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package org.apache.solr.search.grouping.endresulttransformer;
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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import org.apache.lucene.search.ScoreDoc;
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import org.apache.solr.common.SolrDocument;
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import org.apache.solr.response.SolrQueryResponse;
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import org.apache.solr.search.grouping.GroupingSpecification;
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* Responsible for transforming the grouped result into the final format for displaying purposes.
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* @lucene.experimental
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public interface EndResultTransformer {
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* Transforms the specified result into its final form and puts it into the specified response.
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* @param result The map containing the grouping result (for grouping by field and query)
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* @param response The response that will be rendered to the client
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* @param groupingSpecification The grouping specification
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* @param solrDocumentSource The source of {@link SolrDocument} instances
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void transform(Map<String, ?> result, SolrQueryResponse response, GroupingSpecification groupingSpecification, SolrDocumentSource solrDocumentSource);
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* Abstracts the source for {@link SolrDocument} instances.
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* The source of documents is different for a distributed search than local search
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public interface SolrDocumentSource {
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SolrDocument retrieve(ScoreDoc doc);