bugfix KubernetesApiResponse cannot be cast to class KubernetesObject (#1631)

* bugfix KubernetesApiResponse cannot be cast to class KubernetesObject

* fix source code format

* update catch ApiException

Author: lin1005q

extended/src/main/java/io/kubernetes/client/extended/kubectl/KubectlPatch.java

@@ -15,6 +15,7 @@
 import io.kubernetes.client.common.KubernetesObject;
 import io.kubernetes.client.custom.V1Patch;
 import io.kubernetes.client.extended.kubectl.exception.KubectlException;
+import io.kubernetes.client.openapi.ApiException;
 import io.kubernetes.client.util.ModelMapper;
 import io.kubernetes.client.util.generic.GenericKubernetesApi;
 
@@ -44,10 +45,22 @@ public ApiType execute() throws KubectlException {
     refreshDiscovery();
 
     GenericKubernetesApi genericKubernetesApi = getGenericApi();
-    if (ModelMapper.isNamespaced(apiTypeClass)) {
-      return (ApiType) genericKubernetesApi.patch(namespace, name, patchType, patchContent);
-    } else {
-      return (ApiType) genericKubernetesApi.patch(name, patchType, patchContent);
+    try {
+      if (ModelMapper.isNamespaced(apiTypeClass)) {
+        return (ApiType)
+            genericKubernetesApi
+                .patch(namespace, name, patchType, patchContent)
+                .throwsApiException()
+                .getObject();
+      } else {
+        return (ApiType)
+            genericKubernetesApi
+                .patch(name, patchType, patchContent)
+                .throwsApiException()
+                .getObject();
+      }
+    } catch (ApiException e) {
+      throw new KubectlException(e);
     }
   }
 }