fixes gson-syntax-exception upon deletion even if the deletion succeeds

Author: yue9944882

e2e/src/test/groovy/io/kubernetes/client/e2e/basic/CoreV1ApiTest.groovy

@@ -0,0 +1,41 @@
+/*
+Copyright 2020 The Kubernetes Authors.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package io.kubernetes.client.e2e.basic
+
+import io.kubernetes.client.openapi.Configuration
+import io.kubernetes.client.openapi.apis.CoreV1Api
+import io.kubernetes.client.openapi.models.V1Namespace
+import io.kubernetes.client.openapi.models.V1ObjectMeta
+import io.kubernetes.client.openapi.models.V1Status
+import io.kubernetes.client.util.ClientBuilder
+import spock.lang.Specification
+
+class CoreV1ApiTest extends Specification {
+    def "Create Namespace then Delete should work"() {
+        given:
+        def apiClient = ClientBuilder.defaultClient()
+        def corev1api = new CoreV1Api(apiClient)
+        Configuration.setDefaultApiClient(apiClient)
+        def namespaceFoo = new V1Namespace().metadata(new V1ObjectMeta().name("foo"))
+        when:
+        V1Namespace created = corev1api.createNamespace(namespaceFoo, null, null, null)
+        then:
+        created != null
+        when:
+        V1Status deleted = corev1api.deleteNamespace("foo", null, null, null, null, null, null)
+        then:
+        deleted != null
+    }
+
+}

kubernetes/src/main/java/io/kubernetes/client/gson/V1StatusPreProcessor.java

@@ -0,0 +1,48 @@
+/*
+Copyright 2020 The Kubernetes Authors.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package io.kubernetes.client.gson;
+
+import com.google.gson.Gson;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import io.gsonfire.PreProcessor;
+import io.kubernetes.client.openapi.models.V1Status;
+
+/** Suppresses runtime exceptions due to https://github.com/kubernetes-client/java/issues/86. */
+public class V1StatusPreProcessor implements PreProcessor<V1Status> {
+
+  @Override
+  public void preDeserialize(Class<? extends V1Status> aClass, JsonElement jsonElement, Gson gson) {
+    if (isLegitKubernetesStatus(jsonElement)) {
+      return;
+    }
+
+    JsonObject obj = jsonElement.getAsJsonObject();
+    JsonElement statusField = obj.get("status");
+    if (statusField != null && statusField.isJsonObject()) {
+      obj.addProperty("status", (String) null);
+    }
+  }
+
+  private static boolean isLegitKubernetesStatus(JsonElement jsonElement) {
+    String apiVersion =
+        jsonElement.getAsJsonObject().get("apiVersion") != null
+            ? jsonElement.getAsJsonObject().get("apiVersion").getAsString()
+            : null;
+    String kind =
+        jsonElement.getAsJsonObject().get("kind") != null
+            ? jsonElement.getAsJsonObject().get("kind").getAsString()
+            : null;
+    return "v1".equals(apiVersion) && "Status".equals(kind);
+  }
+}

kubernetes/src/main/java/io/kubernetes/client/openapi/JSON.java

@@ -20,6 +20,8 @@
 import com.google.gson.stream.JsonReader;
 import com.google.gson.stream.JsonWriter;
 import io.gsonfire.GsonFireBuilder;
+import io.kubernetes.client.gson.V1StatusPreProcessor;
+import io.kubernetes.client.openapi.models.V1Status;
 import java.io.IOException;
 import java.io.StringReader;
 import java.lang.reflect.Type;
@@ -46,7 +48,10 @@ public class JSON {
 
   public static GsonBuilder createGson() {
     GsonFireBuilder fireBuilder = new GsonFireBuilder();
-    GsonBuilder builder = fireBuilder.createGsonBuilder();
+    GsonBuilder builder =
+        fireBuilder
+            .registerPreProcessor(V1Status.class, new V1StatusPreProcessor())
+            .createGsonBuilder();
     return builder;
   }
 

kubernetes/src/test/java/io/kubernetes/client/gson/V1StatusJsonDeserializerTest.java

@@ -0,0 +1,54 @@
+/*
+Copyright 2020 The Kubernetes Authors.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package io.kubernetes.client.gson;
+
+import static org.junit.Assert.assertNotNull;
+
+import com.google.gson.Gson;
+import io.gsonfire.GsonFireBuilder;
+import io.kubernetes.client.openapi.models.V1Status;
+import org.junit.Test;
+
+public class V1StatusJsonDeserializerTest {
+
+  private final Gson gson =
+      new GsonFireBuilder()
+          .registerPreProcessor(V1Status.class, new V1StatusPreProcessor())
+          .createGsonBuilder()
+          .create();
+
+  private static final String JSON_DEPLOYMENT =
+      "{\"apiVersion\":\"apps/v1\",\"kind\":\"Deployment\",\"spec\":null,\"status\":{}}";
+  private static final String JSON_STATUS =
+      "{\"apiVersion\":\"v1\",\"kind\":\"Status\",\"status\":\"True\"}";
+  private static final String JSON_STATUS_NULL =
+      "{\"apiVersion\":\"v1\",\"kind\":\"Status\",\"status\":null}";
+
+  @Test
+  public void testDeserializeNormalStatusIntoStatus() {
+    V1Status status = gson.fromJson(JSON_STATUS, V1Status.class);
+    assertNotNull(status);
+  }
+
+  @Test
+  public void testDeserializeNullStatusIntoStatus() {
+    V1Status status = gson.fromJson(JSON_STATUS_NULL, V1Status.class);
+    assertNotNull(status);
+  }
+
+  @Test
+  public void testDeserializeDeploymentIntoStatus() {
+    V1Status status = gson.fromJson(JSON_DEPLOYMENT, V1Status.class);
+    assertNotNull(status);
+  }
+}