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HSEARCH-5426 Adjust the count aggregation DSL
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‎backend/elasticsearch/src/main/java/org/hibernate/search/backend/elasticsearch/document/model/dsl/impl/ElasticsearchIndexRootBuilder.java

Lines changed: 2 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -26,7 +26,7 @@
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import org.hibernate.search.backend.elasticsearch.lowlevel.index.mapping.impl.RoutingType;
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import org.hibernate.search.backend.elasticsearch.lowlevel.index.settings.impl.IndexSettings;
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import org.hibernate.search.backend.elasticsearch.lowlevel.index.settings.impl.PropertyMappingIndexSettingsContributor;
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import org.hibernate.search.backend.elasticsearch.search.aggregation.impl.ElasticsearchCountDocumentAggregation;
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import org.hibernate.search.backend.elasticsearch.search.aggregation.impl.ElasticsearchCountAggregation;
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import org.hibernate.search.backend.elasticsearch.types.dsl.ElasticsearchIndexFieldTypeFactory;
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import org.hibernate.search.backend.elasticsearch.types.dsl.provider.impl.ElasticsearchIndexFieldTypeFactoryProvider;
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import org.hibernate.search.backend.elasticsearch.types.impl.ElasticsearchIndexCompositeNodeType;
@@ -86,8 +86,7 @@ public ElasticsearchIndexRootBuilder(ElasticsearchIndexFieldTypeFactoryProvider
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this.customIndexMapping = customIndexMapping;
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this.defaultDynamicType = DynamicType.create( dynamicMapping );
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this.typeBuilder.queryElementFactory( AggregationTypeKeys.COUNT_DOCUMENTS,
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ElasticsearchCountDocumentAggregation.factory( false ) );
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this.typeBuilder.queryElementFactory( AggregationTypeKeys.COUNT, ElasticsearchCountAggregation.factory() );
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this.addDefaultImplicitFields();
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}
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‎backend/elasticsearch/src/main/java/org/hibernate/search/backend/elasticsearch/search/aggregation/impl/ElasticsearchCountAggregation.java

Lines changed: 218 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,218 @@
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/*
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* SPDX-License-Identifier: Apache-2.0
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* Copyright Red Hat Inc. and Hibernate Authors
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*/
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package org.hibernate.search.backend.elasticsearch.search.aggregation.impl;
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import java.util.List;
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import org.hibernate.search.backend.elasticsearch.gson.impl.JsonAccessor;
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import org.hibernate.search.backend.elasticsearch.gson.impl.JsonElementTypes;
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import org.hibernate.search.backend.elasticsearch.logging.impl.ElasticsearchClientLog;
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import org.hibernate.search.backend.elasticsearch.logging.impl.QueryLog;
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import org.hibernate.search.backend.elasticsearch.search.common.impl.ElasticsearchSearchIndexNodeContext;
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import org.hibernate.search.backend.elasticsearch.search.common.impl.ElasticsearchSearchIndexScope;
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import org.hibernate.search.backend.elasticsearch.search.common.impl.ElasticsearchSearchIndexValueFieldContext;
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import org.hibernate.search.backend.elasticsearch.search.predicate.impl.ElasticsearchSearchPredicate;
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import org.hibernate.search.backend.elasticsearch.search.query.impl.ElasticsearchSearchQueryExtractContext;
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import org.hibernate.search.engine.search.aggregation.AggregationKey;
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import org.hibernate.search.engine.search.aggregation.spi.CountAggregationBuilder;
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import org.hibernate.search.engine.search.aggregation.spi.CountDocumentAggregationBuilder;
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import org.hibernate.search.engine.search.aggregation.spi.CountValuesAggregationBuilder;
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import org.hibernate.search.engine.search.common.spi.SearchQueryElementFactory;
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import com.google.gson.JsonElement;
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import com.google.gson.JsonObject;
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public abstract class ElasticsearchCountAggregation {
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private ElasticsearchCountAggregation() {
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}
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public static SearchQueryElementFactory<CountAggregationBuilder.TypeSelector,
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ElasticsearchSearchIndexScope<?>,
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ElasticsearchSearchIndexNodeContext> factory() {
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return new Factory();
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}
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private static class Factory
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implements SearchQueryElementFactory<CountAggregationBuilder.TypeSelector,
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ElasticsearchSearchIndexScope<?>,
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ElasticsearchSearchIndexNodeContext> {
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@Override
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public CountAggregationBuilder.TypeSelector create(ElasticsearchSearchIndexScope<?> scope,
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ElasticsearchSearchIndexNodeContext node) {
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return new ElasticsearchCountAggregation.TypeSelector( scope, node );
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}
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@Override
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public void checkCompatibleWith(SearchQueryElementFactory<?, ?, ?> other) {
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if ( !getClass().equals( other.getClass() ) ) {
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throw QueryLog.INSTANCE.differentImplementationClassForQueryElement( getClass(), other.getClass() );
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}
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}
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}
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private static final class TypeSelector implements CountAggregationBuilder.TypeSelector {
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private final ElasticsearchSearchIndexScope<?> scope;
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private final ElasticsearchSearchIndexNodeContext node;
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private TypeSelector(ElasticsearchSearchIndexScope<?> scope,
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ElasticsearchSearchIndexNodeContext node) {
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this.scope = scope;
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this.node = node; // doesn't matter in this case
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}
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@Override
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public CountValuesAggregationBuilder values() {
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return new ElasticsearchCountValuesAggregation.Builder( scope, node.toValueField() );
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}
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@Override
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public CountDocumentAggregationBuilder documents() {
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boolean isNested = node.isValueField() && !node.toValueField().nestedPathHierarchy().isEmpty();
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return new ElasticsearchCountDocumentAggregation.Builder( scope, isNested );
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}
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}
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private static class ElasticsearchCountDocumentAggregation extends AbstractElasticsearchAggregation<Long> {
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private static final JsonAccessor<Long> TOTAL_HITS_VALUE_PROPERTY_ACCESSOR =
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JsonAccessor.root().property( "hits" )
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.property( "total" )
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.property( "value" ).asLong();
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private static final JsonAccessor<Long> RESPONSE_DOC_COUNT_ACCESSOR =
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JsonAccessor.root().property( "doc_count" ).asLong();
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private static final JsonAccessor<Long> RESPONSE_ROOT_DOC_COUNT_ACCESSOR =
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JsonAccessor.root().property( "root_doc_count" ).property( "doc_count" ).asLong();
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private final boolean isNested;
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private ElasticsearchCountDocumentAggregation(Builder builder) {
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super( builder );
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this.isNested = builder.isNested;
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}
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@Override
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public Extractor<Long> request(AggregationRequestContext context, AggregationKey<?> key, JsonObject jsonAggregations) {
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return new CountDocumentsExtractor( key, isNested, context.isRootContext() );
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}
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private record CountDocumentsExtractor(AggregationKey<?> key, boolean isNested, boolean rootContext)
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implements Extractor<Long> {
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@Override
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public Long extract(JsonObject aggregationResult, AggregationExtractContext context) {
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if ( rootContext ) {
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if ( context instanceof ElasticsearchSearchQueryExtractContext c ) {
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return TOTAL_HITS_VALUE_PROPERTY_ACCESSOR.get( c.getResponseBody() )
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.orElseThrow( ElasticsearchClientLog.INSTANCE::elasticsearchResponseMissingData );
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}
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}
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else {
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if ( isNested ) {
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// We must return the number of root documents,
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// not the number of leaf documents that Elasticsearch returns by default.
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return RESPONSE_ROOT_DOC_COUNT_ACCESSOR.get( aggregationResult )
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.orElseThrow( ElasticsearchClientLog.INSTANCE::elasticsearchResponseMissingData );
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}
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else {
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return RESPONSE_DOC_COUNT_ACCESSOR.get( aggregationResult )
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.orElseThrow( ElasticsearchClientLog.INSTANCE::elasticsearchResponseMissingData );
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}
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}
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throw ElasticsearchClientLog.INSTANCE.elasticsearchResponseMissingData();
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}
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}
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private static class Builder extends AbstractBuilder<Long>
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implements CountDocumentAggregationBuilder {
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private final boolean isNested;
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private Builder(ElasticsearchSearchIndexScope<?> scope, boolean isNested) {
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super( scope );
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this.isNested = isNested;
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}
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@Override
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public ElasticsearchCountDocumentAggregation build() {
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return new ElasticsearchCountDocumentAggregation( this );
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}
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}
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}
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private static class ElasticsearchCountValuesAggregation extends AbstractElasticsearchNestableAggregation<Long> {
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private static final JsonAccessor<JsonObject> COUNT_PROPERTY_ACCESSOR =
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JsonAccessor.root().property( "value_count" ).asObject();
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private static final JsonAccessor<JsonObject> COUNT_DISTINCT_PROPERTY_ACCESSOR =
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JsonAccessor.root().property( "cardinality" ).asObject();
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private static final JsonAccessor<String> FIELD_PROPERTY_ACCESSOR =
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JsonAccessor.root().property( "field" ).asString();
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private final String absoluteFieldPath;
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private final JsonAccessor<JsonObject> operation;
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private ElasticsearchCountValuesAggregation(Builder builder) {
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super( builder );
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this.absoluteFieldPath = builder.field.absolutePath();
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this.operation = builder.operation;
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}
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@Override
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protected final JsonObject doRequest(AggregationRequestBuildingContextContext context) {
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JsonObject outerObject = new JsonObject();
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JsonObject innerObject = new JsonObject();
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operation.set( outerObject, innerObject );
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FIELD_PROPERTY_ACCESSOR.set( innerObject, absoluteFieldPath );
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return outerObject;
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}
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@Override
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protected Extractor<Long> extractor(AggregationKey<?> key, AggregationRequestBuildingContextContext context) {
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return new MetricLongExtractor( key, nestedPathHierarchy, filter );
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}
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private static class MetricLongExtractor extends AbstractExtractor<Long> {
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protected MetricLongExtractor(AggregationKey<?> key, List<String> nestedPathHierarchy,
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ElasticsearchSearchPredicate filter) {
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super( key, nestedPathHierarchy, filter );
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}
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@Override
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protected Long doExtract(JsonObject aggregationResult, AggregationExtractContext context) {
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JsonElement value = aggregationResult.get( "value" );
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return JsonElementTypes.LONG.fromElement( value );
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}
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}
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private static class Builder extends AbstractElasticsearchNestableAggregation.AbstractBuilder<Long>
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implements CountValuesAggregationBuilder {
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private JsonAccessor<JsonObject> operation;
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private Builder(ElasticsearchSearchIndexScope<?> scope, ElasticsearchSearchIndexValueFieldContext<?> field) {
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super( scope, field );
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this.operation = COUNT_PROPERTY_ACCESSOR;
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}
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@Override
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public ElasticsearchCountValuesAggregation build() {
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return new ElasticsearchCountValuesAggregation( this );
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}
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@Override
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public void distinct(boolean distinct) {
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if ( distinct ) {
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operation = COUNT_DISTINCT_PROPERTY_ACCESSOR;
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}
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else {
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operation = COUNT_PROPERTY_ACCESSOR;
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}
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}
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}
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}
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}

‎backend/elasticsearch/src/main/java/org/hibernate/search/backend/elasticsearch/search/aggregation/impl/ElasticsearchCountDocumentAggregation.java

Lines changed: 0 additions & 124 deletions
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