fix: update gapic-generator-java with mock service generation fixes (#…

…960)

* chore(deps): upgrade gapic-generator-java to 2.8.0 and update gax-java to 2.18.1

PiperOrigin-RevId: 450543911

Source-Link: googleapis/googleapis@5528344

Source-Link: googleapis/googleapis-gen@9f6775c
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiOWY2Nzc1Y2FiMTk1ODk4MmI4ODk2N2E0M2U1ZTgwNmFmMGYxMzVkYiJ9

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* chore: expose new TTL / Database Admin experimental API

PiperOrigin-RevId: 451252826

Source-Link: googleapis/googleapis@dea7c80

Source-Link: googleapis/googleapis-gen@ac376d0
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiYWMzNzZkMDVjYjI4MDhlZTI2ZDQ1ZTJjM2EyMGY2ZmQ4NTJlNjc2ZCJ9

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* feat: expose read_time fields in Firestore PartitionQuery and ListCollectionIds, currently only available in private preview

PiperOrigin-RevId: 453719952

Source-Link: googleapis/googleapis@bdea286

Source-Link: googleapis/googleapis-gen@03f0c73
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* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* chore: Integrate new gapic-generator-java and rules_gapic

PiperOrigin-RevId: 454027580

Source-Link: googleapis/googleapis@1b22277

Source-Link: googleapis/googleapis-gen@e04cea2
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* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* feat: Enable REST transport for most of Java and Go clients

PiperOrigin-RevId: 456641589

Source-Link: googleapis/googleapis@8a251f5

Source-Link: googleapis/googleapis-gen@4ca52a5
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* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* Update pom.xml

* chore: add http deps

* fix: update gapic-generator-java with mock service generation fixes

PiperOrigin-RevId: 457524730

Source-Link: googleapis/googleapis@917e7f2

Source-Link: googleapis/googleapis-gen@2497f9a
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* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>
Co-authored-by: Neenu Shaji <Neenu1995@users.noreply.github.com>
Co-authored-by: Neenu1995 <neenushaji@google.com>
Co-authored-by: Alice <65933803+alicejli@users.noreply.github.com>

google-cloud-firestore-admin/pom.xml

@@ -54,6 +54,10 @@
       <groupId>com.google.api</groupId>
       <artifactId>gax-grpc</artifactId>
     </dependency>
+    <dependency>
+      <groupId>com.google.api</groupId>
+      <artifactId>gax-httpjson</artifactId>
+    </dependency>
     <dependency>
       <groupId>com.google.guava</groupId>
       <artifactId>guava</artifactId>
@@ -75,12 +79,24 @@
       <scope>test</scope>
     </dependency>
     <!-- Need testing utility classes for generated gRPC clients tests -->
+    <dependency>
+      <groupId>com.google.api</groupId>
+      <artifactId>gax</artifactId>
+      <classifier>testlib</classifier>
+      <scope>test</scope>
+    </dependency>
     <dependency>
       <groupId>com.google.api</groupId>
       <artifactId>gax-grpc</artifactId>
       <classifier>testlib</classifier>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>com.google.api</groupId>
+      <artifactId>gax-httpjson</artifactId>
+      <classifier>testlib</classifier>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
 
   <reporting>

google-cloud-firestore-admin/src/main/java/com/google/cloud/firestore/v1/FirestoreAdminClient.java

@@ -20,6 +20,7 @@
 import com.google.api.core.ApiFutures;
 import com.google.api.core.BetaApi;
 import com.google.api.gax.core.BackgroundResource;
+import com.google.api.gax.httpjson.longrunning.OperationsClient;
 import com.google.api.gax.longrunning.OperationFuture;
 import com.google.api.gax.paging.AbstractFixedSizeCollection;
 import com.google.api.gax.paging.AbstractPage;
@@ -60,7 +61,6 @@
 import com.google.firestore.admin.v1.UpdateDatabaseRequest;
 import com.google.firestore.admin.v1.UpdateFieldRequest;
 import com.google.longrunning.Operation;
-import com.google.longrunning.OperationsClient;
 import com.google.protobuf.Empty;
 import com.google.protobuf.FieldMask;
 import java.io.IOException;
@@ -157,13 +157,28 @@
  * FirestoreAdminClient firestoreAdminClient = FirestoreAdminClient.create(firestoreAdminSettings);
  * }</pre>
  *
+ * <p>To use REST (HTTP1.1/JSON) transport (instead of gRPC) for sending and receiving requests over
+ * the wire:
+ *
+ * <pre>{@code
+ * // This snippet has been automatically generated for illustrative purposes only.
+ * // It may require modifications to work in your environment.
+ * FirestoreAdminSettings firestoreAdminSettings =
+ *     FirestoreAdminSettings.newBuilder()
+ *         .setTransportChannelProvider(
+ *             FirestoreAdminSettings.defaultHttpJsonTransportProviderBuilder().build())
+ *         .build();
+ * FirestoreAdminClient firestoreAdminClient = FirestoreAdminClient.create(firestoreAdminSettings);
+ * }</pre>
+ *
  * <p>Please refer to the GitHub repository's samples for more quickstart code snippets.
  */
 @Generated("by gapic-generator-java")
 public class FirestoreAdminClient implements BackgroundResource {
   private final FirestoreAdminSettings settings;
   private final FirestoreAdminStub stub;
-  private final OperationsClient operationsClient;
+  private final OperationsClient httpJsonOperationsClient;
+  private final com.google.longrunning.OperationsClient operationsClient;
 
   /** Constructs an instance of FirestoreAdminClient with default settings. */
   public static final FirestoreAdminClient create() throws IOException {
@@ -183,7 +198,6 @@ public static final FirestoreAdminClient create(FirestoreAdminSettings settings)
    * Constructs an instance of FirestoreAdminClient, using the given stub for making calls. This is
    * for advanced usage - prefer using create(FirestoreAdminSettings).
    */
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public static final FirestoreAdminClient create(FirestoreAdminStub stub) {
     return new FirestoreAdminClient(stub);
   }
@@ -196,21 +210,23 @@ public static final FirestoreAdminClient create(FirestoreAdminStub stub) {
   protected FirestoreAdminClient(FirestoreAdminSettings settings) throws IOException {
     this.settings = settings;
     this.stub = ((FirestoreAdminStubSettings) settings.getStubSettings()).createStub();
-    this.operationsClient = OperationsClient.create(this.stub.getOperationsStub());
+    this.operationsClient =
+        com.google.longrunning.OperationsClient.create(this.stub.getOperationsStub());
+    this.httpJsonOperationsClient = OperationsClient.create(this.stub.getHttpJsonOperationsStub());
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   protected FirestoreAdminClient(FirestoreAdminStub stub) {
     this.settings = null;
     this.stub = stub;
-    this.operationsClient = OperationsClient.create(this.stub.getOperationsStub());
+    this.operationsClient =
+        com.google.longrunning.OperationsClient.create(this.stub.getOperationsStub());
+    this.httpJsonOperationsClient = OperationsClient.create(this.stub.getHttpJsonOperationsStub());
   }
 
   public final FirestoreAdminSettings getSettings() {
     return settings;
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public FirestoreAdminStub getStub() {
     return stub;
   }
@@ -219,10 +235,19 @@ public FirestoreAdminStub getStub() {
    * Returns the OperationsClient that can be used to query the status of a long-running operation
    * returned by another API method call.
    */
-  public final OperationsClient getOperationsClient() {
+  public final com.google.longrunning.OperationsClient getOperationsClient() {
     return operationsClient;
   }
 
+  /**
+   * Returns the OperationsClient that can be used to query the status of a long-running operation
+   * returned by another API method call.
+   */
+  @BetaApi
+  public final OperationsClient getHttpJsonOperationsClient() {
+    return httpJsonOperationsClient;
+  }
+
   // AUTO-GENERATED DOCUMENTATION AND METHOD.
   /**
    * Creates a composite index. This returns a
@@ -518,7 +543,7 @@ public final ListIndexesPagedResponse listIndexes(ListIndexesRequest request) {
    *           .build();
    *   while (true) {
    *     ListIndexesResponse response = firestoreAdminClient.listIndexesCallable().call(request);
-   *     for (Index element : response.getResponsesList()) {
+   *     for (Index element : response.getIndexesList()) {
    *       // doThingsWith(element);
    *     }
    *     String nextPageToken = response.getNextPageToken();
@@ -1145,7 +1170,7 @@ public final UnaryCallable<ListFieldsRequest, ListFieldsPagedResponse> listField
    *           .build();
    *   while (true) {
    *     ListFieldsResponse response = firestoreAdminClient.listFieldsCallable().call(request);
-   *     for (Field element : response.getResponsesList()) {
+   *     for (Field element : response.getFieldsList()) {
    *       // doThingsWith(element);
    *     }
    *     String nextPageToken = response.getNextPageToken();

google-cloud-firestore-admin/src/main/java/com/google/cloud/firestore/v1/FirestoreAdminSettings.java

@@ -24,6 +24,7 @@
 import com.google.api.gax.core.GoogleCredentialsProvider;
 import com.google.api.gax.core.InstantiatingExecutorProvider;
 import com.google.api.gax.grpc.InstantiatingGrpcChannelProvider;
+import com.google.api.gax.httpjson.InstantiatingHttpJsonChannelProvider;
 import com.google.api.gax.rpc.ApiClientHeaderProvider;
 import com.google.api.gax.rpc.ClientContext;
 import com.google.api.gax.rpc.ClientSettings;
@@ -217,11 +218,18 @@ public static GoogleCredentialsProvider.Builder defaultCredentialsProviderBuilde
     return FirestoreAdminStubSettings.defaultCredentialsProviderBuilder();
   }
 
-  /** Returns a builder for the default ChannelProvider for this service. */
+  /** Returns a builder for the default gRPC ChannelProvider for this service. */
   public static InstantiatingGrpcChannelProvider.Builder defaultGrpcTransportProviderBuilder() {
     return FirestoreAdminStubSettings.defaultGrpcTransportProviderBuilder();
   }
 
+  /** Returns a builder for the default REST ChannelProvider for this service. */
+  @BetaApi
+  public static InstantiatingHttpJsonChannelProvider.Builder
+      defaultHttpJsonTransportProviderBuilder() {
+    return FirestoreAdminStubSettings.defaultHttpJsonTransportProviderBuilder();
+  }
+
   public static TransportChannelProvider defaultTransportChannelProvider() {
     return FirestoreAdminStubSettings.defaultTransportChannelProvider();
   }
@@ -231,11 +239,17 @@ public static ApiClientHeaderProvider.Builder defaultApiClientHeaderProviderBuil
     return FirestoreAdminStubSettings.defaultApiClientHeaderProviderBuilder();
   }
 
-  /** Returns a new builder for this class. */
+  /** Returns a new gRPC builder for this class. */
   public static Builder newBuilder() {
     return Builder.createDefault();
   }
 
+  /** Returns a new REST builder for this class. */
+  @BetaApi
+  public static Builder newHttpJsonBuilder() {
+    return Builder.createHttpJsonDefault();
+  }
+
   /** Returns a new builder for this class. */
   public static Builder newBuilder(ClientContext clientContext) {
     return new Builder(clientContext);
@@ -273,6 +287,11 @@ private static Builder createDefault() {
       return new Builder(FirestoreAdminStubSettings.newBuilder());
     }
 
+    @BetaApi
+    private static Builder createHttpJsonDefault() {
+      return new Builder(FirestoreAdminStubSettings.newHttpJsonBuilder());
+    }
+
     public FirestoreAdminStubSettings.Builder getStubSettingsBuilder() {
       return ((FirestoreAdminStubSettings.Builder) getStubSettings());
     }

google-cloud-firestore-admin/src/main/java/com/google/cloud/firestore/v1/stub/FirestoreAdminStub.java

@@ -61,7 +61,11 @@
 public abstract class FirestoreAdminStub implements BackgroundResource {
 
   public OperationsStub getOperationsStub() {
-    throw new UnsupportedOperationException("Not implemented: getOperationsStub()");
+    return null;
+  }
+
+  public com.google.api.gax.httpjson.longrunning.stub.OperationsStub getHttpJsonOperationsStub() {
+    return null;
   }
 
   public OperationCallable<CreateIndexRequest, Index, IndexOperationMetadata>

google-cloud-firestore-admin/src/main/java/com/google/cloud/firestore/v1/stub/FirestoreAdminStubSettings.java

@@ -29,6 +29,9 @@
 import com.google.api.gax.grpc.GrpcTransportChannel;
 import com.google.api.gax.grpc.InstantiatingGrpcChannelProvider;
 import com.google.api.gax.grpc.ProtoOperationTransformers;
+import com.google.api.gax.httpjson.GaxHttpJsonProperties;
+import com.google.api.gax.httpjson.HttpJsonTransportChannel;
+import com.google.api.gax.httpjson.InstantiatingHttpJsonChannelProvider;
 import com.google.api.gax.longrunning.OperationSnapshot;
 import com.google.api.gax.longrunning.OperationTimedPollAlgorithm;
 import com.google.api.gax.retrying.RetrySettings;
@@ -349,13 +352,17 @@ public UnaryCallSettings<UpdateDatabaseRequest, Operation> updateDatabaseSetting
     return updateDatabaseOperationSettings;
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public FirestoreAdminStub createStub() throws IOException {
     if (getTransportChannelProvider()
         .getTransportName()
         .equals(GrpcTransportChannel.getGrpcTransportName())) {
       return GrpcFirestoreAdminStub.create(this);
     }
+    if (getTransportChannelProvider()
+        .getTransportName()
+        .equals(HttpJsonTransportChannel.getHttpJsonTransportName())) {
+      return HttpJsonFirestoreAdminStub.create(this);
+    }
     throw new UnsupportedOperationException(
         String.format(
             "Transport not supported: %s", getTransportChannelProvider().getTransportName()));
@@ -388,30 +395,56 @@ public static GoogleCredentialsProvider.Builder defaultCredentialsProviderBuilde
         .setUseJwtAccessWithScope(true);
   }
 
-  /** Returns a builder for the default ChannelProvider for this service. */
+  /** Returns a builder for the default gRPC ChannelProvider for this service. */
   public static InstantiatingGrpcChannelProvider.Builder defaultGrpcTransportProviderBuilder() {
     return InstantiatingGrpcChannelProvider.newBuilder()
         .setMaxInboundMessageSize(Integer.MAX_VALUE);
   }
 
+  /** Returns a builder for the default REST ChannelProvider for this service. */
+  @BetaApi
+  public static InstantiatingHttpJsonChannelProvider.Builder
+      defaultHttpJsonTransportProviderBuilder() {
+    return InstantiatingHttpJsonChannelProvider.newBuilder();
+  }
+
   public static TransportChannelProvider defaultTransportChannelProvider() {
     return defaultGrpcTransportProviderBuilder().build();
   }
 
   @BetaApi("The surface for customizing headers is not stable yet and may change in the future.")
-  public static ApiClientHeaderProvider.Builder defaultApiClientHeaderProviderBuilder() {
+  public static ApiClientHeaderProvider.Builder defaultGrpcApiClientHeaderProviderBuilder() {
     return ApiClientHeaderProvider.newBuilder()
         .setGeneratedLibToken(
             "gapic", GaxProperties.getLibraryVersion(FirestoreAdminStubSettings.class))
         .setTransportToken(
             GaxGrpcProperties.getGrpcTokenName(), GaxGrpcProperties.getGrpcVersion());
   }
 
-  /** Returns a new builder for this class. */
+  @BetaApi("The surface for customizing headers is not stable yet and may change in the future.")
+  public static ApiClientHeaderProvider.Builder defaultHttpJsonApiClientHeaderProviderBuilder() {
+    return ApiClientHeaderProvider.newBuilder()
+        .setGeneratedLibToken(
+            "gapic", GaxProperties.getLibraryVersion(FirestoreAdminStubSettings.class))
+        .setTransportToken(
+            GaxHttpJsonProperties.getHttpJsonTokenName(),
+            GaxHttpJsonProperties.getHttpJsonVersion());
+  }
+
+  public static ApiClientHeaderProvider.Builder defaultApiClientHeaderProviderBuilder() {
+    return FirestoreAdminStubSettings.defaultGrpcApiClientHeaderProviderBuilder();
+  }
+
+  /** Returns a new gRPC builder for this class. */
   public static Builder newBuilder() {
     return Builder.createDefault();
   }
 
+  /** Returns a new REST builder for this class. */
+  public static Builder newHttpJsonBuilder() {
+    return Builder.createHttpJsonDefault();
+  }
+
   /** Returns a new builder for this class. */
   public static Builder newBuilder(ClientContext clientContext) {
     return new Builder(clientContext);
@@ -620,6 +653,19 @@ private static Builder createDefault() {
       return initDefaults(builder);
     }
 
+    private static Builder createHttpJsonDefault() {
+      Builder builder = new Builder(((ClientContext) null));
+
+      builder.setTransportChannelProvider(defaultHttpJsonTransportProviderBuilder().build());
+      builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
+      builder.setInternalHeaderProvider(defaultHttpJsonApiClientHeaderProviderBuilder().build());
+      builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
+
+      return initDefaults(builder);
+    }
+
     private static Builder initDefaults(Builder builder) {
       builder
           .createIndexSettings()