extract class: do not qualify enums in switches (IDEA-76587 )

java/java-impl/src/com/intellij/refactoring/extractclass/ExtractedClassBuilder.java

@@ -422,7 +422,9 @@ class ExtractedClassBuilder {
           }
           else {
             if (field.hasModifierProperty(PsiModifier.STATIC)) {
-              if (staticImported) {
+              if (field instanceof PsiEnumConstant) {
+                out.append(field.getName());
+              } else if (staticImported) {
                 final PsiImportStaticStatement importStaticStatement = (PsiImportStaticStatement)resolveResult.getCurrentFileResolveScope();
                 final PsiClass targetClass = importStaticStatement.resolveTargetClass();
                 out.append(targetClass != null ? targetClass.getQualifiedName() : "").append(".").append(field.getName());

java/java-tests/testData/refactoring/extractClass/enumSwitch/after/Extracted.java

@@ -0,0 +1,11 @@
+public class Extracted {
+    static void foo(Test t) {
+        switch (p) {
+            case FRED:
+                break;
+
+            case GEORGE:
+                break;
+        }
+    }
+}

java/java-tests/testData/refactoring/extractClass/enumSwitch/after/Test.java

@@ -0,0 +1,7 @@
+public class Test {
+
+}
+
+enum Person {
+  FRED, GEORGE;
+}

java/java-tests/testData/refactoring/extractClass/enumSwitch/before/Test.java

@@ -0,0 +1,16 @@
+public class Test {
+
+  static void foo(Test t) {
+    switch (p) {
+      case FRED:
+        break;
+
+      case GEORGE:
+        break;
+    }
+  }
+}
+
+enum Person {
+  FRED, GEORGE;
+}

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

@@ -97,6 +97,10 @@ public class ExtractClassTest extends MultiFileTestCase{
     doTestMethod();
   }
 
+  public void testEnumSwitch() throws Exception {
+    doTestMethod();
+  }
+
   private void doTestFieldAndMethod() throws Exception {
     doTestFieldAndMethod("bar");
   }