[java-inspections] CastCanBeRemoved: process captured wildcards (IDEA-279096)

GitOrigin-RevId: 163695bf4d40bad340fea28fc9dbaa29c985acbd

java/java-tests/testData/inspection/castCanBeRemovedNarrowingVariableType/afterCapture.java

@@ -0,0 +1,12 @@
+// "Change type of 'obj' to 'Reference<?>' and remove cast" "true"
+import java.lang.ref.Reference;
+import java.lang.ref.ReferenceQueue;
+
+class CastToRef {
+  private static final ReferenceQueue<Object> queue = new ReferenceQueue<>();
+
+  public static void main(String[] args) throws InterruptedException {
+    Reference<?> obj = queue.remove();
+    obj.clear();
+  }
+}

java/java-tests/testData/inspection/castCanBeRemovedNarrowingVariableType/beforeCapture.java

@@ -0,0 +1,12 @@
+// "Change type of 'obj' to 'Reference<?>' and remove cast" "true"
+import java.lang.ref.Reference;
+import java.lang.ref.ReferenceQueue;
+
+class CastToRef {
+  private static final ReferenceQueue<Object> queue = new ReferenceQueue<>();
+
+  public static void main(String[] args) throws InterruptedException {
+    Object obj = queue.remove();
+    ((<caret>Reference<?>)obj).clear();
+  }
+}

plugins/InspectionGadgets/src/com/intellij/codeInspection/redundantCast/CastCanBeRemovedNarrowingVariableTypeInspection.java

@@ -28,7 +28,7 @@ public class CastCanBeRemovedNarrowingVariableTypeInspection extends AbstractBas
       public void visitTypeCastExpression(PsiTypeCastExpression cast) {
         PsiTypeElement castTypeElement = cast.getCastType();
         if (castTypeElement == null || castTypeElement.getAnnotations().length > 0) return;
-        PsiType castType = cast.getType();
+        PsiType castType = GenericsUtil.getVariableTypeByExpressionType(cast.getType());
         if (!(castType instanceof PsiClassType) || ((PsiClassType)castType).isRaw()) return;
         PsiReferenceExpression ref = tryCast(PsiUtil.skipParenthesizedExprDown(cast.getOperand()), PsiReferenceExpression.class);
         if (ref == null) return;
@@ -56,7 +56,7 @@ public class CastCanBeRemovedNarrowingVariableTypeInspection extends AbstractBas
         else {
           PsiExpression variableInitializer = variable.getInitializer();
           if (variableInitializer != null) {
-            PsiType initializerType = variableInitializer.getType();
+            PsiType initializerType = GenericsUtil.getVariableTypeByExpressionType(variableInitializer.getType());
             if (initializerType == null || !castType.isAssignableFrom(initializerType)) return;
           }
         }