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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.search.aggregations.bucket.significant;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.SortedNumericDocValuesField;
import org.apache.lucene.document.StoredField;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.index.RandomIndexWriter;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.store.Directory;
import org.apache.lucene.util.BytesRef;
import org.elasticsearch.index.analysis.AnalyzerScope;
import org.elasticsearch.index.analysis.NamedAnalyzer;
import org.elasticsearch.index.mapper.MappedFieldType;
import org.elasticsearch.index.mapper.NumberFieldMapper;
import org.elasticsearch.index.mapper.SourceFieldMapper;
import org.elasticsearch.index.mapper.TextFieldMapper.TextFieldType;
import org.elasticsearch.index.query.QueryShardContext;
import org.elasticsearch.index.query.QueryShardException;
import org.elasticsearch.search.aggregations.AggregatorTestCase;
import org.elasticsearch.search.aggregations.bucket.sampler.Sampler;
import org.elasticsearch.search.aggregations.bucket.sampler.SamplerAggregationBuilder;
import org.elasticsearch.search.aggregations.bucket.significant.SignificantTerms;
import org.elasticsearch.search.aggregations.bucket.significant.SignificantTerms.Bucket;
import org.elasticsearch.search.aggregations.bucket.significant.SignificantTextAggregationBuilder;
import java.io.IOException;
import java.util.Arrays;
public class SignificantTextAggregatorTests extends AggregatorTestCase {
/**
* Uses the significant text aggregation to find the keywords in text fields
*/
public void testSignificance() throws IOException {
TextFieldType textFieldType = new TextFieldType();
textFieldType.setName("text");
textFieldType.setIndexAnalyzer(new NamedAnalyzer("my_analyzer", AnalyzerScope.GLOBAL, new StandardAnalyzer()));
IndexWriterConfig indexWriterConfig = newIndexWriterConfig();
try (Directory dir = newDirectory(); IndexWriter w = new IndexWriter(dir, indexWriterConfig)) {
for (int i = 0; i < 10; i++) {
Document doc = new Document();
StringBuilder text = new StringBuilder("common ");
if (i % 2 == 0) {
text.append("odd ");
} else {
text.append("even separator" + i + " duplicate duplicate duplicate duplicate duplicate duplicate ");
}
doc.add(new Field("text", text.toString(), textFieldType));
String json ="{ \"text\" : \"" + text.toString() + "\","+
" \"json_only_field\" : \"" + text.toString() + "\"" +
" }";
doc.add(new StoredField("_source", new BytesRef(json)));
w.addDocument(doc);
}
SignificantTextAggregationBuilder sigAgg = new SignificantTextAggregationBuilder("sig_text", "text").filterDuplicateText(true);
if(randomBoolean()){
sigAgg.sourceFieldNames(Arrays.asList(new String [] {"json_only_field"}));
}
SamplerAggregationBuilder aggBuilder = new SamplerAggregationBuilder("sampler")
.subAggregation(sigAgg);
try (IndexReader reader = DirectoryReader.open(w)) {
IndexSearcher searcher = new IndexSearcher(reader);
// Search "odd" which should have no duplication
Sampler sampler = searchAndReduce(searcher, new TermQuery(new Term("text", "odd")), aggBuilder, textFieldType);
SignificantTerms terms = sampler.getAggregations().get("sig_text");
assertNull(terms.getBucketByKey("even"));
assertNull(terms.getBucketByKey("duplicate"));
assertNull(terms.getBucketByKey("common"));
assertNotNull(terms.getBucketByKey("odd"));
// Search "even" which will have duplication
sampler = searchAndReduce(searcher, new TermQuery(new Term("text", "even")), aggBuilder, textFieldType);
terms = sampler.getAggregations().get("sig_text");
assertNull(terms.getBucketByKey("odd"));
assertNull(terms.getBucketByKey("duplicate"));
assertNull(terms.getBucketByKey("common"));
assertNull(terms.getBucketByKey("separator2"));
assertNull(terms.getBucketByKey("separator4"));
assertNull(terms.getBucketByKey("separator6"));
assertNotNull(terms.getBucketByKey("even"));
}
}
}
/**
* Test documents with arrays of text
*/
public void testSignificanceOnTextArrays() throws IOException {
TextFieldType textFieldType = new TextFieldType();
textFieldType.setName("text");
textFieldType.setIndexAnalyzer(new NamedAnalyzer("my_analyzer", AnalyzerScope.GLOBAL, new StandardAnalyzer()));
IndexWriterConfig indexWriterConfig = newIndexWriterConfig();
try (Directory dir = newDirectory(); IndexWriter w = new IndexWriter(dir, indexWriterConfig)) {
for (int i = 0; i < 10; i++) {
Document doc = new Document();
doc.add(new Field("text", "foo", textFieldType));
String json ="{ \"text\" : [\"foo\",\"foo\"], \"title\" : [\"foo\", \"foo\"]}";
doc.add(new StoredField("_source", new BytesRef(json)));
w.addDocument(doc);
}
SignificantTextAggregationBuilder sigAgg = new SignificantTextAggregationBuilder("sig_text", "text");
sigAgg.sourceFieldNames(Arrays.asList(new String [] {"title", "text"}));
try (IndexReader reader = DirectoryReader.open(w)) {
IndexSearcher searcher = new IndexSearcher(reader);
searchAndReduce(searcher, new TermQuery(new Term("text", "foo")), sigAgg, textFieldType);
// No significant results to be found in this test - only checking we don't end up
// with the internal exception discovered in issue https://github.com/elastic/elasticsearch/issues/25029
}
}
}
}
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