Added HLRC support for PinnedQueryBuilder

Related  #44074

Author: markharwood

client/rest-high-level/src/test/java/org/elasticsearch/client/SearchIT.java

@@ -43,6 +43,7 @@
 import org.elasticsearch.common.xcontent.XContentBuilder;
 import org.elasticsearch.common.xcontent.XContentFactory;
 import org.elasticsearch.common.xcontent.XContentType;
+import org.elasticsearch.index.query.MatchAllQueryBuilder;
 import org.elasticsearch.index.query.MatchQueryBuilder;
 import org.elasticsearch.index.query.QueryBuilders;
 import org.elasticsearch.index.query.ScriptQueryBuilder;
@@ -81,6 +82,7 @@
 import org.elasticsearch.search.suggest.Suggest;
 import org.elasticsearch.search.suggest.SuggestBuilder;
 import org.elasticsearch.search.suggest.phrase.PhraseSuggestionBuilder;
+import org.elasticsearch.xpack.core.index.query.PinnedQueryBuilder;
 import org.hamcrest.Matchers;
 import org.junit.Before;
 
@@ -92,7 +94,10 @@
 import java.util.Map;
 
 import static org.elasticsearch.common.xcontent.XContentFactory.jsonBuilder;
+import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertFirstHit;
+import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertSecondHit;
 import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertToXContentEquivalent;
+import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.hasId;
 import static org.hamcrest.Matchers.both;
 import static org.hamcrest.Matchers.containsString;
 import static org.hamcrest.Matchers.either;
@@ -1373,7 +1378,19 @@ public void testCountAllIndicesMatchQuery() throws IOException {
         assertCountHeader(countResponse);
         assertEquals(3, countResponse.getCount());
     }
-
+    
+    public void testSearchWithBasicLicensedQuery() throws IOException {
+        SearchRequest searchRequest = new SearchRequest("index");
+        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
+        PinnedQueryBuilder pinnedQuery = new PinnedQueryBuilder(new MatchAllQueryBuilder(), "2", "1");
+        searchSourceBuilder.query(pinnedQuery);
+        searchRequest.source(searchSourceBuilder);
+        SearchResponse searchResponse = execute(searchRequest, highLevelClient()::search, highLevelClient()::searchAsync);
+        assertSearchHeader(searchResponse);
+        assertFirstHit(searchResponse, hasId("2"));
+        assertSecondHit(searchResponse, hasId("1"));
+    }
+    
     private static void assertCountHeader(CountResponse countResponse) {
         assertEquals(0, countResponse.getSkippedShards());
         assertEquals(0, countResponse.getFailedShards());

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/index/query/PinnedQueryBuilder.java

@@ -0,0 +1,109 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+package org.elasticsearch.xpack.core.index.query;
+
+import org.apache.lucene.search.Query;
+import org.elasticsearch.common.ParseField;
+import org.elasticsearch.common.io.stream.StreamOutput;
+import org.elasticsearch.common.xcontent.XContentBuilder;
+import org.elasticsearch.index.query.AbstractQueryBuilder;
+import org.elasticsearch.index.query.QueryBuilder;
+import org.elasticsearch.index.query.QueryShardContext;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * A query that will promote selected documents (identified by ID) above matches produced by an "organic" query. In practice, some upstream
+ * system will identify the promotions associated with a user's query string and use this object to ensure these are "pinned" to the top of
+ * the other search results.
+ */
+public class PinnedQueryBuilder extends AbstractQueryBuilder<PinnedQueryBuilder> {
+    public static final String NAME = "pinned";
+    protected final QueryBuilder organicQuery;
+    protected final List<String> ids;    
+    protected static final ParseField IDS_FIELD = new ParseField("ids");
+    protected static final ParseField ORGANIC_QUERY_FIELD = new ParseField("organic");
+
+    @Override
+    public String getWriteableName() {
+        return NAME;
+    }
+
+    /**
+     * Creates a new PinnedQueryBuilder
+     */
+    public PinnedQueryBuilder(QueryBuilder organicQuery, String... ids) {
+      if (organicQuery == null) {
+          throw new IllegalArgumentException("[" + NAME + "] organicQuery cannot be null");
+      }
+      this.organicQuery = organicQuery;
+      if (ids == null) {
+          throw new IllegalArgumentException("[" + NAME + "] ids cannot be null");
+      }
+      this.ids = new ArrayList<>();
+      Collections.addAll(this.ids, ids);
+      
+    }
+
+
+    @Override
+    protected void doWriteTo(StreamOutput out) throws IOException {
+        out.writeStringCollection(this.ids);
+        out.writeNamedWriteable(organicQuery);
+    }
+
+    /**
+     * @return the organic query set in the constructor
+     */
+    public QueryBuilder organicQuery() {
+        return this.organicQuery;
+    }
+
+    /**
+     * Returns the pinned ids for the query.
+     */
+    public List<String> ids() {
+        return Collections.unmodifiableList(this.ids);
+    }
+    
+
+    @Override
+    protected void doXContent(XContentBuilder builder, Params params) throws IOException {
+        builder.startObject(NAME);
+        if (organicQuery != null) {
+            builder.field(ORGANIC_QUERY_FIELD.getPreferredName());
+            organicQuery.toXContent(builder, params);
+        }
+        builder.startArray(IDS_FIELD.getPreferredName());
+        for (String value : ids) {
+            builder.value(value);
+        }
+        builder.endArray();
+        printBoostAndQueryName(builder);
+        builder.endObject();
+    }
+
+    @Override
+    protected Query doToQuery(QueryShardContext context) throws IOException {
+        throw new UnsupportedOperationException("Client side-only class for use in HLRC");
+    }
+
+
+    @Override
+    protected int doHashCode() {
+        return Objects.hash(ids, organicQuery);
+    }
+
+    @Override
+    protected boolean doEquals(PinnedQueryBuilder other) {
+        return Objects.equals(ids, other.ids) && Objects.equals(organicQuery, other.organicQuery) && boost == other.boost;
+    }
+
+}