shaie commented on code in PR #841: URL: https://github.com/apache/lucene/pull/841#discussion_r903277452
########## lucene/demo/src/java/org/apache/lucene/demo/facet/CustomFacetSetExample.java: ########## @@ -0,0 +1,303 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF 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. + */ +package org.apache.lucene.demo.facet; + +import java.io.IOException; +import java.time.LocalDate; +import java.time.ZoneOffset; +import java.util.Collections; +import java.util.List; +import org.apache.lucene.analysis.core.WhitespaceAnalyzer; +import org.apache.lucene.document.*; +import org.apache.lucene.facet.FacetResult; +import org.apache.lucene.facet.Facets; +import org.apache.lucene.facet.FacetsCollector; +import org.apache.lucene.facet.FacetsCollectorManager; +import org.apache.lucene.facet.facetset.*; +import org.apache.lucene.index.DirectoryReader; +import org.apache.lucene.index.IndexWriter; +import org.apache.lucene.index.IndexWriterConfig; +import org.apache.lucene.index.IndexWriterConfig.OpenMode; +import org.apache.lucene.search.IndexSearcher; +import org.apache.lucene.search.MatchAllDocsQuery; +import org.apache.lucene.store.ByteBuffersDirectory; +import org.apache.lucene.store.Directory; +import org.apache.lucene.util.BytesRef; +import org.apache.lucene.util.NumericUtils; + +/** + * Shows usage of indexing and searching {@link FacetSetsField} with a custom {@link FacetSet} + * implementation. Unlike the out of the box {@link FacetSet} implementations, this example shows + * how to mix and match dimensions of different types, as well as implementing a custom {@link + * FacetSetMatcher}. + */ +public class CustomFacetSetExample { + + private static final long MAY_SECOND_2022 = date("2022-05-02"); + private static final long JUNE_SECOND_2022 = date("2022-06-02"); + private static final long JULY_SECOND_2022 = date("2022-07-02"); + private static final float HUNDRED_TWENTY_DEGREES = fahrenheitToCelsius(120); + private static final float HUNDRED_DEGREES = fahrenheitToCelsius(100); + private static final float EIGHTY_DEGREES = fahrenheitToCelsius(80); + + private final Directory indexDir = new ByteBuffersDirectory(); + + /** Empty constructor */ + public CustomFacetSetExample() {} + + /** Build the example index. */ + private void index() throws IOException { + IndexWriter indexWriter = + new IndexWriter( + indexDir, new IndexWriterConfig(new WhitespaceAnalyzer()).setOpenMode(OpenMode.CREATE)); + + // Every document holds the temperature measures for a City by Date + + Document doc = new Document(); + doc.add(new StringField("city", "city1", Field.Store.YES)); + doc.add( + FacetSetsField.create( + "temperature", + new TemperatureReadingFacetSet(MAY_SECOND_2022, HUNDRED_DEGREES), + new TemperatureReadingFacetSet(JUNE_SECOND_2022, EIGHTY_DEGREES), + new TemperatureReadingFacetSet(JULY_SECOND_2022, HUNDRED_TWENTY_DEGREES))); + indexWriter.addDocument(doc); + + doc = new Document(); + doc.add(new StringField("city", "city2", Field.Store.YES)); + doc.add( + FacetSetsField.create( + "temperature", + new TemperatureReadingFacetSet(MAY_SECOND_2022, EIGHTY_DEGREES), + new TemperatureReadingFacetSet(JUNE_SECOND_2022, HUNDRED_DEGREES), + new TemperatureReadingFacetSet(JULY_SECOND_2022, HUNDRED_TWENTY_DEGREES))); + indexWriter.addDocument(doc); + + indexWriter.close(); + } + + /** Counting documents which exactly match a given {@link FacetSet}. */ + private List<FacetResult> exactMatching() throws IOException { + DirectoryReader indexReader = DirectoryReader.open(indexDir); + IndexSearcher searcher = new IndexSearcher(indexReader); + + // MatchAllDocsQuery is for "browsing" (counts facets + // for all non-deleted docs in the index); normally + // you'd use a "normal" query: + FacetsCollector fc = searcher.search(new MatchAllDocsQuery(), new FacetsCollectorManager()); + + // Count both "Publish Date" and "Author" dimensions Review Comment: Indeed :), I copied the simple faceting example and didn't cover up my tracks very well :D. -- This is an automated message from the Apache Git Service. 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