ReplaceNullCheckInspection: support parentheses

java/java-impl/src/com/intellij/codeInspection/ReplaceNullCheckInspection.java

@@ -296,7 +296,7 @@ public class ReplaceNullCheckInspection extends AbstractBaseJavaLocalInspectionT
       PsiBinaryExpression binOp = tryCast(ternary.getCondition(), PsiBinaryExpression.class);
       if(binOp == null) return null;
       PsiExpression value = ExpressionUtils.getValueComparedWithNull(binOp);
-      PsiReferenceExpression referenceExpression = tryCast(value, PsiReferenceExpression.class);
+      PsiReferenceExpression referenceExpression = tryCast(PsiUtil.skipParenthesizedExprDown(value), PsiReferenceExpression.class);
       if(referenceExpression == null) return null;
       PsiVariable variable = tryCast(referenceExpression.resolve(), PsiVariable.class);
       if(variable == null) return null;

java/java-tests/testData/inspection/requireNonNull/beforeTernaryInvertedNonSimpleCheck.java

@@ -4,6 +4,6 @@ import java.util.*;
 
 class Test {
   public void test(Object o) {
-    o = o <caret>!= null? o : new Object();
+    o = (o) <caret>!= null? o : new Object();
   }
 }