HSEARCH-5164 Introduce a new dialect to always pass the index_options…

….type=hnsw

backend/elasticsearch/src/main/java/org/hibernate/search/backend/elasticsearch/dialect/impl/ElasticsearchDialectFactory.java

@@ -13,6 +13,7 @@
 import org.hibernate.search.backend.elasticsearch.ElasticsearchVersion;
 import org.hibernate.search.backend.elasticsearch.dialect.model.impl.Elasticsearch7ModelDialect;
 import org.hibernate.search.backend.elasticsearch.dialect.model.impl.Elasticsearch812ModelDialect;
+import org.hibernate.search.backend.elasticsearch.dialect.model.impl.Elasticsearch814ModelDialect;
 import org.hibernate.search.backend.elasticsearch.dialect.model.impl.Elasticsearch8ModelDialect;
 import org.hibernate.search.backend.elasticsearch.dialect.model.impl.ElasticsearchModelDialect;
 import org.hibernate.search.backend.elasticsearch.dialect.model.impl.OpenSearch1ModelDialect;
@@ -104,7 +105,11 @@ else if ( major == 7 ) {
 			if ( major == 8 && ( minorOptional.isEmpty() || minorOptional.getAsInt() < 12 ) ) {
 				return new Elasticsearch8ModelDialect();
 			}
-			return new Elasticsearch812ModelDialect();
+			if ( major == 8 && minorOptional.getAsInt() < 14 ) {
+				return new Elasticsearch812ModelDialect();
+			}
+
+			return new Elasticsearch814ModelDialect();
 		}
 	}
 

backend/elasticsearch/src/main/java/org/hibernate/search/backend/elasticsearch/dialect/model/impl/Elasticsearch814ModelDialect.java

@@ -0,0 +1,30 @@
+/*
+ * Hibernate Search, full-text search for your domain model
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later
+ * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
+ */
+package org.hibernate.search.backend.elasticsearch.dialect.model.impl;
+
+import org.hibernate.search.backend.elasticsearch.types.dsl.provider.impl.Elasticsearch814IndexFieldTypeFactoryProvider;
+import org.hibernate.search.backend.elasticsearch.types.dsl.provider.impl.ElasticsearchIndexFieldTypeFactoryProvider;
+import org.hibernate.search.backend.elasticsearch.validation.impl.Elasticsearch812PropertyMappingValidatorProvider;
+import org.hibernate.search.backend.elasticsearch.validation.impl.ElasticsearchPropertyMappingValidatorProvider;
+
+import com.google.gson.Gson;
+
+/**
+ * The model dialect for Elasticsearch 8.14+.
+ */
+public class Elasticsearch814ModelDialect implements ElasticsearchModelDialect {
+
+	@Override
+	public ElasticsearchIndexFieldTypeFactoryProvider createIndexTypeFieldFactoryProvider(Gson userFacingGson) {
+		return new Elasticsearch814IndexFieldTypeFactoryProvider( userFacingGson );
+	}
+
+	@Override
+	public ElasticsearchPropertyMappingValidatorProvider createElasticsearchPropertyMappingValidatorProvider() {
+		return new Elasticsearch812PropertyMappingValidatorProvider();
+	}
+}

backend/elasticsearch/src/main/java/org/hibernate/search/backend/elasticsearch/types/dsl/provider/impl/Elasticsearch812IndexFieldTypeFactoryProvider.java

@@ -12,7 +12,7 @@
 import com.google.gson.Gson;
 
 /**
- * The index field type factory provider for ES8.12+.
+ * The index field type factory provider for ES8.12-8.13.
  */
 public class Elasticsearch812IndexFieldTypeFactoryProvider extends AbstractIndexFieldTypeFactoryProvider {
 

backend/elasticsearch/src/main/java/org/hibernate/search/backend/elasticsearch/types/dsl/provider/impl/Elasticsearch814IndexFieldTypeFactoryProvider.java

@@ -0,0 +1,30 @@
+/*
+ * Hibernate Search, full-text search for your domain model
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later
+ * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
+ */
+package org.hibernate.search.backend.elasticsearch.types.dsl.provider.impl;
+
+import org.hibernate.search.backend.elasticsearch.types.mapping.impl.Elasticsearch814VectorFieldTypeMappingContributor;
+import org.hibernate.search.backend.elasticsearch.types.mapping.impl.ElasticsearchVectorFieldTypeMappingContributor;
+
+import com.google.gson.Gson;
+
+/**
+ * The index field type factory provider for ES8.14+.
+ */
+public class Elasticsearch814IndexFieldTypeFactoryProvider extends AbstractIndexFieldTypeFactoryProvider {
+
+	private final Elasticsearch814VectorFieldTypeMappingContributor vectorFieldTypeMappingContributor =
+			new Elasticsearch814VectorFieldTypeMappingContributor();
+
+	public Elasticsearch814IndexFieldTypeFactoryProvider(Gson userFacingGson) {
+		super( userFacingGson );
+	}
+
+	@Override
+	protected ElasticsearchVectorFieldTypeMappingContributor vectorFieldTypeMappingContributor() {
+		return vectorFieldTypeMappingContributor;
+	}
+}

backend/elasticsearch/src/main/java/org/hibernate/search/backend/elasticsearch/types/mapping/impl/Elasticsearch812VectorFieldTypeMappingContributor.java

@@ -26,7 +26,7 @@ public void contribute(PropertyMapping mapping, Context context) {
 		if ( resolvedVectorSimilarity != null ) {
 			mapping.setSimilarity( resolvedVectorSimilarity );
 		}
-		if ( context.m() != null || context.efConstruction() != null ) {
+		if ( indexOptionAddCondition( context ) ) {
 			ElasticsearchDenseVectorIndexOptions indexOptions = new ElasticsearchDenseVectorIndexOptions();
 			indexOptions.setType( "hnsw" );
 			if ( context.m() != null ) {
@@ -39,6 +39,10 @@ public void contribute(PropertyMapping mapping, Context context) {
 		}
 	}
 
+	protected boolean indexOptionAddCondition(Context context) {
+		return context.m() != null || context.efConstruction() != null;
+	}
+
 	@Override
 	public <F> void contribute(ElasticsearchIndexValueFieldType.Builder<F> builder, Context context) {
 		builder.queryElementFactory( PredicateTypeKeys.KNN,

backend/elasticsearch/src/main/java/org/hibernate/search/backend/elasticsearch/types/mapping/impl/Elasticsearch814VectorFieldTypeMappingContributor.java

@@ -0,0 +1,16 @@
+/*
+ * Hibernate Search, full-text search for your domain model
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later
+ * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
+ */
+package org.hibernate.search.backend.elasticsearch.types.mapping.impl;
+
+public class Elasticsearch814VectorFieldTypeMappingContributor extends Elasticsearch812VectorFieldTypeMappingContributor {
+
+	@Override
+	protected boolean indexOptionAddCondition(Context context) {
+		// we want to always add index options and in particular include `hnsw` type.
+		return true;
+	}
+}

backend/elasticsearch/src/test/java/org/hibernate/search/backend/elasticsearch/dialect/impl/ElasticsearchDialectFactoryTest.java

@@ -16,6 +16,7 @@
 import org.hibernate.search.backend.elasticsearch.ElasticsearchVersion;
 import org.hibernate.search.backend.elasticsearch.dialect.model.impl.Elasticsearch7ModelDialect;
 import org.hibernate.search.backend.elasticsearch.dialect.model.impl.Elasticsearch812ModelDialect;
+import org.hibernate.search.backend.elasticsearch.dialect.model.impl.Elasticsearch814ModelDialect;
 import org.hibernate.search.backend.elasticsearch.dialect.model.impl.Elasticsearch8ModelDialect;
 import org.hibernate.search.backend.elasticsearch.dialect.model.impl.ElasticsearchModelDialect;
 import org.hibernate.search.backend.elasticsearch.dialect.model.impl.OpenSearch1ModelDialect;
@@ -263,19 +264,19 @@ public static List<? extends Arguments> params() {
 				),
 				success(
 						ElasticsearchDistributionName.ELASTIC, "8.14.0", "8.14.0",
-						Elasticsearch812ModelDialect.class, Elasticsearch81ProtocolDialect.class
+						Elasticsearch814ModelDialect.class, Elasticsearch81ProtocolDialect.class
 				),
 				successWithWarning(
 						ElasticsearchDistributionName.ELASTIC, "8.15", "8.15.0",
-						Elasticsearch812ModelDialect.class, Elasticsearch81ProtocolDialect.class
+						Elasticsearch814ModelDialect.class, Elasticsearch81ProtocolDialect.class
 				),
 				successWithWarning(
 						ElasticsearchDistributionName.ELASTIC, "8.15.0", "8.15.0",
-						Elasticsearch812ModelDialect.class, Elasticsearch81ProtocolDialect.class
+						Elasticsearch814ModelDialect.class, Elasticsearch81ProtocolDialect.class
 				),
 				successWithWarning(
 						ElasticsearchDistributionName.ELASTIC, "9.0.0", "9.0.0",
-						Elasticsearch812ModelDialect.class, Elasticsearch81ProtocolDialect.class
+						Elasticsearch814ModelDialect.class, Elasticsearch81ProtocolDialect.class
 				),
 				success(
 						ElasticsearchDistributionName.OPENSEARCH, "1", "1.3.1",