettings.getInstance().INTRODUCE_LOCAL_CREATE_VAR_TYPE;
     try {
@@ -540,8 +544,9 @@ public class IntroduceVariableTest extends LightJavaCodeInsightTestCase {
     testMe.invoke(getProject(), getEditor(), getFile(), null);
     NonBlockingReadActionImpl.waitForAsyncTaskCompletion();
     TemplateState state = TemplateManagerImpl.getTemplateState(getEditor());
-    if (state == null) return;
-    state.gotoEnd(false);
+    if (state != null) {
+      state.gotoEnd(false);
+    }
     checkResultByFile(baseName + ".after.java");
   }
 }