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Posted to commits@lucene.apache.org by mi...@apache.org on 2020/09/28 17:03:55 UTC
[lucene-solr] 01/02: LUCENE-9444: add utility class to retrieve
facet labels from the taxonomy index for a facet field (#1893)
This is an automated email from the ASF dual-hosted git repository.
mikemccand pushed a commit to branch branch_8x
in repository https://gitbox.apache.org/repos/asf/lucene-solr.git
commit d71923065dba0b6fe275cb60bd5cffb017509827
Author: goankur <47...@users.noreply.github.com>
AuthorDate: Mon Sep 28 07:55:37 2020 -0700
LUCENE-9444: add utility class to retrieve facet labels from the taxonomy index for a facet field (#1893)
LUCENE-9444: add utility class to retrieve facet labels from the taxonomy index for a facet field so such fields do not also have to be redundantly stored in the index.
Co-authored-by: Ankur Goel <go...@amazon.com>
---
.../lucene/facet/taxonomy/TaxonomyFacetLabels.java | 195 +++++++++++++++++++++
.../org/apache/lucene/facet/FacetTestCase.java | 42 ++++-
.../facet/taxonomy/TestTaxonomyFacetCounts.java | 44 ++++-
.../facet/taxonomy/TestTaxonomyFacetLabels.java | 194 ++++++++++++++++++++
4 files changed, 472 insertions(+), 3 deletions(-)
diff --git a/lucene/facet/src/java/org/apache/lucene/facet/taxonomy/TaxonomyFacetLabels.java b/lucene/facet/src/java/org/apache/lucene/facet/taxonomy/TaxonomyFacetLabels.java
new file mode 100644
index 0000000..d368e74
--- /dev/null
+++ b/lucene/facet/src/java/org/apache/lucene/facet/taxonomy/TaxonomyFacetLabels.java
@@ -0,0 +1,195 @@
+/*
+ * 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.facet.taxonomy;
+
+import org.apache.lucene.index.LeafReaderContext;
+import org.apache.lucene.util.IntsRef;
+
+import java.io.IOException;
+
+import static org.apache.lucene.facet.taxonomy.TaxonomyReader.INVALID_ORDINAL;
+import static org.apache.lucene.facet.taxonomy.TaxonomyReader.ROOT_ORDINAL;
+
+/**
+ * Utility class to easily retrieve previously indexed facet labels, allowing you to skip also adding stored fields for these values,
+ * reducing your index size.
+ *
+ * @lucene.experimental
+ **/
+public class TaxonomyFacetLabels {
+
+ /**
+ * Index field name provided to the constructor
+ */
+ private final String indexFieldName;
+
+ /**
+ * {@code TaxonomyReader} provided to the constructor
+ */
+ private final TaxonomyReader taxoReader;
+
+
+ /**
+ * {@code OrdinalsReader} to decode ordinals previously indexed into the {@code BinaryDocValues} facet field
+ */
+ private final OrdinalsReader ordsReader;
+
+ /**
+ * Sole constructor. Do not close the provided {@link TaxonomyReader} while still using this instance!
+ */
+ public TaxonomyFacetLabels(TaxonomyReader taxoReader, String indexFieldName) throws IOException {
+ this.taxoReader = taxoReader;
+ this.indexFieldName = indexFieldName;
+ this.ordsReader = new DocValuesOrdinalsReader(indexFieldName);
+ }
+
+ /**
+ * Create and return an instance of {@link FacetLabelReader} to retrieve facet labels for
+ * multiple documents and (optionally) for a specific dimension. You must create this per-segment,
+ * and then step through all hits, in order, for that segment.
+ *
+ * <p><b>NOTE</b>: This class is not thread-safe, so you must use a new instance of this
+ * class for each thread.</p>
+ *
+ * @param readerContext LeafReaderContext used to access the {@code BinaryDocValues} facet field
+ * @return an instance of {@link FacetLabelReader}
+ * @throws IOException when a low-level IO issue occurs
+ */
+ public FacetLabelReader getFacetLabelReader(LeafReaderContext readerContext) throws IOException {
+ return new FacetLabelReader(ordsReader, readerContext);
+ }
+
+ /**
+ * Utility class to retrieve facet labels for multiple documents.
+ *
+ * @lucene.experimental
+ */
+ public class FacetLabelReader {
+ private final OrdinalsReader.OrdinalsSegmentReader ordinalsSegmentReader;
+ private final IntsRef decodedOrds = new IntsRef();
+ private int currentDocId = -1;
+ private int currentPos = -1;
+
+ // Lazily set when nextFacetLabel(int docId, String facetDimension) is first called
+ private int[] parents;
+
+ /**
+ * Sole constructor.
+ */
+ public FacetLabelReader(OrdinalsReader ordsReader, LeafReaderContext readerContext) throws IOException {
+ ordinalsSegmentReader = ordsReader.getReader(readerContext);
+ }
+
+ /**
+ * Retrieves the next {@link FacetLabel} for the specified {@code docId}, or {@code null} if there are no more.
+ * This method has state: if the provided {@code docId} is the same as the previous invocation, it returns the
+ * next {@link FacetLabel} for that document. Otherwise, it advances to the new {@code docId} and provides the
+ * first {@link FacetLabel} for that document, or {@code null} if that document has no indexed facets. Each
+ * new {@code docId} must be in strictly monotonic (increasing) order.
+ *
+ * <p><b>NOTE</b>: The returned FacetLabels may not be in the same order in which they were indexed</p>
+ *
+ * @param docId input docId provided in monotonic (non-decreasing) order
+ * @return the first or next {@link FacetLabel}, or {@code null} if there are no more
+ * @throws IOException when a low-level IO issue occurs
+ * @throws IllegalArgumentException if docId provided is less than docId supplied in an earlier invocation
+ */
+ public FacetLabel nextFacetLabel(int docId) throws IOException {
+ if (currentDocId != docId) {
+ if (docId < currentDocId) {
+ throw new IllegalArgumentException("docs out of order: previous docId=" + currentDocId
+ + " current docId=" + docId);
+ }
+ ordinalsSegmentReader.get(docId, decodedOrds);
+ currentDocId = docId;
+ currentPos = decodedOrds.offset;
+ }
+
+ int endPos = decodedOrds.offset + decodedOrds.length;
+ assert currentPos <= endPos;
+
+ if (currentPos == endPos) {
+ // no more FacetLabels
+ return null;
+ }
+
+ int ord = decodedOrds.ints[currentPos++];
+ return taxoReader.getPath(ord);
+ }
+
+ private boolean isDescendant(int ord, int ancestorOrd) {
+ while (ord != INVALID_ORDINAL && ord != ROOT_ORDINAL) {
+ if (parents[ord] == ancestorOrd) {
+ return true;
+ }
+ ord = parents[ord];
+ }
+ return false;
+ }
+
+ /**
+ * Retrieves the next {@link FacetLabel} for the specified {@code docId} under the requested {@code facetDimension},
+ * or {@code null} if there are no more. This method has state: if the provided {@code docId} is the same as the
+ * previous invocation, it returns the next {@link FacetLabel} for that document. Otherwise, it advances to
+ * the new {@code docId} and provides the first {@link FacetLabel} for that document, or {@code null} if that document
+ * has no indexed facets. Each new {@code docId} must be in strictly monotonic (increasing) order.
+ *
+ * <p><b>NOTE</b>: This method loads the {@code int[] parents} array from the taxonomy index.
+ * The returned FacetLabels may not be in the same order in which they were indexed.</p>
+ *
+ * @param docId input docId provided in non-decreasing order
+ * @return the first or next {@link FacetLabel}, or {@code null} if there are no more
+ * @throws IOException if {@link TaxonomyReader} has problems getting path for an ordinal
+ * @throws IllegalArgumentException if docId provided is less than docId supplied in an earlier invocation
+ * @throws IllegalArgumentException if facetDimension is null
+ */
+ public FacetLabel nextFacetLabel(int docId, String facetDimension) throws IOException {
+ if (facetDimension == null) {
+ throw new IllegalArgumentException("Input facet dimension cannot be null");
+ }
+ final int parentOrd = taxoReader.getOrdinal(new FacetLabel(facetDimension));
+ if (parentOrd == INVALID_ORDINAL) {
+ throw new IllegalArgumentException("Category ordinal not found for facet dimension: " + facetDimension);
+ }
+
+ if (currentDocId != docId) {
+ if (docId < currentDocId) {
+ throw new IllegalArgumentException("docs out of order: previous docId=" + currentDocId
+ + " current docId=" + docId);
+ }
+ ordinalsSegmentReader.get(docId, decodedOrds);
+ currentPos = decodedOrds.offset;
+ currentDocId = docId;
+ }
+
+ if (parents == null) {
+ parents = taxoReader.getParallelTaxonomyArrays().parents();
+ }
+
+ int endPos = decodedOrds.offset + decodedOrds.length;
+ assert currentPos <= endPos;
+
+ for (; currentPos < endPos; ) {
+ int ord = decodedOrds.ints[currentPos++];
+ if (isDescendant(ord, parentOrd) == true) {
+ return taxoReader.getPath(ord);
+ }
+ }
+ return null;
+ }
+ }
+}
diff --git a/lucene/facet/src/test/org/apache/lucene/facet/FacetTestCase.java b/lucene/facet/src/test/org/apache/lucene/facet/FacetTestCase.java
index a88a080..6a7b9ec 100644
--- a/lucene/facet/src/test/org/apache/lucene/facet/FacetTestCase.java
+++ b/lucene/facet/src/test/org/apache/lucene/facet/FacetTestCase.java
@@ -25,18 +25,23 @@ import java.util.HashMap;
import java.util.List;
import java.util.Map;
+import org.apache.lucene.facet.FacetsCollector.MatchingDocs;
import org.apache.lucene.facet.taxonomy.CachedOrdinalsReader;
import org.apache.lucene.facet.taxonomy.DocValuesOrdinalsReader;
+import org.apache.lucene.facet.taxonomy.FacetLabel;
import org.apache.lucene.facet.taxonomy.FastTaxonomyFacetCounts;
import org.apache.lucene.facet.taxonomy.OrdinalsReader;
import org.apache.lucene.facet.taxonomy.TaxonomyFacetCounts;
+import org.apache.lucene.facet.taxonomy.TaxonomyFacetLabels;
+import org.apache.lucene.facet.taxonomy.TaxonomyFacetLabels.FacetLabelReader;
import org.apache.lucene.facet.taxonomy.TaxonomyReader;
+import org.apache.lucene.search.DocIdSetIterator;
import org.apache.lucene.util.BytesRef;
import org.apache.lucene.util.LuceneTestCase;
import org.apache.lucene.util.TestUtil;
public abstract class FacetTestCase extends LuceneTestCase {
-
+
public Facets getTaxonomyFacetCounts(TaxonomyReader taxoReader, FacetsConfig config, FacetsCollector c) throws IOException {
return getTaxonomyFacetCounts(taxoReader, config, c, FacetsConfig.DEFAULT_INDEX_FIELD_NAME);
}
@@ -56,6 +61,41 @@ public abstract class FacetTestCase extends LuceneTestCase {
return facets;
}
+ /**
+ * Utility method that uses {@link FacetLabelReader} to get facet labels
+ * for each hit in {@link MatchingDocs}. The method returns {@code List<List<FacetLabel>>}
+ * where outer list has one entry per document and inner list has all {@link FacetLabel}
+ * entries that belong to a document. The inner list may be empty if no {@link FacetLabel}
+ * are found for a hit.
+ *
+ * @param taxoReader {@link TaxonomyReader} used to read taxonomy during search. This instance is expected to be open for reading.
+ * @param fc {@link FacetsCollector} A collector with matching hits.
+ * @return {@code List<List<FacetLabel>} where outer list has one non-null entry per document
+ * and inner list contain all {@link FacetLabel} entries that belong to a document.
+ * @throws IOException when a low-level IO issue occurs.
+ */
+ public List<List<FacetLabel>> getAllTaxonomyFacetLabels(TaxonomyReader taxoReader, FacetsCollector fc) throws IOException {
+ List<List<FacetLabel>> actualLabels = new ArrayList<>();
+ TaxonomyFacetLabels taxoLabels = new TaxonomyFacetLabels(taxoReader, FacetsConfig.DEFAULT_INDEX_FIELD_NAME);
+
+ for (MatchingDocs m : fc.getMatchingDocs()) {
+ FacetLabelReader facetLabelReader = taxoLabels.getFacetLabelReader(m.context);
+
+ DocIdSetIterator disi = m.bits.iterator();
+ while (disi.nextDoc() != DocIdSetIterator.NO_MORE_DOCS) {
+ List<FacetLabel> facetLabels = new ArrayList<>();
+ int docId = disi.docID();
+ FacetLabel facetLabel = facetLabelReader.nextFacetLabel(docId);
+ while (facetLabel != null) {
+ facetLabels.add(facetLabel);
+ facetLabel = facetLabelReader.nextFacetLabel(docId);
+ }
+ actualLabels.add(facetLabels);
+ }
+ }
+ return actualLabels;
+ }
+
protected String[] getRandomTokens(int count) {
String[] tokens = new String[count];
for(int i=0;i<tokens.length;i++) {
diff --git a/lucene/facet/src/test/org/apache/lucene/facet/taxonomy/TestTaxonomyFacetCounts.java b/lucene/facet/src/test/org/apache/lucene/facet/taxonomy/TestTaxonomyFacetCounts.java
index cd18ca3..deb8208 100644
--- a/lucene/facet/src/test/org/apache/lucene/facet/taxonomy/TestTaxonomyFacetCounts.java
+++ b/lucene/facet/src/test/org/apache/lucene/facet/taxonomy/TestTaxonomyFacetCounts.java
@@ -20,6 +20,7 @@ import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.util.ArrayList;
+import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
@@ -678,13 +679,16 @@ public class TestTaxonomyFacetCounts extends FacetTestCase {
// Slow, yet hopefully bug-free, faceting:
@SuppressWarnings({"rawtypes","unchecked"}) Map<String,Integer>[] expectedCounts = new HashMap[numDims];
+ List<List<FacetLabel>> expectedLabels = new ArrayList<>();
+
for(int i=0;i<numDims;i++) {
expectedCounts[i] = new HashMap<>();
}
- for(TestDoc doc : testDocs) {
+ for (TestDoc doc : testDocs) {
if (doc.content.equals(searchToken)) {
- for(int j=0;j<numDims;j++) {
+ List<FacetLabel> facetLabels = new ArrayList<>();
+ for (int j = 0; j < numDims; j++) {
if (doc.dims[j] != null) {
Integer v = expectedCounts[j].get(doc.dims[j]);
if (v == null) {
@@ -692,8 +696,12 @@ public class TestTaxonomyFacetCounts extends FacetTestCase {
} else {
expectedCounts[j].put(doc.dims[j], v.intValue() + 1);
}
+
+ // Add document facet labels
+ facetLabels.add(new FacetLabel("dim" + j, doc.dims[j]));
}
}
+ expectedLabels.add(facetLabels);
}
}
@@ -711,6 +719,11 @@ public class TestTaxonomyFacetCounts extends FacetTestCase {
}
}
+ // Test facet labels for each matching test doc
+ List<List<FacetLabel>> actualLabels = getAllTaxonomyFacetLabels(tr, fc);
+ assertEquals(expectedLabels.size(), actualLabels.size());
+ assertTrue(sortedFacetLabels(expectedLabels).equals(sortedFacetLabels(actualLabels)));
+
// Sort by highest value, tie break by value:
sortFacetResults(expected);
@@ -726,6 +739,33 @@ public class TestTaxonomyFacetCounts extends FacetTestCase {
IOUtils.close(tw, searcher.getIndexReader(), tr, indexDir, taxoDir);
}
+ private static List<List<FacetLabel>> sortedFacetLabels(List<List<FacetLabel>> allFacetLabels) {
+ // sort each inner list since there is no guaranteed order in which FacetLabels
+ // are expected to be retrieved for each document
+ for (List<FacetLabel> facetLabels : allFacetLabels) {
+ Collections.sort(facetLabels);
+ }
+
+ Collections.sort(allFacetLabels, (o1, o2) -> {
+ int diff = o1.size() - o2.size();
+ if (diff != 0) {
+ return diff;
+ }
+
+ // the lists are equal in size and sorted
+ for (int i = 0; i < o1.size(); i++) {
+ int comp = o1.get(i).compareTo(o2.get(i));
+ if (comp != 0) {
+ return comp;
+ }
+ }
+ // all elements are equal
+ return 0;
+ });
+
+ return allFacetLabels;
+ }
+
private static Facets getAllFacets(String indexFieldName, IndexSearcher searcher, TaxonomyReader taxoReader, FacetsConfig config) throws IOException {
if (random().nextBoolean()) {
// Aggregate the facet counts:
diff --git a/lucene/facet/src/test/org/apache/lucene/facet/taxonomy/TestTaxonomyFacetLabels.java b/lucene/facet/src/test/org/apache/lucene/facet/taxonomy/TestTaxonomyFacetLabels.java
new file mode 100644
index 0000000..3a271b2
--- /dev/null
+++ b/lucene/facet/src/test/org/apache/lucene/facet/taxonomy/TestTaxonomyFacetLabels.java
@@ -0,0 +1,194 @@
+/*
+ * 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.facet.taxonomy;
+
+import org.apache.lucene.document.Document;
+import org.apache.lucene.facet.FacetField;
+import org.apache.lucene.facet.FacetTestCase;
+import org.apache.lucene.facet.FacetsCollector;
+import org.apache.lucene.facet.FacetsCollector.MatchingDocs;
+import org.apache.lucene.facet.FacetsConfig;
+import org.apache.lucene.facet.taxonomy.directory.DirectoryTaxonomyReader;
+import org.apache.lucene.facet.taxonomy.directory.DirectoryTaxonomyWriter;
+import org.apache.lucene.index.IndexWriterConfig;
+import org.apache.lucene.index.RandomIndexWriter;
+import org.apache.lucene.search.DocIdSetIterator;
+import org.apache.lucene.search.IndexSearcher;
+import org.apache.lucene.search.MatchAllDocsQuery;
+import org.apache.lucene.store.Directory;
+import org.apache.lucene.util.IOUtils;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+public class TestTaxonomyFacetLabels extends FacetTestCase {
+
+ private List<Document> prepareDocuments() {
+ List<Document> docs = new ArrayList<>();
+
+ Document doc = new Document();
+ doc.add(new FacetField("Author", "Bob"));
+ doc.add(new FacetField("Publish Date", "2010", "10", "15"));
+ docs.add(doc);
+
+ doc = new Document();
+ doc.add(new FacetField("Author", "Lisa"));
+ doc.add(new FacetField("Publish Date", "2010", "10", "20"));
+ docs.add(doc);
+
+ doc = new Document();
+ doc.add(new FacetField("Author", "Tom"));
+ doc.add(new FacetField("Publish Date", "2012", "1", "1"));
+ docs.add(doc);
+
+ doc = new Document();
+ doc.add(new FacetField("Author", "Susan"));
+ doc.add(new FacetField("Publish Date", "2012", "1", "7"));
+ docs.add(doc);
+
+ doc = new Document();
+ doc.add(new FacetField("Author", "Frank"));
+ doc.add(new FacetField("Publish Date", "1999", "5", "5"));
+ docs.add(doc);
+
+ return docs;
+ }
+
+ private List<Integer> allDocIds(MatchingDocs m, boolean decreasingDocIds) throws IOException {
+ DocIdSetIterator disi = m.bits.iterator();
+ List<Integer> docIds = new ArrayList<>();
+ while (disi.nextDoc() != DocIdSetIterator.NO_MORE_DOCS) {
+ docIds.add(disi.docID());
+ }
+
+ if (decreasingDocIds == true) {
+ Collections.reverse(docIds);
+ }
+ return docIds;
+ }
+
+ private List<FacetLabel> lookupFacetLabels(TaxonomyFacetLabels taxoLabels,
+ List<MatchingDocs> matchingDocs) throws IOException {
+ return lookupFacetLabels(taxoLabels, matchingDocs, null, false);
+ }
+
+ private List<FacetLabel> lookupFacetLabels(TaxonomyFacetLabels taxoLabels,
+ List<MatchingDocs> matchingDocs,
+ String dimension) throws IOException {
+ return lookupFacetLabels(taxoLabels, matchingDocs, dimension, false);
+ }
+
+ private List<FacetLabel> lookupFacetLabels(TaxonomyFacetLabels taxoLabels, List<MatchingDocs> matchingDocs, String dimension,
+ boolean decreasingDocIds) throws IOException {
+ List<FacetLabel> facetLabels = new ArrayList<>();
+
+ for (MatchingDocs m : matchingDocs) {
+ TaxonomyFacetLabels.FacetLabelReader facetLabelReader = taxoLabels.getFacetLabelReader(m.context);
+ List<Integer> docIds = allDocIds(m, decreasingDocIds);
+ FacetLabel facetLabel;
+ for (Integer docId : docIds) {
+ while (true) {
+ if (dimension != null) {
+ facetLabel = facetLabelReader.nextFacetLabel(docId, dimension);
+ } else {
+ facetLabel = facetLabelReader.nextFacetLabel(docId);
+ }
+
+ if (facetLabel == null) {
+ break;
+ }
+ facetLabels.add(facetLabel);
+ }
+ }
+ }
+
+ return facetLabels;
+ }
+
+
+ public void testBasic() throws Exception {
+ Directory dir = newDirectory();
+ Directory taxoDir = newDirectory();
+
+ // Writes facet ords to a separate directory from the main index:
+ DirectoryTaxonomyWriter taxoWriter = new DirectoryTaxonomyWriter(taxoDir, IndexWriterConfig.OpenMode.CREATE);
+ RandomIndexWriter writer = new RandomIndexWriter(random(), dir);
+
+ FacetsConfig config = new FacetsConfig();
+ config.setHierarchical("Publish Date", true);
+
+ for (Document doc : prepareDocuments()) {
+ writer.addDocument(config.build(taxoWriter, doc));
+ }
+
+ // NRT open
+ IndexSearcher searcher = newSearcher(writer.getReader());
+ // NRT open
+ TaxonomyReader taxoReader = new DirectoryTaxonomyReader(taxoWriter);
+
+ FacetsCollector fc = new FacetsCollector();
+ searcher.search(new MatchAllDocsQuery(), fc);
+
+ TaxonomyFacetLabels taxoLabels = new TaxonomyFacetLabels(taxoReader, FacetsConfig.DEFAULT_INDEX_FIELD_NAME);
+
+ // Check labels for all dimensions
+ List<FacetLabel> facetLabels = lookupFacetLabels(taxoLabels, fc.getMatchingDocs());
+ assertEquals("Incorrect number of facet labels received", 10, facetLabels.size());
+
+ // Check labels for all dimensions
+ assertTrue(facetLabels.stream()
+ .filter(l -> "Author".equals(l.components[0]))
+ .map(l -> l.components[1]).collect(Collectors.toSet())
+ .equals(Set.of("Bob", "Lisa", "Susan", "Frank", "Tom")));
+
+ assertTrue(facetLabels.stream()
+ .filter(l -> "Publish Date".equals(l.components[0]))
+ .map(l -> String.join("/", l.components[1], l.components[2], l.components[3]))
+ .collect(Collectors.toSet())
+ .equals(Set.of("2010/10/15", "2010/10/20", "2012/1/1", "2012/1/7", "1999/5/5")));
+
+ // Check labels for a specific dimension
+ facetLabels = lookupFacetLabels(taxoLabels, fc.getMatchingDocs(), "Publish Date");
+ assertEquals("Incorrect number of facet labels received for 'Publish Date'", 5, facetLabels.size());
+
+ assertTrue(facetLabels.stream()
+ .map(l -> String.join("/", l.components[1], l.components[2], l.components[3]))
+ .collect(Collectors.toSet())
+ .equals(Set.of("2010/10/15", "2010/10/20", "2012/1/1", "2012/1/7", "1999/5/5")));
+
+ try {
+ facetLabels = lookupFacetLabels(taxoLabels, fc.getMatchingDocs(), null, true);
+ fail("IllegalArgumentException was not thrown for using docIds supplied in decreasing order");
+ } catch (IllegalArgumentException ae) {
+ assertTrue(ae.getMessage().contains("docs out of order"));
+ }
+
+ try {
+ facetLabels = lookupFacetLabels(taxoLabels, fc.getMatchingDocs(), "Publish Date", true);
+ fail("Assertion error was not thrown for using docIds supplied in decreasing order");
+ } catch (IllegalArgumentException ae) {
+ assertTrue(ae.getMessage().contains("docs out of order"));
+ }
+
+ writer.close();
+ IOUtils.close(taxoWriter, searcher.getIndexReader(), taxoReader, taxoDir, dir);
+ }
+}