fix(parent/agg): deserialize parent aggregation

Signed-off-by: Roman <[email protected]>

java-client/src/main/java/org/opensearch/client/opensearch/_types/aggregations/Aggregate.java

@@ -136,6 +136,8 @@ public enum Kind implements JsonEnum {
 
         Nested("nested"),
 
+        Parent("parent"),
+
         PercentilesBucket("percentiles_bucket"),
 
         Range("range"),
@@ -2075,6 +2077,7 @@ public Aggregate build() {
         deserializers.put("missing", MissingAggregate._DESERIALIZER);
         deserializers.put("multi_terms", MultiTermsAggregate._DESERIALIZER);
         deserializers.put("nested", NestedAggregate._DESERIALIZER);
+        deserializers.put("parent", ParentAggregate._DESERIALIZER);
         deserializers.put("percentiles_bucket", PercentilesBucketAggregate._DESERIALIZER);
         deserializers.put("range", RangeAggregate._DESERIALIZER);
         deserializers.put("rate", RateAggregate._DESERIALIZER);

java-client/src/main/java/org/opensearch/client/opensearch/_types/aggregations/ParentAggregate.java

@@ -0,0 +1,102 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you 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.
+ */
+
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
+package org.opensearch.client.opensearch._types.aggregations;
+
+import java.util.function.Function;
+import org.opensearch.client.json.JsonpDeserializable;
+import org.opensearch.client.json.JsonpDeserializer;
+import org.opensearch.client.json.ObjectBuilderDeserializer;
+import org.opensearch.client.json.ObjectDeserializer;
+import org.opensearch.client.util.ObjectBuilder;
+
+// typedef: _types.aggregations.ParentAggregate
+
+@JsonpDeserializable
+public class ParentAggregate extends SingleBucketAggregateBase implements AggregateVariant {
+  // ---------------------------------------------------------------------------------------------
+
+  private ParentAggregate(Builder builder) {
+    super(builder);
+
+  }
+
+  public static ParentAggregate of(Function<Builder, ObjectBuilder<ParentAggregate>> fn) {
+    return fn.apply(new Builder()).build();
+  }
+
+  @Override
+  public Aggregate.Kind _aggregateKind() {
+    return Aggregate.Kind.Parent;
+  }
+
+  // ---------------------------------------------------------------------------------------------
+
+  /**
+   * Builder for {@link ParentAggregate}.
+   */
+
+  public static class Builder extends SingleBucketAggregateBase.AbstractBuilder<Builder>
+      implements
+        ObjectBuilder<ParentAggregate> {
+    @Override
+    protected Builder self() {
+      return this;
+    }
+
+    /**
+     * Builds a {@link ParentAggregate}.
+     *
+     * @throws NullPointerException
+     *             if some of the required fields are null.
+     */
+    public ParentAggregate build() {
+      _checkSingleUse();
+
+      return new ParentAggregate(this);
+    }
+  }
+
+  // ---------------------------------------------------------------------------------------------
+
+  /**
+   * Json deserializer for {@link ParentAggregate}
+   */
+  public static final JsonpDeserializer<ParentAggregate> _DESERIALIZER = ObjectBuilderDeserializer
+      .lazy(Builder::new, ParentAggregate::setupParentAggregateDeserializer);
+
+  protected static void setupParentAggregateDeserializer(ObjectDeserializer<ParentAggregate.Builder> op) {
+    SingleBucketAggregateBase.setupSingleBucketAggregateBaseDeserializer(op);
+  }
+
+
+}