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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.index.query;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.BoostQuery;
import org.apache.lucene.search.DisjunctionMaxQuery;
import org.apache.lucene.search.PrefixQuery;
import org.apache.lucene.search.Query;
import java.io.IOException;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import static org.hamcrest.CoreMatchers.nullValue;
import static org.hamcrest.Matchers.closeTo;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.instanceOf;
public class DisMaxQueryBuilderTests extends AbstractQueryTestCase<DisMaxQueryBuilder> {
/**
* @return a {@link DisMaxQueryBuilder} with random inner queries
*/
@Override
protected DisMaxQueryBuilder doCreateTestQueryBuilder() {
DisMaxQueryBuilder dismax = new DisMaxQueryBuilder();
int clauses = randomIntBetween(1, 5);
for (int i = 0; i < clauses; i++) {
dismax.add(RandomQueryBuilder.createQuery(random()));
}
if (randomBoolean()) {
dismax.tieBreaker(2.0f / randomIntBetween(1, 20));
}
return dismax;
}
@Override
protected void doAssertLuceneQuery(DisMaxQueryBuilder queryBuilder, Query query, QueryShardContext context) throws IOException {
Collection<Query> queries = AbstractQueryBuilder.toQueries(queryBuilder.innerQueries(), context);
if (queries.isEmpty()) {
assertThat(query, nullValue());
} else {
assertThat(query, instanceOf(DisjunctionMaxQuery.class));
DisjunctionMaxQuery disjunctionMaxQuery = (DisjunctionMaxQuery) query;
assertThat(disjunctionMaxQuery.getTieBreakerMultiplier(), equalTo(queryBuilder.tieBreaker()));
assertThat(disjunctionMaxQuery.getDisjuncts().size(), equalTo(queries.size()));
Iterator<Query> queryIterator = queries.iterator();
for (int i = 0; i < disjunctionMaxQuery.getDisjuncts().size(); i++) {
assertThat(disjunctionMaxQuery.getDisjuncts().get(i), equalTo(queryIterator.next()));
}
}
}
@Override
protected Map<String, DisMaxQueryBuilder> getAlternateVersions() {
Map<String, DisMaxQueryBuilder> alternateVersions = new HashMap<>();
QueryBuilder innerQuery = createTestQueryBuilder().innerQueries().get(0);
DisMaxQueryBuilder expectedQuery = new DisMaxQueryBuilder();
expectedQuery.add(innerQuery);
String contentString = "{\n" +
" \"dis_max\" : {\n" +
" \"queries\" : " + innerQuery.toString() +
" }\n" +
"}";
alternateVersions.put(contentString, expectedQuery);
return alternateVersions;
}
/**
* test `null`return value for missing inner queries
*/
public void testNoInnerQueries() throws IOException {
DisMaxQueryBuilder disMaxBuilder = new DisMaxQueryBuilder();
assertNull(disMaxBuilder.toQuery(createShardContext()));
}
/**
* Test inner query parsing to null. Current DSL allows inner filter element to parse to <tt>null</tt>.
* Those should be ignored upstream. To test this, we use inner {@link ConstantScoreQueryBuilder}
* with empty inner filter.
*/
public void testInnerQueryReturnsNull() throws IOException {
String queryString = "{ \"" + ConstantScoreQueryBuilder.NAME + "\" : { \"filter\" : { } } }";
QueryBuilder<?> innerQueryBuilder = parseQuery(queryString);
DisMaxQueryBuilder disMaxBuilder = new DisMaxQueryBuilder().add(innerQueryBuilder);
assertNull(disMaxBuilder.toQuery(createShardContext()));
}
public void testIllegalArguments() {
DisMaxQueryBuilder disMaxQuery = new DisMaxQueryBuilder();
try {
disMaxQuery.add(null);
fail("cannot be null");
} catch (IllegalArgumentException e) {
// expected
}
}
public void testToQueryInnerPrefixQuery() throws Exception {
assumeTrue("test runs only when at least a type is registered", getCurrentTypes().length > 0);
String queryAsString = "{\n" +
" \"dis_max\":{\n" +
" \"queries\":[\n" +
" {\n" +
" \"prefix\":{\n" +
" \"" + STRING_FIELD_NAME + "\":{\n" +
" \"value\":\"sh\",\n" +
" \"boost\":1.2\n" +
" }\n" +
" }\n" +
" }\n" +
" ]\n" +
" }\n" +
"}";
Query query = parseQuery(queryAsString).toQuery(createShardContext());
assertThat(query, instanceOf(DisjunctionMaxQuery.class));
DisjunctionMaxQuery disjunctionMaxQuery = (DisjunctionMaxQuery) query;
List<Query> disjuncts = disjunctionMaxQuery.getDisjuncts();
assertThat(disjuncts.size(), equalTo(1));
assertThat(disjuncts.get(0), instanceOf(BoostQuery.class));
BoostQuery boostQuery = (BoostQuery) disjuncts.get(0);
assertThat((double) boostQuery.getBoost(), closeTo(1.2, 0.00001));
assertThat(boostQuery.getQuery(), instanceOf(PrefixQuery.class));
PrefixQuery firstQ = (PrefixQuery) boostQuery.getQuery();
// since age is automatically registered in data, we encode it as numeric
assertThat(firstQ.getPrefix(), equalTo(new Term(STRING_FIELD_NAME, "sh")));
}
public void testFromJson() throws IOException {
String json =
"{\n" +
" \"dis_max\" : {\n" +
" \"tie_breaker\" : 0.7,\n" +
" \"queries\" : [ {\n" +
" \"term\" : {\n" +
" \"age\" : {\n" +
" \"value\" : 34,\n" +
" \"boost\" : 1.0\n" +
" }\n" +
" }\n" +
" }, {\n" +
" \"term\" : {\n" +
" \"age\" : {\n" +
" \"value\" : 35,\n" +
" \"boost\" : 1.0\n" +
" }\n" +
" }\n" +
" } ],\n" +
" \"boost\" : 1.2\n" +
" }\n" +
"}";
DisMaxQueryBuilder parsed = (DisMaxQueryBuilder) parseQuery(json);
checkGeneratedJson(json, parsed);
assertEquals(json, 1.2, parsed.boost(), 0.0001);
assertEquals(json, 0.7, parsed.tieBreaker(), 0.0001);
assertEquals(json, 2, parsed.innerQueries().size());
}
}
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