/*
* 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.rescore;
import org.apache.lucene.search.TopDocs;
import org.elasticsearch.ElasticsearchException;
import org.elasticsearch.common.component.AbstractComponent;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.search.SearchPhase;
import org.elasticsearch.search.internal.SearchContext;
import java.io.IOException;
/**
* Rescore phase of a search request, used to run potentially expensive scoring models against the top matching documents.
*/
public class RescorePhase extends AbstractComponent implements SearchPhase {
public RescorePhase(Settings settings) {
super(settings);
}
@Override
public void preProcess(SearchContext context) {
}
@Override
public void execute(SearchContext context) {
try {
TopDocs topDocs = context.queryResult().topDocs();
for (RescoreSearchContext ctx : context.rescore()) {
topDocs = ctx.rescorer().rescore(topDocs, context, ctx);
}
context.queryResult().topDocs(topDocs, context.queryResult().sortValueFormats());
} catch (IOException e) {
throw new ElasticsearchException("Rescore Phase Failed", e);
}
}
}