Correctly serialize and deserialize labels and annotations

Labels and annotations need to be serialized under the `metadata` key.

cloudfoundry-operations/src/main/java/org/cloudfoundry/operations/applications/ApplicationManifestUtilsV3.java

@@ -147,13 +147,19 @@ private static ManifestV3Application.Builder toApplicationManifest(Map<String, O
         asList(application, "processes", variables, raw -> getProcess((Map<String, Object>) raw, variables), builder::processe);
         asList(application, "services", variables, raw -> getService(raw, variables), builder::service);
         asList(application, "sidecars", variables, raw -> getSidecar((Map<String, Object>) raw, variables), builder::sidecar);
-        as(application, "labels", variables, Map.class::cast, builder::labels);
-        as(application, "annotations", variables, Map.class::cast, builder::annotations);
+        as(application, "metadata", variables, raw -> getMetadata((Map<String, Object>)raw, variables), builder::metadata);
         asBoolean(application, "default-route", variables, builder::defaultRoute);
 
         return builder;
     }
 
+    private static ManifestV3Metadata getMetadata(Map<String, Object> raw, Map<String, String> variables) {
+        ManifestV3Metadata.Builder builder = ManifestV3Metadata.builder();
+        asMapOfStringString(raw, "labels", variables, builder::label);
+        asMapOfStringString(raw, "annotations", variables, builder::annotation);
+        return builder.build();
+    }
+
     private static ManifestV3Sidecar getSidecar(Map<String, Object> raw, Map<String, String> variables) {
         ManifestV3Sidecar.Builder builder = ManifestV3Sidecar.builder();
 
@@ -210,8 +216,7 @@ private static Map<String, Object> toApplicationYaml(ManifestV3Application appli
         putIfPresent(yaml, "default-route", application.getDefaultRoute());
         putIfPresent(yaml, "services", convertCollection(application.getServices(), ApplicationManifestUtilsV3::toServiceYaml));
         putIfPresent(yaml, "sidecars", convertCollection(application.getSidecars(), ApplicationManifestUtilsV3::toSidecarsYaml));
-        putIfPresent(yaml, "labels", application.getLabels());
-        putIfPresent(yaml, "annotations", application.getAnnotations());
+        putIfPresent(yaml, "metadata", application.getMetadata(), ApplicationManifestUtilsV3::toMetadataYaml);
         return yaml;
     }
 
@@ -248,4 +253,12 @@ private static Map<String, Object> toProcessYaml(ManifestV3Process process) {
         putIfPresent(yaml, "timeout", process.getTimeout());
         return yaml;
     }
+
+    private static Map<String, Object> toMetadataYaml(ManifestV3Metadata metadata) {
+        if (metadata == null) return null;
+        Map<String, Object> yaml = new TreeMap<>();
+        putIfPresent(yaml, "annotations", metadata.getAnnotations());
+        putIfPresent(yaml, "labels", metadata.getLabels());
+        return yaml;
+    }
 }

cloudfoundry-operations/src/main/java/org/cloudfoundry/operations/applications/_ManifestV3Application.java

@@ -32,25 +32,16 @@
 abstract class _ManifestV3Application extends _ApplicationManifestCommon {
 
     /**
-     * The annotations configured for this application
+     * The metadata configured for this application. May contain labels and annotations
      */
-    @AllowNulls
     @Nullable
-    abstract Map<String, String> getAnnotations();
-
+    abstract ManifestV3Metadata getMetadata();
     /**
      * Generate a default route based on the application name
      */
     @Nullable
     abstract Boolean getDefaultRoute();
 
-    /**
-     * The labels configured for this application
-     */
-    @AllowNulls
-    @Nullable
-    abstract Map<String, String> getLabels();
-
     /**
      * The collection of processes configured for this application
      */

cloudfoundry-operations/src/main/java/org/cloudfoundry/operations/applications/_ManifestV3Metadata.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2013-2021 the original author or 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 org.cloudfoundry.operations.applications;
+
+
+import org.cloudfoundry.AllowNulls;
+import org.cloudfoundry.Nullable;
+import org.immutables.value.Value;
+
+import java.util.Map;
+
+
+@Value.Immutable
+abstract class _ManifestV3Metadata {
+
+    @AllowNulls
+    @Nullable
+    abstract Map<String, String> getAnnotations();
+
+    @AllowNulls
+    @Nullable
+    abstract Map<String, String> getLabels();
+}