Add support for plugin-defined custom components in union types

java-client/src/main/java/co/elastic/clients/elasticsearch/_types/SortOptions.java

@@ -56,9 +56,6 @@
 @JsonpDeserializable
 public class SortOptions implements TaggedUnion<SortOptions.Kind, Object>, JsonpSerializable {
 
-	/**
-	 * {@link SortOptions} variant kinds.
-	 */
 	/**
 	 * {@link SortOptions} variant kinds.
 	 * 

java-client/src/main/java/co/elastic/clients/elasticsearch/_types/Transform.java

@@ -53,9 +53,6 @@
 @JsonpDeserializable
 public class Transform implements TaggedUnion<Transform.Kind, Object>, JsonpSerializable {
 
-	/**
-	 * {@link Transform} variant kinds.
-	 */
 	/**
 	 * {@link Transform} variant kinds.
 	 * 

java-client/src/main/java/co/elastic/clients/elasticsearch/_types/aggregations/Aggregate.java

@@ -24,6 +24,7 @@
 package co.elastic.clients.elasticsearch._types.aggregations;
 
 import co.elastic.clients.json.ExternallyTaggedUnion;
+import co.elastic.clients.json.JsonData;
 import co.elastic.clients.json.JsonEnum;
 import co.elastic.clients.json.JsonpDeserializable;
 import co.elastic.clients.json.JsonpDeserializer;
@@ -34,9 +35,10 @@
 import co.elastic.clients.util.ApiTypeHelper;
 import co.elastic.clients.util.ObjectBuilder;
 import co.elastic.clients.util.ObjectBuilderBase;
-import co.elastic.clients.util.TaggedUnion;
+import co.elastic.clients.util.OpenTaggedUnion;
 import co.elastic.clients.util.TaggedUnionUtils;
 import jakarta.json.stream.JsonGenerator;
+import java.lang.Object;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Objects;
@@ -52,11 +54,8 @@
  *      specification</a>
  */
 
-public class Aggregate implements TaggedUnion<Aggregate.Kind, AggregateVariant>, JsonpSerializable {
+public class Aggregate implements OpenTaggedUnion<Aggregate.Kind, Object>, JsonpSerializable {
 
-	/**
-	 * {@link Aggregate} variant kinds.
-	 */
 	/**
 	 * {@link Aggregate} variant kinds.
 	 * 
@@ -198,6 +197,9 @@ public enum Kind implements JsonEnum {
 
 		WeightedAvg("weighted_avg"),
 
+		/** A custom {@code Aggregate} defined by a plugin */
+		_Custom(null)
+
 		;
 
 		private final String jsonValue;
@@ -213,36 +215,48 @@ public String jsonValue() {
 	}
 
 	private final Kind _kind;
-	private final AggregateVariant _value;
+	private final Object _value;
 
 	@Override
 	public final Kind _kind() {
 		return _kind;
 	}
 
 	@Override
-	public final AggregateVariant _get() {
+	public final Object _get() {
 		return _value;
 	}
 
 	public Aggregate(AggregateVariant value) {
 
 		this._kind = ApiTypeHelper.requireNonNull(value._aggregateKind(), this, "<variant kind>");
 		this._value = ApiTypeHelper.requireNonNull(value, this, "<variant value>");
+		this._customKind = null;
 
 	}
 
 	private Aggregate(Builder builder) {
 
 		this._kind = ApiTypeHelper.requireNonNull(builder._kind, builder, "<variant kind>");
 		this._value = ApiTypeHelper.requireNonNull(builder._value, builder, "<variant value>");
+		this._customKind = builder._customKind;
 
 	}
 
 	public static Aggregate of(Function<Builder, ObjectBuilder<Aggregate>> fn) {
 		return fn.apply(new Builder()).build();
 	}
 
+	/**
+	 * Build a custom plugin-defined {@code Aggregate}, given its kind and some JSON
+	 * data
+	 */
+	public Aggregate(String kind, JsonData value) {
+		this._kind = Kind._Custom;
+		this._value = value;
+		this._customKind = kind;
+	}
+
 	/**
 	 * Is this variant instance of kind {@code adjacency_matrix}?
 	 */
@@ -1379,6 +1393,35 @@ public WeightedAvgAggregate weightedAvg() {
 		return TaggedUnionUtils.get(this, Kind.WeightedAvg);
 	}
 
+	@Nullable
+	private final String _customKind;
+
+	/**
+	 * Is this a custom {@code Aggregate} defined by a plugin?
+	 */
+	public boolean _isCustom() {
+		return _kind == Kind._Custom;
+	}
+
+	/**
+	 * Get the actual kind when {@code _kind()} equals {@link Kind#_Custom}
+	 * (plugin-defined variant).
+	 */
+	@Nullable
+	public final String _customKind() {
+		return _customKind;
+	}
+
+	/**
+	 * Get the custom plugin-defined variant value.
+	 *
+	 * @throws IllegalStateException
+	 *             if the current variant is not {@link Kind#_Custom}.
+	 */
+	public JsonData _custom() {
+		return TaggedUnionUtils.get(this, Kind._Custom);
+	}
+
 	@Override
 	public void serialize(JsonGenerator generator, JsonpMapper mapper) {
 
@@ -1393,7 +1436,8 @@ public String toString() {
 
 	public static class Builder extends ObjectBuilderBase implements ObjectBuilder<Aggregate> {
 		private Kind _kind;
-		private AggregateVariant _value;
+		private Object _value;
+		private String _customKind;
 
 		public ObjectBuilder<Aggregate> adjacencyMatrix(AdjacencyMatrixAggregate v) {
 			this._kind = Kind.AdjacencyMatrix;
@@ -2109,6 +2153,22 @@ public ObjectBuilder<Aggregate> weightedAvg(
 			return this.weightedAvg(fn.apply(new WeightedAvgAggregate.Builder()).build());
 		}
 
+		/**
+		 * Define this {@code Aggregate} as a plugin-defined variant.
+		 *
+		 * @param name
+		 *            the plugin-defined identifier
+		 * @param data
+		 *            the data for this custom {@code Aggregate}. It is converted
+		 *            internally to {@link JsonData}.
+		 */
+		public ObjectBuilder<Aggregate> _custom(String name, Object data) {
+			this._kind = Kind._Custom;
+			this._customKind = name;
+			this._value = JsonData.of(data);
+			return this;
+		}
+
 		public Aggregate build() {
 			_checkSingleUse();
 			return new Aggregate(this);
@@ -2187,7 +2247,7 @@ public Aggregate build() {
 		deserializers.put("variable_width_histogram", VariableWidthHistogramAggregate._DESERIALIZER);
 		deserializers.put("weighted_avg", WeightedAvgAggregate._DESERIALIZER);
 
-		_TYPED_KEYS_DESERIALIZER = new ExternallyTaggedUnion.Deserializer<>(deserializers,
-				(name, value) -> new Aggregate(value)).typedKeys();
+		_TYPED_KEYS_DESERIALIZER = new ExternallyTaggedUnion.Deserializer<>(deserializers, Aggregate::new,
+				Aggregate::new).typedKeys();
 	}
 }

java-client/src/main/java/co/elastic/clients/elasticsearch/_types/aggregations/Aggregation.java

@@ -35,7 +35,7 @@
 import co.elastic.clients.json.ObjectDeserializer;
 import co.elastic.clients.util.ApiTypeHelper;
 import co.elastic.clients.util.ObjectBuilder;
-import co.elastic.clients.util.TaggedUnion;
+import co.elastic.clients.util.OpenTaggedUnion;
 import co.elastic.clients.util.TaggedUnionUtils;
 import co.elastic.clients.util.WithJsonObjectBuilderBase;
 import jakarta.json.stream.JsonGenerator;
@@ -55,11 +55,8 @@
  *      specification</a>
  */
 @JsonpDeserializable
-public class Aggregation implements TaggedUnion<Aggregation.Kind, Object>, JsonpSerializable {
+public class Aggregation implements OpenTaggedUnion<Aggregation.Kind, Object>, JsonpSerializable {
 
-	/**
-	 * {@link Aggregation} variant kinds.
-	 */
 	/**
 	 * {@link Aggregation} variant kinds.
 	 * 
@@ -215,6 +212,9 @@ public enum Kind implements JsonEnum {
 
 		VariableWidthHistogram("variable_width_histogram"),
 
+		/** A custom {@code Aggregation} defined by a plugin */
+		_Custom(null)
+
 		;
 
 		private final String jsonValue;
@@ -250,6 +250,7 @@ public Aggregation(AggregationVariant value) {
 
 		this._kind = ApiTypeHelper.requireNonNull(value._aggregationKind(), this, "<variant kind>");
 		this._value = ApiTypeHelper.requireNonNull(value, this, "<variant value>");
+		this._customKind = null;
 
 		this.aggregations = null;
 		this.meta = null;
@@ -260,6 +261,7 @@ private Aggregation(Builder builder) {
 
 		this._kind = ApiTypeHelper.requireNonNull(builder._kind, builder, "<variant kind>");
 		this._value = ApiTypeHelper.requireNonNull(builder._value, builder, "<variant value>");
+		this._customKind = builder._customKind;
 
 		this.aggregations = ApiTypeHelper.unmodifiable(builder.aggregations);
 		this.meta = ApiTypeHelper.unmodifiable(builder.meta);
@@ -1544,6 +1546,35 @@ public VariableWidthHistogramAggregation variableWidthHistogram() {
 		return TaggedUnionUtils.get(this, Kind.VariableWidthHistogram);
 	}
 
+	@Nullable
+	private final String _customKind;
+
+	/**
+	 * Is this a custom {@code Aggregation} defined by a plugin?
+	 */
+	public boolean _isCustom() {
+		return _kind == Kind._Custom;
+	}
+
+	/**
+	 * Get the actual kind when {@code _kind()} equals {@link Kind#_Custom}
+	 * (plugin-defined variant).
+	 */
+	@Nullable
+	public final String _customKind() {
+		return _customKind;
+	}
+
+	/**
+	 * Get the custom plugin-defined variant value.
+	 *
+	 * @throws IllegalStateException
+	 *             if the current variant is not {@link Kind#_Custom}.
+	 */
+	public JsonData _custom() {
+		return TaggedUnionUtils.get(this, Kind._Custom);
+	}
+
 	@Override
 	@SuppressWarnings("unchecked")
 	public void serialize(JsonGenerator generator, JsonpMapper mapper) {
@@ -1573,7 +1604,7 @@ public void serialize(JsonGenerator generator, JsonpMapper mapper) {
 
 		}
 
-		generator.writeKey(_kind.jsonValue());
+		generator.writeKey(_kind == Kind._Custom ? _customKind : _kind.jsonValue());
 		if (_value instanceof JsonpSerializable) {
 			((JsonpSerializable) _value).serialize(generator, mapper);
 		}
@@ -1590,6 +1621,7 @@ public String toString() {
 	public static class Builder extends WithJsonObjectBuilderBase<Builder> {
 		private Kind _kind;
 		private Object _value;
+		private String _customKind;
 
 		@Nullable
 		private Map<String, Aggregation> aggregations;
@@ -2438,6 +2470,22 @@ public ContainerBuilder variableWidthHistogram(
 			return this.variableWidthHistogram(fn.apply(new VariableWidthHistogramAggregation.Builder()).build());
 		}
 
+		/**
+		 * Define this {@code Aggregation} as a plugin-defined variant.
+		 *
+		 * @param name
+		 *            the plugin-defined identifier
+		 * @param data
+		 *            the data for this custom {@code Aggregation}. It is converted
+		 *            internally to {@link JsonData}.
+		 */
+		public ContainerBuilder _custom(String name, Object data) {
+			this._kind = Kind._Custom;
+			this._customKind = name;
+			this._value = JsonData.of(data);
+			return new ContainerBuilder();
+		}
+
 		protected Aggregation build() {
 			_checkSingleUse();
 			return new Aggregation(this);
@@ -2589,6 +2637,11 @@ protected static void setupAggregationDeserializer(ObjectDeserializer<Builder> o
 		op.add(Builder::variableWidthHistogram, VariableWidthHistogramAggregation._DESERIALIZER,
 				"variable_width_histogram");
 
+		op.setUnknownFieldHandler((builder, name, parser, mapper) -> {
+			JsonpUtils.ensureCustomVariantsAllowed(parser, mapper);
+			builder._custom(name, JsonData._DESERIALIZER.deserialize(parser, mapper));
+		});
+
 	}
 
 	public static final JsonpDeserializer<Aggregation> _DESERIALIZER = ObjectBuilderDeserializer.lazy(Builder::new,

java-client/src/main/java/co/elastic/clients/elasticsearch/_types/aggregations/InferenceConfig.java

@@ -55,9 +55,6 @@
 @JsonpDeserializable
 public class InferenceConfig implements TaggedUnion<InferenceConfig.Kind, Object>, JsonpSerializable {
 
-	/**
-	 * {@link InferenceConfig} variant kinds.
-	 */
 	/**
 	 * {@link InferenceConfig} variant kinds.
 	 * 

java-client/src/main/java/co/elastic/clients/elasticsearch/_types/aggregations/MovingAverageAggregation.java

@@ -55,9 +55,6 @@ public class MovingAverageAggregation
 			TaggedUnion<MovingAverageAggregation.Kind, MovingAverageAggregationVariant>,
 			JsonpSerializable {
 
-	/**
-	 * {@link MovingAverageAggregation} variant kinds.
-	 */
 	/**
 	 * {@link MovingAverageAggregation} variant kinds.
 	 *