org.elasticsearch.search.rescore.RescoreBuilder Maven / Gradle / Ivy
/*
* Licensed to ElasticSearch and Shay Banon 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.rescore;
import java.io.IOException;
import org.elasticsearch.ElasticSearchException;
import org.elasticsearch.common.xcontent.ToXContent;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentFactory;
import org.elasticsearch.index.query.QueryBuilder;
import org.elasticsearch.index.query.QueryBuilderException;
public class RescoreBuilder implements ToXContent {
private Rescorer rescorer;
private Integer windowSize;
public static QueryRescorer queryRescorer(QueryBuilder queryBuilder) {
return new QueryRescorer(queryBuilder);
}
public RescoreBuilder rescorer(Rescorer rescorer) {
this.rescorer = rescorer;
return this;
}
public RescoreBuilder windowSize(int windowSize) {
this.windowSize = windowSize;
return this;
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
if (rescorer != null) {
builder.startObject("rescore");
if (windowSize != null) {
builder.field("window_size", windowSize);
}
rescorer.toXContent(builder, params);
builder.endObject();
}
return builder;
}
public static abstract class Rescorer implements ToXContent {
private String name;
public Rescorer(String name) {
this.name = name;
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
builder.startObject(name);
builder = innerToXContent(builder, params);
builder.endObject();
return builder;
}
protected abstract XContentBuilder innerToXContent(XContentBuilder builder, Params params) throws IOException;
}
public static class QueryRescorer extends Rescorer {
private static final String NAME = "query";
private QueryBuilder queryBuilder;
private Float rescoreQueryWeight;
private Float queryWeight;
/**
* Creates a new {@link QueryRescorer} instance
* @param builder the query builder to build the rescore query from
*/
public QueryRescorer(QueryBuilder builder) {
super(NAME);
this.queryBuilder = builder;
}
/**
* Sets the original query weight for rescoring. The default is 1.0
*/
public QueryRescorer setQueryWeight(float queryWeight) {
this.queryWeight = queryWeight;
return this;
}
/**
* Sets the original query weight for rescoring. The default is 1.0
*/
public QueryRescorer setRescoreQueryWeight(float rescoreQueryWeight) {
this.rescoreQueryWeight = rescoreQueryWeight;
return this;
}
@Override
protected XContentBuilder innerToXContent(XContentBuilder builder, Params params) throws IOException {
builder.field("rescore_query", queryBuilder);
if (queryWeight != null) {
builder.field("query_weight", queryWeight);
}
if (rescoreQueryWeight != null) {
builder.field("rescore_query_weight", rescoreQueryWeight);
}
return builder;
}
}
}