org.elasticsearch.search.rescore.RescoreParseElement 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 org.elasticsearch.ElasticSearchIllegalArgumentException;
import org.elasticsearch.ElasticSearchParseException;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.index.query.ParsedQuery;
import org.elasticsearch.search.SearchParseElement;
import org.elasticsearch.search.internal.SearchContext;
/**
*
*/
public class RescoreParseElement implements SearchParseElement {
@Override
public void parse(XContentParser parser, SearchContext context) throws Exception {
String fieldName = null;
RescoreSearchContext rescoreContext = null;
Integer windowSize = null;
XContentParser.Token token;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
fieldName = parser.currentName();
if (QueryRescorer.NAME.equals(fieldName)) {
// we only have one at this point
Rescorer rescorer = QueryRescorer.INSTANCE;
token = parser.nextToken();
if (token != XContentParser.Token.START_OBJECT) {
throw new ElasticSearchParseException("rescore type malformed, must start with start_object");
}
rescoreContext = rescorer.parse(parser, context);
}
} else if (token.isValue()) {
if ("window_size".equals(fieldName)) {
windowSize = parser.intValue();
} else {
throw new ElasticSearchIllegalArgumentException("rescore doesn't support [" + fieldName + "]");
}
}
}
if (rescoreContext == null) {
throw new ElasticSearchIllegalArgumentException("missing rescore type");
}
if (windowSize != null) {
rescoreContext.setWindowSize(windowSize.intValue());
}
context.rescore(rescoreContext);
}
}