org.elasticsearch.xpack.core.index.query.PinnedQueryBuilder Maven / Gradle / Ivy
/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0; you may not use this file except in compliance with the Elastic License
* 2.0.
*/
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.SearchExecutionContext;
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 {
public static final String NAME = "pinned";
protected final QueryBuilder organicQuery;
protected final List 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 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(SearchExecutionContext 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;
}
}